String path = request.getContextPath();

String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

%>

pageEncoding="utf-8"%>

html>

">

管理员查询

管理员查询

---

用户名密码类型操作

${user.username}${user.password}${user.usertype}删除

function refresh() {

$.ajax({

url:"/delUser",

type:"post",

data:{"username":$("input[name=yc]").val(),},

dataType:"json",

success:function(result){

var userList=eval(result);

var content=null;

for(var i in userList){

var name=userList[i].username;

var password=userList[i].password;

var usertype=userList[i].usertype;

content=content+"

"+name+""+password+""+usertype+""

}

$("#cont>tr").remove();

$("#cont").html(content);

}

});

}

package com.java.servlet;

import com.java.data.LocalCache;

import org.json.JSONObject;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import java.io.IOException;

import java.util.List;

import java.util.Objects;

public class SelectUsersServlet extends HttpServlet {

@Override

protected void service(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

if(Objects.equals(request.getServletPath(),"/SelectUsersServlet")){

List userList=LocalCache.getUser();

request.getSession().setAttribute("userList",userList);

request.getRequestDispatcher("views/biz/selectUsers.jsp").forward(request,response);

}else if(Objects.equals(request.getServletPath(),"/delUser")){

String username=request.getParameter("username");

System.out.println(username);

LocalCache.delUser(username);

List userList=LocalCache.getUser();

JSONObject jsonObject=new JSONObject(userList) ;

response.getOutputStream().write(jsonObject.toString().getBytes("utf-8"));

// request.getRequestDispatcher("views/biz/selectUsers.jsp").forward(request,response);

return;

}

}

}

点击删除后只显示一个{"empty":true} 不知道什么意思 ，然后根据控制台的打印，Servlet那边应该是接收了两次数据，第一次收到了正确的数据，并且删除了，第二次为空，请问下老师如何解决这些问题