drop table if exists user;

/*==============================================================*/
/* Table: user                                                  */
/*==============================================================*/
create table user
(
   id                   bigint AUTO_INCREMENT not null,
   name                 varchar(24),
   age                  int,
   primary key (id)
);

public class User {
    private Integer id;
    private String name;
    private Integer age;

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }
}

/**
* Created by IntelliJ IDEA.<br>
* <b>User</b>: leizhimin<br>
* <b>Date</b>: 2008-4-22 15:34:36<br>
* <b>Note</b>: DAO接口
*/
public interface IUserDAO {
    public void insert(User user);

    public User find(Integer id);
}

import javax.sql.DataSource;
import java.sql.Connection;
import java.sql.SQLException;

/**
* Created by IntelliJ IDEA.<br>
* <b>User</b>: leizhimin<br>
* <b>Date</b>: 2008-4-22 13:53:56<br>
* <b>Note</b>: 基类DAO，提供了数据源注入
*/
public class BaseDAO {
    private DataSource dataSource;

    public DataSource getDataSource() {
        return dataSource;
    }

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

    public Connection getConnection() {
        Connection conn = null;
        try {
            conn = dataSource.getConnection();
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return conn;
    }
}

/**
* Created by IntelliJ IDEA.<br>
* <b>User</b>: leizhimin<br>
* <b>Date</b>: 2008-4-22 15:36:04<br>
* <b>Note</b>: DAO实现
*/
public class UserDAO extends BaseDAO implements IUserDAO {

    public JdbcTemplate getJdbcTemplate(){
        return new JdbcTemplate(getDataSource());
    }
    public void insert(User user) {
        String name = user.getName();
        int age = user.getAge().intValue();

//        jdbcTemplate.update("INSERT INTO user (name,age) "
//                + "VALUES('" + name + "'," + age + ")");

        String sql = "insert into user(name,age) values(?,?)";
        getJdbcTemplate().update(sql,new Object[]{name,age});
    }

    public User find(Integer id) {
        List rows = getJdbcTemplate().queryForList(
                "SELECT * FROM user WHERE id=" + id.intValue());

        Iterator it = rows.iterator();
        if (it.hasNext()) {
            Map userMap = (Map) it.next();
            Integer i = new Integer(userMap.get("id").toString());
            String name = userMap.get("name").toString();
            Integer age = new Integer(userMap.get("age").toString());

            User user = new User();

            user.setId(i);
            user.setName(name);
            user.setAge(age);

            return user;
        }
        return null;
    }
}

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING/DTD BEAN/EN"
        "http://www.springframework.org/dtd/spring-beans.dtd">

<beans>
    <bean id="dataSource"
          class="org.apache.commons.dbcp.BasicDataSource" singleton="true">
        <property name="driverClassName">
            <value>com.mysql.jdbc.Driver</value>
        </property>
        <property name="url">
            <value>jdbc:mysql://localhost:3306/springdb</value>
        </property>
        <property name="username">
            <value>root</value>
        </property>
        <property name="password">
            <value>leizhimin</value>
        </property>
    </bean>

    <bean id="baseDAO" class="com.lavasoft.springnote.ch05_jdbc03_temp.BaseDAO" abstract="true">
        <property name="dataSource">
            <ref bean="dataSource"/>
        </property>
    </bean>

    <bean id="userDAO"
          class="com.lavasoft.springnote.ch05_jdbc03_temp.UserDAO" parent="baseDAO">
    </bean>

</beans>

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

/**
* Created by IntelliJ IDEA.<br>
* <b>User</b>: leizhimin<br>
* <b>Date</b>: 2008-4-22 15:59:18<br>
* <b>Note</b>: 测试类，客户端
*/
public class SpringDAODemo {
    public static void main(String[] args) {
        ApplicationContext context = new FileSystemXmlApplicationContext("D:\\_spring\\src\\com\\lavasoft\\springnote\\ch05_jdbc03_temp\\bean-jdbc-temp.xml");
        User user = new User();
        user.setName("hahhahah");
        user.setAge(new Integer(22));
        IUserDAO userDAO = (IUserDAO) context.getBean("userDAO");
        userDAO.insert(user);
        user = userDAO.find(new Integer(1));
        System.out.println("name: " + user.getName());
    }
}

log4j:WARN No appenders could be found for logger (org.springframework.core.CollectionFactory).
log4j:WARN Please initialize the log4j system properly.
name: jdbctemplate

Process finished with exit code 0