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图片上传需要用到的一些依赖：
<dependency>
<groupId>org.jvnet.mimepull</groupId>
<artifactId>mimepull</artifactId>
<version>1.7</version>
</dependency>
<dependency>
<groupId>com.sun.jersey.contribs</groupId>
<artifactId>jersey-multipart</artifactId>
<version>${jersey.version}</version>
</dependency>
@Path("/img")
表示访问路径为/img，并且可以接收参数，例如@Path("/images/{name}.{type}")，再利用@PathParam来接收name和type两个参数；同时也支持正则表达式，例如@Path("username/{username:[a-zA-Z][0-9]*}")
@POST
代表接受的HTTP请求类型为POST
@Consumes(MediaType.MULTIPART_FORM_DATA)
表示接受的数据类型为"multipart/form-data"
@Produces(MediaType.APPLICATION_JSON)
表示发生出去的数据类型为"application/json"
@FormDataParam
接收图片、文件等特定类型数据
@Context
接收POST请求中发送的参数
@QueryParam
获取GET请求中url中的参数，例如请求url为http://localhost:8080/user?username=Amy&age=12&gender=male，那么可以使用：
@Path("/user")
@GET
public addUser(@QueryParam("username") String username,
@QueryParam("age") int age,
@QueryParam("gender") String gender) {
//.....
}
来接收这三个参数。
@PathParam
获取URL路径参数
1 public static final String ImgPath = "D:/Imgaes/"; 2 @Path("/uploadimg") 3 @POST 4 @Produces(MediaType.APPLICATION_JSON) 5 @Consumes(MediaType.MULTIPART_FORM_DATA) 6 public String uploadImg(@FormDataParam("file") InputStream fileInputStream, 7 @FormDataParam("file") FormDataContentDisposition dataContentDisposition, 8 @Context HttpServletRequest request) { 9 String imgName = Calendar.getInstance().getTimeInMillis() + dataContentDisposition.getFileName(); 10 File file = new File(ImgPath + imgName); 11 try { 12 FileUtils.copyInputStreamToFile(fileInputStream, file); 13 } catch (IOException e) { 14 15 e.printStackTrace(); 16 } 17 JsonBuilder resultJson = new JsonBuilder(); 18 resultJson.append("ret", request.getScheme() + "://" + request.getServerName() + ":" 19 + request.getServerPort() + "/app/images/" + imgName); 20 return resultJson.toString(); 21 } 22 23 @Path("/images/{name}.{type}") 24 @GET 25 public void showImg(@PathParam("name") String imageName, 26 @PathParam("type") String type, 27 @Context HttpServletResponse response) 28 throws IOException { 29 InputStream inputStream = null; 30 OutputStream out = null; 31 try { 32 File file = new File(ImgPath + imageName + "." + type); 33 inputStream = new FileInputStream(file); 34 out = response.getOutputStream(); 35 // pic size = 1M 36 byte[] bytes = new byte[1024 * 1024]; 37 int len = 0; 38 while ((len = inputStream.read(bytes)) > 0) { 39 out.write(bytes, 0, len); 40 } 41 } catch (Exception e) { 42 e.printStackTrace(); 43 } finally { 44 if (inputStream != null) 45 inputStream.close(); 46 if (out != null) 47 out.close(); 48 } 49 }
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原文地址：http://www.cnblogs.com/puyangsky/p/5390263.html
