日期:2014-05-16 浏览次数:20574 次
本篇继续上篇讲解第二个应用,做一个简单的加法计算器,也是分别使用$.ajax(),$.get(),$.post()方法分别实现,与之前不同的是,现在要从前台输入要计算的数字,并且将计算结果返回到前台页面。
将html页面贴上来,如果前面一篇文章读懂了,这篇文章将非常容易:
<script type="text/javascript" src="js/jquery.js"></script> <title>Jquery和ajax完成简单的加法计算器</title> <script type="text/javascript"> $(document).ready(function(){ $("#btn1").click(function(){ $.ajax({ type:"GET", url:"ComputeServlet", dataType:"html", data:{num1:$("#num1").val(),num2:$("#num2").val()}, success:function(param) { $("#result").val(param); } }); }); $("#btn2").click(function(){ $.ajax({ type:"POST", url:"ComputeServlet", dataType:"html", data:{num1:$("#num1").val(),num2:$("#num2").val()}, success:function(param) { $("#result").val(param); } }); }); $("#btn3").click(function(){ $.get("ComputeServlet",{num1:$("#num1").val(),num2:$("#num2").val()},function(params){ $("#result").val(params); }); }); $("#btn4").click(function(){ $.post("ComputeServlet",{num1:$("#num1").val(),num2:$("#num2").val()},function(params){ $("#result").val(params); }); }); }); </script> </head> <body> <input type="text" name="num1" id="num1">+<input type="text" name="num2" id="num2">=<input type="text" name="result" id="result"><br> <input type="submit" value="计算1" id="btn1"> <input type="submit" value="计算2" id="btn2"> <input type="submit" value="计算3" id="btn3"> <input type="submit" value="计算4" id="btn4"> </body>
运行的的界面如下:
对于的servlet如下:
public class ComputeServlet extends HttpServlet { public void destroy() { super.destroy(); } public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { System.out.println("get++++++++++"); response.setContentType("text/html"); PrintWriter out = response.getWriter(); String num1=request.getParameter("num1"); String num2=request.getParameter("num2"); System.out.println("num1====>"+num1); System.out.println("num2====>"+num2); if(num1!=null && num2!=null) { out.print(Integer.parseInt(num1)+Integer.parseInt(num2)); } else { out.print("invalide"); } out.flush(); out.close(); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doGet(request, response); } public void init() throws ServletException { // Put your code here } }