- 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;
- 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
}
- 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) {}
}
}
}
}
- 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>
