适合人群：Ajax和jQuery入门
采用Ajax实现用户名验证
使用jQuery给出提示信息
用户注册的时候，使用Ajax实现检测用户名是否已经被注册过，很多细节没有实现，给大家做个简单普及。
<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://.ambow.servlet; import java.io.IOException;import java.io.PrintWriter; 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("/ValidateServlet")public class ValidateServlet extends HttpServlet { private static final long serialVersionUID = 1L; public ValidateServlet() { super(); } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { PrintWriter pw = response.getWriter(); String account = request.getParameter("account"); System.out.println("account"+account); if("123".equals(account)) { pw.print("true"); }else { pw.print("false"); } } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); }}到此这篇关于利用Ajax检测用户名是否被占用的文章就介绍到这了,更多相关Ajax检测用户名被占用内容请搜索以前的文章或继续浏览下面的相关文章希望大家以后多多支持！
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