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本篇內(nèi)容主要講解“jquery怎么訪問servlet并返回?cái)?shù)據(jù)到頁面”,感興趣的朋友不妨來看看。本文介紹的方法操作簡單快捷,實(shí)用性強(qiáng)。下面就讓小編來帶大家學(xué)習(xí)“jquery怎么訪問servlet并返回?cái)?shù)據(jù)到頁面”吧!
本文實(shí)例講述了jquery訪問servlet并返回?cái)?shù)據(jù)到頁面的方法。分享給大家供大家參考。具體實(shí)現(xiàn)方法如下:
1. servlet:AjaxServlet.java如下:
復(fù)制代碼 代碼如下:
package com.panlong.servlet; import java.io.IOException; import java.io.PrintWriter; import java.net.URLDecoder; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class AjaxServlet 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",temp); try { //1.取參數(shù) resp.setContentType("text/html;charset=GBK"); PrintWriter out = resp.getWriter(); String old = req.getParameter("name"); //2.檢查參數(shù)是否有問題 //String name = new String(old.getBytes("iso8859-1"),"UTF-8"); String name = URLDecoder.decode(old,"UTF-8"); if("".equals(old) || old == null){ out.println("用戶名必須輸入"); }else{ if("liling".equals(name)){ out.println("恭喜登錄成功"); return; }else{ out.println("該用戶名未注冊,您可以注冊["+name+"]這個(gè)用戶名"+temp); } } } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } //3.檢驗(yàn)操作 } protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { doGet(req, resp); } }
2. verify.js如下:
復(fù)制代碼 代碼如下:
function verify(){ //解決中文亂碼問題的方法1,頁面端發(fā)出的數(shù)據(jù)作一次encodeURI,服務(wù)端使用new String(old.getBytes("iso8859-1"),"UTF-8"); //解決中文亂碼問題的方法2,頁面端發(fā)出的數(shù)據(jù)作兩次encodeURI,服務(wù)端使用String name = URLDecoder.decode(old,"UTF-8"); var url = "servlet/AjaxServlet?name="+encodeURI(encodeURI($("#userName").val())); url = convertURL(url); $.get(url,null,function(data){ $("#result").html(data); }); } //給url地址增加時(shí)間蒫,難過瀏覽器,不讀取緩存 function convertURL(url){ //獲取時(shí)間戳 var timstamp = (new Date()).valueOf(); //將時(shí)間戳信息拼接到url上 if(url.indexOf("?") >=0){ url = url + "&t=" + timstamp; }else{ url = url + "?t=" + timstamp; } return url; }
3. 前臺頁面如下:
復(fù)制代碼 代碼如下:
<!DOCTYPE html> <html> <head> <title>AJAX實(shí)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=GBK"> <script type="text/javascript" src="js/verify.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">請輸入用戶名:</font> <input type="text" id="userName" /><font color="red" size="2"><span id="result" >*</span></font><br/><br/> <!-- <div id="result"></div> --> <input type="submit" name="提交" value="提交" onclick="verify()"/> </body> </html>
到此,相信大家對“jquery怎么訪問servlet并返回?cái)?shù)據(jù)到頁面”有了更深的了解,不妨來實(shí)際操作一番吧!這里是億速云網(wǎng)站,更多相關(guān)內(nèi)容可以進(jìn)入相關(guān)頻道進(jìn)行查詢,關(guān)注我們,繼續(xù)學(xué)習(xí)!
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