我写了一个Servlet的程序如下
- C# code
import java.io.*;import javax.servlet.*;import javax.servlet.http.*;public class CounterServlet extends HttpServlet { private static final String CONTENT_TYPE = "text/html; charset=GBK"; private int number; public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType (CONTENT_TYPE); PrintWriter out = response.getWriter(); int n = 1; number = Integer.parseInt(request.getParameter("DATA")); for (int i = 1; i <= number; i++) { n *= i; } out.println("<h2 align='center'>" + "计算结果" + "</h2>"); out.println("<html>"); out.println("<head><title>TestServlet</title></head>"); out.println("<body>"); out.println("<P>"+number +"! = " + n + "</P>"); out.println("</body></html>"); out.close(); }}然后 javac CounterServlet.java编译后放在D:\tomcat\webapps\ROOT\coun\WEB-INF\CLASSES这个文件夹里
然后在D:\tomcat\webapps\ROOT\coun\WEB-INF这个文件夹里放一个WEB.XML文件，文件内容为
- C# code
<servlet> <servlet-name>CounterServlet</servlet-name> <servlet-class>CounterServlet</servlet-class></servlet><servlet-mapping> <servlet-name>CounterServlet</servlet-name> <url-pattern>/CounterServlet</url-pattern></servlet-mapping>
然后再在D:\tomcat\webapps\ROOT\coun中方一个coun.html文件
文件内容为
- HTML code
<html><head><title>网上购物</title></head><body bgcolor="white"><table border="10" cellpadding="10" align="CENTER"><tr><td width="275"><h2>商品信息查询</h2><br>输入你要查询的信息<br><form method="post" action="CounterServlet"> <input type= "text" name="DATA" size=30> <p><input type="SUBMIT" value= "查询"> <input type="RESET" value= "重新输入"> </form> </td></tr> </table> </body> </html>
我运行http://localhost:8080/和http://localhost:8080/coun/coun.html都可以显示
但是在coun.html中输入5点查询，不能显示结果,??
显示下面的错误
HTTP Status 404 - /coun/CounterServlet
--------------------------------------------
type Status report
message /coun/CounterServlet
description The requested resource (/coun/CounterServlet) is not available.
--------------------------------------------
Apache Tomcat/5.5.26
问了好多人都不知道原因？？
帮帮我啊，我弄了4天了～～
------解决方案--------------------
CounterServlet 这个类加上包结构
package test;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class CounterServlet extends HttpServlet
。。。。。。。。。。
编译后 吧 这个CounterServlet.class
放到 D:\tomcat\webapps\ROOT\coun\WEB-INF\CLASSES\test 下面
<servlet-class>CounterServlet</servlet-class>
改成<servlet-class>test.CounterServlet</servlet-class>
再试试
------解决方案--------------------