使用Spring的JdbcTemplate进行CRUD

package com.mo;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;
import javax.annotation.Resource;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowMapper;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

/**
* 使用SpringJBDC的模板进行CRUD
*
* @author 文龙
* @version 2018-3-7 下午9:10:22
*/
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:spring.xml")
public class Demo {

@Resource(name="jdbcTemplate")
private JdbcTemplate jdbcTemplate;

@Test
public void update() {
//update可以完成增删改
jdbcTemplate.update("insert into t_account (name,money) values (?,?)","手机",10000);
jdbcTemplate.update("delete from t_account where id = ?",2);
jdbcTemplate.update("update t_account set name= ? where id = ?","电话",1);
}

@Test
public void select() {
//查询使用的是query()方法.RowMapper是将查询到的结果与java类进行对应起来

//查询当个对象
Account account = jdbcTemplate.queryForObject("select * from t_account where id = ?", new AccountMapper(), 1);
System.out.println(account); //Account [id=1, name=电话, money=1000]

//查询多个对象
List<Account> list = jdbcTemplate.query("select * from t_account where 1=?", new AccountMapper(),1);
System.out.println(list);

//查询记录数
Integer count = jdbcTemplate.queryForObject("select count(*) from t_account", Integer.class);
System.out.println(count);
}
}

class AccountMapper implements RowMapper<Account> {

//自己手动封装数据，一行一行封装
public Account mapRow(ResultSet rs, int arg1) throws SQLException {
Account account = new Account();
account.setId(rs.getInt("id"));
account.setName(rs.getString("name"));
account.setMoney(rs.getInt("money"));
return account;
}

}

package com.mo;

/**
* @author 文龙
* @version 2018-3-7 下午9:35:41
*/
public class Account {
private int id;
private String name;
private int money;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getMoney() {
return money;
}
public void setMoney(int money) {
this.money = money;
}
@Override
public String toString() {
return "Account [id=" + id + ", name=" + name + ", money=" + money
+ "]";
}

}


<?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.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
<!-- 配置连接池 spring只带的连接池 -->
<!-- <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
<property name="url" value="jdbc:mysql://localhost:3306/springjdbc"></property>
<property name="username" value="root"></property>
<property name="password" value="root"></property>
</bean> -->
<!-- 配置DBCP连接池 -->
<!-- <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver" ></property>
<property name="url" value="jdbc:mysql://localhost:3306/springjdbc"></property>
<property name="username" value="root"></property>
<property name="password" value="root"></property>
</bean> -->

<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="com.mysql.jdbc.Driver"></property>
<property name="jdbcUrl" value="jdbc:mysql://localhost:3306/springjdbc"></property>
<property name="user" value="root"></property>
<property name="password" value="root"></property>
</bean>
<!-- 配置Spring提供的JDBC模板 -->
<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource" ref="dataSource"></property>
</bean>

</beans>