Using jersey to build picture server has echo picture function

1. Foreground Interface Code

<form id= "Jvform" action= "add.do" method= "post" enctype= "Multipart/form-data" ><table><tr><td Width= "20%" class= "Pn-flabel pn-flabel-h" ></td><td width= "80%" class= "pn-fcontent" ><input type=" hidden "name=" Imgurl "id=" path "/><input type=" file " Onchange= "Uploadpic ()" Name= "pic" id= "Logopic"/></td></tr></table></form>

2. Front-desk JS code

<script type= "Text/javascript" >//upload picture function uploadpic ()  {//define parameters var options =  {url :  "/upload/uploadpic.do",datatype :  "JSON",type :  "POST", Beforesubmit  : function (formdata,jqform,options) {//  determine if the picture//  convert Jqform to DOM object var f =  jqform[0];//  gets the value of name Logopic in the DOM object var v = f.logopic.value;//  gets the extension and turns it into lowercase var ext  = v.substring (v.length-3). toLowerCase ();//  extension  jpg gif bmp png if ( ext !=  "JPG"  && ext !=  "gif"  && ext !=  "BMP"  && ext !=  "PNG") {alert ("Only allow images to be uploaded!"); Return false;} Verify submitted Form return true;},success : function (data)  {//  echo Picture contents $ ("#allImgUrl"). attr ("src",  data.url); $ ("#path"). Val (Data.path);}};/ / jquery.form Use $ ("#jvForm"). Ajaxsubmit (options);} </script>

3. Configure the picture converter in spring

<!--upload picture converter--><bean id= "Multipartresolver" class= " Org.springframework.web.multipart.commons.CommonsMultipartResolver > <!--Setting the maximum size of the uploaded file is 1MB--< Property Name= "Maxuploadsize" value= "1048576"/></bean>

4. Creating Uploadcontroller and Tool classes

package cn.itcast.core.controller.admin;import java.io.ioexception;import java.text.dateformat; import java.text.simpledateformat;import java.util.date;import java.util.random;import  javax.servlet.http.httpservletresponse;import org.apache.commons.io.filenameutils;import  org.json.jsonobject;import org.springframework.stereotype.controller;import  org.springframework.web.bind.annotation.requestmapping;import  org.springframework.web.bind.annotation.requestparam;import  org.springframework.web.multipart.multipartfile;import com.sun.jersey.api.client.client;import  com.sun.jersey.api.client.webresource;import cn.itcast.common.web.responseutils;import  Cn.itcast.core.web.Constants, @Controllerpublic  class UploadController {//  Upload Image @requestmapping (value =  "/upload/uploadpic.do") Public void uploadpic (@RequestParam ( Required = false)  multipartfile pic, httpservletresponse response)  {//  extension string ext = filenameutils.getextension ( Pic.getoriginalfilename ());//  picture name generation policy Dateformat df = new simpledateformat (" Yyyymmddhhmmsssss ");//  Picture name Part String format = df.format (new date ());//  Random three-digit random r = new random ();// n 1000 0-999 99for  (int i  = 0; i < 3; i++)  {format += r.nextint (10);}   Instantiate a jerseyclient client = new client ();//  Save the database string path =  "upload/"  + format +  "."  + ext;//  What is the request path for the other server? string url = constants.image_url + path;//  set the request path webresource resource  = client.resource (URL);//  send start  post get puttry {resource.put (String.class,  Pic.getbytes ()); } catch  (ioexception e)  {e.printstacktrAce ();}   returns two paths Jsonobject jsonobject = new jsonobject (); Jsonobject.put ("url",  url); Jsonobject.put ("path",  path); Responseutils.renderjson (Response, jsonobject.tostring ());}}

package cn.itcast.core.web;public interface constants  {/** *  Image Server  */public static final String IMAGE_URL =  http ://localhost:8088/babasportproject_imageservice/";} 

package cn.itcast.common.web;import java.io.ioexception;import  javax.servlet.http.httpservletresponse;public class responseutils {//  Send content public  Static void render (httpservletresponse response, string contenttype, string  text)  {response.setcontenttype (ContentType); Try {response.getwriter (). write (text);}  catch  (ioexception e)  {e.printstacktrace ();}}   is sending Jsonpublic static void renderjson (httpservletresponse response, string  text)  {render (response,  "Application/json;charset=utf-8",  text);}   Send Xmlpublic static void renderxml (httpservletresponse response, string  Text)  {render (response,  "Text/xml;charset=utf-8",  text);}   Send Textpublic static void rendertext (httpservletresponse response, string  text)  {render (response,  "Text/plain;charset=utf-8", text);}} 

5. Build another tomcat as a picture server

Picture server tomcat settings Tomcat/conf/web.xml content changes

<servlet><servlet-name>default</servlet-name><servlet-class> org.apache.catalina.servlets.defaultservlet</servlet-class><init-param><param-name>debug< /param-name><param-value>0</param-value></init-param><init-param><param-name> Readonly</param-name><param-value>false</param-value></init-param><init-param> <param-name>listings</param-name><param-value>false</param-value></init-param> <load-on-startup>1</load-on-startup></servlet>

Create Javaweb project on 6.Eclipse, name Babasprotproject_imageservice

7. Modify the Tomcat port number of the image server

8. Create the Upload folder under the WebApp directory of the Babasprotproject_imageservice Project

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Whether the server test was started successfully

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This article is from the Java Development Engineer blog, so be sure to keep this source http://robertohuang.blog.51cto.com/10343725/1846554

Using jersey to build picture server has echo picture function