Question

试用googleapp引擎的hello world教程。但是当我尝试使用已部署的应用程序时，会出现500服务器错误。

http://chemstest.appspot.com/

索引有效，但是servlet给了我错误。它用java编写。我在web.xml中看到了一些关于case错误的事情，但app name和java class都以小写命名。

servlet：

package com.chems.hellogoogleapp;

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

@SuppressWarnings("serial")
public class hellogoogleappServlet extends HttpServlet {
    public void doGet(HttpServletRequest req, HttpServletResponse resp)
            throws IOException {
        resp.setContentType("text/plain");
        resp.getWriter().println("Hello, James");
    }
}

的web.xml：

<?xml version="1.0" encoding="utf-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5">
    <servlet>
        <servlet-name>hellogoogleapp</servlet-name>
        <servlet-class>com.chems.hellogoogleapp.hellogoogleappServlet</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>hellogoogleapp</servlet-name>
        <url-pattern>/hellogoogleapp</url-pattern>
    </servlet-mapping>
    <welcome-file-list>
        <welcome-file>index.html</welcome-file>
    </welcome-file-list>
</web-app>

应用服务引擎的XML：

<?xml version="1.0" encoding="utf-8"?>
<appengine-web-app xmlns="http://appengine.google.com/ns/1.0">
  <application>chemstest</application>
  <version>1</version>

  <!--
    By default, App Engine sends requests serially to a given web server.
    To allow App Engine to send multiple requests in parallel specify:

      <threadsafe>true</threadsafe>
  -->

  <!-- Configure java.util.logging -->
  <system-properties>
    <property name="java.util.logging.config.file" value="WEB-INF/logging.properties"/>
  </system-properties>

</appengine-web-app>

希望很容易解决？

谷歌应用程序引擎问候世界500服务器错误？

0 个答案: