@WebServlet注释和错误404

发布于 2024-12-07 15:09:19 字数 601 浏览 0 评论 0原文

首先：我使用 GlassFish 3.1 + Eclipse Java EE indigo。我想用 javaee 测试缓存解决方案，所以我制作了一个虚拟应用程序。我有一个很大的生成数据库，我列出、搜索、修改等一些数据。为此，我编写了一些基本的 servlet，并使用 GET 参数进行调用。例如：/app/list?page=product&pageSize=100 ListServlet 带有注释

@WebServlet({ "/ListServlet", "/list" })

，它的工作方式就像一个魅力，我可以使用这两个 url。所以我需要一些额外的servlet（用于搜索、修改）。我创建了它们并以相同的方式进行注释。但是当我输入 url http://localhost/app/modify 或 /app/search?id=1 时，我收到错误 404。我尝试编写一个非常虚拟的 helloservlet，它打印一条 hello world 消息，但它不起作用：错误 404。我重新启动了 glassfish 服务器和计算机，但没有帮助。

有什么问题吗？我错过了什么吗？

编辑： servlet 是相同的包，使用相同的导入...

原文

First of all: I use GlassFish 3.1 + Eclipse Java EE indigo.
I want to testing cache solutions with javaee so I made a dummy app. I have a big generated database and I list, search, modify, etc some data. To do that I wrote some basic servlet and I call with GET parameters. e.g.: /app/list?page=product&pageSize=100
The ListServlet is annotated with

@WebServlet({ "/ListServlet", "/list" })

and it works like a charm, I can use both urls.
So I need some additional servlet (for search, modify). I created them and annotated the same way.
But when I type the url http://localhost/app/modify or /app/search?id=1 I get error 404.
I tried to write a very dummy helloservlet which is print a hello world message but it didn't work: error 404. I restarted the glassfish server and the computer but not helped.

What's the problem? Did I miss something?

EDIT:
the servlets are the same package uses the same imports...

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泅人 2024-12-14 15:09:19

您确定您的网址模式正确吗？尝试这样的事情：

@WebServlet( name="ListServlet", displayName="ListServlet", urlPatterns = {"/list","/modify", "/search"}, loadOnStartup=1)

如果您希望所有模式都进入同一个 servlet。如果没有，您将必须为每个模式使用不同的 servlet，并且我猜这些 servlet 应该以不同的方式命名。

无论如何，对于这种行为，我建议使用 Restlet 路由。

编辑：

我测试过。在这里，我的 servlet 工作起来就像一个魅力：

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@WebServlet(asyncSupported = false, name = "HelloServlet1", urlPatterns = {"/hello1"})
public class TestServlet extends HttpServlet {

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        resp.setContentType("text/html");
        PrintWriter out = resp.getWriter();
        out.write("<h2>Hello Servlet One </h2>");
        out.close();
    }


}

第二个：

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@WebServlet(asyncSupported = false, name = "HelloServlet2", urlPatterns = {"/hello2"})
public class TestServlet2 extends HttpServlet {

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        resp.setContentType("text/html");
        PrintWriter out = resp.getWriter();
        out.write("<h2>Hello Servlet Two </h2>");
        out.close();
    }


}

我确实这样称呼它们： http://localhost: 8080/eetest/hello1 和 http://localhost:8080/eetest/hello2 并且它们打印分别为“Hello Servlet One”和“Hello Servlet Two”。
（在 JBoss AS 7 - 网络配置文件上测试）

Are you sure your url patterns are correct? Try something like this:

@WebServlet( name="ListServlet", displayName="ListServlet", urlPatterns = {"/list","/modify", "/search"}, loadOnStartup=1)

If you want all the patterns go into the same servlet. If not, you would have to have a different servlets for each pattern, and those servlets should be named differently I guess.

Anyway, for this kind of behaviour I would recommend using for example Restlet routing.

EDITED:

I tested it. Here you have my servlets working like a charm:

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@WebServlet(asyncSupported = false, name = "HelloServlet1", urlPatterns = {"/hello1"})
public class TestServlet extends HttpServlet {

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        resp.setContentType("text/html");
        PrintWriter out = resp.getWriter();
        out.write("<h2>Hello Servlet One </h2>");
        out.close();
    }


}

and the second one:

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@WebServlet(asyncSupported = false, name = "HelloServlet2", urlPatterns = {"/hello2"})
public class TestServlet2 extends HttpServlet {

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        resp.setContentType("text/html");
        PrintWriter out = resp.getWriter();
        out.write("<h2>Hello Servlet Two </h2>");
        out.close();
    }


}

I do call them like: http://localhost:8080/eetest/hello1 and http://localhost:8080/eetest/hello2 and they print 'Hello Servlet One' and 'Hello Servlet Two' respectivelly.
(tested on JBoss AS 7 - web profile)

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