Spring+JDBC实例

1. Customer 表

在这个例子中，我们使用的是MySQL数据库。

CREATE TABLE `customer` (

  `CUST_ID` int(10) unsigned NOT NULL AUTO_INCREMENT,

  `NAME` varchar(100) NOT NULL,

  `AGE` int(10) unsigned NOT NULL,

  PRIMARY KEY (`CUST_ID`)

) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;

2. Customer模型

添加一个客户模型用来存储用户的数据。

package com.yiibai.customer.model;

import java.sql.Timestamp;

public class Customer

{

	int custId;

	String name;

	int age;

	//getter and setter methods

}

4. 数据访问对象 (DAO) 模式

Customer Dao 接口.

package com.yiibai.customer.dao;

import com.yiibai.customer.model.Customer;

public interface CustomerDAO

{

	public void insert(Customer customer);

	public Customer findByCustomerId(int custId);

}

客户的DAO实现，使用 JDBC 发出简单的 insert 和 select SQL语句。

package com.yiibai.customer.dao.impl;

import java.sql.Connection;

import java.sql.PreparedStatement;

import java.sql.ResultSet;

import java.sql.SQLException;

import javax.sql.DataSource;

import com.yiibai.customer.dao.CustomerDAO;

import com.yiibai.customer.model.Customer;

public class JdbcCustomerDAO implements CustomerDAO

{

	private DataSource dataSource;

	public void setDataSource(DataSource dataSource) {

		this.dataSource = dataSource;

	}

	public void insert(Customer customer){

		String sql = "INSERT INTO CUSTOMER " +

				"(CUST_ID, NAME, AGE) VALUES (?, ?, ?)";

		Connection conn = null;

		try {

			conn = dataSource.getConnection();

			PreparedStatement ps = conn.prepareStatement(sql);

			ps.setInt(1, customer.getCustId());

			ps.setString(2, customer.getName());

			ps.setInt(3, customer.getAge());

			ps.executeUpdate();

			ps.close();

		} catch (SQLException e) {

			throw new RuntimeException(e);

		} finally {

			if (conn != null) {

				try {

					conn.close();

				} catch (SQLException e) {}

			}

		}

	}

	public Customer findByCustomerId(int custId){

		String sql = "SELECT * FROM CUSTOMER WHERE CUST_ID = ?";

		Connection conn = null;

		try {

			conn = dataSource.getConnection();

			PreparedStatement ps = conn.prepareStatement(sql);

			ps.setInt(1, custId);

			Customer customer = null;

			ResultSet rs = ps.executeQuery();

			if (rs.next()) {

				customer = new Customer(

					rs.getInt("CUST_ID"),

					rs.getString("NAME"),

					rs.getInt("Age")

				);

			}

			rs.close();

			ps.close();

			return customer;

		} catch (SQLException e) {

			throw new RuntimeException(e);

		} finally {

			if (conn != null) {

				try {

				conn.close();

				} catch (SQLException e) {}

			}

		}

	}

}

5. Spring bean配置

创建 customerDAO 和数据源在 Spring bean 配置文件中。

File : Spring-Customer.xml

<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-2.5.xsd">

	<bean id="customerDAO" class="com.yiibai.customer.dao.impl.JdbcCustomerDAO">

		<property name="dataSource" ref="dataSource" />

	</bean>

</beans>

File : Spring-Datasource.xml

<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-2.5.xsd">

	<bean id="dataSource"

		class="org.springframework.jdbc.datasource.DriverManagerDataSource">

		<property name="driverClassName" value="com.mysql.jdbc.Driver" />

		<property name="url" value="jdbc:mysql://localhost:3306/yiibaijava" />

		<property name="username" value="root" />

		<property name="password" value="password" />

	</bean>

</beans>

File : Spring-Module.xml

<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-2.5.xsd">

	<import resource="database/Spring-Datasource.xml" />

	<import resource="customer/Spring-Customer.xml" />

</beans>

6.项目结构

本实例完整目录结构。

7.运行它

package com.yiibai.common;

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.yiibai.customer.dao.CustomerDAO;

import com.yiibai.customer.model.Customer;

public class App

{

    public static void main( String[] args )

    {

    	ApplicationContext context =

    		new ClassPathXmlApplicationContext("applicationContext.xml");

        CustomerDAO customerDAO = (CustomerDAO) context.getBean("customerDAO");

        Customer customer = new Customer(1, "yiibai",29);

        customerDAO.insert(customer);

        Customer customer1 = customerDAO.findByCustomerId(1);

        System.out.println(customer1);

    }

}

输出结果：

Customer [age=29, custId=1, name=yiibai]

下载源代码 – http://pan.baidu.com/s/1SR2GI

巴特西

Spring+JDBC实例

1. Customer 表

2. Customer模型

4. 数据访问对象 (DAO) 模式

5. Spring bean配置

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