ajax示范2-AJAX教程-爱易网页

ajax示范2

日期：2014-05-16　浏览次数：20716 次

ajax示例2

ajax2.jsp:

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<script type="text/javascript" src="js/prototype1.6.js"></script>
<script type="text/javascript">
	              
	function showEmps(){
	     new Ajax.Request(
	         "empserv?t="+new Date().getTime(),
	         {
	              method:"post",
	              parameters:{"name":$F("name")},
	              onSuccess:function(req){
	                  var emps = req.responseText.evalJSON();
	                  //清空table表格
	                  clearTable();
	                  //循环生成table列表
	                  for(i=0;i<emps.length;i++){
	                       var emp = emps[i];
	                       //在table最后位置添加一行tr
	                       var tr = $("tb").insertRow($("tb").rows.length);
	                       tr.onmouseover = function(){
	                       	    this.style.backgroundColor = "#00FFFF";
	                       }
	                       tr.onmouseout = function(){
	                            this.style.backgroundColor = "#FFFFFF";
	                       }
	                       //添加td,显示name
	                       var name_td = tr.insertCell(tr.cells.length);
	                       name_td.innerHTML = emp.name;
	                       name_td.onclick = function(){
	                           $("name").value =  this.innerHTML;
	                            //清空table表格
	                           clearTable();
	                       }
	                       //添加td,显示salary
	                       var sal_td = tr.insertCell(tr.cells.length);
	                       sal_td.innerHTML = emp.salary;
	                  }
	              }
	         }
	     );
	}
	
	function clearTable(){
	  var len = $("tb").rows.length;
	  for(i=len-1;i>=0;i--){
	     $("tb").deleteRow(i);
	  }
	}
</script>
</head>
<body>
<input type="text" name="name" id="name" oninput="showEmps()" onkeyup="showEmps()"/>
<input type="button" value="清空" onclick="clearTable()"/>
<input type="button" value="查询" onclick="showEmps()"/>
<hr>
<table id="tb"></table>
</body>
</html>

EmpServlet :

package serv;

import java.io.IOException;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.sql.SQLException;
import java.util.List;

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

import net.sf.json.JSONArray;

import dao.EmployeeDAO;

public class EmpServlet extends HttpServlet{
?public void doPost(HttpServletRequest request,HttpServletResponse response) throws IOException{
??doGet(request,response);
?}
?public void doGet(HttpServletRequest request,HttpServletResponse response) throws IOException{
??request.setCharacterEncoding("utf-8");
??String name = request.getParameter("name");
??System.out.println(name);
??response.setContentType("text/json;charset=utf-8");
??EmployeeDAO empDAO = new EmployeeDAO();
??try {
???List list = empDAO.findLikeName(name);
??????????? JSONArray json = JSONArray.fromObject(list);
??????????? String emps = json.toString();
???System.out.println(emps);
???PrintWriter out = response.getWriter();
???out.print(emps);
???out.close();
??} catch (Exception e) {
???e.printStackTrace();
??}
?}
}

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ajax示范2

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