sverlet 如何将自定义的请求内容返回客户端？

xzwsun 2009-04-14 04:53:56

我通过一个类在客户端向servlet 发出请求，Servlet 处理完后，返回 “处理成功”的字符串。

server 和 client 应如何写?

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BAO_YY 2009-04-14

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满详细的! 顶

huangan0301 2009-04-14

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用EL标签，或者request.getAttribute("name");

AsheBin 2009-04-14

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世界上真有这么执著的.......

xxm712 2009-04-14

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牛

richard_2010 2009-04-14

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ls的太详细了。。。

yxc0433 2009-04-14

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客户端写个一jsp页面
//提交你的表单，假设是a,b



 <form  action="myjsp.jsp"  method = "post" >

  

   please enter a:<input type="text" name="a">

   please enter b:<input type="text" name="b">

    <input type="submit"  >



  </form>

提交到web服务器交给servlet处理



package com.number.servlet;

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;





public class Number extends HttpServlet{

	public void doGet(HttpServletRequest request,HttpServletResponse response)

	throws ServletException,IOException

	{        

		/*做你所要做的东西*/

		PrintWriter out = response.getWriter();

                out.println("处理成功")

		

	 

       public void doPost(HttpServletRequest request, HttpServletResponse response)

       throws ServletException, IOException

       {

       doGet(request, response);

	 	

       }



}

web.xml



  <servlet>

    <servlet-name>first</servlet-name>

    <servlet-class>com.number.servlet.Number</servlet-class>

  </servlet>

  <servlet-mapping>

    <servlet-name>first</servlet-name>

    <url-pattern>/first</url-pattern>

   </servlet-mapping>

applerockhool 2009-04-14

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客户端代码：

<html>

	<head>

		<base href="<%=basePath%>">



		<title>欢迎使用</title>



		<meta http-equiv="pragma" content="no-cache">

		<meta http-equiv="cache-control" content="no-cache">

		<meta http-equiv="expires" content="0">

		<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">

		<meta http-equiv="description" content="This is my page">

		<!--

	<link rel="stylesheet" type="text/css" href="styles.css">

	-->





	</head>

	<script language="javascript">

			function validation(myform){

			if(myform.name.value.length==0){

				alert("请填写用户名！");

				myform.name.focus();

				return false;

			}

			if(myform.password.value.length==0){

				alert("请填写密码！");

				myform.password.focus();

				return false;

			}

			}

         

         function setFalse(){

             if(document.form1.name.value.length!=0 && document.form1.password.value.length!=0){

                  document.getElementById("s").disabled=false;

             }

         }

         

          function setTrue(){

             if(document.form1.name.value.length!=0 && document.form1.password.value.length!=0){

                  document.getElementById("s").disabled=true; 

             }

         }

         

         

   </script>



	<body>

		<h1 align="center">

			欢迎登陆

		</h1>

		<br>

		<br>

		<form id="form1" name="form1" method="post"

			action="servlet/LoginServlet" onsubmit="return validation(this)">



			<table align="center">



				<tr>

					<td>

						用户名:

					</td>

					<td>

						<input type="text" name="name" onmouseout="setFalse()">

					</td>

				</tr>

				<tr>

					<td>

						密 码：

					</td>

					<td>

						<input type="password" name="password" onmouseout="setFalse()">

					</td>

				</tr>

				<tr>

					<td>

						<input type="submit" value="登陆" id="s" disabled>

					</td>

					<td>

						<input type="reset" value="重置" onclick="setTrue()">

					</td>

				</tr>

			</table>



		</form>

	</body>

</html>

]

客户端servlet：

package com.handlewell.control;



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;



public class Serv extends HttpServlet {



	/**

	 * Constructor of the object.

	 */

	public Serv() {

		super();

	}



	/**

	 * Destruction of the servlet. <br>

	 */

	public void destroy() {

		super.destroy(); // Just puts "destroy" string in log

		// Put your code here

	}



	/**

	 * The doGet method of the servlet. <br>

	 * 

	 * This method is called when a form has its tag value method equals to get.

	 * 

	 * @param request

	 *            the request send by the client to the server

	 * @param response

	 *            the response send by the server to the client

	 * @throws ServletException

	 *             if an error occurred

	 * @throws IOException

	 *             if an error occurred

	 */

	public void doGet(HttpServletRequest request, HttpServletResponse response)

			throws ServletException, IOException {



		this.doPost(request, response);

	}



	/**

	 * The doPost method of the servlet. <br>

	 * 

	 * This method is called when a form has its tag value method equals to

	 * post.

	 * 

	 * @param request

	 *            the request send by the client to the server

	 * @param response

	 *            the response send by the server to the client

	 * @throws ServletException

	 *             if an error occurred

	 * @throws IOException

	 *             if an error occurred

	 */

	public void doPost(HttpServletRequest request, HttpServletResponse response)

			throws ServletException, IOException {



		response.setContentType("text/html");

		PrintWriter out = response.getWriter();

		out.print("处理成功！！");

		out.flush();

		out.close();

	}



	/**

	 * Initialization of the servlet. <br>

	 * 

	 * @throws ServletException

	 *             if an error occurs

	 */

	public void init() throws ServletException {

		// Put your code here

	}



}