Java 仅返回404的Web服务_Java_Rest_Tomcat_Jersey_Http Status Code 404

Java 仅返回404的Web服务

java rest tomcat jersey

Java 仅返回404的Web服务,java,rest,tomcat,jersey,http-status-code-404,Java,Rest,Tomcat,Jersey,Http Status Code 404,我在这里读到了一些关于这个问题的问题，我坚信这里的情况并非如此。我有一节课是这样的： package Rest; import javax.ws.rs.GET; import javax.ws.rs.Path; import javax.ws.rs.PathParam; import javax.ws.rs.core.Response; @Path("/hello") public class HelloWorldService { @GET @Path("/{param}

我在这里读到了一些关于这个问题的问题，我坚信这里的情况并非如此。我有一节课是这样的：

package Rest;

import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.core.Response;

@Path("/hello")
public class HelloWorldService {

    @GET
    @Path("/{param}")
    public Response getMsg(@PathParam("param") String msg) {

        String output = "Jersey say : " + msg;

        return Response.status(200).entity(output).build();

    }

}

我的

web.xml

：

<web-app id="WebApp_ID" version="2.4"
  xmlns="http://java.sun.com/xml/ns/j2ee"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
  http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

    <display-name>Restful Web Application</display-name>

    <servlet>
        <servlet-name>jersey-serlvet</servlet-name>
        <servlet-class>
            org.glassfish.jersey.servlet.ServletContainer
        </servlet-class>
        <init-param>
            <param-name>jersey.config.server.provider.packages</param-name>
            <param-value>Rest</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>jersey-serlvet</servlet-name>
        <url-pattern>/rest/*</url-pattern>
    </servlet-mapping>

</web-app>

我在Tomcat v9.0中使用了Jersey 2.xx

我尝试了一些URL，如：

始终显示404未找到

知道为什么吗？

正如@Libin所说：

@路径（“/{param}”）应为@Path（“{param}”）

解决了

我建议在tomcat管理器中检查上下文根“restest”是否正确。@AlexR hi，我使用eclipse构建这个项目，但我不知道它是否正确，但我在Web项目设置/context root中检查了eclipse，它确实是restest。@Path（“/{param}”）应该是@Path（{param}），如果我没有错的话。@Libin哇，这是真的！idk为什么，因为我从教程中复制了这个类。谢谢

Mai 09, 2017 10:48:25 PM org.apache.tomcat.util.digester.SetPropertiesRule begin
WARNUNG: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:RestTest' did not find a matching property.
Mai 09, 2017 10:48:25 PM org.apache.catalina.startup.VersionLoggerListener log
INFORMATION: Server version:        Apache Tomcat/9.0.0.M20
Mai 09, 2017 10:48:25 PM org.apache.catalina.startup.VersionLoggerListener log
INFORMATION: Server built:          Apr 12 2017 19:27:10 UTC
Mai 09, 2017 10:48:25 PM org.apache.catalina.startup.VersionLoggerListener log
INFORMATION: Server number:         9.0.0.0
Mai 09, 2017 10:48:25 PM org.apache.catalina.startup.VersionLoggerListener log
INFORMATION: OS Name:               Windows 10
Mai 09, 2017 10:48:25 PM org.apache.catalina.startup.VersionLoggerListener log
INFORMATION: OS Version:            10.0
Mai 09, 2017 10:48:25 PM org.apache.catalina.startup.VersionLoggerListener log
INFORMATION: Architecture:          amd64
Mai 09, 2017 10:48:25 PM org.apache.catalina.startup.VersionLoggerListener log
INFORMATION: Java Home:             C:\Program Files\Java\jre1.8.0_121
Mai 09, 2017 10:48:25 PM org.apache.catalina.startup.VersionLoggerListener log
INFORMATION: JVM Version:           1.8.0_121-b13
Mai 09, 2017 10:48:25 PM org.apache.catalina.startup.VersionLoggerListener log
INFORMATION: JVM Vendor:            Oracle Corporation
Mai 09, 2017 10:48:25 PM org.apache.catalina.startup.VersionLoggerListener log
INFORMATION: CATALINA_BASE:         C:\Users\phamt\OneDrive\MyLittleProject\.metadata\.plugins\org.eclipse.wst.server.core\tmp0
Mai 09, 2017 10:48:25 PM org.apache.catalina.startup.VersionLoggerListener log
INFORMATION: CATALINA_HOME:         C:\Program Files\Apache Software Foundation\Tomcat 9.0
Mai 09, 2017 10:48:26 PM org.apache.catalina.startup.VersionLoggerListener log
INFORMATION: Command line argument: -Dcatalina.base=C:\Users\phamt\OneDrive\MyLittleProject\.metadata\.plugins\org.eclipse.wst.server.core\tmp0
Mai 09, 2017 10:48:26 PM org.apache.catalina.startup.VersionLoggerListener log
INFORMATION: Command line argument: -Dcatalina.home=C:\Program Files\Apache Software Foundation\Tomcat 9.0
Mai 09, 2017 10:48:26 PM org.apache.catalina.startup.VersionLoggerListener log
INFORMATION: Command line argument: -Dwtp.deploy=C:\Users\phamt\OneDrive\MyLittleProject\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps
Mai 09, 2017 10:48:26 PM org.apache.catalina.startup.VersionLoggerListener log
INFORMATION: Command line argument: -Djava.endorsed.dirs=C:\Program Files\Apache Software Foundation\Tomcat 9.0\endorsed
Mai 09, 2017 10:48:26 PM org.apache.catalina.startup.VersionLoggerListener log
INFORMATION: Command line argument: -Dfile.encoding=UTF-8
Mai 09, 2017 10:48:26 PM org.apache.catalina.core.AprLifecycleListener lifecycleEvent
INFORMATION: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: [C:\Program Files\Java\jre1.8.0_121\bin;C:\WINDOWS\Sun\Java\bin;C:\WINDOWS\system32;C:\WINDOWS;C:/Program Files/Java/jdk1.8.0_121/bin/../jre/bin/server;C:/Program Files/Java/jdk1.8.0_121/bin/../jre/bin;C:/Program Files/Java/jdk1.8.0_121/bin/../jre/lib/amd64;C:\Program Files\Java\jdk1.8.0_121\bin;C:\ProgramData\Oracle\Java\javapath;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\Program Files (x86)\Skype\Phone\;C:\Program Files\Git\cmd;C:\Program Files (x86)\sbt\bin;C:\Users\phamt\AppData\Local\Microsoft\WindowsApps;C:\Program Files (x86)\Java\jre1.8.0_121\bin;;C:\Users\phamt\eclipse\java-neon\eclipse;;.]
Mai 09, 2017 10:48:26 PM org.apache.coyote.AbstractProtocol init
INFORMATION: Initializing ProtocolHandler ["http-nio-8080"]
Mai 09, 2017 10:48:27 PM org.apache.tomcat.util.net.NioSelectorPool getSharedSelector
INFORMATION: Using a shared selector for servlet write/read
Mai 09, 2017 10:48:27 PM org.apache.coyote.AbstractProtocol init
INFORMATION: Initializing ProtocolHandler ["ajp-nio-8009"]
Mai 09, 2017 10:48:27 PM org.apache.tomcat.util.net.NioSelectorPool getSharedSelector
INFORMATION: Using a shared selector for servlet write/read
Mai 09, 2017 10:48:27 PM org.apache.catalina.startup.Catalina load
INFORMATION: Initialization processed in 2620 ms
Mai 09, 2017 10:48:27 PM org.apache.catalina.core.StandardService startInternal
INFORMATION: Starting service [Catalina]
Mai 09, 2017 10:48:27 PM org.apache.catalina.core.StandardEngine startInternal
INFORMATION: Starting Servlet Engine: Apache Tomcat/9.0.0.M20
Mai 09, 2017 10:48:30 PM org.apache.jasper.servlet.TldScanner scanJars
INFORMATION: At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
Mai 09, 2017 10:48:34 PM org.apache.coyote.AbstractProtocol start
INFORMATION: Starting ProtocolHandler ["http-nio-8080"]
Mai 09, 2017 10:48:34 PM org.apache.coyote.AbstractProtocol start
INFORMATION: Starting ProtocolHandler ["ajp-nio-8009"]
Mai 09, 2017 10:48:34 PM org.apache.catalina.startup.Catalina start
INFORMATION: Server startup in 7036 ms