Ajax在JQuery中的应用（Get方法练习2）

发布时间：2020-12-16 03:36:26 所属栏目：百科来源：网络整理

导读：1.xml传递数据 index2.html !DOCTYPE htmlhtmlheadmeta charset="UTF-8"titletest get()/titlescript type="text/javascript" src="script/jquery-3.1.1.js"/scriptscript type="text/javascript" $(function() { $("input:eq(2)").click(function(){ $.get(

1.xml传递数据

index2.html

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>test get()</title>
<script type="text/javascript" src="script/jquery-3.1.1.js"></script>
<script type="text/javascript">
  $(function() {
    $("input:eq(2)").click(function(){
        $.get("GetXMLServlet",{'username':encodeURI(encodeURI($("#username").val())),'password':encodeURI(encodeURI($("#password").val()))
            },function(data,textStatus){
            var username=$(data).find("name").text();
            var password=$(data).find("password").text();//获取到xml传过来的数据
            $("#content").html("<p>用户名:"+username+",密码:"+password+"</p>");
            alert(textStatus);
        },"xml");
    });
});//服务器获得xml格式的数据
</script>
</head>
<body>
  <input type="text" name="username" id="username"/><br/>
  <input type="password" name="password" id="password"/><br/>
  <input type="button" value="登陆"/>
  <div id="content"></div>
</body>
</html>

GetXMLServlet.java

package com.login;

import java.io.IOException;
import java.io.PrintWriter;
import java.net.URLDecoder;

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

@WebServlet("/GetXMLServlet")
public class GetXMLServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;
    public GetXMLServlet() {
        super();
        // TODO Auto-generated constructor stub
    }
    protected void doGet(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException {
        // TODO Auto-generated method stub
        response.setContentType("text/xml;charset=utf-8");//浏览器传回的是xml格式
        response.setCharacterEncoding("utf-8");
        PrintWriter out=response.getWriter();
        request.setCharacterEncoding("utf-8");
        String username=URLDecoder.decode(URLDecoder.decode(request.getParameter("username"),"UTF-8"),"utf-8");//两次解码
        String password=URLDecoder.decode(URLDecoder.decode(request.getParameter("password"),"utf-8");
        StringBuilder xml=new StringBuilder("<?xml version="1.0" encoding="utf-8"?>n");//设置字符串初始值
        xml.append("<student>");
        xml.append("<name>"+username+"</name>");
        xml.append("<password>"+password+"</password>");
        xml.append("</student>");
        out.println(xml.toString());
        out.close();
    }
    protected void doPost(HttpServletRequest request,IOException {
        // TODO Auto-generated method stub
        doGet(request,response);
    }

}

截图：

2.JSON传递数据

index3.html

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>test get()</title>
<script type="text/javascript" src="script/jquery-3.1.1.js"></script>
<script type="text/javascript">
  $(function() {
    $("input:eq(0)").click(function(){
        $.get("GetJSONServlet",textStatus){
            var students=data.students;
            var res="<ul>n";
            for(var i=0;i<students.length;i++)
            {
                var student=students[i];
                res+="<li>"+student.name+"--"+student.password+"</li>n";
            }
            res+="</ul>";
            //标签生成节点对象
            $(res).appendTo($("#content"));
            alert(textStatus);
        },"json");
    });
});
</script>
</head>
<body>
  <input type="button" value="getJSON"/>
  <div id="content"></div>
</body>
</html>

GetJSONServlet.java

package com.login;

import java.io.IOException;
import java.io.PrintWriter;
import java.net.URLDecoder;

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

@WebServlet("/GetJSONServlet")
public class GetJSONServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;
    public GetJSONServlet() {
        super();
        // TODO Auto-generated constructor stub
    }
    protected void doGet(HttpServletRequest request,IOException {
        // TODO Auto-generated method stub
        response.setContentType("application/json;charset=utf-8");//浏览器传回的是xml格式
        response.setCharacterEncoding("utf-8");
        PrintWriter out=response.getWriter();
        out.println("{"students":[{"name":"haige","password":"1234"},{"name":"lisi","password":"1452"},{"name":"zhangsan","password":"1478"}]}");
        out.close();
    }
    protected void doPost(HttpServletRequest request,response);
    }

}

截图：

（编辑：李大同）

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