错误404 Jersey Tomcat Eclipse Web服务

Question

这似乎很具说服力，但我发誓我已经遍历了关于堆栈溢出的所有答案，而且似乎没有任何工作对我有用。 我正在使用Eclipse Neon中的Jersey进行文件上传Web服务。

服务器：我的PC上有Tomcat 8.5（它在C语言中，我可以将WAR文件放在webapps中并运行它），而我的Eclipse上有GlassFish Server 4。

当我在任何服务器上运行我的应用程序时，它都显示未找到的错误404：

我的软件包资源管理器如下所示：

早些时候，我将org.glassfish servlet容器名称放在web.xml中，所以有时它最终会给出错误500的错误，这是Classnot Found，我知道这是因为当您使用jersey 2.x时glassfish参考有效

老实说，我不明白自己在做什么。 我现在要拔掉头发。 我已经尝试了一个星期。 请有人使我免于精神崩溃。 我可能是Java新手，但几天后就提交了，毕业即将到来。 救命！

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" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id = "WebApp_ID" version = "3.0"> <display-name>File Upload</display-name> <servlet> <servlet-name>Jersey RESTful Application</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>com.tutorialspoint</param-value> </init-param> </servlet> <servlet-mapping> <servlet-name>Jersey RESTful Application</servlet-name> <url-pattern>/rest/*</url-pattern> </servlet-mapping> </web-app> 

Java类实现

 package com.quratulaind.us3; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import javax.ws.rs.Consumes; import javax.ws.rs.POST; import javax.ws.rs.Path; import javax.ws.rs.core.MediaType; import com.sun.jersey.core.header.FormDataContentDisposition; //jersey-core-1.19.4 import com.sun.jersey.multipart.FormDataParam; //jersey multipart jar @Path("/cv") public class us3 { @POST @Path("/upload") @Consumes(MediaType.MULTIPART_FORM_DATA) public String uploadCV( @FormDataParam("file") InputStream uploadedInputStream, @FormDataParam("file") FormDataContentDisposition fileDetail) {//saving the file object to the local disk saveToDisk(uploadedInputStream, fileDetail); return "File Uploaded Successfully"; }//function uploadcv ends //Fuction to save uploaded file to disk private void saveToDisk(InputStream uploadedInputStream, FormDataContentDisposition fileDetail) {String uploadedFileLocation = "D:\\\\University Study Stuff\\\\FYP\\\\Uploaded CVs For Project"+fileDetail.getFileName(); try{ OutputStream out= new FileOutputStream(new File( uploadedFileLocation)); int read=0; byte[] bytes= new byte[1024]; out=new FileOutputStream( new File(uploadedFileLocation)); while((read=uploadedInputStream.read(bytes))!= -1){ out.write(bytes,0,read); } out.flush(); out.close(); }//try ends catch(IOException e) {e.printStackTrace();} }//Class ends } 

Answer 1

看起来您的项目中的jersey版本不匹配。 我建议按照以下步骤进行

删除所有手动添加的引用库。 我们将使用maven来管理依赖项。

在pom.xml下面使用（根据需要添加其他依赖项）

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">

  <modelVersion>4.0.0</modelVersion>

  <groupId>com.tutorialspoint</groupId>
  <artifactId>assignment</artifactId>
  <packaging>war</packaging>
  <version>1.0-SNAPSHOT</version>
  <name>assignment</name>

  <build>
    <finalName>assignment</finalName>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>2.5.1</version>
        <inherited>true</inherited>
        <configuration>
          <source>1.7</source>
          <target>1.7</target>
        </configuration>
      </plugin>
    </plugins>
  </build>

  <dependencyManagement>
    <dependencies>
      <dependency>
        <groupId>org.glassfish.jersey</groupId>
        <artifactId>jersey-bom</artifactId>
        <version>${jersey.version}</version>
        <type>pom</type>
        <scope>import</scope>
      </dependency>
    </dependencies>
  </dependencyManagement>

  <dependencies>
    <dependency>
      <groupId>org.glassfish.jersey.containers</groupId>
      <artifactId>jersey-container-servlet</artifactId>
    </dependency>
    <dependency>
      <groupId>org.glassfish.jersey.inject</groupId>
      <artifactId>jersey-hk2</artifactId>
    </dependency>
    <!-- uncomment this to get JSON support
    <dependency>
      <groupId>org.glassfish.jersey.media</groupId>
      <artifactId>jersey-media-json-binding</artifactId>
    </dependency>
    -->
    <dependency>
      <groupId>org.glassfish.jersey.media</groupId>
      <artifactId>jersey-media-multipart</artifactId>
    </dependency>
  </dependencies>
  <properties>
    <jersey.version>2.26-b09</jersey.version>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>
</project>

如下更新web.xml

<?xml version="1.0" encoding="UTF-8"?>
<!-- This web.xml file is not required when using Servlet 3.0 
container, see implementation details 
http://jersey.java.net/nonav/documentation/latest/jax-rs.html -->
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" 
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
     xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
     http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
  <servlet>
    <servlet-name>Jersey Web Application</servlet-name>
    <servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
    <init-param>
      <param-name>jersey.config.server.provider.packages</param-name>
      <param-value>com.quratulaind.us3<param-value>
    </init-param>
    <init-param>
      <param-name>jersey.config.server.provider.classnames</param-name>
      <param-value>org.glassfish.jersey.filter.LoggingFilter;org.glassfish.jersey.media.multipart.MultiPartFeature</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>Jersey Web Application</servlet-name>
    <url-pattern>/rest/*</url-pattern>
  </servlet-mapping>
</web-app>

删除资源文件并添加以下文件

package com.quratulaind.us3;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

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

import org.glassfish.jersey.media.multipart.FormDataContentDisposition;
import org.glassfish.jersey.media.multipart.FormDataParam;

/**
 * Root resource (exposed at "myresource" path)
 */
@Path("cv")
public class MyResource {

    /**
     * Method handling HTTP GET requests. The returned object will be sent
     * to the client as "text/plain" media type.
     *
     * @return String that will be returned as a text/plain response.
     */
     @GET
     @Produces(MediaType.TEXT_PLAIN)
     public String getIt() {
         return "Got it!";
     }

     @POST
     @Path("/upload")
     @Consumes(MediaType.MULTIPART_FORM_DATA)
     public String uploadCV(
         @FormDataParam("file") InputStream uploadedInputStream,
         @FormDataParam("file") FormDataContentDisposition fileDetail) 
     {
         //saving the file object to the local disk
         saveToDisk(uploadedInputStream, fileDetail);
         return "File Uploaded Successfully";
     }//function uploadcv ends

     //Fuction to save uploaded file to disk
     private void saveToDisk(InputStream uploadedInputStream, 
         FormDataContentDisposition fileDetail) {
         String uploadedFileLocation = "D:\\University Study Stuff\\FYP\\Uploaded CVs For Project"+fileDetail.getFileName();
         try{
             OutputStream out= new FileOutputStream(new File( uploadedFileLocation));
             int read=0;
             byte[] bytes= new byte[1024];
             out=new FileOutputStream( new File(uploadedFileLocation));
             while((read=uploadedInputStream.read(bytes))!= -1){
                 out.write(bytes,0,read);
             }
             out.flush();
             out.close();

          }//try ends
          catch(IOException e)
          {e.printStackTrace();}
      }
  }

一旦完成这些更改，就可以使用mvn package创建war mvn package并将其部署/复制到${TOMCAT_HOME\\webapps 。

检查样本资源是否正常工作

http://localhost:8080/{CONTEXT_PATH}/rest/cv

如果以上方法都可以，请尝试使用您的上传资源方法。

附言：我尚未测试您的上传代码，这是您的作业，您应该完成它。