6. Integrate Spring

MyBatis-Spring will help you seamlessly integrate MyBatis code into Spring. It will allow MyBatis to participate in Spring's transaction management, create mapper mapper and SqlSession and inject them into beans, and convert Mybatis exceptions to Spring's DataAccessException. Ultimately, it is possible to make application code independent of MyBatis, Spring or MyBatis-Spring.

6.1 Integrate Spring - import all required jar packages

pom.xml

<!-- DB连接池 -->
<dependency>
    <groupId>com.mchange</groupId>
    <artifactId>c3p0</artifactId>
    <version>0.9.5.5</version>
</dependency>

<!-- JSP -->
<dependency>
	<groupId>javax.servlet</groupId>
	<artifactId>jstl</artifactId>
	<version>1.2</version>
</dependency>

<dependency>
	<groupId>javax.servlet</groupId>
	<artifactId>javax.servlet-api</artifactId>
	<version>3.1.0</version>
	<scope>provided</scope>
</dependency>

<dependency>
	<groupId>javax.servlet.jsp</groupId>
	<artifactId>jsp-api</artifactId>
	<version>2.1</version>
	<scope>provided</scope>
</dependency>

<!-- 用于整合Spring -->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context</artifactId>
    <version>${springframework.version}</version>
</dependency>

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

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

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

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

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

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

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

6.2. Integrate Spring - configuration before introducing MyBatis

mybatis-config.xml

<configuration>
	<settings>
		<setting name="mapUnderscoreToCamelCase" value="true"/>
		<!--显示的指定每个我们需要更改的配置的值，即使他是默认的。防止版本更新带来的问题  -->
		<setting name="lazyLoadingEnabled" value="true"/>
		<setting name="aggressiveLazyLoading" value="false"/>
		<setting name="cacheEnabled" value="true"/>
	</settings>
</configuration>

EmployeeMapper.xml

<mapper namespace="club.coderhome.c06.spring.EmployeeMapper">

 	<select id="getEmpById" resultType="club.coderhome.c01.helloworld.bean.Employee">
		select * from employee where id = #{id}
	</select>
	
 	<select id="getEmps" resultType="club.coderhome.c01.helloworld.bean.Employee">
		select * from employee
	</select>
</mapper>

EmployeeMapper

public interface EmployeeMapper {
    
    

	public Employee getEmpById(Integer id);

	public List<Employee> getEmps();
	
}
1234567

6.3. Integrate Spring-SpringMVC configuration file writing

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app ...>
  <!--Spring配置： needed for ContextLoaderListener -->
	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>classpath:applicationContext.xml</param-value>
	</context-param>

	<!-- Bootstraps the root web application context before servlet initialization -->
	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>
	
	<!-- SpringMVC配置 -->
	<!-- The front controller of this Spring Web application, responsible for handling all application requests -->
	<servlet>
		<servlet-name>spring</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<load-on-startup>1</load-on-startup>
	</servlet>

	<!-- Map all requests to the DispatcherServlet for handling -->
	<servlet-mapping>
		<servlet-name>spring</servlet-name>
		<url-pattern>/</url-pattern>
	</servlet-mapping>
  
</web-app>

spring-servlet.xml

<beans ...">

	<!--SpringMVC只是控制网站跳转逻辑  -->
	<!-- 只扫描控制器 -->
	<context:component-scan base-package="club.coderhome.c06" use-default-filters="false">
		<context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
	</context:component-scan>
	
	<!-- 视图解析器 -->
	<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="prefix" value="/WEB-INF/pages/"></property>
		<property name="suffix" value=".jsp"></property>
	</bean>
	
	<mvc:annotation-driven></mvc:annotation-driven>
	<mvc:default-servlet-handler/>
</beans>

6.4. Integrate Spring-Spring configuration file writing

applicationContext.xml

<beans ...>

	<!-- Spring希望管理所有的业务逻辑组件，等。。。 -->
	<context:component-scan base-package="club.coderhome.c06">
		<context:exclude-filter type="annotation"
			expression="org.springframework.stereotype.Controller" />
	</context:component-scan>

	<!-- 引入数据库的配置文件 -->
	<context:property-placeholder location="classpath:c04/dbconfig.properties" />
	<!-- Spring用来控制业务逻辑。数据源、事务控制、aop -->
	<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
		<property name="jdbcUrl" value="${jdbc.url}"></property>
		<property name="driverClass" value="${jdbc.driver}"></property>
		<property name="user" value="${jdbc.username}"></property>
		<property name="password" value="${jdbc.password}"></property>
	</bean>
	<!-- spring事务管理 -->
	<bean id="dataSourceTransactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
		<property name="dataSource" ref="dataSource"></property>
	</bean>

	<!-- 开启基于注解的事务 -->
	<tx:annotation-driven transaction-manager="dataSourceTransactionManager"/>
	...

6.5. Integrate Spring-Spring Integrate MyBatis key configuration

applicationContext.xml

	...
	<!-- 
	整合mybatis 
		目的：1、spring管理所有组件。mapper的实现类。
				service==>Dao   @Autowired:自动注入mapper；
			2、spring用来管理事务，spring声明式事务
	-->
	<!--创建出SqlSessionFactory对象  -->
	<bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">
		<property name="dataSource" ref="dataSource"></property>
		<!-- configLocation指定全局配置文件的位置 -->
		<property name="configLocation" value="classpath:c06/mybatis-config.xml"></property>
		<!--mapperLocations: 指定mapper文件的位置-->
		<property name="mapperLocations" value="classpath:c06/*Mapper.xml"></property>
	</bean>
	
	<!--配置一个可以进行批量执行的sqlSession  -->
	<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
		<constructor-arg name="sqlSessionFactory" ref="sqlSessionFactoryBean"></constructor-arg>
		<constructor-arg name="executorType" value="BATCH"></constructor-arg>
	</bean>
	
	<!-- 扫描所有的mapper接口的实现，让这些mapper能够自动注入；
	base-package：指定mapper接口的包名
	 -->
	<mybatis-spring:scan base-package="club.coderhome.c06"/>
	<!-- <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
		<property name="basePackage" value="club.coderhome.dao"></property>
	</bean> -->
	
</beans>

6.6. Integrating Spring-integration testing

EmployeeController.java

@Controller
public class EmployeeController implements Serializable{
    
    

	private static final long serialVersionUID = -5415910268862124882L;
	
	@Autowired
	EmployeeService employeeService;
	
	@RequestMapping("/getemps")
	public String emps(Map<String,Object> map){
    
    
		List<Employee> emps = employeeService.getEmps();
		map.put("allEmps", emps);
		return "list";
	}
}

EmployeeService.java

@Service
public class EmployeeService {
    
    

	@Autowired
	private EmployeeMapper employeeMapper;
	
	@Autowired
	private SqlSession sqlSession;
	
	public List<Employee> getEmps(){
    
    
		//
		//EmployeeMapper mapper = sqlSession.getMapper(EmployeeMapper.class);
		return employeeMapper.getEmps();
	}

}

list.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!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>员工列表</title>
</head>
<body>
	<table>
			<tr>
				<td>id</td>
				<td>lastName</td>
				<td>email</td>
				<td>gender</td>
			</tr>
		<c:forEach items="${allEmps}" var="emp">
			<tr>
				<td>${emp.id}</td>
				<td>${emp.lastName}</td>
				<td>${emp.email}</td>
				<td>${emp.gender}</td>
			</tr>
		</c:forEach>
	
	</table>

</body>
</html>

http://localhost:8080/mybatis/getempsFinally, test by typing in the browser

6. Integrate Spring

6. Integrate Spring

6.1 Integrate Spring - import all required jar packages

6.2. Integrate Spring - configuration before introducing MyBatis

6.3. Integrate Spring-SpringMVC configuration file writing

6.4. Integrate Spring-Spring configuration file writing

6.5. Integrate Spring-Spring Integrate MyBatis key configuration

6.6. Integrating Spring-integration testing

Guess you like