springboot整合activity实现申请流程审批 springboot整合activiti流程设计器

一、引入依赖

pom.xml下引入activiti相关库

<!-- activiti 涉及相关库（start） -->
        <dependency>
            <groupId>org.activiti</groupId>
            <artifactId>activiti-spring-boot-starter-basic</artifactId>
            <version>${activiti.version}</version>
        </dependency>

        <dependency>
            <groupId>org.activiti</groupId>
            <artifactId>activiti-spring-boot-starter-rest-api</artifactId>
            <version>${activiti.version}</version>
        </dependency>

        <dependency>
            <groupId>org.activiti</groupId>
            <artifactId>activiti-spring-boot-starter-actuator</artifactId>
            <version>${activiti.version}</version>
        </dependency>

        <dependency>
            <groupId>org.activiti</groupId>
            <artifactId>activiti-explorer</artifactId>
            <version>5.22.0</version>
            <exclusions><!-- 排除slf4j的包-->
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-log4j12</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <dependency>
            <groupId>org.apache.xmlgraphics</groupId>
            <artifactId>batik-codec</artifactId>
            <version>1.7</version>
        </dependency>

        <dependency>
            <groupId>org.apache.xmlgraphics</groupId>
            <artifactId>batik-css</artifactId>
            <version>1.7</version>
        </dependency>

        <dependency>
            <groupId>org.apache.xmlgraphics</groupId>
            <artifactId>batik-svg-dom</artifactId>
            <version>1.7</version>
        </dependency>

        <dependency>
            <groupId>org.apache.xmlgraphics</groupId>
            <artifactId>batik-svggen</artifactId>
            <version>1.7</version>
        </dependency>
        <!-- activiti 涉及相关库（end） -->

二、SpringBoot配置

application.yml文件下spring配置中加入activiti配置

#activiti配置
  activiti:
    #数据库策略false（默认） true create-drop drop-create
    database-schema-update: true
    #工作流日志级别
    history-level: activity
    #自动部署验证设置：true-开启（默认）
    check-process-definitions: false

三、编写启动类

加入禁用activiti中自动集成的security的权限验证。

可以解决：

1、与springboot中security冲突

2、让我们我们访问时不会弹出登录界面

@EnableAutoConfiguration(exclude = {org.springframework.boot.autoconfigure.security.servlet.SecurityAutoConfiguration.class,
        org.activiti.spring.boot.SecurityAutoConfiguration.class})

如下图

四、整合在线设计器（activiti modeler 组件）

1、拉取源码到本地,地址：https://github.com/Activiti/Activiti/tree/5.x

2、提取页面相关的静态文件，将源码中例子文件夹内 diagram-viewer,editor-app,modeler.html，stencilset.json拷贝到项目中resource下或其下某指定目录

其中的editor-app就是编辑器，modeler.html是编辑器的入口页面。
diagram-viewer是流程跟踪插件，虽然这次用不着，但之后会用到。
还有一个界面组件文件，在resource下，名称叫stencilset.json。本身是英文的，可以通过替换它来达到汉化的效果。但现在还是先把它放到项目中去。

例如：我没直接放到resource下，而是放在其下的static目录下，如图：

①、源码中相关文件指定位置如图：

 

 3、提取activiti-modeler项目中的StencilsetRestResource.java(模具集Rest资源)，ModelEditorJsonRestResource.java(模板编辑)，ModelSaveRestResource.java (模型保存)放置到项目中。

例如：我将以上三个文件统一放在项目的公用目录——activiti相关目录下

方案一：在源码中找到相关文件，将源文件copy到自己项目中，源码文件位置如图：

 方案二：可直接copy下面代码直接使用

ModelEditorJsonRestResource.java

import org.activiti.editor.constants.ModelDataJsonConstants;
import org.activiti.engine.ActivitiException;
import org.activiti.engine.RepositoryService;
import org.activiti.engine.repository.Model;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;

/**
 * 模板编辑
 * @author Tijs Rademakers
 */
@RestController
@RequestMapping(value = "/activitiService")
public class ModelEditorJsonRestResource implements ModelDataJsonConstants {
  
  protected static final Logger LOGGER = LoggerFactory.getLogger(ModelEditorJsonRestResource.class);
  
  @Autowired
  private RepositoryService repositoryService;
  
  @Autowired
  private ObjectMapper objectMapper;
  
  @RequestMapping(value="/model/{modelId}/json", method = RequestMethod.GET, produces = "application/json")
  public ObjectNode getEditorJson(@PathVariable String modelId) {
    ObjectNode modelNode = null;
    
    Model model = repositoryService.getModel(modelId);
      
    if (model != null) {
      try {
        if (StringUtils.isNotEmpty(model.getMetaInfo())) {
          modelNode = (ObjectNode) objectMapper.readTree(model.getMetaInfo());
        } else {
          modelNode = objectMapper.createObjectNode();
          modelNode.put(MODEL_NAME, model.getName());
        }
        modelNode.put(MODEL_ID, model.getId());
        ObjectNode editorJsonNode = (ObjectNode) objectMapper.readTree(
            new String(repositoryService.getModelEditorSource(model.getId()), "utf-8"));
        modelNode.put("model", editorJsonNode);
        
      } catch (Exception e) {
        LOGGER.error("Error creating model JSON", e);
        throw new ActivitiException("Error creating model JSON", e);
      }
    }
    return modelNode;
  }
}

ModelSaveRestResource.java

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;

import org.activiti.editor.constants.ModelDataJsonConstants;
import org.activiti.engine.ActivitiException;
import org.activiti.engine.RepositoryService;
import org.activiti.engine.repository.Model;
import org.apache.batik.transcoder.TranscoderInput;
import org.apache.batik.transcoder.TranscoderOutput;
import org.apache.batik.transcoder.image.PNGTranscoder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.util.MultiValueMap;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseStatus;
import org.springframework.web.bind.annotation.RestController;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;

/**
 * 模型保存
 * @author Tijs Rademakers
 */
@RestController
@RequestMapping(value = "/activitiService")
public class ModelSaveRestResource implements ModelDataJsonConstants {
  
  protected static final Logger LOGGER = LoggerFactory.getLogger(ModelSaveRestResource.class);

  @Autowired
  private RepositoryService repositoryService;
  
  @Autowired
  private ObjectMapper objectMapper;
  
  @RequestMapping(value="/model/{modelId}/save", method = RequestMethod.PUT)
  @ResponseStatus(value = HttpStatus.OK)
  public void saveModel(@PathVariable String modelId, @RequestBody MultiValueMap<String, String> values) {
    try {
      
      Model model = repositoryService.getModel(modelId);
      
      ObjectNode modelJson = (ObjectNode) objectMapper.readTree(model.getMetaInfo());
      
      modelJson.put(MODEL_NAME, values.getFirst("name"));
      modelJson.put(MODEL_DESCRIPTION, values.getFirst("description"));
      model.setMetaInfo(modelJson.toString());
      model.setName(values.getFirst("name"));
      
      repositoryService.saveModel(model);
      
      repositoryService.addModelEditorSource(model.getId(), values.getFirst("json_xml").getBytes("utf-8"));
      
      InputStream svgStream = new ByteArrayInputStream(values.getFirst("svg_xml").getBytes("utf-8"));
      TranscoderInput input = new TranscoderInput(svgStream);
      
      PNGTranscoder transcoder = new PNGTranscoder();
      // Setup output
      ByteArrayOutputStream outStream = new ByteArrayOutputStream();
      TranscoderOutput output = new TranscoderOutput(outStream);
      
      // Do the transformation
      transcoder.transcode(input, output);
      final byte[] result = outStream.toByteArray();
      repositoryService.addModelEditorSourceExtra(model.getId(), result);
      outStream.close();
      
    } catch (Exception e) {
      LOGGER.error("模型保存失败", e);
      throw new ActivitiException("模型保存失败", e);
    }
  }
}

StencilsetRestResource.java

import java.io.InputStream;

import org.activiti.engine.ActivitiException;
import org.apache.commons.io.IOUtils;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;

/**
 * 加载模板集
 * @author Tijs Rademakers
 */
@RestController
@RequestMapping(value = "/activitiService")
public class StencilsetRestResource {
  
  @RequestMapping(value="/editor/stencilset", method = RequestMethod.GET, produces = "application/json;charset=utf-8")
  public @ResponseBody String getStencilset() {
    InputStream stencilsetStream = this.getClass().getClassLoader().getResourceAsStream("static/stencilset.json");
    try {
      return IOUtils.toString(stencilsetStream, "utf-8");
    } catch (Exception e) {
      throw new ActivitiException("Error while loading stencil set", e);
    }
  }
}

4、以上3个java文件及所有静态页面使用的文件准备好后，开始最后的微调。

①、3个java文件上加上@RequestMapping注解，并指定值，如图：

②、修改app-cfg.js

 ③、修改StencilsetRestResource.java,将对应的stencilset.json文件所在路径完整对应，如图：

 

至此相关整合已全部完成，接下来我们模拟创建个实例看下效果吧

五、模拟实例

1、创建一个controller,提供一个调用模拟接口

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;
import org.activiti.editor.constants.ModelDataJsonConstants;
import org.activiti.engine.ProcessEngine;
import org.activiti.engine.ProcessEngines;
import org.activiti.engine.RepositoryService;
import org.activiti.engine.repository.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@RestController
@RequestMapping("/activiti")
public class ActivitiController {
    /**
     * 创建模型
     */
    @RequestMapping("/create")
    public void create(HttpServletRequest request, HttpServletResponse response) {
        try {
            ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();

            RepositoryService repositoryService = processEngine.getRepositoryService();

            ObjectMapper objectMapper = new ObjectMapper();
            ObjectNode editorNode = objectMapper.createObjectNode();
            editorNode.put("id", "canvas");
            editorNode.put("resourceId", "canvas");
            ObjectNode stencilSetNode = objectMapper.createObjectNode();
            stencilSetNode.put("namespace", "http://b3mn.org/stencilset/bpmn2.0#");
            editorNode.put("stencilset", stencilSetNode);
            Model modelData = repositoryService.newModel();

            ObjectNode modelObjectNode = objectMapper.createObjectNode();
            modelObjectNode.put(ModelDataJsonConstants.MODEL_NAME, "hello1111");
            modelObjectNode.put(ModelDataJsonConstants.MODEL_REVISION, 1);
            String description = "hello1111";
            modelObjectNode.put(ModelDataJsonConstants.MODEL_DESCRIPTION, description);
            modelData.setMetaInfo(modelObjectNode.toString());
            modelData.setName("hello1111");
            modelData.setKey("12313123");

            //保存模型
            repositoryService.saveModel(modelData);
            repositoryService.addModelEditorSource(modelData.getId(), editorNode.toString().getBytes("utf-8"));
            System.out.println(request.getContextPath() + "/modeler.html?modelId=" + modelData.getId());
            response.sendRedirect(request.getContextPath() + "/modeler.html?modelId=" + modelData.getId());
        } catch (Exception e) {
            System.out.println("创建模型失败：");
        }
    }

}

2、验证是否成功。访问http://localhost:9000/activiti/create

访问中可能出现的问题：

1、No mapping for GET /autherror

问题分析：

在使用拦截器时，在配置拦截器的时候，由于在 Spring Boot 2.0 之前，我们都是直接继承 WebMvcConfigurerAdapter 类，然后重写 addInterceptors 方法来实现拦截器的配置。但是在 Spring Boot 2.0 之后，该方法已经被废弃了（当然，也可以继续用），取而代之的是 WebMvcConfigurationSupport 方法，如下

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@Configuration
public class MyInterceptorConfig extends WebMvcConfigurationSupport {

    @Override
    protected void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(new MyInterceptor()).addPathPatterns("/**");
        super.addInterceptors(registry);
    }
}

但是，我们会发现会发现一个缺陷，那就是静态资源被拦截了。项目中集成了thymeleaf，使用th:src="/xxx/xxx"这些获取静态资源的方法便会被拦截，这就需要我们手动将静态资源放开。

即除了在 MyInterceptorConfig 配置类中重写 addInterceptors 方法，还需要再重写一个方法 addResourceHandlers，用来将静态资源放开：

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/**
 * 用来指定静态资源不被拦截，否则继承WebMvcConfigurationSupport这种方式会导致静态资源无法直接访问
 * @param registry
 */
@Override
protected void addResourceHandlers(ResourceHandlerRegistry registry) {
    registry.addResourceHandler("/**").addResourceLocations("classpath:/static/");
    super.addResourceHandlers(registry);
}

当然还有更简单的方法，就是我们可以不继承 WebMvcConfigurationSupport 类，直接实现 WebMvcConfigurer 接口，然后重写 addInterceptors 方法，将自定义的拦截器添加进去即可

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@Configuration
public class MyInterceptorConfig implements WebMvcConfigurer {
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        // 实现WebMvcConfigurer不会导致静态资源被拦截
        registry.addInterceptor(new MyInterceptor()).addPathPatterns("/**");
    }
}```

解决方案：

手动配置，WebMvcConfig.java

package com.ihrm; import org.springframework.context.annotation.Configuration; import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry; import org.springframework.web.servlet.config.annotation.WebMvcConfigurer; /** * Config - WebMvc */ @Configuration public class WebMvcConfig implements WebMvcConfigurer { //解决 No mapping for GET 访问静态资源问题 @Override public void addResourceHandlers(ResourceHandlerRegistry registry) { registry.addResourceHandler("/**") .addResourceLocations("classpath:/static/") .addResourceLocations("classpath:/META-INF/resources/"); } }

2、Bad request

 问题分析：

@RequestBody MultiValueMap不支持内容类型'application/x-www-form-urlencoded; charset = UTF-8'，因为我们的请求是：

Content-Type:

application/x-www-form-urlencoded; charset=UTF-8

 解决方案：

修改ModelSaveRestResource.java

/* Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.ihrm.activiti.editor; import com.fasterxml.jackson.databind.ObjectMapper; import com.fasterxml.jackson.databind.node.ObjectNode; import org.activiti.editor.constants.ModelDataJsonConstants; import org.activiti.engine.ActivitiException; import org.activiti.engine.RepositoryService; import org.activiti.engine.repository.Model; import org.apache.batik.transcoder.TranscoderInput; import org.apache.batik.transcoder.TranscoderOutput; import org.apache.batik.transcoder.image.PNGTranscoder; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.http.HttpStatus; import org.springframework.web.bind.annotation.*; import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.InputStream; /** * 模型保存 * * @author Tijs Rademakers */ @RestController @RequestMapping(value = "/activitiService") public class ModelSaveRestResource implements ModelDataJsonConstants { protected static final Logger LOGGER = LoggerFactory.getLogger(ModelSaveRestResource.class); @Autowired private RepositoryService repositoryService; @Autowired private ObjectMapper objectMapper; @RequestMapping(value = "/model/{modelId}/save", method = RequestMethod.PUT) @ResponseStatus(value = HttpStatus.OK) public void saveModel(@PathVariable String modelId, String name, String description, String json_xml, String svg_xml) { try { Model model = repositoryService.getModel(modelId); ObjectNode modelJson = (ObjectNode) objectMapper.readTree(model.getMetaInfo()); modelJson.put(MODEL_NAME, name); modelJson.put(MODEL_DESCRIPTION, description); model.setMetaInfo(modelJson.toString()); model.setName(name); repositoryService.saveModel(model); repositoryService.addModelEditorSource(model.getId(), json_xml.getBytes("utf-8")); InputStream svgStream = new ByteArrayInputStream(svg_xml.getBytes("utf-8")); TranscoderInput input = new TranscoderInput(svgStream); PNGTranscoder transcoder = new PNGTranscoder(); // Setup output ByteArrayOutputStream outStream = new ByteArrayOutputStream(); TranscoderOutput output = new TranscoderOutput(outStream); // Do the transformation transcoder.transcode(input, output); final byte[] result = outStream.toByteArray(); repositoryService.addModelEditorSourceExtra(model.getId(), result); outStream.close(); } catch (Exception e) { LOGGER.error("Error saving model", e); throw new ActivitiException("模型保存失败", e); } } }

六、汉化

找到stencilset.json，将内容替换

{
  "title" : "BPMN 2.0标准工具",
  "namespace" : "http://b3mn.org/stencilset/bpmn2.0#",
  "description" : "BPMN process editor",
  "propertyPackages" : [ {
    "name" : "process_idpackage",
    "properties" : [ {
      "id" : "process_id",
      "type" : "String",
      "title" : "流程名称",
      "value" : "process",
      "description" : "流程的特殊唯一的名称标识",
      "popular" : true
    } ]
  }, {
    "name" : "overrideidpackage",
    "properties" : [ {
      "id" : "overrideid",
      "type" : "String",
      "title" : "Id",
      "value" : "",
      "description" : "Unique identifier of the element.",
      "popular" : true
    } ]
  }, {
    "name" : "namepackage",
    "properties" : [ {
      "id" : "name",
      "type" : "String",
      "title" : "名称",
      "value" : "",
      "description" : "元素名称",
      "popular" : true,
      "refToView" : "text_name"
    } ]
  }, {
    "name" : "documentationpackage",
    "properties" : [ {
      "id" : "documentation",
      "type" : "Text",
      "title" : "描述",
      "value" : "",
      "description" : "元素描述",
      "popular" : true
    } ]
  }, {
    "name" : "process_authorpackage",
    "properties" : [ {
      "id" : "process_author",
      "type" : "String",
      "title" : "流程作者",
      "value" : "",
      "description" : "流程定义者姓名",
      "popular" : true
    } ]
  }, {
    "name" : "process_versionpackage",
    "properties" : [ {
      "id" : "process_version",
      "type" : "String",
      "title" : "流程版本",
      "value" : "",
      "description" : "标识文档版本",
      "popular" : true
    } ]
  }, {
    "name" : "process_namespacepackage",
    "properties" : [ {
      "id" : "process_namespace",
      "type" : "String",
      "title" : "目标命名空间",
      "value" : "http://www.activiti.org/processdef",
      "description" : "工作流目标命名空间",
      "popular" : true
    } ]
  }, {
    "name" : "asynchronousdefinitionpackage",
    "properties" : [ {
      "id" : "asynchronousdefinition",
      "type" : "Boolean",
      "title" : "异步",
      "value" : "false",
      "description" : "Define the activity as asynchronous.",
      "popular" : true
    } ]
  }, {
    "name" : "exclusivedefinitionpackage",
    "properties" : [ {
      "id" : "exclusivedefinition",
      "type" : "Boolean",
      "title" : "单独",
      "value" : "false",
      "description" : "Define the activity as exclusive.",
      "popular" : true
    } ]
  }, {
    "name" : "executionlistenerspackage",
    "properties" : [ {
      "id" : "executionlisteners",
      "type" : "multiplecomplex",
      "title" : "执行监听器",
      "value" : "",
      "description" : "Listeners for an activity, process, sequence flow, start and end event.",
      "popular" : true
    } ]
  }, {
    "name" : "tasklistenerspackage",
    "properties" : [ {
      "id" : "tasklisteners",
      "type" : "multiplecomplex",
      "title" : "任务监听器",
      "value" : "",
      "description" : "Listeners for a user task",
      "popular" : true
    } ]
  }, {
    "name" : "eventlistenerspackage",
    "properties" : [ {
      "id" : "eventlisteners",
      "type" : "multiplecomplex",
      "title" : "事件监听器",
      "value" : "",
      "description" : "Listeners for any event happening in the Activiti Engine. It's also possible to rethrow the event as a signal, message or error event",
      "popular" : true
    } ]
  }, {
    "name" : "usertaskassignmentpackage",
    "properties" : [ {
      "id" : "usertaskassignment",
      "type" : "Complex",
      "title" : "代理",
      "value" : "",
      "description" : "Assignment definition for the user task",
      "popular" : true
    } ]
  }, {
    "name" : "formpropertiespackage",
    "properties" : [ {
      "id" : "formproperties",
      "type" : "Complex",
      "title" : "动态表单属性",
      "value" : "",
      "description" : "Definition of the form with a list of form properties",
      "popular" : true
    } ]
  }, {
    "name" : "formkeydefinitionpackage",
    "properties" : [ {
      "id" : "formkeydefinition",
      "type" : "String",
      "title" : "自定义表单",
      "value" : "",
      "description" : "用户任务表单编号",
      "popular" : true
    } ]
  }, {
    "name" : "duedatedefinitionpackage",
    "properties" : [ {
      "id" : "duedatedefinition",
      "type" : "String",
      "title" : "到期日期",
      "value" : "",
      "description" : "用户任务到期时间",
      "popular" : true
    } ]
  }, {
    "name" : "prioritydefinitionpackage",
    "properties" : [ {
      "id" : "prioritydefinition",
      "type" : "String",
      "title" : "优先级",
      "value" : "",
      "description" : "用户任务优先级",
      "popular" : true
    } ]
  }, {
    "name" : "duedatedefinitionpackage",
    "properties" : [ {
      "id" : "duedatedefinition",
      "type" : "String",
      "title" : "到期日期",
      "value" : "",
      "description" : "Due date of the user task.",
      "popular" : true
    } ]
  }, {
    "name" : "servicetaskclasspackage",
    "properties" : [ {
      "id" : "servicetaskclass",
      "type" : "String",
      "title" : "监听类",
      "value" : "",
      "description" : "Class that implements the service task logic.",
      "popular" : true
    } ]
  }, {
    "name" : "servicetaskexpressionpackage",
    "properties" : [ {
      "id" : "servicetaskexpression",
      "type" : "String",
      "title" : "表达式",
      "value" : "",
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        "from" : "DataStore",
        "to" : [ "sequence_start" ]
      } ]
    }, {
      "role" : "IntermediateEventOnActivityBoundary",
      "connects" : [ {
        "from" : "Activity",
        "to" : [ "IntermediateEventOnActivityBoundary" ]
      } ]
    } ],
    "containmentRules" : [ {
      "role" : "BPMNDiagram",
      "contains" : [ "all" ]
    }, {
      "role" : "SubProcess",
      "contains" : [ "sequence_start", "sequence_end", "from_task_event", "to_task_event", "EventSubProcess", "TextAnnotation", "DataStore" ]
    }, {
      "role" : "EventSubProcess",
      "contains" : [ "sequence_start", "sequence_end", "from_task_event", "to_task_event", "TextAnnotation", "DataStore" ]
    }, {
      "role" : "Pool",
      "contains" : [ "Lane" ]
    }, {
      "role" : "Lane",
      "contains" : [ "sequence_start", "sequence_end", "EventSubProcess", "TextAnnotation", "DataStore" ]
    } ],
    "morphingRules" : [ {
      "role" : "ActivitiesMorph",
      "baseMorphs" : [ "UserTask" ],
      "preserveBounds" :

七、业务实战

1、模型管理

主要功能：模型创建、发布、编辑、删除。是主要使用activiti在线编辑器的模块。如图：

 

 前端代码就不附上了，以下为后端核心代码：

ActivitiModelController.java

package com.ihrm.activiti.controller;

import com.alibaba.fastjson.JSON;
import com.ihrm.activiti.service.ActivitiModelService;
import com.ihrm.common.dto.Result;
import com.ihrm.common.dto.ResultCode;
import com.ihrm.common.exception.CommonException;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiImplicitParam;
import io.swagger.annotations.ApiImplicitParams;
import io.swagger.annotations.ApiOperation;
import org.activiti.engine.RepositoryService;
import org.activiti.engine.repository.Model;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.data.web.PageableDefault;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.Map;

@RestController
//4.swagger
@Api(tags = "工作流-模型管理")
@RequestMapping("/activiti/model")
public class ActivitiModelController {
    @Autowired
    private RepositoryService repositoryService;
    @Autowired
    private ActivitiModelService activitiModelService;

    /**
     * 查询列表
     */
    @ApiOperation(value = "查询列表")
    @ApiImplicitParams({
            @ApiImplicitParam(name = "map", value = "查询条件：{" +
                    "name$like=名称模糊 ," +
                    "name=名称 ," +
                    "id=id ," +
                    "key=key ," +
                    "}", dataType = "string", paramType = "query", required = true),
            @ApiImplicitParam(name = "pageNumber", value = "页码", dataType = "string", paramType = "query", required = true),
            @ApiImplicitParam(name = "pageSize", value = "每页数量", dataType = "string", paramType = "query", required = true)})
    @RequestMapping(value = "/page", method = RequestMethod.GET)
    public Result<Page> page(@RequestParam(value = "map") String map, @PageableDefault(value = 20) Pageable pageable) {
        Map reqMap = JSON.parseObject(map, Map.class);
        Page page = activitiModelService.page(reqMap, pageable);
        return new Result(ResultCode.SUCCESS, page);
    }


    /**
     * 创建模型
     */
    @ApiOperation(value = "创建模型")
    @RequestMapping(value = "/create" , method = RequestMethod.GET)
    public void create(HttpServletRequest request, HttpServletResponse response) throws CommonException {
        try {
            Model model = activitiModelService.create();
            response.sendRedirect(request.getContextPath() + "/modeler.html?modelId=" + model.getId());
        } catch (IOException e) {
            throw new CommonException(ResultCode.FAIL);
        }
    }

    /**
     * 根据ID查询
     *
     * @param id
     * @param request
     * @param response
     */
    @ApiOperation(value = "根据ID查询")
    @ApiImplicitParams({
            @ApiImplicitParam(name = "id", value = "唯一标识", dataType = "string", paramType = "path", required = true)})
    @RequestMapping(value = "/{id}", method = RequestMethod.GET)
    public void findById(@PathVariable(value = "id") String id, HttpServletRequest request, HttpServletResponse response) throws CommonException {
        try {
            response.sendRedirect(request.getContextPath() + "/modeler.html?modelId=" + id);
        } catch (IOException e) {
            throw new CommonException(ResultCode.NO_EXISTS);
        }
    }

    /**
     * 物理删除
     *
     * @param id
     * @return
     */
    @ApiOperation(value = "根据id删除(物理删除)")
    @ApiImplicitParams({
            @ApiImplicitParam(name = "id", value = "唯一标识", dataType = "string", paramType = "path", required = true)})
    @RequestMapping(value = "/{id}", method = RequestMethod.DELETE)
    public Result del(@PathVariable(value = "id") String id) {
        repositoryService.deleteModel(id);
        return new Result(ResultCode.SUCCESS);
    }

    /**
     * 关闭本次操作
     * @param id
     * @param response
     */
    @ApiOperation(value = "关闭本次操作")
    @ApiImplicitParams({
            @ApiImplicitParam(name = "id", value = "唯一标识", dataType = "string", paramType = "path", required = true)})
    @RequestMapping(value = "/close/{id}", method = RequestMethod.GET)
    public void close(@PathVariable(value = "id") String id, HttpServletResponse response) {
        Model model = repositoryService.getModel(id);
        if (model != null && !model.hasEditorSourceExtra()) {
            repositoryService.deleteModel(id);
        }
    }

    /**
     * 发布
     *
     * @param id
     */
    @ApiOperation(value = "发布")
    @ApiImplicitParams({
            @ApiImplicitParam(name = "id", value = "唯一标识", dataType = "string", paramType = "path", required = true)})
    @RequestMapping(value = "/deploy/{id}", method = RequestMethod.PUT)
    public Result deploy(@PathVariable(value = "id") String id){
        boolean deploy = false;
        try {
            deploy = activitiModelService.deploy(id);
        } catch (CommonException e) {
            return e.getResult() != null ? e.getResult() : new Result(e.getResultCode());
        }
        return deploy ? Result.SUCCESS() : Result.FAIL();
    }
}

ActivitiModelServiceImpl.java

package com.ihrm.activiti.service.impl;

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;
import com.ihrm.activiti.service.ActivitiModelService;
import com.ihrm.activiti.validator.ModelIntegrityValidator;
import com.ihrm.common.dto.Result;
import com.ihrm.common.dto.ResultCode;
import com.ihrm.common.exception.CommonException;
import com.ihrm.common.utils.CommonUtils;
import com.ihrm.common.utils.IConstant;
import com.ihrm.common.utils.ShiroUtils;
import org.activiti.bpmn.converter.BpmnXMLConverter;
import org.activiti.bpmn.model.BpmnModel;
import org.activiti.editor.constants.ModelDataJsonConstants;
import org.activiti.editor.language.json.converter.BpmnJsonConverter;
import org.activiti.engine.RepositoryService;
import org.activiti.engine.repository.Deployment;
import org.activiti.engine.repository.Model;
import org.activiti.engine.repository.ModelQuery;
import org.activiti.engine.repository.ProcessDefinition;
import org.activiti.validation.ProcessValidator;
import org.activiti.validation.ProcessValidatorFactory;
import org.activiti.validation.ValidationError;
import org.activiti.validation.validator.ValidatorSet;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.stereotype.Service;

import javax.transaction.Transactional;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.Collections;
import java.util.List;
import java.util.Map;

/**
 * Service - 工作流模板
 */
@Service
public class ActivitiModelServiceImpl implements ActivitiModelService {
    @Autowired
    private RepositoryService repositoryService;
    @Autowired
    private ObjectMapper objectMapper;

    /**
     * 分页查询
     *
     * @param reqMap
     * @param pageable
     * @return
     */
    @Override
    public Page page(Map reqMap, Pageable pageable) {
        ModelQuery modelQuery = repositoryService.createModelQuery().notDeployed().latestVersion().orderByLastUpdateTime().desc();
        String _likeName = (String) reqMap.get("name$like");
        String _name = (String) reqMap.get("name");
        String _id = (String) reqMap.get("id");
        String _key = (String) reqMap.get("key");

        if (StringUtils.isNoneBlank(_likeName)) {
            modelQuery.modelNameLike(_likeName);
        }

        if (StringUtils.isNoneBlank(_name)) {
            modelQuery.modelName(_name);
        }

        if (StringUtils.isNoneBlank(_id)) {
            modelQuery.modelId(_id);
        }

        if (StringUtils.isNoneBlank(_key)) {
            modelQuery.modelKey(_key);
        }

        modelQuery.modelTenantId(ShiroUtils.getCompanyId());

        List<Model> models = modelQuery.listPage(pageable.getPageNumber(), pageable.getPageSize());
        return CommonUtils.listConvertToPage(models, pageable);
    }

    /**
     * 创建模型
     *
     * @return
     */
    @Override
    public Model create() throws CommonException {
        //初始化一个空模型
        Model model = repositoryService.newModel();

        try {
            //设置一些默认信息
            String name = "流程-" + System.currentTimeMillis();
            String description = "";
            int revision = 1;
            String key = com.ihrm.common.utils.StringUtils.getShortStr(name);

            ObjectNode modelNode = objectMapper.createObjectNode();
            modelNode.put(ModelDataJsonConstants.MODEL_NAME, name);
            modelNode.put(ModelDataJsonConstants.MODEL_DESCRIPTION, description);
            modelNode.put(ModelDataJsonConstants.MODEL_REVISION, revision);

            model.setName(name);
            model.setKey(key);
            model.setMetaInfo(modelNode.toString());
            model.setTenantId(ShiroUtils.getCompanyId());//设置租户

            repositoryService.saveModel(model);
            String id = model.getId();

            //完善ModelEditorSource
            ObjectNode editorNode = objectMapper.createObjectNode();
            editorNode.put("id", "canvas");
            editorNode.put("resourceId", "canvas");
            ObjectNode stencilSetNode = objectMapper.createObjectNode();
            stencilSetNode.put("namespace",
                    "http://b3mn.org/stencilset/bpmn2.0#");
            editorNode.put("stencilset", stencilSetNode);

            repositoryService.addModelEditorSource(id, editorNode.toString().getBytes("utf-8"));
        } catch (UnsupportedEncodingException e) {
            throw new CommonException(ResultCode.FAIL);
        }
        return model;
    }

    /**
     * 部署
     *
     * @param id
     * @return
     */
    @Override
    @Transactional
    public boolean deploy(String id) throws CommonException {
        Model modelData = repositoryService.getModel(id);
        BpmnJsonConverter jsonConverter = new BpmnJsonConverter();
        JsonNode editor = null;
        try {
            editor = new ObjectMapper().readTree(repositoryService.getModelEditorSource(modelData.getId()));
        } catch (IOException e) {
            throw new CommonException(Result.FAIL());
        }
        BpmnModel bpmnModel = jsonConverter.convertToBpmnModel(editor);

        //一、校验模型正确性
        //创建模型校验器工厂
        ProcessValidatorFactory processValidatorFactory = new ProcessValidatorFactory();
        //创建默认模型校验器
        ProcessValidator processValidator = processValidatorFactory.createDefaultProcessValidator();
        //加入自定义校验器
        List<ValidatorSet> validatorSets = processValidator.getValidatorSets();
        //①、模型完整性校验器
        ValidatorSet modelIntegrityValidatorSet = new ValidatorSet("验证模型完整性");
        modelIntegrityValidatorSet.addValidator(new ModelIntegrityValidator());
        validatorSets.add(modelIntegrityValidatorSet);
        Collections.reverse(validatorSets);

        //进行模型校验
        List<ValidationError> validate = processValidator.validate(bpmnModel);

        //如果校验错误集合长度大于1，则说明校验出错，遍历打印出错信息
        if(validate.size()>=1){
            for (ValidationError validationError : validate) {
                throw new CommonException(Result.FAIL(validationError.getProblem()));
            }
        }

        //二、部署
        BpmnXMLConverter xmlConverter = new BpmnXMLConverter();
        byte[] bpmnBytes = xmlConverter.convertToXML(bpmnModel);

        String processName = modelData.getName();
        if (!StringUtils.endsWith(processName, IConstant.BPMN20)) {
            processName += IConstant.BPMN20;
        }
        Deployment deployment = repositoryService.createDeployment()
                .name(modelData.getName())
                .key(modelData.getKey())
                .addBytes(processName , bpmnBytes)
                .deploy();

        //2、保存模型部署信息
        modelData.setDeploymentId(deployment.getId());
        repositoryService.saveModel(modelData);

        //3、设置流程分类
        List<ProcessDefinition> list = repositoryService.createProcessDefinitionQuery().deploymentId(deployment.getId()).list();
        for (ProcessDefinition processDefinition : list) {
            repositoryService.setProcessDefinitionCategory(processDefinition.getId(), modelData.getCategory());
        }

        return list.size() > 0;
    }
}

---

数据表信息参考《activiti数据表》

1、创建/编辑模型时：act_re_model、act_ge_bytearray

act_re_model（模型）

 act_ge_bytearray（二进制内容表）

2、发布时：act_re_model 、act_re_procdef、act_re_deployment、act_ge_bytearray

act_re_model（模型）

 act_re_deployment（部署）

 act_ge_bytearray（二进制内容表）

 act_re_procdef（流程定义）

 

---

开发中个性需求记录

需求一：在线编辑器中关闭、保存并关闭按钮，点击完成后从编辑页面跳转到列表页。

问题：未改动前，点击完成报404错误

分析：resources\static\editor-app\configuration\toolbar-default-actions.js

查看相关函数源码：

closeEditor: function (services) { window.location.href = "./"; }, $scope.saveAndClose = function () { $scope.save(function () { window.location.href = "./"; }); };

可以看出源码中业务的最终指向是在线编辑所放置的项目根路由。

方案：

closeEditor: function (services) { // window.location.href = "./"; if (window.confirm('确定要放弃此次编辑吗？')){ //1、关闭前对于未点击保存的模型做删除处理 var modelMetaData = services.$scope.editor.getModelMetaData(); location.href = "/activiti/model/close/" + modelMetaData.modelId; //2、返回上一页面 window.history.back(-1); } }, $scope.saveAndClose = function () { $scope.save(function () { // window.location.href = "./"; window.history.back(-1);//返回上一页面 }); };

需求二：模型发布时加入自定义校验

详述：发布模型时对模型的正确性进行校验，例如：

1、是否是完整的流程：存在起始/结束事件，含有用户活动等

思路：

如何自定义校验： 

源码：

package com.ihrm.activiti.validator; import cn.hutool.core.collection.CollectionUtil; import org.activiti.bpmn.model.Process; import org.activiti.bpmn.model.*; import org.activiti.validation.ValidationError; import org.activiti.validation.validator.ProcessLevelValidator; import org.apache.commons.lang3.StringUtils; import java.util.List; /** * 模型完整性验证器 */ public class ModelIntegrityValidator extends ProcessLevelValidator { private Process process; private BpmnModel bpmnModel; private List<ValidationError> errors; public ModelIntegrityValidator() { } @Override protected void executeValidation(BpmnModel bpmnModel, Process process, List<ValidationError> errors) { this.bpmnModel = bpmnModel; this.process = process; this.errors = errors; //0、校验流程信息 this.validateProcessInfo(); //1、校验开始事件 this.validateStartEvents(); //2、校验结束事件 this.validateEndEvents(); //3、验证userTasks this.validateUserTasks(); //4、校验连线 this.validateSequenceFlows(); //TODO } /** * 验证流程信息 */ private void validateProcessInfo() { //1、验证process_id String processId = process.getId(); if(StringUtils.isBlank(processId)){ addError("未设置流程ID"); }else{ //2、验证NCName的有效性 if(!processId.matches("^[a-zA-z].*")){ addError("设置的流程ID为无效ID"); } } //2、验证流程名称 String name = process.getName(); if(StringUtils.isBlank(name)){ addError("未设置流程名称"); } } /** * 验证连线 */ protected void validateSequenceFlows() { List<SequenceFlow> flowElements = process.findFlowElementsOfType(SequenceFlow.class); if(CollectionUtil.isEmpty(flowElements)){ addError("未设置【连线】"); }else{ //1、验证连线是否连接节点 for(SequenceFlow sequenceFlow : flowElements){ String sourceRef = sequenceFlow.getSourceRef(); String targetRef = sequenceFlow.getTargetRef(); if(StringUtils.isBlank(sourceRef) || StringUtils.isBlank(targetRef)){ addError("【连线】存在断点"); break; } } } } /** * 验证开始事件 */ protected void validateStartEvents(){ List<StartEvent> startEvents = process.findFlowElementsOfType(StartEvent.class); //1、是否存在开始节点 if(CollectionUtil.isEmpty(startEvents)){ addError("未设置【开始】节点"); }else{ //2、是否存在多个节点 if(startEvents.size() > 1){ addError("存在多个【开始】节点"); }else{ //3、校验节点连线情况 StartEvent startEvent = startEvents.get(0); checkLinks(startEvent); } } } /** * 验证结束事件 */ protected void validateEndEvents(){ List<EndEvent> endEvents = process.findFlowElementsOfType(EndEvent.class); //1、是否存在结束节点 if(CollectionUtil.isEmpty(endEvents)){ addError("未设置【结束】节点"); }else{ //2、是否存在多个节点 if(endEvents.size() > 1){ addError("存在多个【结束】节点"); }else{ //3、校验节点连线情况 EndEvent endEvent = endEvents.get(0); checkLinks(endEvent); } } } /** * 验证userTasks */ protected void validateUserTasks(){ List<UserTask> userTasks = process.findFlowElementsOfType(UserTask.class); //1、是否存在用户节点 if(CollectionUtil.isEmpty(userTasks)){ addError("未设置【用户】节点"); }else{ //2、检验所有用户节点连线情况 for(UserTask userTask : userTasks){ String name = userTask.getName(); if(StringUtils.isBlank(name)){ addError("某用户节点未设置名称"); break; } checkLinks(userTask); } } } /** * 添加错误 * @param message */ private void addError(String message){ ValidationError validationError = new ValidationError(); validationError.setProblem(message); validationError.setWarning(false); errors.add(validationError); } /** * 检测节点连线情况 * @param flowElement */ private void checkLinks(FlowElement flowElement) { //1、开始节点的校验 if(flowElement instanceof StartEvent){ StartEvent startEvent = (StartEvent) flowElement; checkOutGoing(StringUtils.isBlank(startEvent.getName()) ? "开始" : startEvent.getName() , startEvent.getOutgoingFlows()); } //2、结束节点的校验 if(flowElement instanceof EndEvent){ EndEvent endEvent = (EndEvent) flowElement; checkIncoming(StringUtils.isBlank(endEvent.getName()) ? "结束" : endEvent.getName() , endEvent.getIncomingFlows()); } //3、用户节点的校验 if(flowElement instanceof UserTask){ UserTask userTask = (UserTask) flowElement; checkIncoming(StringUtils.isBlank(userTask.getName()) ? "未知用户" : userTask.getName() , userTask.getIncomingFlows()); checkOutGoing(StringUtils.isBlank(userTask.getName()) ? "未知用户" : userTask.getName() , userTask.getOutgoingFlows()); } } /** * 检测指向 * @param nodeName * @param sequenceFlows */ private void checkOutGoing(String nodeName , List<SequenceFlow> sequenceFlows){ if(CollectionUtil.isEmpty(sequenceFlows)){ addError("【"+ nodeName +"】节点未设置与后续节点的连线"); }else{ for(SequenceFlow sequenceFlow : sequenceFlows){ //存在多个分支时，则进行条件校验 if(sequenceFlows.size() > 1){ String conditionExpression = sequenceFlow.getConditionExpression(); if(StringUtils.isBlank(conditionExpression)){ addError("【"+ nodeName +"】节点后面存在多条路径分支，存在某分支未配置条件"); break; } } } } } /** * 检测进入 * @param nodeName * @param sequenceFlows */ private void checkIncoming(String nodeName , List<SequenceFlow> sequenceFlows){ if(CollectionUtil.isEmpty(sequenceFlows)){ addError("【"+ nodeName +"】节点未设置与前段节点的连线"); }else{ for(SequenceFlow sequenceFlow : sequenceFlows){ //存在多个分支时，则进行条件校验 if(sequenceFlows.size() > 1){ String conditionExpression = sequenceFlow.getConditionExpression(); if(StringUtils.isBlank(conditionExpression)){ addError("【"+ nodeName +"】节点前面存在多条路径分支，存在某分支未配置条件"); break; } } } } } }

---

开发中问题记录

问题一、流程图片乱码问题

 springboot解决方案：

加入activiti配置：

package com.ihrm.common.config; import org.activiti.spring.SpringProcessEngineConfiguration; import org.activiti.spring.boot.ProcessEngineConfigurationConfigurer; import org.springframework.context.annotation.Configuration; /** * Config - 工作流 */ @Configuration public class ActivitiConfig implements ProcessEngineConfigurationConfigurer { /** * 解決工做流生成图片乱码问题 * * @param processEngineConfiguration processEngineConfiguration */ @Override public void configure(SpringProcessEngineConfiguration processEngineConfiguration) { processEngineConfiguration.setActivityFontName("宋体"); processEngineConfiguration.setAnnotationFontName("宋体"); processEngineConfiguration.setLabelFontName("宋体"); } }

2、流程配置

数据表信息参考《activiti数据表》

1、启用时：

act_hi_procinst（流程实例历史）

 

act_ru_execution（执行）

act_ru_identitylink（参与者)

 

act_hi_actinst（环节历史信息）

 act_ru_task（任务）

八、activiti数据表

1. 数据库表的命名

Activiti的表都以ACT_开头。 第二部分是表示表的用途的两个字母标识。 用途也和服务的API对应。

2.数据表的分类

activiti的28张数据表组成了严密的工作流存储机制，总共有如下六大类。

• ACT_GE: general，用来保存一些通用数据。
• ACT_RE: repository，存储表，用来保存工作流定义、部署等信息。
• ACT_ID: identity，身份表，用来保存user、user group以及两者之间绑定关系的数据。
• ACT_RU: runtime，运行时表，用来保存流程运行时的数据，如工作流实例、权限、参数等等。
• ACT_HI: history，用来保存流程的历史数据。

3.数据表的含义

此外还有两张表：ACT_EVT_LOG和ACT_PROCDEF_INFO没有按照规则来，两者分别属于HI和RE。

4. 数据库表结构

4.1 ACT_RE_ （流程定义表）

ACT_RE_DEPLOYMENT（部署）

ACT_RE_MODEL（模型）

ACT_RE_PROCDEF （流程定义）

4.2 ACT_RU_ （运行实例表）

ACT_RU_EVENT_SUBSCR（事件订阅）

ACT_RU_EXECUTION（执行）

 ACT_RU_IDENTITYLINK（参与者)

ACT_RU_JOB（异步作业）

ACT_RU_TASK（任务）

ACT_RU_VARIABLE（变量）

4.3 ACT_HI_  （流程历史记录）

ACT_HI_ACTINST（环节历史信息）

ACT_HI_ATTACHMENT（附件）

 ACT_HI_COMMENT（评论）

 ACT_HI_DETAIL（历史详情信息）

ACT_HI_IDENTITYLINK（参与者历史）

 ACT_HI_PROCINST（流程实例历史）

 ACT_HI_TASKINST（任务历史）

ACT_HI_VARINST（变量历史）

4.4 ACT_GE_ （普通数据）

ACT_GE_BYTEARRAY（二进制内容表）

所有二进制内容都会保存在这个表里，比如部署的process.bpmn20.xml, process.png, user.form, 附件，bean序列化为二进制的流程变量。

ACT_GE_PROPERTY（全局参数表）

全局参数，默认三个参数next.dbid，IdGenerator区间，schema.history，自动执行sql历史，schema.version，当前sql版本。

4.5 ACT_ID_ （用户用户组表）

ACT_ID_GROUP（群组）

ACT_ID_INFO（用户详细信息）

ACT_ID_MEMBERSHIP（用户群组关系）

ACT_ID_USER（用户基本信息）

4.6 其他

ACT_EVT_LOG（事件日志表)

默认不开启

ACT_PROCDEF_INFO（流程定义更新信息）

 

九、学习Activiti-各种Service

ManagementService

　　ManagementService是一般用来对Activiti流程引擎的管理和维护。

RepositoryService

　　从名字上可以看出来，repository，仓库、贮藏，对应到Activiti中，也就是“资源的管理”，比如流程定义的控制管理（发布、删除、挂起、激活....）；

DynamicBpmnService

　　RepositoryService可以用来部署流程定义（使用xml形式定义好的），一旦部署到Activiti（解析后保存到DB），那么流程定义就不会再变了，除了修改xml定义文件内容；

　　而DynamicBpmnService就允许我们在程序运行过程中去修改流程定义，比如修改流程定义中的分配角色、优先级、流程流转的条件...

RuntimeService

　　可以通过RuntimeService对流程实例进行相关的操作，比如管理流程实例的角色、分配人...以及执行信息的查询

TaskService

　　TaskService可以对任务进行管理和查询。

HistoryService

　　HistoryService提供了查询历史信息的功能，包括流程实例信息、参与者信息、完成时间....