无法制作一个简单的HelloWorld jetty webapp

时间:2013-11-26 07:16:08

标签: java servlets

我正在尝试在我的jetty v9.1中部署一个简单的Helloworld webapp。我在尝试访问servlet时遇到问题,我收到了一条错误消息:

HTTP错误404

访问/ HelloServlet / servlet时遇到问题。原因是:

Not Found

我知道我在这里做错了什么,但我不知道是什么。

这是我在jetty中的Webbapp的文件结构:

  

webapps

     
    

+实例

         
      

+你好

             
        

的hello.xml         的index.html         + WEB-INF

                 
          

的web.xml           +类

                     
            

HelloServlet.class

          
        
      
    
  

index.html + WEB-INF(代表一个文件夹,WEB-INF和一个文件index.html,在同一个文件夹中你好)

这是我的web.xml

<?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 http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" 
version="2.5">
<display-name>Example</display-name>

<!-- Declaraa existenta unui servlet. -->
<servlet>
    <servlet-name>HelloServlet</servlet-name>
    <servlet-class>HelloServlet</servlet-class>

</servlet>

<!-- Map URLs to that servlet. -->
<servlet-mapping>
    <servlet-name>servlet</servlet-name>
    <url-pattern>/servlet</url-pattern>
</servlet-mapping>


HelloServlet.java

import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;

public class HelloServlet extends HttpServlet {

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {

   String input=request.getParameter("input");
   PrintWriter out=response.getWriter();

   out.println("<html>");
   out.println("<body>");
   out.println("The parameter input was \" "+input+"\" .");
   out.println("</body");
   out.println("</html");

}


protected void doPost(HttpServletRequest request,HttpServletResponse response) throws IOException {

    String field=request.getParameter("field");
    PrintWriter out=response.getWriter();

    out.println("<html>");
    out.println("<body>");
    out.println("You entered \" "+field+"\" into the text box.");
    out.println("</body>");
    out.println("</html>");

}

}

的index.html

<html>
<head>
    <title>Example Web Application</title>
</head>

<body>
    <p>This is a static document with a form in it.</p>
    <form method="POST" action="servlet">
        <input name="field" type="text" />
        <input type="submit" value="Submit" />
    </form>
</body>
</html>

的hello.xml

<<?xml version="1.0"  encoding="ISO-8859-1"?>
<<!DOCTYPE Configure PUBLIC "-//Jetty//Configure//EN" "http://www.eclipse.org/jetty/configure_9_0.dtd">



<<Configure class="org.eclipse.jetty.webapp.WebAppContext">
<Set name="contextPath">/hello</Set>
<Set name="extractWAR">false</Set>
<Set name="copyWebDir">false</Set>
<Set name="defaultsDescriptor"><Property name="jetty.home" default="."/>/etc/webdefault.xml</Set>
<Call name="setAttribute">
<Arg>org.eclipse.jetty.websocket.jsr356</Arg>
<Arg type="Boolean">true</Arg>
</Call>

<Get name="securityHandler">
<Set name="loginService">
  <New class="org.eclipse.jetty.security.HashLoginService">
    <Set name="name">Test Realm</Set>
    <Set name="config"><SystemProperty name="jetty.base" default="."/>/etc/realm.properties</Set>
  </New>
</Set>
<Set name="authenticator">
  <New class="org.eclipse.jetty.security.authentication.FormAuthenticator">
    <Set name="alwaysSaveUri">true</Set>
  </New>
</Set>
<Set name="checkWelcomeFiles">true</Set>
</Get>

</Configure>

2 个答案:

答案 0 :(得分:3)

web.xml中,您将url-pattern指定为/servlet/*,这意味着您需要使用的前缀是servlet/,而不是HelloServlet/

http://localhost:8080/servlet/servlet

(尽管可以手动编写servlet,但对于真实世界的项目来说,最好选择像Spring这样已经完成所有管道工作的系统。)

答案 1 :(得分:0)

毕竟我设法找到了解决方案,我的问题得到解决。我刚刚从Intellij Idea启动了服务器,一切都运行良好。

谢谢大家的帮助。