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>