ajax的两种提交方式(get/post)和两种版本-巨人网络通讯

ajax的两种提交方式(get/post)和两种版本

最近比较闲，就把以前用过的技术串一下做个手札，方便以后自己偷懒，小鸟你们幸福了。

首先主要是将javascript版本ajax做下注释：ajax异步刷新主要是将所需条件拼成字符串传入后台，处理之后，直接调用回调函数将所得数据返还给页面，并加以显示，因为还在本页面，所以不用刷新页面，懂了了吧，本篇也用encodeURI对字符串做了加密，并在类里做了解码，其中需要一些注意的地方在源码里做了注释。get/post两种提交方式，但get提交容易乱码，一定多加注意

jsp页面：

复制代码代码如下:

 
%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> 
% 
String path = request.getContextPath(); 
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; 
%> 

!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 
html> 
head> 
base href="%=basePath%>"> 
script type="text/javascript" > 
var xmlHttp; 
function createxmlHttpRequest(){ 
if(window.XMLHttpRequest){ 
xmlHttp= new XMLHttpRequest();//IE7+,FireFox,Opera,Safari,Chrome 
}else{ 
xmlHttp=new ActiveXObject("Microsoft.XMLHTTP"); 
} 
} 
function test(){//get 
//获取参数 
//var unames=encodeURI(document.getElementById("username").value);//一次编码java用new String(name.getBytes("ISO8859-1"), "UTF-8"）解码 
var unames=encodeURI(encodeURI(document.getElementById("username").value));//两次编码才能用java.net.URLDecoder.decode(name,"utf-8");解码 
var pws=encodeURI(document.getElementById("password").value); 
createxmlHttpRequest(); 
xmlHttp.onreadystatechange=readyState; 
//function(){ 
//alert(xmlHttp.readyState+"=="+xmlHttp.status);//判断请求状态 
//} 
xmlHttp.open("get","AjaxServlet1?msg=getsname="+unames+"pwd="+pws+"timeStamp="+new Date().getTime(),true); //get 方式提交中文会出现乱码，encodeURI()/encodeURIComponent()将中文转成16进制编码，把字符串作为URI进行编码 
xmlHttp.send(null); 
} 
function testp(){//post 
//获取参数 
var unames=document.getElementById("username").value; 
var pws=document.getElementById("password").value; 
createxmlHttpRequest(); 
xmlHttp.onreadystatechange=readyState; 
xmlHttp.open("post","AjaxServlet1",true); 
xmlHttp.setRequestHeader("Content-type","application/x-www-form-urlencoded"); 
var str="msg=postsname="+unames+"pwd="+pws+"timeStamp="+new Date().getTime(); 
xmlHttp.send(str);//send 可用于传参 
} 

function readyState(){ 
if(xmlHttp.readyState==4){ 
if(xmlHttp.status==200){ 
var msg= xmlHttp.responseText; 
//alert(msg); 
document.getElementById("result").innerHTML=msg; 
} 
} 
} 
/script> 
title>js异步刷新/title> 
/head> 

body> 
center> 
div id="response"> 
/div> 
用户：input type="text" name="uname" id="username">br> 
密码：input type="text" name="pw" id="password">br> 
input type="button" name="button" value="get确定" onclick="test();"/> 
input type="button" name="button" value="post确定" onclick="testp();"> 
div id="result"> 
/div> 
/center> 
/body> 

/html> 

这里是servlet/action Java代码:

复制代码代码如下:

 
package com.cstp.javascript; 

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; 

@SuppressWarnings("serial") 
public class AjaxServlet1 extends HttpServlet { 

public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException { 
this.doPost(request, response); 
} 

public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException { 
//设置编码，防止乱码 
response.setCharacterEncoding("utf-8"); 
request.setCharacterEncoding("utf-8"); 
//接收参数 
String msg=request.getParameter("msg"); 
if(msg.equals("gets")){ 
// String name=new String(request.getParameter("name").getBytes("ISO8859-1"), "UTF-8"); //一次编码，java里进行解码操作 
String name=java.net.URLDecoder.decode(request.getParameter("name"),"utf-8"); //decode解码页面必须两次编码，java里进行解码操作 
String pwd=request.getParameter("pwd"); 
System.out.println(name+","+pwd); 
PrintWriter out = response.getWriter(); 
out.println("ajax响应get，结果返回"+name+","+pwd); 
}else if(msg.equals("posts")){ 
String name=new String(request.getParameter("name").getBytes("utf-8"), "UTF-8"); //一次编码，java里进行解码操作 
String pwd=request.getParameter("pwd"); 
System.out.println(name+","+pwd); 
PrintWriter out = response.getWriter(); 
out.println("ajax响应post，结果返回"+name+","+pwd); 
} 

} 
} 

上面是javascript版ajax，下面将喜欢jquery版的也分享给JQ友们：

页面上：

复制代码代码如下:

 
script type="text/javascript"> 
//方式① 
function circum(lon,lat){ 
$.ajax({ 
url: "JQAjaxServlet?method=jsons", 
contentType: "application/x-www-form-urlencoded; charset=utf-8", 
type : 'post', 
dataType:"json", 
async: false, 
data : { //传参给后台 
'lon' : lon, 
'lat' : lat 
}, 
success: function (data) { // 接后台返回result 
在这里data为后台返回数据，你可以尽情处理了 
} 
}); 
} 

/script> 