ssm作为我们java程序猿的开发神器，极大地简化了开发，为我们提供了很大的便利，今天聊一聊ssm的整合。

这是我的架构图，

ssm架构实例 ssm架构图_后端


看完了了架构图那么就开始架构搭建：

一、创建maven工程使用web骨架

ssm架构实例 ssm架构图_后端_02

二、补全目录结构

ssm架构实例 ssm架构图_java_03

三、编写web.xml配置文件

**//配置文件头信息**
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">


<display-name>Archetype Created Web Application</display-name>
**//定义filter过滤器，防止中文乱码**
  <filter>
    <filter-name>CharacterEncodingFilter</filter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <init-param>
      <param-name>encoding</param-name>
      <param-value>UTF-8</param-value>
    </init-param>
  </filter>
  //filter-mapping映射，设置过滤所有路径
  <filter-mapping>
    <filter-name>CharacterEncodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
**//  配置mvc DispatcherServlet 并加载配置文件**
  <servlet>
    <servlet-name>DispatcherServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:spring-mvc.xml</param-value>
    </init-param>
  </servlet>
  <servlet-mapping>
    <servlet-name>DispatcherServlet</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>
  **//配置监听器，加载spring-service配置文件**
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:spring-service.xml</param-value>
  </context-param>
</web-app>

注意：复制时需要把上面的**中的文字去掉，只是为了更容易辨认，并不是xml注释

四、编写spring-mvc.xml

<?xml version="1.0" encoding="UTF-8" ?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">

    <!--组件扫描  主要扫描controller-->
    <context:component-scan base-package="com.itheima.controller"></context:component-scan>
    <!--配置mvc注解驱动-->
    <mvc:annotation-driven></mvc:annotation-driven>
    <!--开发静态资源访问权限-->
    <mvc:default-servlet-handler></mvc:default-servlet-handler>
</beans>

五、编写spring-service.xml

<?xml version="1.0" encoding="UTF-8" ?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">

    <!--组件扫描 扫描service和mapper-->
    <context:component-scan base-package="com.itheima.service"></context:component-scan>
    <context:component-scan base-package="com.itheima.mapper"></context:component-scan>

    <!--加载propeties文件-->
    <context:property-placeholder location="classpath:jdbc.properties"></context:property-placeholder>

    <!--配置数据源信息-->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="${jdbc.driver}"></property>
        <property name="jdbcUrl" value="${jdbc.url}"></property>
        <property name="user" value="${jdbc.username}"></property>
        <property name="password" value="${jdbc.password}"></property>
    </bean>

    <!--配置sessionFactory-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"></property>
        <!--加载mybatis核心文件-->
        <property name="configLocation" value="classpath:sqlMapConfig.xml"></property>
    </bean>

    <!--扫描mapper所在的包 为mapper创建实现类-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.itheima.mapper"></property>
    </bean>


  
    <!--平台事务管理器-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>

	<!--开启事务注解支持-->
	    <tx:annotation-driven/>
</beans>

六、编写jdbc.properties配置文件

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/test
jdbc.username=root
jdbc.password=root

jdbc.driver:注册驱动
jdbc.url:数据库地址
jdbc.username:数据库用户名需要改成你自己的数据库用户名。
jdbc.password:数据库密码需要改成你自己的数据库密码。

七、编写sqlMapConfig.xml（mybaties主配置文件）

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
 <!--解决数据库字段为单词之间为"_",pojo中为驼峰命名  -->
    <settings>
        <setting name="mapUnderscoreToCamelCase" value="true"/>
    </settings>
    <plugins>
        <!-- com.github.pagehelper 为 PageHelper 类所在包名 -->
        <!-- 分页插件助手 -->
        <plugin interceptor="com.github.pagehelper.PageHelper">
            <!-- 设置数据库类型 Oracle,Mysql,MariaDB,SQLite,Hsqldb,PostgreSQL 六种数据库-->
            <property name="dialect" value="mysql"/>
        </plugin>
    </plugins>

八、编写controller

package com.huawei.controller;

import com.huawei.domain.Account;
import com.huawei.service.AccountService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import java.util.List;

@Controller
@RequestMapping(value = "/account",produces = "text/html;charset=utf-8")
public class AccountController {
    @Autowired
    private AccountService accountService;

 	/**
     * 新增
     * @param account
     * @return
     */
    @RequestMapping("/save")
    @ResponseBody
    public String save(Account account){
        accountService.add(account);
        return "保存成功";
    }


	/**
     * 查询所有
     * @return
     */
    @RequestMapping("/findAll") 
    @ResponseBody  //保证不跳转页面
    public List<Account> findAll(){
        List<Account> accountList = accountService.findAll();
        for (Account account : accountList) {
            System.out.println(account);
        }
        return accountList;
    }
}

@Controller 将本类创建为实例，并放到IOC容器中,还有@Component,@Service,@Repository作用都一致。只是为了见名知意Controller层采用了@Controller，Service层采用了@Service，Dao层采用了@Repository。@Component作为其他类实例创建用。

@RequestMapping(value = "/account",produces = "text/html;charset=utf-8"),springmvc提供的注解，用于映射地址。DispatcherServlet就是通过这个注解中的地址，来找到这个方法，访问并执行的。第一个参数：配置的方法的路径，第二个参数：配置的防止中文乱码。

@ResponseBody保证返回数据不跳转页面，同时保证返回数据为json格式。

@Autowired将创建的实体类从IOC注入到本类。

九、编写service接口

package com.huawei.service;

import com.huawei.domain.Account;

import java.util.List;

public interface AccountService {

    List<Account> findAll();

    void add(Account account);
}

十、编写service实现类

package com.huawei.service.impl;

import com.huawei.Mapper.AccountMapper;
import com.huawei.domain.Account;
import com.huawei.service.AccountService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;
@Service("accountService")
public class AccountServiceImpl implements AccountService {
    @Autowired
    private AccountMapper accountMapper;
    @Override
    public List<Account> findAll() {
        return accountMapper.findAll();
    }

    @Override
    public void add(Account account) {
        accountMapper.add(account);
    }
}

@Service上面已做讲解，service层主要用来实现业务逻辑。

十一、编写dao层

import java.util.List;
@Repository
public interface AccountMapper {
    @Select("select * from account")
    List<Account> findAll();
    @Insert("insert into account values (#{id},#{name},#{money})")
    void add(Account account);
}

十二、测试（只测试了查询）

ssm架构实例 ssm架构图_后端_04


测试通过。

下面是pojo文件：

package com.huawei.domain;

public class Account {
    private int id;
    private String name;
    private double money;

    public Account() {
    }

    public Account(int id, String name, double money) {
        this.id = id;
        this.name = name;
        this.money = money;
    }

    @Override
    public String toString() {
        return "Account{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", money=" + money +
                '}';
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public double getMoney() {
        return money;
    }

    public void setMoney(double money) {
        this.money = money;
    }
}

pom文件

<?xml version="1.0" encoding="UTF-8"?>

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.itheima</groupId>
    <artifactId>itheima_ssm</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>war</packaging>

    <name>itheima_ssm Maven Webapp</name>
    <!-- FIXME change it to the project's website -->
    <url>http://www.example.com</url>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>

    <dependencies>
        <!--spring相关-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.0.5.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.8.7</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.0.5.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>5.0.5.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>5.0.5.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.0.5.RELEASE</version>
        </dependency>

        <!--jackson-->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.9.6</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>2.9.0</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.9.6</version>
        </dependency>

        <!--commons-->
        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>2.4</version>
        </dependency>


        <!--servlet和jsp-->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <scope>provided</scope>
            <version>2.5</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>jsp-api</artifactId>
            <scope>provided</scope>
            <version>2.0</version>
        </dependency>

        <!--mybatis相关-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.4.5</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.3.1</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.6</version>
        </dependency>
        <dependency>
            <groupId>c3p0</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.1.2</version>
        </dependency>

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </dependency>
        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>

    </dependencies>

      <build>
          <plugins>
            <plugin>
              <groupId>org.apache.tomcat.maven</groupId>
              <artifactId>tomcat7-maven-plugin</artifactId>
              <version>2.2</version>
              <configuration>
                <port>8080</port>
                <path>/</path>
              </configuration>
            </plugin>
              <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                  <source>1.8</source>
                  <target>1.8</target>
                  <encoding>UTF-8</encoding>
                </configuration>
              </plugin>
          </plugins>
        </build>
</project>

好了今天的ssm整合就说到这了。