運行servlet應用程序時獲得空白屏幕

我剛開始使用servlet，我是一個新手。我用一個調用servlet的提交按鈕開發了一個html頁面。這裏是它的html代碼。運行servlet應用程序時獲得空白屏幕

<html> 
<head> 
<title>A simple revision of servlets</title> 
</head> 
<body> 
<form method="POST" action="Idiot"> 
    <input type="SUBMIT"> 
</form> 
</body> 
</html>

部署描述符是如下命名爲web.xml中

<?xml version="1.0" encoding="UTF-8"?> 
<web-app xmlns="http://java.sun.com/xml/ns/javaee" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" 
version="2.5"> 
<servlet> 
<servlet-name>TangoCharlie</servlet-name> 
<servlet-class>com.example.web.Revise</servlet-class> 
</servlet> 
<servlet-mapping> 
<servlet-name>TangoCharlie</servlet-name> 
<url-pattern>/Idiot</url-pattern> 
</servlet-mapping> 
</web-app>

的servlet的代碼如下所示的被命名爲：Revise.java

package com.example.web; 

import javax.servlet.*; 
import javax.servlet.http.*; 
import java.io.*; 

public class Revise extends HttpServlet 
{ 
public void doPost(HttpServletRequest request,HttpServletResponse response) throws IOException,ServletException 
{ 
    response.setContentType("text/html"); 
    PrintWriter out=response.getWriter(); 
    //out.println("<html><body><h3>Hello</h3></body></html>"); 
    out.println("Hello"); 
} 
}

我一直保持着tomcat服務器的webapps中的以下目錄。 webapps-> Revision-> page.html中

webapps->Revision->WEB-INF->web.xml 

webapps->Revision->WEB-INF->classes->com->example->web->Revise.class

，當我在Mozilla Firefox瀏覽器運行page.html中並點擊提交，我得到了一個空白頁面。當我在Chrome運行page.html中，我得到以下信息：

Server error 
The website encountered an error while retrieving http://localhost:8080/Revision/Idiot.It may be down for maintenance or configured incorrectly. 
Here are some suggestions: 
Reload this webpage later. 
HTTP Error 500 (Internal Server Error): An unexpected condition was encountered while the server was attempting to fulfill the request.

如果我錯了???

來源

2012-10-22 Insane Coder

你有stacktrace嗎？如果是這樣，請發佈。 – mthmulders

http：// localhost：8080/Revisio/Idiot拼寫檢查「修訂」？ – Metalhead

@Metalhead：我檢查了正確的拼寫。這不是問題其次，我正在屏幕上獲取html頁面，並且我沒有直接訪問servlet。請參閱它通過部署描述符映射。單擊提交按鈕 –