Ajax Post请求处理

发布时间：2020-12-16 00:30:55 所属栏目：百科来源：网络整理

导读：测试页面： %@ page language="java" import="java.util.*" pageEncoding="UTF-8"%!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"html head titleAJax Post/title script type="text/javascript" function checkName(){ var xml_request =

测试页面：

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title>AJax Post</title>
    <script type="text/javascript">
         function checkName(){
        	    var xml_request = new XMLHttpRequest();
        	    var namevalue = document.getElementById("name").value;
        	    //xml_request.open("post","CheckServlet?name=zhangsan",true);
        	    xml_request.open("post","CheckServlet",true);
        	    //必须写到 send之前
        	    xml_request.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
        	    xml_request.send("name="+namevalue);
        	    xml_request.onreadystatechange = function(){
        	    	if(xml_request.readyState==4&&xml_request.status==200){
        	    		var name1 = xml_request.responseText; //关注此处
        	    		alert(name1+"sdnda");
        	    		alert(namevalue);
        	    		alert(name1==(namevalue+"rn"))
        	    		document.getElementById("result").innerHTML=xml_request.responseText;
        	    	}
        	    }
         }
    </script>
  </head>
  
  <body>
     <input type="text" name="name" id="name" onblur="checkName();"> <span id="result"></span>
  </body>
</html>

Servlet进行处理代码：

package com.bwie;

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

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

public class CheckServlet extends HttpServlet {
	public void doPost(HttpServletRequest request,HttpServletResponse response)
			throws ServletException,IOException {
		response.setContentType("text/html");
		request.setCharacterEncoding("UTF-8"); //设置请求编码
		response.setCharacterEncoding("UTF-8");//设置响应编码
		System.out.println(request.getCharacterEncoding());;
		System.out.println(response.getCharacterEncoding());
		String name = request.getParameter("name");
		System.out.println(name);
		//new String("ab".getBytes("ISO-8859-1"),"UTF-8");
		//URLEncoder.encode("abc","UTF-8");
		PrintWriter out = response.getWriter();
		out.println(name);
		out.flush();
		out.close();
	}

}

（编辑：李大同）

【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容!