有关ajax在jquery中的请求（详细教程）

在jsp中，首先，你需要导入jquery的架包：

获取可返回站点的根路径：

<% 
 String path = request.getContextPath(); 
%>

在jquery中写ajax请求：

<script type="text/javascript">
 $(function(){
 $(".B").click(function(){
 $.ajax({
 type: "GET",
 //对应servlet中的方法
 url: "<%=path%>" + "/queryEvaluateByuserId.do",
 //返回是json数据
 dataType: "json",
 async:false,
 data:{
 },
 success: function(data){
 str = "";
 if(data != null){
 //循环表单列表
 for (var i in data)
 {
 var num = parseInt(i) + 1 ; 
 str +="<tr><td>" + num + "</td><td>" 
 + data[i]['name'] + "</td><td>"
 + data[i]['price'] + "元</td>" 
 + "</tr>";
 }
 $(".trtd4").after(str);
 }else{
 
 }
 
 },
 error: function(data){
 }
 }) 
 });
 }
</script>

jsp部分：

<p class="tab-pane" id="B" style="text-align:center;"> 
 <p class="row marg" > 
 <table border="2 " style="width:80%;text-align:center;"> 
 <tr class="trtd4"> 
 <th>序号</th> 
 <th>业主名</th> 
 <th>金额</th> 
 </tr> 
 </table> 
 </p> 
 </p>

在servlet中用到了阿里巴巴的快速转换json的包com.alibaba.fastjson.JSON：

private void queryEvaluateByuserId(HttpServletRequest request, HttpServletResponse response) throws SQLException, IOException, ServletException{
	HttpSession session=request.getSession();
	request.setCharacterEncoding("UTF-8");
	response.setContentType("text/html");
	response.setCharacterEncoding("UTF-8");
	Cookie[] cookies = request.getCookies();
	int ownerId = 0;
	for (int i = 0; i < cookies.length; i++) {
	 Cookie cookie = cookies[i];
	 if (cookie.getName().equals("ownerId")) {
	 	ownerId = Integer.parseInt(cookie.getValue()); 
	 }
	}
	List<Order> orderList = new ArrayList<>();
	List<Evaluate> queryEvaluateList = new ArrayList<>();
	orderList = orderServiceImpl.queryOrderList(ownerId, null, null, null, null, null);
	List<Map<String, String>> workers = new ArrayList<Map<String, String>>(); 
	for(int i = 0;i < orderList.size();i++){
	Map<String,String> order = new HashMap<String, String>();
	order.put("description", orderList.get(i).getDescription());
	order.put("name", orderList.get(i).getOwnerName());
	System.out.println(orderList.get(i).getDescription());
	order.put("type",orderList.get(i).getTypeName());
	queryEvaluateList = orderServiceImpl.queryEvaluateListByUserId(orderList.get(i).getId());
	order.put("comment", queryEvaluateList.get(0).getComment());
	List<Allocation> allocation = orderServiceImpl.queryAllocationByOrderId(orderList.get(i).getId());
	order.put("price", String.valueOf(allocation.get(0).getPrice()));
	 System.out.println(order);
	workers.add(order);
	}
 //将map键值对转换成json，传给jsp
 response.getOutputStream().write(JSON.toJSONBytes(workers));
	}

上面是我整理给大家的，希望今后会对大家有帮助。

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