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

Spring+JDBC实例

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