使用spring jdbc template简化jdbc数据库操作实例代码

文章地址: http://blog.csdn.net/5iasp/article/details/12206793

作者： javaboy2012
Email：[email protected]
qq:    1046011462

 

使用spring jdbc template简化jdbc数据库操作实例代码

 

包括如下几个类：

 

1. DAO接口

 

package com.test;

import java.util.List;

import org.springframework.jdbc.core.JdbcTemplate;

public interface DAO {
	
	public int getCount(String sql);
	
	public String getResultValue(String sql, String column);

	public List getResult(String sql);

	public void update(String sql);
	public void update(String sql,Object[] params);

	public void delete(String sql);
	
	public JdbcTemplate getJt();

}

2. DAO接口实现类 DAOImpl

package com.test;

import java.util.List;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.dao.DataAccessException;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.support.rowset.SqlRowSet;

public class DAOImpl implements  DAO{


	protected final Log log = LogFactory.getLog(this.getClass());
	
	private JdbcTemplate jt;


	public int getCount(String sql) {
		int count = 0;
		try {
			count = jt.queryForInt(sql);
		} catch (DataAccessException e) {
			log.info("!!!!!!!!!!!!!!!!!!!Exception:" + e);
		}
		return count;
	}
	
	public String getResultValue(String sql, String column) {
		String value = "";
		try {
			SqlRowSet s = jt.queryForRowSet(sql);
			while (s.next()){
				value = s.getString(column);
			}
		} catch (DataAccessException e) {
			log.info("!!!!!!!!!!!!!!!!!!!Exception:" + e);
		}
		return value;
	}

	public List getResult(String sql) {
		List list = null;
		try {
			list = jt.queryForList(sql);
		} catch (DataAccessException e) {
			log.info("!!!!!!!!!!!!!!!!!!!Exception:" + e);
		}
		return list;
	}

	public void update(String sql) {

		try {
			jt.update(sql);
		} catch (DataAccessException e) {
			log.info("!!!!!!!!!!!!!!!!!!!Exception:" + e);
		}
	}

	public void delete(String sql) {
		try {
			jt.execute(sql);
		} catch (DataAccessException e) {
			log.info("!!!!!!!!!!!!!!!!!!!Exception:" + e);
		}
	}



	@Override
	public void update(String sql, Object[] params) {
		// TODO Auto-generated method stub
		try {
			jt.update(sql,params);
		} catch (DataAccessException e) {
			log.info("!!!!!!!!!!!!!!!!!!!Exception:" + e);
		}
	}

	public void setJt(JdbcTemplate jt) {
		this.jt = jt;
	}
	
	public JdbcTemplate getJt() {
		return jt;
	}

}

3. UserManager 接口

package com.test;

import java.util.List;
import java.util.Map;



public interface UserManager {
	
	
	
	
	public void addUser(String name);
	
	public void updateUser(String name,int id);
	
	public void deleteUser(int id);
	
	public String getUser(int id);
	
	public User getUserByID(int id);

	
	public List getUsers();
	
	public List<User> getUserList();

	
	public void init();
	

}

4. UserManagerImpl：UserManager 接口实现类

 

package com.test;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.springframework.jdbc.core.RowMapper;



public class UserManagerImpl implements UserManager {
	
	
	private DAO dao;

	/**
	 * @param args
	 */
	public static void main(String[] args) {


	}
	
	public void addUser(String name)
	{
		/*
		String sql="insert into t_test(name) values('"+name+"')";
		dao.update(sql);
		*/
		String sql="insert into t_test(name) values(?)";
		Object[] params = new Object[] {name};
		dao.update(sql, params);
		
	}
	
	public List getUsers()
	{
		String sql = "select * FROM t_test";
		List<Map> lists = dao.getResult(sql);
		return lists;
	}
	

	public DAO getDao() {
		return dao;
	}

	public void setDao(DAO dao) {
		this.dao = dao;
	}

	@Override
	public void init() {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void updateUser(String name, int id) {
		/*
		String sql="update t_test set name='"+name+"' where id="+id;
		dao.update(sql);
		*/
		/*
		String sql="update t_test set name=? where id="+id;
		Object[] params = new Object[] {name};
		*/
		String sql="update t_test set name=? where id=?";
		Object[] params = new Object[] {name,new Integer(id)};
		dao.update(sql, params);
		
		
	}

	@Override
	public void deleteUser(int id) {
		String sql="delete from t_test where id="+id;
		dao.delete(sql);
		
	}

	@Override
	public String getUser(int id) {
		// TODO Auto-generated method stub
		String sql="select name from t_test where id="+id;
		String name=dao.getResultValue(sql, "name");
		return name;
	}
	
	@Override
	public User getUserByID(int id) {

		User user=null;
		String sql="select id,name from t_test where id="+id;
		
		List<Map> lists = dao.getResult(sql);
		if (lists.size()>0)
		{
			user=new User();
			Map map=lists.get(0);
			user.setId((Integer)map.get("id"));
			user.setName((String)map.get("name"));
		}
		return user;
	}

	@Override
	public List<User> getUserList() {
		String sql = "select * FROM t_test";
		List<Map> lists = dao.getResult(sql);
		List<User> users=new ArrayList<User>();
		if (lists.size()>0)
		{
			for(int i=0;i<lists.size();i++)
			{
				User user=new User();
				Map map=lists.get(i);
				user.setId((Integer)map.get("id"));
				user.setName((String)map.get("name"));
				users.add(user);
			}
		}
		
		return users;
	
	}
	
	

}

5. User类：实体类

package com.test;

public class User {
	
	private String name;
	private int id;
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	
	
	
	

}

6. SpringUtil　：　工具类

 

package com.test;

import java.util.List;
import java.util.Map;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
/**
 * spring工具类
 * @author 
 *
 */
public class SpringUtil {

	/**
	 * @param args
	 */
	public static void main(String[] args) {

		UserManager um=	(UserManager)SpringUtil.getBean("userManager");
		List<Map> users=um.getUsers();
		for(int i=0;i<users.size();i++)
		{
			String t_id=users.get(i).get("id").toString();
			String t_name=users.get(i).get("name").toString();
			System.out.println(t_id+"-"+t_name);
		}

	}

	private static ApplicationContext ctx = new ClassPathXmlApplicationContext(
			"applicationContext.xml");

	public static Object getBean(String beanName) {
		return ctx.getBean(beanName);
	}

}

7. 测试类： Test

 

package com.test;

import java.util.List;
import java.util.Map;

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

public class Test {

	/**
	 * @param args
	 */
	public static void main(String[] args) {

		/*
		ApplicationContext ctx = new ClassPathXmlApplicationContext("classpath:applicationContext.xml");
		UserManager um=(UserManager)ctx.getBean("userManager");
		*/
		
		UserManager um=	(UserManager)SpringUtil.getBean("userManager");
		
		//新增
		/*
		String name="test";
		um.addUser(name);
		*/
		
		//列表
		List<Map> users=um.getUsers();
		for(int i=0;i<users.size();i++)
		{
			String t_id=users.get(i).get("id").toString();
			String t_name=users.get(i).get("name").toString();
			System.out.println(t_id+"-"+t_name);
		}
		
		
		//修改
		//um.updateUser("test6", 6);
		
		//删除
		//um.deleteUser(1);
		
		//获取某个字段
		//String name2=um.getUser(2);
		//System.out.println(name2+"-"+name2);
		
		// 获取对象列表
		List<User> users2=um.getUserList();
		for(int i=0;i<users2.size();i++)
		{
			int t_id2=users2.get(i).getId();
			String t_name2=users2.get(i).getName();
			System.out.println(t_id2+"-"+t_name2);
		}
		
		//获取对象
		User u=um.getUserByID(2);
		System.out.println(u.getId()+"-"+u.getName());

	}

}

8.  Spring 配置文件：applicationContext.xml

 

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

<beans>
	<!-- DB -->
	<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
		<property name="driverClassName">
			<value>com.mysql.jdbc.Driver</value>
		</property>
		<property name="url">
			<value>jdbc:mysql://127.0.0.1/myweb?useUnicode=true&characterEncoding=gbk</value>
		</property>
		<property name="username">
			<value>root</value>
		</property>
		<property name="password">
			<value>root</value>
		</property>
	</bean>
	
	
	<bean id="jdbcTemplate"
        class="org.springframework.jdbc.core.JdbcTemplate" abstract="false"
        lazy-init="false" autowire="default" dependency-check="default">
        <property name="dataSource">
            <ref bean="dataSource" />
        </property>
    </bean>

    

	<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
		<property name="dataSource">
			<ref bean="dataSource" />
		</property>
	</bean>
	
	<bean id="springDAOProxy"                               
          class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean"> 
        <property name="proxyInterfaces"> 
            <list>
                <value>com.test.DAO</value>
            </list>
        </property>
        <property name="target"> 
            <ref bean="DAO"/> 
        </property> 
        <property name="transactionManager"> 
            <ref bean="transactionManager"/> 
        </property> 
        <property name="transactionAttributes"> 
            <props> 
                <prop key="insert*">PROPAGATION_REQUIRED</prop>
                <prop key="update*">PROPAGATION_REQUIRED</prop>
                <prop key="delete*">PROPAGATION_REQUIRED</prop> 
            </props> 
        </property>        
    </bean> 

	<bean id="DAO" class="com.test.DAOImpl">
		<property name="jt">
          <ref bean="jdbcTemplate" />
       </property>
	</bean>
	
    <bean name="userManager" class="com.test.UserManagerImpl" init-method="init">
            <property name="dao">
                    <ref bean="DAO" />
            </property>
    </bean>
        

</beans>

 

9. web环境下调用：

web.xml配置：

 

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 
	xmlns="http://java.sun.com/xml/ns/javaee" 
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
	http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
	
	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>
	
	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>/WEB-INF/classes/applicationContext.xml</param-value>
	</context-param>
	
	
	
	
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
</web-app>

测试jsp文件：

 

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ page import="org.springframework.web.context.WebApplicationContext"%>
<%@ page import="com.test.*"%>
<%@ page import="org.springframework.web.context.support.WebApplicationContextUtils"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>



<%

WebApplicationContext ctx = WebApplicationContextUtils.getWebApplicationContext(this.getServletContext());
UserManager um = (UserManager) ctx.getBean("userManager");


 %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>spring jdbc test</title>
	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">    
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<meta http-equiv="description" content="This is my page">
	<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->
  </head>
  
  <body>
<br>

<%
		List<User> users2=um.getUserList();
		for(int i=0;i<users2.size();i++)
		{
			int t_id2=users2.get(i).getId();
			String t_name2=users2.get(i).getName();
			%>
			<%=t_id2 %>-<%=t_name2 %> <br>
			<%
			System.out.println(t_id2+"-"+t_name2);
		}

 %>



  </body>
</html>

 

 
资源下载地址(不需要下载积分)：http://download.csdn.net/detail/5iasp/6344527