Spring事务

DataSourceTransactionManager           JDBC事务管理器
HibernateTransactionManager            Hibernate事务管理器
JdoTransactionManager                  JDO事务管理器
JtaTransactionManager                   JTA事务管理器      
PersistenceBrokerTransactionManager    Apache的OJB事务管理器   

 

JDBC事例

<?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:context="http://www.springframework.org/schema/context"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xsi:schemaLocation="     
          http://www.springframework.org/schema/beans     
          http://www.springframework.org/schema/beans/spring-beans-3.0.xsd     
          http://www.springframework.org/schema/context     
          http://www.springframework.org/schema/context/spring-context-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/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd"
    default-autowire="byName">

    <context:annotation-config />    
    <context:component-scan base-package="bupt.transaction" />
    <tx:annotation-driven transaction-manager="txManager"/>
    
    <context:property-placeholder location="jdbc.properties"/>
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" 
        destroy-method="close">
        <property name="driverClassName" value="${jdbc.driverClassName}"/>
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
    </bean>
    
    <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>
</beans>

package bupt.transaction;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;

import javax.sql.DataSource;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowMapper;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;

@Transactional
@Repository
public class StudentDaoImpl implements StudentDao {
    private JdbcTemplate jdbcTemplate;
    
    @Autowired
    public void init(@Qualifier("dataSource") DataSource dataSource){
        this.jdbcTemplate = new JdbcTemplate(dataSource);
    }
    
    @Transactional(propagation=Propagation.NOT_SUPPORTED)
    @Override
    public void insert(Student s) {
        // TODO Auto-generated method stub
        String sql = "insert into student values (?,?,?)";
        jdbcTemplate.update(sql, new Object[]{s.getId(),s.getName(),s.getAge()});
    }

    @Override
    public Student query(int id) {
        // TODO Auto-generated method stub
        String sql = "select id,name,age from student where id = ?";
        return (Student) jdbcTemplate.queryForObject(sql, new Object[]{id}, new RowMapper(){

            @Override
            public Object mapRow(ResultSet rs, int rowNum) throws SQLException {
                // TODO Auto-generated method stub
                System.out.println("rowNum=" + rowNum);
                
                Student student = new Student();
                student.setId(rs.getInt("id"));
                student.setName(rs.getString("name"));
                student.setAge(rs.getString("age"));
                
                return student;
            }});
    }

    @Override
    public void delete(int id) {
        // TODO Auto-generated method stub
        String sql = "delete from student where id = ?";
        jdbcTemplate.update(sql, new Object[]{id});
    }

    @Override
    public void deleteAll() {
        // TODO Auto-generated method stub
        String sql = "delete from student";
        jdbcTemplate.execute(sql);
    }

    @Override
    public List<Student> queryList() {
        // TODO Auto-generated method stub
        String sql = "select id,name,age from student";
        List<Student> list = jdbcTemplate.query(sql, new RowMapper(){

            @Override
            public Object mapRow(ResultSet rs, int rowNum) throws SQLException {
                // TODO Auto-generated method stub
                System.out.println("rowNum=" + rowNum);
                
                Student student = new Student();
                student.setId(rs.getInt("id"));
                student.setName(rs.getString("name"));
                student.setAge(rs.getString("age"));
                
                return student;
            }});
        
        return list;
    }

}

 

事物传播行为: 
@Transactional(propagation=Propagation.REQUIRED) 
如果有事务, 那么加入事务, 没有的话新建一个(默认情况下)

@Transactional(propagation=Propagation.NOT_SUPPORTED) 
容器不为这个方法开启事务

@Transactional(propagation=Propagation.REQUIRES_NEW) 
不管是否存在事务,都创建一个新的事务,原来的挂起,新的执行完毕,继续执行老的事务

@Transactional(propagation=Propagation.MANDATORY) 
必须在一个已有的事务中执行,否则抛出异常

@Transactional(propagation=Propagation.NEVER) 
必须在一个没有的事务中执行,否则抛出异常(与Propagation.MANDATORY相反)

@Transactional(propagation=Propagation.SUPPORTS) 
如果其他bean调用这个方法,在其他bean中声明事务,那就用事务.如果其他bean没有声明事务,那就不用事务.

 

事物超时设置:
@Transactional(timeout=30) //默认是30秒

 

事务隔离级别:
@Transactional(isolation = Isolation.READ_UNCOMMITTED)
读取未提交数据(会出现脏读, 不可重复读) 基本不使用

@Transactional(isolation = Isolation.READ_COMMITTED)
读取已提交数据(会出现不可重复读和幻读)

@Transactional(isolation = Isolation.REPEATABLE_READ)
可重复读(会出现幻读)

@Transactional(isolation = Isolation.SERIALIZABLE)

串行化