使用spring jdbcTemplate和dbcp操作数据库及事务配置
代码结构及jar包
ServiceClass.java
package com.orange.test;
import java.sql.Types;
import java.util.List;
import javax.annotation.PostConstruct;
import javax.management.RuntimeErrorException;
import javax.sql.DataSource;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;
@Service
@Transactional //增加事务
public class ServiceClass {
@Autowired //注入dataSource属性
private DataSource dataSource;
private JdbcTemplate jdbcTemplate;
public void setDataSource(DataSource dataSource) {
this.dataSource = dataSource;
}
//实例化ServiceClass类后执行init()方法初始化jdbcTemplate
@PostConstruct
public void init(){
System.out.println("初始化jdbcTemplate");
this.jdbcTemplate = new JdbcTemplate(dataSource);
}
@Transactional(propagation=Propagation.REQUIRED) //默认事务，可以不写
public void save(){
jdbcTemplate.update("insert into spring (name) value(?)", new Object[]{"sa"},new int[]{ Types.VARCHAR});
}
@Transactional(propagation=Propagation.REQUIRED) //默认事务，可以不写
public void update(){
jdbcTemplate.update("update spring set name = ? where id = ?", new Object[]{"A",1},new int[]{ Types.VARCHAR,Types.INTEGER});
}
/**
* 默认只对unchecked异常有效
* Error和RuntimeException及其子类成为未检查异常（unchecked）
* 其它异常成为已检查异常（checked）
*/
@Transactional(rollbackFor=Exception.class)
public void delete() throws Exception{
jdbcTemplate.update("delete from spring where id = ?", new Object[]{11},new int[]{Types.INTEGER});
// System.out.println(1/0); //运行异常
throw new Exception("异常");
}
public String getData(){
return (String)jdbcTemplate.queryForObject("select * from spring where id = ?", new Object[]{1},new int[]{Types.INTEGER}, new TestRowMapper());
}
/**
* 第一方法种查询所有
*/
@Transactional(propagation=Propagation.NOT_SUPPORTED) //不启用事务
public List<String> getAll(){
return (List<String>)jdbcTemplate.query("select * from spring ",new TestRowMapper());
}
/**
* 第二方法种查询所有
*/
@Transactional(propagation=Propagation.NOT_SUPPORTED) //不启用事务
public List<String> getAllList(){
return (List<String>)jdbcTemplate.queryForList("select * from spring ");
}
}
TestRowMapper.java
package com.orange.test;
import java.sql.ResultSet;
import java.sql.SQLException;
import org.springframework.jdbc.core.RowMapper;
public class TestRowMapper implements RowMapper{
public Object mapRow(ResultSet rs, int arg1) throws SQLException {
String name = rs.getString("name");
return name;
}
}
Test.java
package com.orange.test;
import java.util.List;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class Test {
public static void main(String[] args) {
ApplicationContext context1 = new ClassPathXmlApplicationContext("beans.xml");
ServiceClass service= (ServiceClass)context1.getBean("serviceClass");
// service.save();
List<String> list = service.getAll();
System.out.println(list);
List<String> list2 = service.getAllList();
System.out.println(list2);
//执行删除
try {
service.delete();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// list = service.getAll();
// System.out.println(list);
}
}
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: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-2.5.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">
<!-- 对 com.orange.test 下的类扫描交给spring管理-->
<context:component-scan base-package="com.orange.test"></context:component-scan>
<!-- 指定spring jdbc属性文件位置 -->
<context:property-placeholder location="classpath:jdbc.properties"/>
<!-- 数据源 -->
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="${driverClassName}"/>
<property name="url" value="${url}"/>
<property name="username" value="${username}"/>
<property name="password" value="${password}"/>
<!--initialSize: 初始化连接-->
<property name="initialSize" value="5"/>
<!--maxIdle: 最大空闲连接-->
<property name="maxIdle" value="10"/>
<!--minIdle: 最小空闲连接-->
<property name="minIdle" value="5"/>
<!--maxActive: 最大连接数量-->
<property name="maxActive" value="15"/>
<!--removeAbandoned: 是否自动回收超时连接-->
<property name="removeAbandoned" value="true"/>
<!--removeAbandonedTimeout: 超时时间(以秒数为单位)-->
<property name="removeAbandonedTimeout" value="180"/>
<!--maxWait: 超时等待时间以毫秒为单位 6000毫秒/1000等于60秒-->
<property name="maxWait" value="3000"/>
<!-- 用来验证从连接池取出的连接,在将连接返回给调用者之前.如果指定,则查询必须是一个SQL SELECT并且必须返回至少一行记录 -->
<property name="validationQuery">
<value>SELECT 1</value>
</property>
</bean>
<!-- spring使用的管理器 -->
<bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>
<!-- 使用注解配置spring事务 -->
<tx:annotation-driven transaction-manager="txManager"/>
</beans>
jdbc.properties
driverClassName=com.mysql.jdbc.Driver url=jdbc:mysql://localhost:3306/dbname?useUnicode=true&characterEncoding=UTF-8 username=root password=123456以上是使用注解的方式配置事务，如要要使用xml配置只需在beans.xml增加：
<!-- 定义切面类，需要使用事务 -->
<aop:config>
<aop:pointcut id="transactionPointcut" expression="execution(* com.orange.test.ServiceClass.*(..))"/>
<aop:advisor advice-ref="txAdvice" pointcut-ref="transactionPointcut"/>
</aop:config>
<tx:advice id="txAdvice" transaction-manager="txManager">
<tx:attributes>
<!-- 方法名是get开头的不适用事务 -->
<tx:method name="get*" read-only="true" propagation="NOT_SUPPORTED"/>
<!-- 其实使用默认事务 -->
<tx:method name="*"/>
</tx:attributes>
</tx:advice>