利用Ajax检测用户名是否被占用的完整实例_AJAX相关_

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 package com.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); } }