java+jquery method of processing xml data-JS Tutorial-php.cn

java+jquery method of processing xml data

亚连

Release： 2018-05-25 13:48:11

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This article mainly introduces the method of java jquery processing xml data. It analyzes the techniques of Ajax processing XML data with examples. It has certain reference value. Friends in need can refer to it.

The examples of this article describe java jquery's method of processing xml data. Share it with everyone for your reference. The specific implementation method is as follows:

1. AjaxJqueryXml.js is as follows:

function verify(){  
    //1.获取文本框中的内容  
    //jquery查找节点的方式，参数加#加上id属性可以找到一个节点  
    //jquery的方法返回的都是jquery的对象，可以继续在上面执行其他的jquery方法  
    var jqueryObj = $("#userName");  
    //获取节点的值  
    var userName = jqueryObj.val();  
    //alert(userName);  
    //2.将文本框中的数据发送给服务遄的servlet  
    //使用jquery的XMLHTTPrequest对象get请求的封装  
    //$.get("servlet/AjaxServlet?name="+userName,null,callback);  
    //使用jquery的xmlhttprequest对象get请求的封装  
    //var obj = {name:"123",age:20};  
    $.ajax({  
        type: "POST",  
        url: "servlet/AjaxXmlServlet",  
        data: "name=" + userName,//发送给服务端的数据  
        dataType: "xml",//告诉jquety返回的数据格式  
        success: callback//定义交互完成，并且服务端在下返回数据的回调函数 
    });  
}  
// 回调函数  
function callback(data){  
    //3.接收服务器端返回的数据  
    //alert("服务器端的数据回来了！")  
    //需要将data这个对象中的数据解析出来  
    //首先需要将dom的对象转换成jquery的对象  
    var jqueryObj = $(data);  
    //获取message节点  
    var message = jqueryObj.children();  
    //获取文本内容  
    var text = message.text();  
    //4.将服务器返回的数据动态的显示在网页上  
    //找到保存结果信息的节点  
    var resultObj = $("#result");  
    //动态的改变页面中p节点的内容  
    resultObj.html(text);  
    //alert("");  
}

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2. AjaxXmlServlet.java is as follows:

package com.panlong.servlet;  
import java.io.IOException;  
import java.io.PrintWriter;  
import javax.servlet.ServletException;  
import javax.servlet.http.HttpServlet;  
import javax.servlet.http.HttpServletRequest;  
import javax.servlet.http.HttpServletResponse;  
public class AjaxXmlServlet extends HttpServlet {  
    private static final long serialVersionUID = 1L;  
    protected void doGet(HttpServletRequest req, HttpServletResponse resp)  
            throws ServletException, IOException {  
            Integer total = (Integer) req.getSession().getAttribute("total");  
            int temp = 0;  
            if(total == null ){  
                temp = 1;  
            }else{  
                temp = total.intValue() + 1;  
            }  
        req.getSession().setAttribute("total",total.intValue()+temp);  
        try {  
            //1.取参数  
            resp.setContentType("text/xml;charset=GB2312");  
            PrintWriter out = resp.getWriter();  
            StringBuilder builder = new StringBuilder();  
            String old = req.getParameter("name");  
            //2、检查参数是否有问题  
            String name = old;  
            builder.append("<message>");  
            if("".equals(old) || old == null){  
                builder.append("用户名必须输入").append("</message>");  
                  
            }  
            else      
                 {  
            if("lila".equals(name)){  
                builder.append("该用户名已经注册").append("</message>");
            }else{  
                    builder.append("该用户名未注册，您可以注册["+name+"]这个用户名").append("</message>");  
            }  
         }  
            out.println(builder.toString());  
          
        }catch (Exception e) {  
            e.printStackTrace();  
        //3.检验操作  
        }  
    }  
    protected void doPost(HttpServletRequest req, HttpServletResponse resp)  
            throws ServletException, IOException {  
        doGet(req, resp);  
    }  
}

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3. Front-end html page

<!DOCTYPE html>  
<html>  
  <head>  
    <title>AJAX实例</title>
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">  
    <meta http-equiv="description" content="this is my page">  
    <meta http-equiv="content-type" content="text/html; charset=GB2312">
    <script type="text/javascript" src="js/AjaxJqueryXml.js"></script>  
    <script type="text/javascript" src="js/jquery.js"></script>  
    <!--<link rel="stylesheet" type="text/css" href="./styles.css">-->  
  </head>  
  <body>  
        <font color="blue" size="2">请输入用户名：</font>   
         <input type="text" id="userName" /><font color="red" size="2"><span id="result" >*</span></font><br/><br/>  
         <input type="submit" name="提交" value="提交"  onclick="verify()"/>  
  </body>  
</html>

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The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.

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