Spring2 JDBC

声明：例子来源于《Spring2.0 技术手册》 一书

闲话不多说

环境 Spring2.0

建表语句：

create table t_user(
id number(6),
name varchar2(12),
age int
)

需要的jar 包

程序结构图

*注意beans-config.xml文件是在src目录下

先定义接口

public interface IUserDAO {
	public void insert(User user);
	public User find(int id);
}

model pojo对象

package com.spring2.demo;

public class User {
	private int id;
	private String name;
	private int age;
	
	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 getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}
	

}

接口实现类

package com.spring2.demo;

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

import javax.sql.DataSource;



public class UserDao implements IUserDAO {
	private DataSource dataSource;
	

	public DataSource getDataSource() {
		return dataSource;
	}

	public void setDataSource(DataSource dataSource) {
		this.dataSource = dataSource;
	}

	public User find(int id) {
		// TODO Auto-generated method stub
		Connection conn = null;
		PreparedStatement psmt = null;
		ResultSet rs = null;
		String sql = "SELECT * FROM t_user WHERE id=?";
		
		try{
			conn = dataSource.getConnection();
			psmt = conn.prepareStatement(sql);
			psmt.setInt(1, id);
			rs = psmt.executeQuery();
			
			while(rs.next()){
				int uid = rs.getInt(1);
				String name = rs.getString(2);
				int age = rs.getInt(3);
				
				User user = new User();
				user.setId(uid);
				user.setName(name);
				user.setAge(age);
				
				return user;
			}
		}catch (SQLException e) {
			e.printStackTrace();
		}finally{
			if(null != psmt){
				try {
					psmt.close();
				} catch (Exception e) {}
			}
			
			if(null != conn){
				try {
					conn.close();
				} catch (Exception e) {}
			}
		}
		return null;
	}

	public void insert(User user) {
		// TODO Auto-generated method stub
		int id = user.getId();
		String name = user.getName();
		int age = user.getAge();
		
		Connection conn = null;
		PreparedStatement psmt = null;
		String sql = "INSERT INTO t_user(id, name, age) VALUES(?,?,?)";
		try{
			conn = dataSource.getConnection();
			psmt = conn.prepareStatement(sql);
			psmt.setInt(1, id);
			psmt.setString(2, name);
			psmt.setInt(3, age);
			
			psmt.executeUpdate();
		}catch (SQLException e) {
			e.printStackTrace();
		}finally{
			if(null != psmt){
				try {
					psmt.close();
				} catch (Exception e) {}
			}
			
			if(null != conn){
				try {
					conn.close();
				} catch (Exception e) {}
			}
		}

	}

}

spring2 配置文件 beans-config.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"
 xsi:schemaLocation="http://www.springframework.org/schema/beans
 http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">

	<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
		<property name="driverClassName" value="oracle.jdbc.OracleDriver" />
		<property name="url" value="jdbc:oracle:thin:@IP地址:1521:orcl" />
		<property name="username" value="用户名" />
		<property name="password" value="密码" />
	</bean>
	
	<bean id="userDAO" class="com.spring2.demo.UserDao">
		<property name="dataSource" ref="dataSource" />
	</bean>
</beans>

测试：

package com.spring2.demo;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class SpringDaoDemo {
	public static void main(String[] args){
		ApplicationContext context = new ClassPathXmlApplicationContext("beans-config.xml");
		User user = new User();
		user.setId(2);
		user.setName("Jerry");
		user.setAge(50);
		
		IUserDAO userDAO = (IUserDAO) context.getBean("userDAO");
		userDAO.insert(user);
		System.out.println("INSERT FINISHED>>>>>>>");
		user = userDAO.find(1);
		System.out.println("name-->"+user.getName());
	}

}

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