基于springMVC的文件上传-图片

文件上传有多种工具类可以选择，比如：conmons-FileUpload.jar , springMVC自带的文件上传工具类。在多种工具类里本人觉得transferTo()方法最简便好用。下面是基于它实现的图片上传功能的代码。当然它不仅只限于图片格式。

package com.jjs.app.web.controller;import java.io.File;import java.io.IOException;import java.text.SimpleDateFormat;import java.util.Date;import java.util.Random;import org.springframework.beans.factory.annotation.Value;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestParam;import org.springframework.web.bind.annotation.ResponseBody;import org.springframework.web.bind.annotation.RestController;import org.springframework.web.multipart.MultipartFile;import org.springframework.web.multipart.commons.CommonsMultipartFile;import com.mljr.carfinance.crm.app.util.FileUtils;import com.mljr.carfinance.crm.app.util.Logs;import com.mljr.carfinance.crm.app.util.RespMsg;/** * 图片上传下载类 * @author jjs * */@RestController@RequestMapping("/img")public class UploadImgController extends BaseController{@Value("${img.upload.dir}")private static String imgUploadDir;// 图片上传路径/** * 图片上传 * @param imgFile * @return RespMsg * @throws IllegalStateException * @throws IOException */@RequestMapping("/upload")@ResponseBodypublic RespMsg upLoad(@RequestParam("imgFile") MultipartFile imgFile) throws IllegalStateException, IOException{if(imgFile != null){String imgName = imgFile.getOriginalFilename();String ext = imgName.substring(imgName.lastIndexOf(".") +1);if(ext.equals("jpg") || ext.equals("png") || ext.equals("jpeg")){SimpleDateFormat sf  = new SimpleDateFormat("yyyyMMdd");String dir = sf.format(new Date()); File dayDir = new File(imgUploadDir + File.separator + dir);sf.applyPattern("yyyyMMddHHmmssSSS");String newImgName = sf.format(new Date()) + "_" + new Random().nextInt(1000) + "." + ext;String  savePath = dayDir + File.separator + newImgName;imgFile.transferTo(FileUtils.createFile(new File(savePath)));Logs.C.info("图片'"+ imgName +"'上传成功", savePath);return success("上传成功");}}return fail("上传失败");}/** * 多图片同时上传 * @param imgFile * @return RespMsg * @throws IllegalStateException * @throws IOException */@RequestMapping("/multiUpload")@ResponseBodypublic RespMsg upLoad(@RequestParam("imgFile") CommonsMultipartFile[] imgFiles) throws IllegalStateException, IOException{if(imgFiles.length != 0){for(int i = 0; i < imgFiles.length; i++){if(imgFiles[i] != null && imgFiles[i].getSize()!=0){String imgName = imgFiles[i].getOriginalFilename();String ext = imgName.substring(imgName.lastIndexOf(".") +1);if(ext.equals("jpg") || ext.equals("png") || ext.equals("jpeg")){SimpleDateFormat sf  = new SimpleDateFormat("yyyyMMdd");String dir = sf.format(new Date()); File dayDir = new File(imgUploadDir + File.separator + dir);sf.applyPattern("yyyyMMddHHmmssSSS");String newImgName = sf.format(new Date()) + "_" + new Random().nextInt(1000) + "." + ext;String  savePath = dayDir + File.separator + newImgName;imgFiles[i].transferTo(FileUtils.createFile(new File(savePath)));Logs.C.info("图片'"+ imgName +"'上传成功", savePath);}}}return success("上传成功");}return fail("上传失败");}}

工具类：

package com.jjs.app.util;import java.io.File;import java.io.IOException;/** * 文件工具类 * @author jjs * */public class FileUtils {public static File createFile(File file) throws IOException {if (!file.exists()) {makeDir(file.getParentFile());}file.createNewFile();return file;}public static void makeDir(File dir) {if (!dir.getParentFile().exists()) {makeDir(dir.getParentFile());}dir.mkdir();}}