spring笔记4-事务管理

一.xml配置文件形式

通过转账案例,学习事务管理

1.建立数据库

2.编写entity

  1 package huguangqin.com.cnblogs.entity;
  2
  3 public class User {
  4      private Integer id;
  5      private String name;
  6      private Double money;
  7
  8     public User() {
  9          super();
 10      }
 11
 12     public User(Integer id, String name, Double money) {
 13          super();
 14          this.id = id;
 15          this.name = name;
 16          this.money = money;
 17      }
 18
 19     public Integer getId() {
 20          return id;
 21      }
 22
 23     public void setId(Integer id) {
 24          this.id = id;
 25      }
 26
 27     public String getName() {
 28          return name;
 29      }
 30
 31     public void setName(String name) {
 32          this.name = name;
 33      }
 34
 35     public Double getMoney() {
 36          return money;
 37      }
 38
 39     public void setMoney(Double money) {
 40          this.money = money;
 41      }
 42
 43 }
 44 

3.编写dao

  1 package huguangqin.com.cnblogs.dao;
  2
  3 public interface UserDao {
  4      void increasement(int id, double money);
  5
  6     void decreasement(int id, double money);
  7  }
  8 

4.编写daoImpl

  1 package huguangqin.com.cnblogs.daoImpl;
  2
  3 import org.springframework.jdbc.core.support.JdbcDaoSupport;
  4
  5 import huguangqin.com.cnblogs.dao.UserDao;
  6
  7 public class UserDaoImpl extends JdbcDaoSupport implements UserDao {
  8
  9     @Override
 10      public void increasement(int id, double money) {
 11          String sql = "update t_bank set money=money+? where id = ?";
 12          getJdbcTemplate().update(sql, money, id);
 13      }
 14
 15     @Override
 16      public void decreasement(int id, double money) {
 17          String sql = "update t_bank set money=money-? where id = ?";
 18          getJdbcTemplate().update(sql, money, id);
 19      }
 20
 21 }
 22 

5.编写service

  1 package huguangqin.com.cnblogs.service;
  2
  3 public interface IUserService {
  4      void tranfer(int where, int to, double money);
  5  }
  6 

6.编写serviceImpl

  1 package huguangqin.com.cnblogs.serviceImpl;
  2
  3 import org.springframework.beans.factory.annotation.Autowired;
  4
  5 import huguangqin.com.cnblogs.dao.UserDao;
  6  import huguangqin.com.cnblogs.service.IUserService;
  7
  8 public class UserServiceImpl implements IUserService {
  9      //调用UserDao操作数据库,spring下调用接口,并注入实例对象
 10     @Autowired
 11      private UserDao ud;
 12
 13     public void setUd(UserDao ud) {
 14          this.ud = ud;
 15      }
 16
 17     @Override
 18      public void tranfer(int where, int to, double money) {
 19         ud.decreasement(where, money);
 20          ud.increasement(to, money);
 21      }
 22  }
 23 

7.编写db.properties

  1 jdbc.driverClass=com.mysql.jdbc.Driver
  2 jdbc.url=jdbc:mysql:///spring_day02
  3 jdbc.user=root
  4 jdbc.password=root

8.编写applicationContext.xml

  1 <?xml version="1.0" encoding="UTF-8"?>
  2
  3 <beans
  4  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  5  xmlns="http://www.springframework.org/schema/beans"
  6  xmlns:context="http://www.springframework.org/schema/context"
  7  xmlns:aop="http://www.springframework.org/schema/aop"
  8  xmlns:tx="http://www.springframework.org/schema/tx"
  9  xsi:schemaLocation="http://www.springframework.org/schema/beans
 10                      http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
 11                      http://www.springframework.org/schema/context
 12                      http://www.springframework.org/schema/context/spring-context-4.2.xsd
 13                      http://www.springframework.org/schema/aop
 14                      http://www.springframework.org/schema/aop/spring-aop-4.2.xsd
 15                      http://www.springframework.org/schema/tx
 16                      http://www.springframework.org/schema/tx/spring-tx-4.2.xsd ">
 17
 18  <!--读取db.propertiey  -->
 19  <context:property-placeholder location="classpath:db.properties"/>
 20
 21 <!-- 配置连接池到spring容器 -->
 22  <bean name="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
 23      <property name="driverClass" value="${jdbc.driverClass}"></property>
 24      <property name="jdbcUrl" value="${jdbc.url}"></property>
 25      <property name="user" value="${jdbc.user}"></property>
 26      <property name="password" value="${jdbc.password}"></property>
 27  </bean>
 28
 29 <!-- 配置核心事务管理器 -->
 30  <bean name="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
 31      <property name="dataSource" ref="dataSource"></property>
 32  </bean>
 33
 34 <!-- 配置事务管理通知 -->
 35  <tx:advice id="txAdvice" transaction-manager="transactionManager">
 36      <tx:attributes>
 37          <tx:method name="*" isolation="DEFAULT" propagation="REQUIRED" read-only="false"/>
 38          <tx:method name="save*" isolation="DEFAULT" propagation="REQUIRED" read-only="false"/>
 39          <tx:method name="find*" isolation="DEFAULT" propagation="REQUIRED" read-only="true"/>
 40      </tx:attributes>
 41  </tx:advice>
 42
 43 <!-- 配置织入 -->
 44  <aop:config>
 45      <aop:pointcut expression="execution(* huguangqin.com.cnblogs.serviceImpl.*ServiceImpl.*(..))" id="txPc"/>
 46  </aop:config>
 47
 48 <!-- 配置dao -->
 49  <bean name="userDao" class="huguangqin.com.cnblogs.daoImpl.UserDaoImpl">
 50      <property name="dataSource" ref="dataSource"></property>
 51  </bean>
 52
 53 <!-- 配置service -->
 54  <bean name="userService" class="huguangqin.com.cnblogs.serviceImpl.UserServiceImpl">
 55      <property name="ud" ref="userDao"></property>
 56  </bean>
 57  </beans>
 58 

二.Annotation形式

与xml相比需修改以下文件

1.applicationContext.xml

  1 <?xml version="1.0" encoding="UTF-8"?>
  2
  3 <beans
  4  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  5  xmlns="http://www.springframework.org/schema/beans"
  6  xmlns:context="http://www.springframework.org/schema/context"
  7  xmlns:aop="http://www.springframework.org/schema/aop"
  8  xmlns:tx="http://www.springframework.org/schema/tx"
  9  xsi:schemaLocation="http://www.springframework.org/schema/beans
 10                      http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
 11                     http://www.springframework.org/schema/context
 12                      http://www.springframework.org/schema/context/spring-context-4.2.xsd
 13                      http://www.springframework.org/schema/aop
 14                      http://www.springframework.org/schema/aop/spring-aop-4.2.xsd
 15                      http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.2.xsd ">
 16
 17  <!--读取db.propertiey  -->
 18  <context:property-placeholder location="classpath:db.properties"/>
 19
 20 <!-- 配置连接池到spring容器 -->
 21  <bean name="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
 22      <property name="driverClass" value="${jdbc.driverClass}"></property>
 23      <property name="jdbcUrl" value="${jdbc.url}"></property>
 24      <property name="user" value="${jdbc.user}"></property>
 25      <property name="password" value="${jdbc.password}"></property>
 26 </bean>
 27
 28 <!-- 配置核心事务管理器 -->
 29  <bean name="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
 30      <property name="dataSource" ref="dataSource"></property>
 31  </bean>
 32
 33 <!--开启注解管理事务开关  -->
 34  <tx:annotation-driven transaction-manager="transactionManager"/>
 35
 36 <!-- 配置dao -->
 37  <bean name="userDao" class="huguangqin.com.cnblogs.daoImpl.UserDaoImpl">
 38      <property name="dataSource" ref="dataSource"></property>
 39  </bean>
 40
 41 <!-- 配置service -->
 42  <bean name="userService" class="huguangqin.com.cnblogs.serviceImpl.UserServiceImpl">
 43      <property name="ud" ref="userDao"></property>
 44  </bean>
 45  </beans>
 46 

2.serviceImpl类

  1 package huguangqin.com.cnblogs.serviceImpl;
  2
  3 import org.springframework.beans.factory.annotation.Autowired;
  4  import org.springframework.transaction.annotation.Transactional;
  5
  6 import huguangqin.com.cnblogs.dao.UserDao;
  7  import huguangqin.com.cnblogs.service.IUserService;
  8
  9 @Transactional
 10  public class UserServiceImpl implements IUserService {
 11      @Autowired
 12      private UserDao ud;
 13
 14     public UserDao getUd() {
 15          return ud;
 16      }
 17
 18     public void setUd(UserDao ud) {
 19          this.ud = ud;
 20      }
 21
 22     @Override
 23      // @Transactional(isolation = Isolation.DEFAULT, propagation =Propagation.REQUIRED, readOnly = false)
 24      public void tranfer(int where, int to, double money) {
 25          ud.decreasement(where, money);
 26          ud.increasement(to, money);
 27      }
 28
 29 }
 30