[英]Test Google App Engine Java Backend on localhost
I am trying to test a Google App Engine Java Backend on my localhost. 我正在尝试在本地主机上测试Google App Engine Java后端。 I have the backend running, and I have a servlet written.
我正在运行后端,并且编写了一个servlet。
However, when I do a post to my backend to url: 但是,当我在后端发布到url的帖子时:
http://localhost:8888/MyServlet/
All I get is this: 我所得到的是这样的:
WARNING: No file found for: /MyServlet/
How do I actually call the backend to start a an instance for me so I can test it locally and do a post? 如何实际调用后端为我启动一个实例,以便可以在本地对其进行测试并发布信息?
Servlet: Servlet的:
import java.io.BufferedReader;
import java.io.IOException;
import javax.servlet.http.*;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
@SuppressWarnings("serial")
public class MyServlet extends HttpServlet {
public void doPost(HttpServletRequest req, HttpServletResponse resp)
throws IOException {
resp.setContentType("text/plain");
resp.getWriter().println("Hello, world");
}
web.xml: 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>MyBackend</servlet-name>
<servlet-class>com.test.backend.MyServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>test</servlet-name>
<url-pattern>/_ah/start</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
</welcome-file-list>
</web-app>
try to use both a servlet and servlet-mapping tags like this: 尝试同时使用servlet和servlet映射标签,如下所示:
<servlet>
<servlet-name>MyBackend</servlet-name>
<servlet-class>com.test.backend.MyServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>MyBackend</servlet-name>
<url-pattern>/MyServlet</url-pattern>
</servlet-mapping>
though i feel like suggesting not using words like servlet or backend in class names; 尽管我建议不要在类名中使用像servlet或backend这样的词; they are meaningless outside the context of a developer and do not give a clue about the functionality of the class
在开发人员的上下文之外,它们是毫无意义的,并且不提供有关类功能的线索
我还刚刚意识到您实现了doPost,它旨在处理表单提交,它不会像在浏览器中那样处理裸露的url请求,将您的方法更改为doGet或服务http://docs.oracle.com/javaee/ 5 / api / javax / servlet / http / HttpServlet.html
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