Java的球衣休息：未找到提供者类。 （404错误访问URL时） [英] Java Jersey Rest : No provider classes found. (404 error when accessing URL)

问题描述

编辑：我没有意识到，所有的请求都首先进入阿帕奇，然后重定向到Tomcat中。我在 apache2.conf 文件添加一个新的重定向。详情请参阅接受的答案。

I hadn't realized that all request were first going into "Apache" and then were redirected to Tomcat. I added a new redirection in the apache2.conf file. See the accepted answer for details.

我有完全相同的问题，因为这个问题。
<一href=\"http://stackoverflow.com/questions/6111074/jersey-rest-the-resourceconfig-instance-does-not-contain-any-root-resource-classe\">Jersey其余ResourceConfig实例不包含任何根资源类
然而，用户永远不会回答了这个问题。

I am having the exact same problem as this question. Jersey REST The ResourceConfig instance does not contain any root resource classes However the user never answered the question.

我使用Tomcat，没有行家。我跟着这个教程。
<一href=\"http://www.ibm.com/developerworks/web/library/wa-aj-tomcat/index.html\">http://www.ibm.com/developerworks/web/library/wa-aj-tomcat/index.html

I am using Tomcat, without maven. I followed this tutorial. http://www.ibm.com/developerworks/web/library/wa-aj-tomcat/index.html

我做了修改web.xml中根据文章结果
即新的servlet和servlet映射与正确的包名称创建。

I made changes to web.xml as per the article
i.e the new servlet and servlet mapping was created with the correct package name.

<servlet>
  <servlet-name>Jersey REST Service</servlet-name>
<servlet-class>
  com.sun.jersey.spi.container.servlet.ServletContainer
</servlet-class>
  <init-param>
    <param-name>com.sun.jersey.config.property.packages</param-name>
    <param-value>sample.hello.resources</param-value>
  </init-param>
  <load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
  <servlet-name>Jersey REST Service</servlet-name>
  <url-pattern>/rest/*</url-pattern>
</servlet-mapping> 

我已经部署了以下jar文件到Tomcat

I have deployed the following jars to tomcat

asm.jar
jersey-server.jar
jersey-core.jar
jsr311.jar

Tomcat启动日志有以下例外情况。

The tomcat startup log has the following exceptions.

    com.sun.jersey.api.core.PackagesResourceConfig init
    INFO: Scanning for root resource and provider classes in the packages:
      sample.hello.resources

   com.sun.jersey.api.core.ScanningResourceConfig logClasses
    INFO: Root resource classes found:
      class sample.hello.resources.HelloResource

   com.sun.jersey.api.core.ScanningResourceConfig init
    INFO: No provider classes found.

   com.sun.jersey.server.impl.application.WebApplicationImpl _initiate
    INFO: Initiating Jersey application, version 'Jersey: 1.8 06/24/2011 12:17 PM'

在我访问的网址，我收到了404。
的http：//本地主机：8080 /新泽西/ REST /你好

When I access the URL I get a 404. http://localhost:8080/Jersey/rest/hello

在code：

import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;

@Path("/hello")
public class HelloResource {
    @GET
    @Produces(MediaType.TEXT_PLAIN)
    public String sayHello() {
        return "Hello Jersey";
    }
}  

我看不出在日志中其他异常

I do not see any other exceptions in the logs

推荐答案

这个问题就解决了​​如下。我的本地主机已经创建了阿帕奇网络服务器会被重定向到Tomcat的所有请求。由于泽西是用一个新的servlet，我不得不创建一个单独的重定向为这个servlet明确。

This issue was resolved as follows. My localhost has been setup with "Apache" webserver which redirects all requests to Tomcat. Since "Jersey" is using a new servlet, I had to create a separate redirect for this servlet specifically.

在Linux的

/etc/apache2/apache2.conf

地址：

JkMount /rest/* ajp13_worker

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