Spring_database_Template

配置applicationContext.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/context http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-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">

<!--自动装箱-->
<context:component-scan base-package="com.donghua.jdbc"></context:component-scan>

<！--引入外部配置文件-->
<context:property-placeholder location="classpath:com/donghua/jdbc/jdbc.properties"/>
<bean id="userDao" class="com.donghua.jdbc.UserDao"></bean>

<!-- 一、配置数据库连接池 ComboPooledDataSource -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">

<!-- Connection properties -->
<property name="driverClass" value="${driverClass}" />
<property name="jdbcUrl" value="${jdbcUrl}" />
<property name="user" value="${username}" />
<property name="password" value="${password}" />
<!-- Pool properties-->
<property name="minPoolSize" value="2" />
<property name="maxPoolSize" value="10" />
<property name="maxStatements" value="50" />
<property name="idleConnectionTestPeriod" value="3000" />
<property name="loginTimeout" value="300" />

</bean>

<!-- 二、配置JdbcTemplate,引入模板数据源 -->
<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource" ref="dataSource"></property>
</bean>
</beans>

User.java

public class User {
private int age;
private String name;

public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}

}

package com.donghua.jdbc;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;

import javax.annotation.Resource;

import org.springframework.dao.DataAccessException;
import org.springframework.jdbc.core.ConnectionCallback;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Component;

@Component
public class UserDao {
//注入模板
@Resource
private JdbcTemplate jdbcTemplate;

public void save(final User u){
jdbcTemplate.execute(new ConnectionCallback() {
@Override
public Object doInConnection(Connection conn) throws SQLException,
DataAccessException {
String sql ="insert into t_user(age,userName) values(?,?)";
PreparedStatement ps = conn.prepareStatement(sql);
ps.setInt(1, u.getAge());
ps.setString(2, u.getName());
ps.execute();
ps.close();
return null;
}
});
}

/* (non-Javadoc)
* @see com.donghua.jdbc.UserInterface#update()
*/
public void update(){}
}

测试

public class UserDaoTest {
private ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml", getClass());

private UserDao userDao1 = (UserDao) ac.getBean("userDao");

@Test
public void testSave() {
User user = new User();
user.setName("李四");
userDao1.save(user);

}

@Test
public void testUpdate() {

}

}