"Jersey" image upload and display

first, pre-preparation

Some of the dependencies you need to upload images:

<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>

Second, Jersey annotation

@Path ("/img")

Indicates that the access path is/IMG and can receive parameters such as @path ("/images/{name}.{ Type} "), and then use @pathparam to receive the name and type two parameters, and also support regular expressions such as @path (" username/{username:[a-za-z][0-9]*} ")

@POST

Represents an accepted HTTP request type of post

@Consumes (Mediatype.multipart_form_data)

Indicates that the accepted data type is "Multipart/form-data"

@Produces (Mediatype.application_json)

Indicates that the data type that occurred is "Application/json"

@FormDataParam

Receive specific types of data such as pictures, files, etc.

@Context

Receive the parameters sent in the POST request

@QueryParam

To get the parameters in the URL in the GET request, such as the request URL is Http://localhost:8080/user?username=Amy&age=12&gender=male, you can use:

@Path ("/user") @GET the public AddUser (@QueryParam ("username") String username,               @QueryParam (  int age ,               @QueryParam ("Gender") String gender) {    //  .....}                        

To receive these three parameters.

@PathParam

Get URL Path parameter

Third, the Code

1  Public Static FinalString Imgpath = "d:/imgaes/";2@Path ("/uploadimg")3 @POST4 @Produces (Mediatype.application_json)5 @Consumes (mediatype.multipart_form_data)6      PublicString uploadimg (@FormDataParam ("File") InputStream FileInputStream,7@FormDataParam ("File") formdatacontentdisposition datacontentdisposition,8 @Context httpservletrequest request) {9String imgname = Calendar.getinstance (). Gettimeinmillis () +datacontentdisposition.getfilename ();TenFile File =NewFile (Imgpath +imgname); One         Try { A fileutils.copyinputstreamtofile (fileinputstream, file); -}Catch(IOException e) { -  the e.printstacktrace (); -         } -Jsonbuilder Resultjson =NewJsonbuilder (); -Resultjson.append ("ret", Request.getscheme () + "://" + request.getservername () + ":" ++ request.getserverport () + "/app/images/" +imgname); -         returnresultjson.tostring (); +     } A  at@Path ("/images/{name}.{ Type} ") - @GET -      Public voidShowimg (@PathParam ("name") String ImageName, -@PathParam ("type") String type, - @Context httpservletresponse Response) -             throwsIOException { inInputStream InputStream =NULL; -OutputStream out =NULL; to         Try { +File File =NewFile (Imgpath + imageName + "." +type); -InputStream =Newfileinputstream (file); theout =Response.getoutputstream (); *             //pic size = 1M $             byte[] bytes =New byte[1024 * 1024];Panax Notoginseng             intLen = 0; -              while(len = inputstream.read (bytes)) > 0) { theOut.write (Bytes, 0, Len); +             } A}Catch(Exception e) { the e.printstacktrace (); +}finally { -             if(InputStream! =NULL) $ inputstream.close (); $             if(Out! =NULL) - out.close (); -         } the}

"Jersey" image upload and display