Spring MVC 4 使用常規的fileupload上傳檔案(帶原始碼)
阿新 • • 發佈:2019-02-13
package com.websystique.springmvc.controller; import java.io.File; import java.io.IOException; import java.util.ArrayList; import java.util.List; import javax.validation.Valid; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.ui.ModelMap; import org.springframework.util.FileCopyUtils; import org.springframework.validation.BindingResult; import org.springframework.web.bind.WebDataBinder; import org.springframework.web.bind.annotation.InitBinder; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.multipart.MultipartFile; import com.websystique.springmvc.model.FileBucket; import com.websystique.springmvc.model.MultiFileBucket; import com.websystique.springmvc.util.FileValidator; import com.websystique.springmvc.util.MultiFileValidator; @Controller public class FileUploadController { private static String UPLOAD_LOCATION="C:/mytemp/"; @Autowired FileValidator fileValidator; @Autowired MultiFileValidator multiFileValidator; @InitBinder("fileBucket") protected void initBinderFileBucket(WebDataBinder binder) { binder.setValidator(fileValidator); } @InitBinder("multiFileBucket") protected void initBinderMultiFileBucket(WebDataBinder binder) { binder.setValidator(multiFileValidator); } @RequestMapping(value={"/","/welcome"}, method = RequestMethod.GET) public String getHomePage(ModelMap model) { return "welcome"; } @RequestMapping(value="/singleUpload", method = RequestMethod.GET) public String getSingleUploadPage(ModelMap model) { FileBucket fileModel = new FileBucket(); model.addAttribute("fileBucket", fileModel); return "singleFileUploader"; } @RequestMapping(value="/singleUpload", method = RequestMethod.POST) public String singleFileUpload(@Valid FileBucket fileBucket, BindingResult result, ModelMap model) throws IOException { if (result.hasErrors()) { System.out.println("validation errors"); return "singleFileUploader"; } else { System.out.println("Fetching file"); MultipartFile multipartFile = fileBucket.getFile(); //Now do something with file... FileCopyUtils.copy(fileBucket.getFile().getBytes(), new File(UPLOAD_LOCATION + fileBucket.getFile().getOriginalFilename())); String fileName = multipartFile.getOriginalFilename(); model.addAttribute("fileName", fileName); return "success"; } } @RequestMapping(value="/multiUpload", method = RequestMethod.GET) public String getMultiUploadPage(ModelMap model) { MultiFileBucket filesModel = new MultiFileBucket(); model.addAttribute("multiFileBucket", filesModel); return "multiFileUploader"; } @RequestMapping(value="/multiUpload", method = RequestMethod.POST) public String multiFileUpload(@Valid MultiFileBucket multiFileBucket, BindingResult result, ModelMap model) throws IOException { if (result.hasErrors()) { System.out.println("validation errors in multi upload"); return "multiFileUploader"; } else { System.out.println("Fetching files"); List<String> fileNames= new ArrayList<String>(); //Now do something with file... for(FileBucket bucket : multiFileBucket.getFiles()){ FileCopyUtils.copy(bucket.getFile().getBytes(), new File(UPLOAD_LOCATION + bucket.getFile().getOriginalFilename())); fileNames.add(bucket.getFile().getOriginalFilename()); } model.addAttribute("fileNames", fileNames); return "multiSuccess"; } } }
Spring
FileCopyUtils 工具類,可以將流從一個地方拷貝到目標資料夾。例子中目標目錄是C:/mytemp 所有檔案將傳到這裡。