spring 08整合mybatis02事物管理

我就是我 2022-04-16 04:35 204阅读 0赞

public void test(User user){
       	userDao.add(user);
       	userDao.delete(user);
       }

test方法内有增加数据和删除数据方法，如果不加事物管理。那么当delete方法失败时，add方法数据依然可以插入到数据库。如果想达到一致性效果。可以使用事物管理来保证一致性。

第一步 增加maven依赖  
pom.xml

<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>org.spring08</groupId>
    	<artifactId>spring08_mybatis02_transaction</artifactId>
    	<version>0.0.1-SNAPSHOT</version>
    
    	<dependencies>
    		<dependency>
    			<groupId>org.springframework</groupId>
    			<artifactId>spring-core</artifactId>
    			<version>4.3.2.RELEASE</version>
    		</dependency>
    		<dependency>
    			<groupId>org.springframework</groupId>
    			<artifactId>spring-context</artifactId>
    			<version>4.3.2.RELEASE</version>
    		</dependency>
    		<dependency>
    			<groupId>org.springframework</groupId>
    			<artifactId>spring-test</artifactId>
    			<version>4.3.2.RELEASE</version>
    		</dependency>
    		<dependency>
    			<groupId>org.springframework</groupId>
    			<artifactId>spring-tx</artifactId>
    			<version>4.3.2.RELEASE</version>
    		</dependency>
    		<dependency>
    			<groupId>org.springframework</groupId>
    			<artifactId>spring-beans</artifactId>
    			<version>4.3.2.RELEASE</version>
    		</dependency>
    		<dependency>
    			<groupId>org.springframework</groupId>
    			<artifactId>spring-jdbc</artifactId>
    			<version>4.3.2.RELEASE</version>
    		</dependency>
    		<dependency>
    			<groupId>org.aspectj</groupId>
    			<artifactId>aspectjweaver</artifactId>
    			<version>1.7.4</version>
    		</dependency>
    		<dependency>
    			<groupId>org.mybatis</groupId>
    			<artifactId>mybatis</artifactId>
    			<version>3.2.7</version>
    		</dependency>
    		<dependency>
    			<groupId>org.mybatis</groupId>
    			<artifactId>mybatis-spring</artifactId>
    			<version>1.2.2</version>
    		</dependency>
    		<dependency>
    			<groupId>mysql</groupId>
    			<artifactId>mysql-connector-java</artifactId>
    			<version>5.0.8</version>
    		</dependency>
    	</dependencies>
    </project>

第二步 创建User对象  
User.java

package org.spring08.vo;
    
    public class User { 
    	private Integer id;
    	private String name;
    
    	public Integer getId() { 
    		return id;
    	}
    
    	public void setId(Integer id) { 
    		this.id = id;
    	}
    
    	public String getName() { 
    		return name;
    	}
    
    	public void setName(String name) { 
    		this.name = name;
    	}
    }

第三步 创建sql描述文件  
user.mapper.xml 该文件在根目录下:src/main/java/user.mapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
    <!DOCTYPE mapper 
    PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" 
    "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
    
    <mapper namespace="org.spring08.mapper">
    
    	
        <select id="selectUserList" parameterType="user" resultType="user">
            select id,name from user 
        </select>
        
        
        <insert id="insertUser" parameterType="org.spring08.vo.User" >
            insert into user(id,name) values(#{id},#{name})
        </insert>
    	
        <delete id="deleteUser" parameterType="org.spring08.vo.User" >
           
           123delete from user  where name=#{name}
        </delete>
    </mapper>

第四步 创建UserDao接口  
User.java

package org.spring08.dao;
    
    import java.util.List;
    
    import org.spring08.vo.User;
    
    public interface UserDao { 
    	List<User>  select(User user);
    	void add(User user);
    	void delete(User user);
    }

第五步 创建UserDaoImpl 该类实现User接口  
userDaoImpl.java

package org.spring08.dao.impl;
    
    import java.util.List;
    
    import org.mybatis.spring.SqlSessionTemplate;
    import org.spring08.vo.User;
    import org.spring08.dao.UserDao;
    
    public class UserDaoImpl implements UserDao { 
    	private SqlSessionTemplate sqlSession;
    
    	public List<User> select(User user) { 
    		List<User> list = sqlSession.selectList("selectUserList", user);
    		return list;
    
    	}
    
    	public void setSqlSession(SqlSessionTemplate sqlSession) { 
    		this.sqlSession = sqlSession;
    	}
    
    	public void add(User user) { 
    		sqlSession.insert("insertUser", user);
    
    
    	}
    
    	public void delete(User user) { 
    		sqlSession.delete("deleteUser", user);
    		
    
    	}
    
    }

第六步 创建 UserService。  
userServies.java

package org.spring08.service;
    
    import java.util.List;
    
    import org.spring08.dao.UserDao;
    import org.spring08.vo.User;
    
    public class UserService { 
    
    	UserDao userDao;
    	public void setUserDao(UserDao userDao) { 
    		this.userDao = userDao;
    	}
    
    	
    	public void test(User user){ 
    		userDao.add(user);
    		userDao.delete(user);
    	}
    
    	public List<User> select(User user) { 
    		return userDao.select(null);
    	}
    
    }

第七步 创建mybatis配置文件  
mybatis.cfg.xml 该文件在根目录下：src/main/java/mybatis.cfg.xml

<?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>
    	<typeAliases>
    		
    		<typeAlias type="org.spring08.vo.User" alias="user"/>
    	</typeAliases>
    	<mappers>
    		
    		<mapper resource="org/spring08/vo/user.mapper.xml"/>
    	</mappers>
    </configuration>

第八步 创建spring配置文件  
beans.xml 该文件在根目录下:src/main/java/beans.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:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
    
    	
    	<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
    		<property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
    		<property name="url" value="jdbc:mysql://127.0.0.1:3306/test"></property>
    		<property name="username" value="root"></property>
    		<property name="password" value="root"></property>
    	</bean>
    	
    	
    	<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    		<property name="dataSource" ref="dataSource"/>
    		
    		<property name="configLocation" value="classpath:mybatis.cfg.xml"/>
    	</bean>
    	
    	
    	
    	
    	<bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    		<property name="dataSource" ref="dataSource"/>
    	</bean>
    	
    	<tx:advice id="txAdvice" transaction-manager="txManager">
    		<tx:attributes>
    			
    			<tx:method name="add" propagation="REQUIRED"/>
    			<tx:method name="insert" propagation="REQUIRED"/>
    			<tx:method name="update" propagation="REQUIRED"/>
    			<tx:method name="delete" propagation="REQUIRED"/>
    			<tx:method name="test" propagation="REQUIRED"/>
    			
    			<tx:method name="get" read-only="true"/>
    		</tx:attributes>
    	
    	</tx:advice>
    	<aop:config>
    		
    		<aop:pointcut expression="execution(* org.spring08.service.*.test(..))" id="pointcut"/>
    		<aop:advisor advice-ref="txAdvice" pointcut-ref="pointcut"/>
    	</aop:config>
    	
    	
    	
    	<bean id="sqlSessionTemplate" class="org.mybatis.spring.SqlSessionTemplate">
    		<constructor-arg index="0" ref="sqlSessionFactory"/>
    	</bean>
    
    	
    	<bean id="userDao" class="org.spring08.dao.impl.UserDaoImpl">
    		<property name="sqlSession" ref="sqlSessionTemplate"/>   
    	</bean>
    	
    	<bean id="userService" class="org.spring08.service.UserService">
    		<property name="userDao" ref="userDao"></property>
    	</bean>
    	
    </beans>

tx:method name:表示哪些方法进行事物管理  
tx:method propagation:表示事物通知类型  
tx:method propagation REQUIRED:每次检查是否有新的事物，如果没有事物，开启新的事物。  
tx:method read-only=“tru”:不开启事物，只读模式

aop:pointcut expression="execution(\* org.spring08.service.\*.test(…)) ：表示哪些业务方法使用事物管理（表示UserService类下test使用事物，其他方法不使用事物。并且需要配置 <tx:method name=“test” propagation=“REQUIRED”/>。两个地方同时配置才会生效 ）

最后一步 测试

package org.spring08.test;
    
    import java.util.List;
    
    import org.spring08.dao.UserDao;
    import org.spring08.service.UserService;
    import org.spring08.vo.User;
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    
    public class Test { 
    	public static void main(String[] args) { 
    
    		ApplicationContext app=new ClassPathXmlApplicationContext("beans.xml");
    		UserService userService=(UserService)app.getBean("userService");
    		User user =new User();
    		user.setId(100);
    		user.setName("hello");
    		userService.test(user);
    		List<User> list=userService.select(null);
    		for(User u:list){ 
    			System.out.println("id:"+u.getId()+" name:"+u.getName());
    		}
    	}
    }

由于UserService.test里面的delete方法会抛出异常。当发生异常时add方法不会进行提交。