jersey+jetty实现文件上传

服务配置与启动类

import org.glassfish.jersey.servlet.ServletContainer;
import javax.ws.rs.Path;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.servlet.FilterHolder;
import org.eclipse.jetty.servlet.ServletContextHandler;
import org.eclipse.jetty.servlet.ServletHolder;
import org.eclipse.jetty.servlets.CrossOriginFilter;
/**
 * 功能:服务启动
 * @author yuchong.shen
 * 2019年1月10日
 *
 */
@Path("/")
public class RestInterface {
    private void start(int port) throws Exception {

        //设置扫描包及配置multipart
        ServletHolder servletHolder = new ServletHolder(ServletContainer.class);
        servletHolder.setInitParameter("jersey.config.server.provider.packages","yuchongshen.uploader");
        servletHolder.setInitParameter("jersey.config.server.provider.classnames","org.glassfish.jersey.media.multipart.MultiPartFeature");
        //servlet上下文
         ServletContextHandler servletContextHandler = new ServletContextHandler(ServletContextHandler.SESSIONS);
         servletContextHandler.addServlet(servletHolder, "/*");
        //解决前端跨域访问问题
        FilterHolder filterHolder = new FilterHolder(CrossOriginFilter.class);
        filterHolder.setInitParameter("allowedOrigins", "*");
        filterHolder.setInitParameter("allowedMethods", "GET, POST");
        servletContextHandler.addFilter(filterHolder, "/*", null);
        //创建服务
        Server server = new Server(Config.PORT);
        server.setHandler(servletContextHandler);
        server.start();

        System.out.println("******************************************************************");
        System.out.println("server has startup,port:"+Config.PORT);
        System.out.println("server has startup,upload path:"+Config.UPLOAD_PATH);
        System.out.println("******************************************************************");

    }
    public static void main(String[] args) throws Exception {
        int portIndex=0,uploadPathIndex=0;
        for(int i=0;i<args.length;i++){
            if(args[i].equals("-uploadpath")) uploadPathIndex=i+1;//获取上传路径根目录
            if(args[i].equals("-port"))       portIndex=i+1;//获取端口号
        }
        if(uploadPathIndex>0) Config.UPLOAD_PATH = args[uploadPathIndex];
        if(portIndex>0)       Config.PORT        = Integer.parseInt(args[portIndex]);

        RestInterface server = new RestInterface();
        server.start(Config.PORT);
    }

编写上传服务类

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import javax.inject.Singleton;
import javax.ws.rs.Consumes;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.MediaType;

import org.glassfish.jersey.media.multipart.FormDataContentDisposition;
import org.glassfish.jersey.media.multipart.FormDataParam;
/**
 * 功能:处理上传
 * @author yuchong.shen
 * 2019年1月10日
 *
 */
@Path("/upload")
@Singleton
public class Uploader {
    @POST
    @Consumes({MediaType.MULTIPART_FORM_DATA})
    public String  uploadFile(@FormDataParam("file") InputStream fileInputStream,
                              @FormDataParam("file") FormDataContentDisposition fileMetaData,
                              @FormDataParam("path") String path,
                              @FormDataParam("file_name") String fileName) throws Exception
    {
        String postfix = fileMetaData.getFileName().substring(fileMetaData.getFileName().lastIndexOf("."));
        if(fileName==null){
            fileName = new String(fileMetaData.getFileName().getBytes("iso8859-1"),"utf-8");
        }else{
            fileName = fileName+postfix;
        }
        if(path==null)    path = "";

        try
        {
            int read = 0;
            byte[] bytes = new byte[1024];

            OutputStream out = new FileOutputStream(new File(Config.UPLOAD_PATH+File.separatorChar +path+ File.separatorChar+fileName));
            while ((read = fileInputStream.read(bytes)) != -1)
            {
                out.write(bytes, 0, read);
            }
            out.flush();
            out.close();
        } catch (IOException e)
        {
            throw new WebApplicationException();
        }
        return "uploaded successfully";
    }
}

相关依赖

<properties>
        <jersey2.version>2.19</jersey2.version>
        <jaxrs.version>2.0.1</jaxrs.version>
    </properties>
      <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
        </dependency>
         <dependency>
            <groupId>org.eclipse.jetty</groupId>
            <artifactId>jetty-server</artifactId>
            <version>9.4.14.v20181114</version>
        </dependency>
        <dependency>
            <groupId>org.eclipse.jetty</groupId>
            <artifactId>jetty-servlets</artifactId>
            <version>9.4.14.v20181114</version>
        </dependency>
        <dependency>
            <groupId>org.eclipse.jetty</groupId>
            <artifactId>jetty-servlet</artifactId>
            <version>9.4.14.v20181114</version>
        </dependency>
         <!-- JAX-RS -->
        <dependency>
            <groupId>javax.ws.rs</groupId>
            <artifactId>javax.ws.rs-api</artifactId>
            <version>${jaxrs.version}</version>
        </dependency>
        <!-- Jersey 2.19 -->
        <dependency>
            <groupId>org.glassfish.jersey.containers</groupId>
            <artifactId>jersey-container-servlet</artifactId>
            <version>${jersey2.version}</version>
        </dependency>
        <dependency>
            <groupId>org.glassfish.jersey.core</groupId>
            <artifactId>jersey-server</artifactId>
            <version>${jersey2.version}</version>
        </dependency>
        <dependency>
            <groupId>org.glassfish.jersey.core</groupId>
            <artifactId>jersey-client</artifactId>
            <version>${jersey2.version}</version>
        </dependency>
         <dependency>
            <groupId>org.glassfish.jersey.media</groupId>
            <artifactId>jersey-media-multipart</artifactId>
            <version>2.19</version>
        </dependency>
    </dependencies>

启动

maven打包执行

mvn package

进入target目录执行:

java -jar uploader-0.0.-SNAPSHOT.jar

服务启动完毕，默认端口为8888，上传根目录为jar包所在目录

配置端口或上传根目录

启动时带参数,例如:

java -jar target/uploader-0.0.1-SNAPSHOT.jar -port 8777 -uploadpath C:\Users\yuchongshen\

访问

http://ip:端口/upload

restful api

前端使用post方法mulitpart/form_data

参数名	类型	描述
file	File	上传的文件
path	String	上传在根目录下的哪个目录,必须事先创建
file_name	String	上传文件改名

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