spring管理数据库连接池完成 JdbcTemplate crud 及使用spirng提供的 test类--spring环境下
目录结构如上图
javabean - User类
package com.xiangshuai.bean;
public class User {
private String name;
private Integer id;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
@Override
public String toString() {
return "User [name=" + name + ", id=" + id + "]";
}
}
dao层
package com.xiangshuai.dao;
import java.util.List;
import com.xiangshuai.bean.User;
public interface UserDao {
public void save(User u);
public void delete(Integer id);
public void update(User u);
public User getById(Integer id);
public int getTotalCount();
public List<User> getAll();
}
package com.xiangshuai.dao;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;
import org.springframework.jdbc.core.RowMapper;
import org.springframework.jdbc.core.support.JdbcDaoSupport;
import com.xiangshuai.bean.User;
//使用JDBC模板实现增删改查
public class UserDaoImpl extends JdbcDaoSupport implements UserDao {
@Override
public void save(User u) {
String sql = "insert into t_user values(null,?) ";
super.getJdbcTemplate().update(sql, u.getName());
}
@Override
public void delete(Integer id) {
String sql = "delete from t_user where id = ? ";
super.getJdbcTemplate().update(sql,id);
}
@Override
public void update(User u) {
String sql = "update t_user set name = ? where id=? ";
super.getJdbcTemplate().update(sql, u.getName(),u.getId());
}
@Override
public User getById(Integer id) {
String sql = "select * from t_user where id = ? ";
return super.getJdbcTemplate().queryForObject(sql, new RowMapper<User>(){
@Override
public User mapRow(ResultSet rs, int arg1) throws SQLException {
User user = new User();
user.setId(rs.getInt("id"));
user.setName(rs.getString("name"));
return user;
}
},id);
}
@Override
public int getTotalCount() {
String sql = "select count(*) from t_user ";
Integer count = super.getJdbcTemplate().queryForObject(sql, Integer.class);
return count;
}
@Override
public List<User> getAll() {
String sql = "select * from t_user ";
List<User> list = super.getJdbcTemplate().query(sql, new RowMapper<User>(){
@Override
public User mapRow(ResultSet rs, int arg1) throws SQLException {
User u = new User();
u.setId(rs.getInt("id"));
u.setName(rs.getString("name"));
return u;
}});
return list;
}
}
配置文件
jdbc.jdbcUrl=jdbc:mysql:///crm
jdbc.driverClass=com.mysql.jdbc.Driver
jdbc.user=root
jdbc.password=password
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd ">
<!-- 指定spring读取db.properties配置 -->
<context:property-placeholder location="classpath:db.properties" />
<!-- 1.将连接池放入spring容器 -->
<bean name="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" >
<property name="jdbcUrl" value="${jdbc.jdbcUrl}" ></property>
<property name="driverClass" value="${jdbc.driverClass}" ></property>
<property name="user" value="${jdbc.user}" ></property>
<property name="password" value="${jdbc.password}" ></property>
</bean>
<!-- 2.将JDBCTemplate放入spring容器 -->
<bean name="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate" >
<property name="dataSource" ref="dataSource" ></property>
</bean>
<!-- 3.将UserDao放入spring容器 -->
<bean name="userDao" class="com.xiangshuai.dao.UserDaoImpl" >
<!-- <property name="jt" ref="jdbcTemplate" ></property> -->
<property name="dataSource" ref="dataSource" ></property>
</bean>
</beans>
测试
package com.xiangshuai.demo;
import java.util.List;
import javax.annotation.Resource;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import com.sun.org.apache.xml.internal.resolver.helpers.PublicId;
import com.xiangshuai.bean.User;
import com.xiangshuai.dao.UserDao;
/**
* @author lqx
* 引入 spring-aop.jar包
* 配置 c3p0 连接池 JdbcTemplate --applicationContext.xml中配置好
* * 所在位置:E:\学习文档子目录压缩\框架\spring\spring小技巧\spring管理数据库连接池完成 JdbcTemplate crud 及使用spirng提供的 test类--spring环境下
* E:\学习文档子目录压缩\框架\spring\简单模拟spring IOC底层实现原理
或 我的网盘/我的笔记/学习文档子目录压缩/框架/spring/spring小技巧/spring管理数据库连接池完成 JdbcTemplate crud 及使用spirng提供的 test类--spring环境下
*/
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class Demo {
@Resource(name="userDao")
private UserDao ud;
@Test
public void save(){
User user1 = new User();
user1.setName("王大亮");
User user2 = new User();
user1.setName("赵云");
ud.save(user1);
ud.save(user2);
}
@Test
public void delete(){
ud.delete(3);
}
@Test
public void update(){
User user = ud.getById(1);
user.setName("王小米");
ud.update(user);
}
@Test
public void getll(){
List<User> all = ud.getAll();
System.out.println(all);
}
}