(30) Product Management-Add item (upload image)

Add Item (upload image)1Add a connection on the Modify page/store/adminproduct?method=Addui2. In Addui request forward to add page3. Modify the action on the form page:/store/Addproductservlet Submission Method: Method= "POST"Add enctype property: Enctype= "Multipart/form-data"Add the Name property to each field4. Addproductservlet information obtained through request.getparametermap all empty we want to use Beanuitls.populate (BEAN,MAP), we need to create a Map collection, the front desk to accept the information manually put into the map note: Pictures of the product:1: Save the disk to the server2To add a picture to the data, call Productservice to complete the Add product operation Redirect to all items above////////////////////////////////    ////////////////////////////////    ////////////////////////////////FileUpload using the Create a disk file entry factory Diskfileitemfactory factory=Newdiskfileitemfactory (); Create a core File upload object Servletfileupload servletfileupload upload=Newservletfileupload (Factory); Upload object Call method resolution request get a list<FileItem>List<FileItem> list =upload.parserequest (Request); Traverse list to get each file entry isformfiled (): Determine if it is a normal upload componenttrue: Normal upload componentfalse: File Upload Component Getfiledname (): Gets the Name property value of the form label if the normal upload component getString ("Utf-8"): Gets the value entered by the user if the file Upload Component GetName (): Gets the name of the uploaded file getInputStream (): Gets the upload file stream Finally delete temporary files delete ()

Importing the FileUpload jar package

Http://pan.baidu.com/s/1jIb11gq

/store/webcontent/admin/product/list.jsp

/store/src/com/louis/web/servlet/adminproductservlet.java

/*** Skip to the page where you added the item *@paramRequest *@paramResponse *@return     * @throwsException*/     PublicString Addui (httpservletrequest request, httpservletresponse response)throwsException {//query all categories to return to listCategoryservice cs= (Categoryservice) Beanfactory.getbean ("Categoryservice"); List<Category> CList =Cs.findall (); //put list in RequestRequest.setattribute ("CList", CList); return"/admin/product/add.jsp"; }

/store/webcontent/admin/product/add.jsp

/store/src/com/louis/web/servlet/addproductservlet.java

 PackageCom.louis.web.servlet;ImportJava.io.File;ImportJava.io.FileOutputStream;Importjava.io.IOException;ImportJava.io.InputStream;Importjava.util.Date;ImportJava.util.HashMap;Importjava.util.List;Importjavax.servlet.ServletException;ImportJavax.servlet.http.HttpServlet;Importjavax.servlet.http.HttpServletRequest;ImportJavax.servlet.http.HttpServletResponse;Importorg.apache.commons.beanutils.BeanUtils;ImportOrg.apache.commons.fileupload.FileItem;Importorg.apache.commons.fileupload.disk.DiskFileItemFactory;ImportOrg.apache.commons.fileupload.servlet.ServletFileUpload;Importorg.apache.commons.io.IOUtils;Importcom.louis.domain.Category;Importcom.louis.domain.Product;ImportCom.louis.service.ProductService;Importcom.louis.utils.BeanFactory;Importcom.louis.utils.UUIDUtils;Importcom.louis.utils.UploadUtils;/*** Servlet Implementation class Addproduct*/ Public classAddproductservletextendsHttpServlet {protected voidDoget (HttpServletRequest request, httpservletresponse response)throwsservletexception, IOException {Try {            //0. Create a map to put data into the foregroundhashmap<string, object> map =NewHashmap<>(); //Create a disk file entryDiskfileitemfactory factory =Newdiskfileitemfactory (); //creating a core upload objectServletfileupload upload =Newservletfileupload (Factory); //Parse Requestlist<fileitem> list =upload.parserequest (Request); //iterating through the collection             for(Fileitem fi:list) {//determine if it is an ordinary upload component                if(Fi.isformfield ()) {//Normal upload ComponentsMap.put (Fi.getfieldname (), fi.getstring ("Utf-8")); }Else{                    //File Upload Component//Get file nameString name =Fi.getname (); //gets the real name of the file xxxx.xxString realname =uploadutils.getrealname (name); //get the random name of a fileString Uuidname =Uploadutils.getuuidname (realname); //get the file's storage pathString Path = This. Getservletcontext (). Getrealpath ("/PRODUCTS/1"); //Get file StreamInputStream is =Fi.getinputstream (); //Save PictureFileOutputStream OS =NewFileOutputStream (NewFile (path, uuidname));                    Ioutils.copy (is, OS);                    Os.close ();                                        Is.close (); //Delete temporary filesFi.delete (); //set the path of a file in mapMap.put (Fi.getfieldname (), "products/1/" +uuidname); }                            }                                                //1. Package ParametersProduct p =NewProduct ();                        Beanutils.populate (P, map); //1.1 Product IDP.setpid (Uuidutils.getid ()); //1.2 Item TimeP.setpdate (NewDate ()); //1.3 Package CateogryCategory C =NewCategory (); C.setcid (String) map.get ("CID"));                        P.setcategory (c); //2. Call service to complete the addProductservice ps= (Productservice) Beanfactory.getbean ("Productservice");                        Ps.add (P); //3. Page RedirectionResponse.sendredirect (Request.getcontextpath () + "/adminproduct?method=findall"); } Catch(Exception e) {e.printstacktrace (); Request.setattribute ("MSG", "Product Add failed ~"); Request.getrequestdispatcher ("/jsp/msg.jsp"). Forward (request, response); return; }                    }    protected voidDoPost (HttpServletRequest request, httpservletresponse response)throwsservletexception, IOException {//TODO auto-generated Method Stubdoget (request, response); }}

/store/webcontent/web-inf/web.xml

  <servlet>    <description></description>    <display-name>addproductservlet</ display-name>    <servlet-name>AddProductServlet</servlet-name>    <servlet-class >com.louis.web.servlet.addproductservlet</servlet-class>  </servlet>  < servlet-mapping>    <servlet-name>AddProductServlet</servlet-name>    <url-pattern>/ Addproduct</url-pattern>  </servlet-mapping>

Problem:

Beanutils

UploadFile

Map

(30) Product Management-Add item (upload image)