利用DOM动态更新列表-(最终版源码Ajax+JSP+Servlet+Spring+SQL Server)

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大概有一段时间没有进入blog写些东西了。今天我将利用DOM动态更新列表-(最终版源码Ajax+JSP+Servlet+Spring+SQL Server)，奉献给大家。当然，还是那个宗旨喜欢就看看吧。

1、首先给出这个程序设计的流程

表现层：JSP+JavaScript+Ajax

控制层：Servlet

业务逻辑层：Spring的IOC容器

数据持久层：Spring中的JDBC

数据库层：由SQL Server提供支持

上面给出了程序设计的流程，那么我在程序设计的时候就是通过上述流程来实现的。

2、实现步骤如下

整个程序设计的步骤由数据持久层向表现层实现

第一：数据持久层

DAO接口实现代码：

package com.gxa.edu.spring.dao;
/**
*@author 国信安百杰
*/
import java.util.List;

import com.gxa.edu.spring.bean.Shopping;

public interface ShoppingDao {
	int insertShopping(Shopping shopping);
	
	int deleteShopping(Shopping shopping);
	
	List queryShopping();
	
	int queryMaxShoppingId();
}

实现DAO接口的类代码：

package com.gxa.edu.spring.dao.impl;
/**
*@author 国信安百杰
*/
import java.util.List;

import org.springframework.jdbc.core.support.JdbcDaoSupport;

import com.gxa.edu.spring.bean.Shopping;
import com.gxa.edu.spring.dao.ShoppingDao;
import com.gxa.edu.spring.rowmapper.ShoppingRowMapper;

public class ShoppingDaoImpl extends JdbcDaoSupport implements ShoppingDao{

	public int deleteShopping(Shopping shopping) {
		// TODO Auto-generated method stub
		String sql = "delete from shopping where shoppingName = ?";
		Object[] obj = {shopping.getShoppingName()};
		return getJdbcTemplate().update(sql, obj);
	}

	public int insertShopping(Shopping shopping) {
		// TODO Auto-generated method stub
		String sql = "insert into shopping values(?,?)";
		Object[] obj = {shopping.getShoppingId(), shopping.getShoppingName()};
		return getJdbcTemplate().update(sql, obj);
	}

	public List queryShopping() {
		// TODO Auto-generated method stub
		String sql = "select * from shopping";
		return getJdbcTemplate().query(sql, new ShoppingRowMapper());
	}

	public int queryMaxShoppingId() {
		// TODO Auto-generated method stub
		String sql = "select max(shoppingId) from shopping";
		return getJdbcTemplate().queryForInt(sql);
	}

}

编写完上面的接口和类，那么就需要在Spring的配置文件中配置相应的信息

<bean id="shoppingDao" class="com.gxa.edu.spring.dao.impl.ShoppingDaoImpl">
	<property name="dataSource">
		<ref local="dataSource"/>
	</property>
</bean>

实现Spring的RowMapper接口的类：

package com.gxa.edu.spring.rowmapper;
/**
*RowMapper接口主要是通过Spring对JDBC的封装将数据封装给一个JavaBean
*@author 国信安百杰
*/
import java.sql.ResultSet;
import java.sql.SQLException;

import org.springframework.jdbc.core.RowMapper;

import com.gxa.edu.spring.bean.Shopping;

public class ShoppingRowMapper implements RowMapper{

	public Object mapRow(ResultSet arg0, int arg1) throws SQLException {
		// TODO Auto-generated method stub
		Shopping shopping = new Shopping();
		shopping.setShoppingId(arg0.getInt("shoppingId"));
		shopping.setShoppingName(arg0.getString("shoppingName"));
		return shopping;
	}

}

实现Shopping JavaBean的代码：

package com.gxa.edu.spring.bean;
/**
*@author 国信安百杰
*/
public class Shopping {
	private int shoppingId;
	private String shoppingName;
	public int getShoppingId() {
		return shoppingId;
	}
	public void setShoppingId(int shoppingId) {
		this.shoppingId = shoppingId;
	}
	public String getShoppingName() {
		return shoppingName;
	}
	public void setShoppingName(String shoppingName) {
		this.shoppingName = shoppingName;
	}
}

第二：业务逻辑层

package com.gxa.edu.spring.logic;
/**
*@author 国信安百杰
*/
import java.util.List;

import com.gxa.edu.spring.bean.Shopping;
import com.gxa.edu.spring.dao.ShoppingDao;

public class ShoppingLogic {
	private ShoppingDao dao;

	public void setDao(ShoppingDao dao) {
		this.dao = dao;
	}
	
	public List queryShopping() {
		return dao.queryShopping();
	}
	
	public int deleteShopping (Shopping shopping) {
		return dao.deleteShopping(shopping);
	}
	
	public int insertShopping(Shopping shopping) {
		return dao.insertShopping(shopping);
	}
	
	public int queryMaxShoppingId() {
		return dao.queryMaxShoppingId();
	}

}

业务逻辑类在Spring中配置信息

<bean id="shoppingLogic" class="com.gxa.edu.spring.logic.ShoppingLogic">
	<property name="dao">
		<ref local="shoppingDao"/>
	</property>
</bean>

第三：控制层的实现

package com.gxa.edu.servlet;
/**
*@author 国信安百杰
*/
import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;

import com.gxa.edu.spring.bean.Shopping;
import com.gxa.edu.spring.logic.ShoppingLogic;

public class ShoppingServlet extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public ShoppingServlet() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		request.setCharacterEncoding("UTF-8");
		response.setContentType("text/xml; charset=UTF-8");
		String name = request.getParameter("name");
		String action = request.getParameter("action");
		
		System.out.println("name===" + name);
		System.out.println("action===" + action);
		
		PrintWriter out = response.getWriter();
		WebApplicationContext wc = WebApplicationContextUtils.getRequiredWebApplicationContext(this.getServletContext());
		ShoppingLogic logic = (ShoppingLogic) wc.getBean("shoppingLogic");
		if ("add".equals(action)) {
			int i = logic.queryMaxShoppingId();
			
			System.out.println(i);
			
			Shopping shopping = new Shopping();
			shopping.setShoppingId(i + 1);
			shopping.setShoppingName(name);
			
			if (logic.insertShopping(shopping) > 0) {
				out.println("添加商品成功");
			} else {
				out.println("添加商品失败");
			}
		}
		if ("del".equals(action)) {
			Shopping shopping = new Shopping();
			shopping.setShoppingName(name);
			if (logic.deleteShopping(shopping) > 0) {
				out.println("删除商品成功");
			} else {
				out.println("删除商品失败");
			}
		}
		out.close();
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doGet(request, response);
	}

	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occure
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}

第四：表现层的实现
表现层中创建一个dynamicShopping.jsp页面，在该页面里面编写了Ajax代码

<%@ page language="java" import = "java.util.*" pageEncoding="gb2312"%>
<%@ page import = "org.springframework.web.context.WebApplicationContext" %>
<%@ page import = "org.springframework.web.context.support.WebApplicationContextUtils" %>
<%@ page import = "com.gxa.edu.spring.logic.*" %>
<%@ page import = "com.gxa.edu.spring.bean.*" %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    
    <title>实现Web页面局部动态更新品牌信息</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">
	-->
	<link rel="stylesheet" type="text/css" href="images/css.css">
	<script type="text/javascript">
		var XMLHttpReq = false;
	 	//创建XMLHttpRequest对象       
	    function createXMLHttpRequest() {
			if(window.XMLHttpRequest) { //Mozilla 浏览器
				XMLHttpReq = new XMLHttpRequest();
			}
			else if (window.ActiveXObject) { // IE浏览器
				try {
					XMLHttpReq = new ActiveXObject("Msxml2.XMLHTTP");
				} catch (e) {
					try {
						XMLHttpReq = new ActiveXObject("Microsoft.XMLHTTP");
					} catch (e) {}
				}
			}
		}
		
		//添加商品的相应函数
		function addSortProcessResponse() {
			if (XMLHttpReq.readyState == 4) {//和服务器端交互完毕
				if (XMLHttpReq.status == 200) {//返回成功信息
					addSortList();
				}
			}
		}
		
		//确认按钮出发事件函数
		function addSort() {
			var name = document.getElementById("name").value;
			if (name == "") {
				return;
			}
			var url = "ShoppingServlet?action=add" + "&name=" + name;
			createXMLHttpRequest();
			XMLHttpReq.open("GET", url, true);//建立服务器端连接
			XMLHttpReq.onreadystatechange = addSortProcessResponse;//指定添加商品的相应函数	
			XMLHttpReq.send(null);
		}
		
		//一旦添加商品信息进入后台数据库，就执行此函数将信息打印到页面
		function addSortList() {
			var name = document.getElementById("name").value;
			if (name == "") {
				return;
			}
			var row = document.createElement("tr");
			row.setAttribute("id", name);
			var cell = document.createElement("td");
			cell.appendChild(document.createTextNode(name));
			row.appendChild(cell);
			
			//添加删除按钮
			var deleteButton = document.createElement("input");
			deleteButton.setAttribute("type", "button");
			deleteButton.setAttribute("value", "删除");
			deleteButton.onclick = function () {deleteSort(name)};
			cell = document.createElement("td");
			cell.appendChild(deleteButton);
			row.appendChild(cell);
			
			//将设置好的元素动态添加到tbody里面
			document.getElementById("sortList").appendChild(row);
			//添加完品牌后就清空输入框
			document.getElementById("name").value="";
		}
		
		//删除品牌信息相应函数
		function deleteSortProcessResponse() {
			if (XMLHttpReq.readyState == 4) {//和服务器端交互完毕
				if (XMLHttpReq.status == 200) {//返回成功信息
					window.alert("删除成功");
				}
			}
		}
		
		//删除品牌信息
		function deleteSort(id) {
			if (id != null) {
				//var row = document.getElementById(id);
				//var sorlist = document.getElementById("sortlist");
				//sorlist.removeChild(row);

				var url = "ShoppingServlet?action=del" + "&name=" + id;
				createXMLHttpRequest();
				XMLHttpReq.open("GET", url, true);//建立服务器端连接
				XMLHttpReq.onreadystatechange = deleteSortProcessResponse;//指定添加商品的相应函数	
				XMLHttpReq.send(null);
				clearSort(id);//清空表格中信息
			}
		}
		
		//清空表格中信息
		function clearSort(id) {
			if (id != null) {
				var row = document.getElementById(id);
				var sorlist = document.getElementById("sortlist");
				sorlist.removeChild(row);
			}
		}
	</script>

  </head>
  
  <% 
  	WebApplicationContext ctx = WebApplicationContextUtils.getWebApplicationContext(getServletContext());
  	ShoppingLogic logic = (ShoppingLogic) ctx.getBean("shoppingLogic");
  	List list = logic.queryShopping();
  %>
  
  <body>
    <table style="BORDER-COLLAPSE: collapse" bordercolor="#111111" cellspacing="0" cellpadding="2" width="400" bgcolor="#f5efe7" border="0">
		<tr>
			<td align="middle" height="4" colspan="3">
				<img height="4" src="images/promo_list_top.gif" width="100%" border="0" alt="">
			</td>
		</tr>
		<tr>
			<td align="middle" bgcolor="#dbc2b0" height="19" colspan="3">
				<b>品牌信息管理</b>
			</td>
		</tr>
		<tr>
			<td height="20">
				增加新品牌:
			</td>
			<td height="20">
				<input id="name" type="text" size="15">
			</td>
			<td height="20">
				<img src="images/ok.gif" onclick="addSort();" alt="">
			</td>
	
		</tr>
		<tr>
			<td height="20">
				品牌信息管理:
			</td>
	
		</tr>
		<table border="1" width="400">
			<tr>
				<td height="20" valign="top" align="center">
					品牌名称:
				</td>
				<td id="pos_1" height="20">
					操作
				</td>
			</tr>
			<tbody id="sortList">
			<% 
				for (int i = 0; i < list.size(); i++) {
					Shopping shopping = (Shopping) list.get(i);%>
				<tr id="<%=shopping.getShoppingName() %>">
					<td><%=shopping.getShoppingName() %></td>
					<td><input type="button" value="删除" onclick="deleteSort('<%=shopping.getShoppingName() %>')"></input></td>
				</tr>
			<%}%>
			</tbody>
		</table>
	</table>
  </body>
</html>

最后，给出整个Spring的配置文件applicationContext.xml的代码

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

<beans>

	<!-- 配置SQL Server数据源 -->
	<bean id="dataSource"
		class="org.apache.commons.dbcp.BasicDataSource"
		destroy-method="close">
		<property name="driverClassName">
			<value>com.microsoft.jdbc.sqlserver.SQLServerDriver</value>
		</property>
		<property name="url">
			<value>jdbc:microsoft:sqlserver://127.0.0.1:1433;DatabaseName=stu</value>
		</property>
		<property name="username">
			<value>sa</value>
		</property>
		<property name="password">
			<value>123456</value>
		</property>
	</bean>
			
	<!-- =====DataSourceTransactionManager来对数据源进行事务管理===== -->
	<bean id="transactionManager"
		class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
		<property name="dataSource">
			<ref local="dataSource" />
		</property>
	</bean>

	<!-- =====TransactionProxyFactoryBean一个事务管理代理工厂bean，它是我们Spring中一个拦截器====== -->
	<bean id="basicTransactionProxy"
		class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean"
		abstract="true">
		<property name="transactionManager">
			<ref local="transactionManager" />
		</property>
		<property name="transactionAttributes">
			<props>
				<prop key="get*">PROPAGATION_REQUIRED,readOnly</prop>
				<prop key="insert*">PROPAGATION_REQUIRED</prop>
				<prop key="update*">PROPAGATION_REQUIRED</prop>
			</props>
		</property>
		<!-- <property name="proxyTargetClass" value="true"></property> -->
	</bean>
			
	<!-- ====配置ShoppingDao===== -->
	<bean id="shoppingLogic" class="com.gxa.edu.spring.logic.ShoppingLogic">
		<property name="dao">
			<ref local="shoppingDao"/>
		</property>
	</bean>
	
	<bean id="shoppingDao" class="com.gxa.edu.spring.dao.impl.ShoppingDaoImpl">
		<property name="dataSource">
			<ref local="dataSource"/>
		</property>
	</bean>
</beans>

3、总结
上面的代码其实在我们开发和运用肯定是微乎其微，但是在我们平时刚开始学习的时候，这段代码确实我们进步的基础。

要给大家说一下的是Spring框架的版本是1.2的。在applicationContext.xml文件加入了1.2版本的事务管理。Spring1.2版本的事务管理和高版本的有比较大的区别。当然，大家对Spring比较了解的可以使用高一些的版本，如Spring2.0或是Spring2.5.