使用OkHTTP来调用restful接口上传文件

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首先想要了解okhttp相关功能，请查看文章：http://blog.csdn.net/win7system/article/details/51697884，

闲话就不多说了，直接来干货

okhttp接口

import java.io.File;import java.io.IOException;import com.squareup.okhttp.MediaType;import com.squareup.okhttp.MultipartBuilder;import com.squareup.okhttp.OkHttpClient;import com.squareup.okhttp.Request;import com.squareup.okhttp.RequestBody;import com.squareup.okhttp.Response;public class PostMultipart {    /**     * The imgur client ID for OkHttp recipes. If you're using imgur for anything     * other than running these examples, please request your own client ID!     * https://api.imgur.com/oauth2     */    private static final String IMGUR_CLIENT_ID = "9199fdef135c122";    private static final MediaType MEDIA_TYPE_DATA = MediaType.parse("multipart/form-data");     private final OkHttpClient client = new OkHttpClient();     public void run(String url, String filePath) throws Exception {        // Use the imgur image upload API as documented at https://api.imgur.com/endpoints/image         File file = new File(filePath);         RequestBody requestBody = new MultipartBuilder()                .type(MultipartBuilder.FORM)                .addFormDataPart("filename", file.getName())                .addFormDataPart("file", file.getName(),                        RequestBody.create(MEDIA_TYPE_DATA, file))                .build();         Request request = new Request.Builder()                .header("Authorization", "Client-ID " + IMGUR_CLIENT_ID)                .url(url)                .post(requestBody)                .build();         Response response = client.newCall(request).execute();        if (!response.isSuccessful()) throw new IOException("Unexpected code " + response);         System.out.println(response.body().string());    } }</span>

restful接口

@POST@Path("/upload")@Consumes(MediaType.MULTIPART_FORM_DATA)@Produces(MediaType.APPLICATION_JSON)public Response uploadFile(@FormDataParam("file") InputStream uploadedInputStream,@FormDataParam("file") FormDataContentDisposition fileDetail, @FormDataParam("filename") String filename)throws IOException {System.out.println("文件创建时间：" + fileDetail.getFileName());System.out.println("文件名字：" + filename);File file = new File("D:\\demo\\"+fileDetail.getFileName());if (!file.exists())file.createNewFile();FileOutputStream out = new FileOutputStream(file);int c;byte buffer[] = new byte[1024];while ((c = uploadedInputStream.read(buffer)) != -1) {for (int i = 0; i < c; i++)out.write(buffer[i]);}Map<String, Object> map = new HashMap<String, Object>();map.put("文件读取日期", fileDetail.getReadDate());map.put("文件大小", fileDetail.getSize());map.put("文件类型", fileDetail.getType());map.put("文件读取", uploadedInputStream.read());uploadedInputStream.close();out.close();return Response.status(200).entity(map).build();}

另外需要在web.xml下添加一个初始化参数才能起作用

<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>

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