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jquery触发select的change事件失效的问题解决

时间:2021-07-01 10:21:17 帮助过:9人阅读

jquery在页面第二次加载的时候触发不了下拉框的change事件,启动tomcat,地址栏输入localhost:8080/aa/list.jsp时能够触发下拉框的change事件,但是从servlet过来后就不起作用了,怎么回事?

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt" %>
<!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>信息界面</title>
<script type="text/javascript" src="js/jquery-1.4.4.min.js"></script>
<script type="text/javascript">
	$(document).ready(function(){
		
		$("#sel_emp").live('change',function(){
			var value = $('#sel_emp').val();
			alert(value);
			window.location = "/aa/servlet/Test1Servlet";
		});
		
	});

</script>
</head>
<body>
<select id="sel_emp">
	<option value="1">编号</option>
	<option value="2">姓名</option>
</select>
	<table border="1">
		<tr>
			<th>编号</th>
			<th>姓名</th>
		</tr>
		<c:forEach items="${list }" var="element">
		<tr>
			<td>${element.uid }</td>
			<td>${element.username }</td>
		</tr>
		</c:forEach>
	</table>
</body>
</html>

------------------------servlet

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		
		
		Employee employee_01 = new Employee();
		employee_01.setUid("1");
		employee_01.setUsername("张三");
		
		Employee employee_02 = new Employee();
		employee_02.setUid("2");
		employee_02.setUsername("李四");
		
		List<Employee> list = new ArrayList<Employee>();
		list.add(employee_01);
		list.add(employee_02);
		
		request.setAttribute("list", list);
		
		request.getRequestDispatcher("/list.jsp").forward(request, response);		

问题补充:

你是指,在从servlet 跳转至该页面后,点击下拉菜单,选择一个值的时候,不会触发这下面这个:

引用

# function(){  
#           
#         $("#sel_emp").live('change',function(){  
#             var value = $('#sel_emp').val();  
#             alert(value);  
#             window.location = "/aa/servlet/Test1Servlet";  
#         }

是么?

是的

问题补充:

你是指,在从servlet 跳转至该页面后,点击下拉菜单,选择一个值的时候,不会触发这下面这个:

引用

# function(){  
#           
#         $("#sel_emp").live('change',function(){  
#             var value = $('#sel_emp').val();  
#             alert(value);  
#             window.location = "/aa/servlet/Test1Servlet";  
#         }

是么?

是的

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