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
本文转自左正博客园博客，原文链接：http://www.cnblogs.com/soundcode/p/6367545.html，如需转载请自行联系原作者
