SpringMVC学习

Spring整合MyBatis

为了更好的学习SpringMVC和MyBatis进行整合开发

整合的目标: 控制层采用SpringMVC 、持久层使用MyBatis实现

开发步骤:

a.需求分析

b.梳理整合思路

c.搭建开发环境

d.根据需求完成dao层、Service层、Controller层、测试界面的开发

a.需求分析

连接数据库,实现商品列表的查询

b.梳理整合思路




spring 连接mysql springmvc连接mysql_spring


  • 第一步:整合DAO层

MyBatis和Spring整合:

通过spring管理mapper接口

使用mapper的自动扫描mapper接口在spring的注册

  • 第二步:整合service层

通过spring管理service接口:

使用配置方式将service接口配置在spring配置文件中

实现事务管理

  • 第三步:整合springmvc

由于springmvc是是属于spring的模块 所以不需要整合 直接使用

c.搭建开发环境

导入相关的jar包:

包括spring 和springmvc相关的jar包、MyBaits相关的jar包

Mybatis-spring整合的jar包、数据库的驱动jar包、第三方数据库连接池驱动的jar包


<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/maven-v4_0_0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<groupId>com.guigu.springmvc</groupId>
	<artifactId>SpringMVC_MyBatis</artifactId>
	<packaging>war</packaging>
	<version>0.0.1-SNAPSHOT</version>
	<name>SpringMVC_MyBatis Maven Webapp</name>
	<url>http://maven.apache.org</url>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<spring-version>5.0.8.RELEASE</spring-version>
		<mybatis-version>3.4.6</mybatis-version>
		<log4j-version>1.2.17</log4j-version>
		<logging-version>1.2</logging-version>
		<mysql-version>5.1.6</mysql-version>
		<druid-version>1.1.10</druid-version>
		<jstl-version>1.2</jstl-version>
		<mybatis-spring-version>1.3.2</mybatis-spring-version>
	</properties>

	<dependencies>
		<!-- spring相关的jar包 -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-context</artifactId>
			<version>${spring-version}</version>
		</dependency>

		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-test</artifactId>
			<version>${spring-version}</version>
			<scope>test</scope>
		</dependency>

		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-aspects</artifactId>
			<version>${spring-version}</version>
		</dependency>

		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-jdbc</artifactId>
			<version>${spring-version}</version>
		</dependency>

		<!-- springMVC相关的jar包 -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-webmvc</artifactId>
			<version>${spring-version}</version>
		</dependency>

		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-web</artifactId>
			<version>${spring-version}</version>
		</dependency>

		<!-- MyBatis相关的jar包 -->
		<dependency>
			<groupId>org.mybatis</groupId>
			<artifactId>mybatis</artifactId>
			<version>${mybatis-version}</version>
		</dependency>

		<!-- spring整合mybatis必备的jar包 -->
		<dependency>
			<groupId>org.mybatis</groupId>
			<artifactId>mybatis-spring</artifactId>
			<version>${mybatis-spring-version}</version>
		</dependency>

		<!-- 日志相关的jar包 -->
		<dependency>
			<groupId>commons-logging</groupId>
			<artifactId>commons-logging</artifactId>
			<version>${logging-version}</version>
		</dependency>

		<dependency>
			<groupId>log4j</groupId>
			<artifactId>log4j</artifactId>
			<version>${log4j-version}</version>
		</dependency>

		<dependency>
			<groupId>org.slf4j</groupId>
			<artifactId>slf4j-log4j12</artifactId>
			<version>1.7.25</version>
			<scope>test</scope>
		</dependency>

		<!-- mysql驱动的jar包 -->
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>${mysql-version}</version>
		</dependency>

		<!-- 第三方数据库连接池相关jar包 -->
		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>druid</artifactId>
			<version>${druid-version}</version>
		</dependency>

		<!-- jstl相关的jar -->
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>jstl</artifactId>
			<version>${jstl-version}</version>
		</dependency>
 
	</dependencies>

	<build>
		<finalName>SpringMVC_MyBatis</finalName>
		<plugins>
			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-compiler-plugin</artifactId>
				<version>2.3.2</version>
				<configuration>
					<source>1.8</source>
					<target>1.8</target>
				</configuration>
			</plugin>
		</plugins>
	</build>
</project>


d.根据需求完成dao、Service、Controller、测试界面的开发

DAO层

目标: 使用Spring管理SqlSessionFactory 、Mapper

完成以下步骤:

a.导入db.properties文件(数据库连接配置文件)

b.导入log4j.properties日志文件

c.创建核心配置文件sqlMapConfig.xml,配置相关内容

d.使用逆向工程生成pojo类、mapper.java接口、mapper.xml配置文件

e.创建applicationContext-dao.xml配置文件,使用spring管理dao层

  • a.导入db.properties文件(数据库连接配置文件)


spring 连接mysql springmvc连接mysql_mvc_02


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


  • b.导入log4j.properties日志文件


spring 连接mysql springmvc连接mysql_xml_03


  • c.创建核心配置文件sqlMapConfig.xml,配置相关内容


spring 连接mysql springmvc连接mysql_springmvc连接mysql_04


  • d.使用逆向工程生成pojo类、mapper.java接口、mapper.xml配置文件


spring 连接mysql springmvc连接mysql_xml_05


  • e.创建applicationContext-dao.xml配置文件,使用spring管理dao层

applicationContext-dao.xml配置文件


<?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:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:mvc="http://www.springframework.org/schema/mvc"
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/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd">

	<!-- a.加载指定的配置文件:实现数据库连接 -->
	<context:property-placeholder location="classpath:config/db.properties" />
	<!-- 使用druid数据库连接池 -->
	<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
		init-method="init" destroy-method="close">
		<property name="driverClassName" value="${jdbc.driver}"></property>
		<property name="url" value="${jdbc.url}"></property>
		<property name="username" value="${jdbc.username}"></property>
		<property name="password" value="${jdbc.password}"></property>
	</bean>

	<!-- 
		b.配置sqlSessionFactory : 
		SqlSessionFactoryBean 需要配置两个属性: 
			配置数据库连接池:dataSource 
			配置加载mybatis的文件:configLocation 
	-->
	<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
		<!-- 配置数据库连接池 -->
		<property name="dataSource" ref="dataSource"></property>
		<!-- 配置加载mybatis的文件 -->
		<property name="configLocation" value="classpath:mybatis/SqlMapConfig.xml"></property>
	</bean>

	<!-- 
		c.定义mapper扫描器 :MapperScannerConfigurer 
		需要配置两个属性: 
			配置扫描包的路径信息:basePackage 
			配置sqlSessionFactory:sqlSessionFactoryBeanName 
	-->
	<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
		<!-- 配置扫描包的路径信息 -->
		<property name="basePackage" value="com.guigu.ssm.mapper"></property>
		<!-- 配置sqlSessionFactory -->
		<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
	</bean>
</beans>


spring 连接mysql springmvc连接mysql_spring 连接mysql_06


Services层

目标:

Service交给spring管理

spring对service进行事务管理

开发步骤:

a.配置applicationContext-service.xml文件

b.配置applicationContext-transaction.xml文件

c.编写Service接口和相应的ServiceImpl实现类

  • a.配置applicationContext-service.xml文件
<?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:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:mvc="http://www.springframework.org/schema/mvc"
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/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd">
 
	<!-- 配置相关的service,也可以不需要配置,直接通过注解的形式进行管理 -->
 
</beans>


  • b.配置applicationContext-transaction.xml文件

配置与事务相关的内容:


<?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:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:mvc="http://www.springframework.org/schema/mvc"
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/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd">

	<!-- 
		事务管理配置: 
		对mybatis操作数据库的事务进行控制,spring使用jdbc的事务控制类
		org.springframework.jdbc.datasource.DataSourceTransactionManager
	-->
	<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
		<!-- 配置数据源 -->
		<property name="dataSource" ref="dataSource"></property>
	</bean>
 
	<!-- 
		a.可以使用默认的配置
		<tx:annotation-driven/>
 	-->
 
 	<!-- 
 		b.手动配置 		
 	-->
 	<!-- 定义通知 -->
 	<tx:advice id="txAdvice" transaction-manager="transactionManager">
 		<tx:attributes>
 			<!-- 传播行为定义 -->
 			<tx:method name="save*" propagation="REQUIRED"/>
 			<tx:method name="delete*" propagation="REQUIRED"/>
 			<tx:method name="insert*" propagation="REQUIRED"/>
 			<tx:method name="update*" propagation="REQUIRED"/>
 			<tx:method name="find*" propagation="SUPPORTS" read-only="true"/>
 			<tx:method name="get*" propagation="SUPPORTS" read-only="true"/>
 			<tx:method name="select*" propagation="SUPPORTS" read-only="true"/>
 		</tx:attributes>
 	</tx:advice>
	<!-- 定义切面 -->
 	<aop:config>
 		<aop:advisor advice-ref="txAdvice" pointcut="execution (* com.guigu.ssm.service.impl.*.*(..))"/>
 	</aop:config>
</beans>


  • c.编写Service接口和相应的ServiceImpl实现类

此处为了测试商品管理相关的内容,以商品管理相关进行测试


ItemsService.java:
public interface ItemsService {
	// 查找所有项目信息
	public List<Items> findItemsList()throws Exception;
	
	// 根据id查找详细信息
	public Items findItemsById(Integer id)throws Exception;
	
	// 根据主键id修改信息
	public void updateItemsById(Integer id,Items item)throws Exception;
}


ItemsServiceImpl.java:
@Service("itemsService")
public class ItemsServiceImpl implements ItemsService{

	@Autowired
	private ItemsMapper itemsMapper;

	@Override
	public List<Items> findItemsList() throws Exception {
		List<Items> list = itemsMapper.selectByExampleWithBLOBs(null);
		// 打印数据进行验证
		System.out.println(list);
		return list;
	}

	@Override
	public Items findItemsById(Integer id) throws Exception {
		return itemsMapper.selectByPrimaryKey(id);
	}

	@Override
	public void updateItemsById(Integer id, Items item) throws Exception {
		// 一般是通过主键id进行修改,此处明确指定主键id
		item.setId(id);
		// 执行修改操作
		itemsMapper.updateByPrimaryKeyWithBLOBs(item);
	}
}


Action(Controller)

目的:

完成controller层的开发

完成相关配置文件的导入并编写测试代码

开发步骤:

a.创建springmvc.xml进行配置(完成扫描包路径配置和视图解析器的配置)

b.配置web.xml文件(加载spring容器、配置springMVC的前端控制器)

c.创建xxxController.java完成控制层代码编写

d.编写测试页面进行相关测试

  • a.创建springmvc.xml进行配置(完成扫描包路径配置和视图解析器的配置)
<?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:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:mvc="http://www.springframework.org/schema/mvc"
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/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd">
 
	<!-- 定义扫描包的路径 -->
	<context:component-scan base-package="com.guigu.ssm.controller,com.guigu.ssm.service.impl"></context:component-scan>
    <mvc:annotation-driven/>
 
    <!-- 配置视图解析器 -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    	<!-- 配置视图的前缀 -->
    	<property name="prefix" value="WEB-INF/jsp/"></property>
    	<!-- 配置视图的后缀 -->
    	<property name="suffix" value=".jsp"></property>
    </bean>

</beans>


  • b.配置web.xml文件(加载spring容器、配置springMVC的前端控制器)
<?xml version="1.0" encoding="UTF-8"?>
<web-app 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"
version="3.0">

	<display-name>Archetype Created Web Application</display-name>

	<!-- 加载spring容器 -->
	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>/WEB-INF/classes/spring/applicationContext-*.xml</param-value>
	</context-param>
	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>

	<!-- 配置SpringMVC的前端控制器 -->
	<servlet>
		<servlet-name>springmvc</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<init-param>
			<param-name>contextConfigLocation</param-name>
			<param-value>classpath:spring/springmvc.xml</param-value>
		</init-param>
	</servlet>

	<servlet-mapping>
		<servlet-name>springmvc</servlet-name>
		<url-pattern>*.action</url-pattern>
	</servlet-mapping>

</web-app>


  • c.创建xxxController.java完成控制层代码编写
@Controller
public class ItemsController {

	@Autowired
	private ItemsService itemsService;
	
	@RequestMapping("/queryItems")
	public ModelAndView queryItems() throws Exception {
		List<Items> list = itemsService.findItemsList();
		ModelAndView modelAndView = new ModelAndView();
		// 转发数据到指定页面
		modelAndView.addObject("itemList", list);
		// 在配置文件中指定了前缀和后缀,此处可以省略部分内容等价于WEB-INF/jsp/xxx/xxx.jsp
		modelAndView.setViewName("items/itemList");
		return modelAndView;
	}
}


  • d.编写测试页面进行相关测试
itemList.jsp:
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>查阅所有商品信息</title>
</head>
<body>
	<table border="1">
		<tr>商品信息一览</tr>
		<tr>
			<th>商品id</th>
			<th>商品名称</th>
			<th>商品价格</th>
			<th>商品描述</th>
			<th>生产日期</th>
			<th>操作</th>
		</tr>
		<c:forEach var="item" items="${itemList }">
			<tr>
				<td>${item.id }</td>
				<td>${item.name }</td>
				<td>${item.price }</td>
				<td>${item.detail }</td>
				<td>${item.createtime }</td>
				<td><a href="${pageContext.request.contextPath }/editItems.action?id=${item.id}">修改</a></td>
			</tr>
		</c:forEach>
	</table>
</body>
</html>


测试结果:

访问链接:http://localhost:8080/SpringMVC_MyBatis/queryItems.action,测试结果如下所示


spring 连接mysql springmvc连接mysql_spring 连接mysql_07