resteasy上传文件写法

resteasy服务器代码

 @Path(value = "file")
 public class UploadFileService {
     private final String UPLOADED_FILE_PATH = "d:\\resteasy\\";
     @POST
     @Path(value = "/upload")
     @Consumes("multipart/form-data")
     public Response uploadFile(MultipartFormDataInput input) {
         String fileName = "";
         Map<String, List<InputPart>> uploadForm = input.getFormDataMap();
         List<InputPart> inputParts = uploadForm.get("file_upload");
         for (InputPart inputPart : inputParts) {
          try {
             MultivaluedMap<String, String> header = inputPart.getHeaders();
             fileName = getFileName(header);
             //convert the uploaded file to inputstream
             InputStream inputStream = inputPart.getBody(InputStream.class,null);
             byte [] bytes = IOUtils.toByteArray(inputStream);
             //constructs upload file path
             fileName = UPLOADED_FILE_PATH + fileName;
             writeFile(bytes,fileName);
           } catch (IOException e) {
             e.printStackTrace();
           }
         }
         return Response.status(200)
             .entity("uploadFile is called, Uploaded file name : " + fileName).build();
     }

     private String getFileName(MultivaluedMap<String, String> header) {
         String[] contentDisposition = header.getFirst("Content-Disposition").split(";");
         for (String filename : contentDisposition) {
             if ((filename.trim().startsWith("filename"))) {
                 String[] name = filename.split("=");
                 String finalFileName = name[1].trim().replaceAll("\"", "");
                 return finalFileName;
             }
         }
         return "unknown";
     }

     //save to somewhere
     private void writeFile(byte[] content, String filename) throws IOException {
         File file = new File(filename);
         if (!file.exists()) {
             file.createNewFile();
         }
         FileOutputStream fop = new FileOutputStream(file);
         fop.write(content);
         fop.flush();
         fop.close();
     }
 }

客户端代码

 <form action="http://localhost:8080/resteay-server/file/upload/"
         method="post" enctype="multipart/form-data">
         <input type="file" name="file_upload"> <input type="submit"
             value="提交">
 </form>