springmvc处理上传图片代码(校验图片尺寸、图片大小)

package com.maizuo.web.controller;import com.maizuo.domain.Result;import com.maizuo.util.ConstantsConfig;import com.maizuo.util.Upload;import hyxlog.Log;import net.sf.json.JSONObject;import org.apache.commons.lang.StringUtils;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.*;import org.springframework.web.multipart.MultipartFile;import javax.imageio.ImageIO;import javax.servlet.http.HttpServletRequest;import java.awt.image.BufferedImage;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.IOException;import java.util.Date;import java.util.List;/** * Created by qiyang on 2015/6/15 and improved by heisenberg on 2016/04/18 */@Controller@RequestMapping("/api/upload")public class UploadController {@RequestMapping(value = "/img", method = RequestMethod.POST)@ResponseBodypublic Result uploadImg(@RequestParam(value = "file", required = false) MultipartFile file, String pathName,Integer sizeRule, Integer isDeviation, HttpServletRequest request)throws FileNotFoundException, IOException {String loghead = "通用接口-上传图片:";JSONObject json = new JSONObject();if (file == null) {Log.info(loghead + "上传失败:文件为空");return new Result(900001, "", "上传失败:文件为空");}if (StringUtils.isBlank(pathName)) {pathName = ConstantsConfig.getString("DEFALTUPLOADPATH");}List<Object> uploadPathNames = ConstantsConfig.getList("UPLOADPATHNAMES");boolean flag = false;for (int i = 0; i < uploadPathNames.size(); i++) {if (pathName.equals(uploadPathNames.get(i))) {flag = true;}}if (!flag) {Log.info(loghead + "上传失败:上传路径无效");return new Result(900001, "", "上传失败:上传路径无效");}String fileName = file.getOriginalFilename();// 获取上传文件扩展名String fileExt = fileName.substring(fileName.lastIndexOf(".") + 1, fileName.length());// 对扩展名进行小写转换fileExt = fileExt.toLowerCase();// 图片文件大小过滤if (!"jpg".equals(fileExt) && !"jpeg".equals(fileExt) && !"png".equals(fileExt) && !"bmp".equals(fileExt)&& !"gif".equals(fileExt)) {Log.info(loghead + "上传失败:无效图片文件类型");return new Result(900001, "", "上传失败:无效图片文件类型");}long fileSize = file.getSize();Log.info(loghead + "fileInfo:fileName=" + fileName + "&fileSize=" + fileSize);if (fileSize <= 0) {Log.info(loghead + "上传失败:文件为空");return new Result(900001, "", "上传失败:文件为空");} else if (fileSize > (500 * 1024)) {Log.info(loghead + "上传失败:文件大小不能超过500K");return new Result(900001, "", "上传失败:文件大小不能超过500K");}File tmpFile = null;// 判断文件是否为空if (!file.isEmpty()) {String uploadPath = request.getSession().getServletContext().getRealPath("/") + "/upload/";File uploadDir = new File(uploadPath);if (uploadDir.exists() && uploadDir.isDirectory()) {String[] childFileNameList = uploadDir.list();if (childFileNameList != null) {File temp;for (int i = 0; i < childFileNameList.length; i++) {temp = new File(uploadPath + childFileNameList[i]);if (temp.isFile()) {temp.delete();}}}} else {uploadDir.mkdir();}try {Date now = new Date();String tmpFileName = String.valueOf(now.getTime()) + Math.round(Math.random() * 1000) + "." + fileExt;// 文件保存路径String tmpFilePath = uploadPath + tmpFileName;tmpFile = new File(tmpFilePath);file.transferTo(tmpFile);BufferedImage sourceImg = ImageIO.read(new FileInputStream(tmpFile));int imgWidth = sourceImg.getWidth();int imgHeight = sourceImg.getHeight();System.out.println("上传的图片宽：" + imgWidth);System.out.println("上传的图片高：" + imgHeight);// 图片文件尺寸过滤if (sizeRule == null) {// 上传到图片服务器String imgUrl = Upload.upload(tmpFile, "/" + pathName + "/");json.put("fileName", fileName);json.put("url", imgUrl);json.put("imgWidth", imgWidth);json.put("imgHeight", imgHeight);return new Result(0, json, "success");} else {System.out.println("前端选择图片尺寸规则" + sizeRule);int ruleWidth = 0;int ruleHeight = 0;try {String imgSizeRule = ConstantsConfig.getString("UPLOADIMG_RULE" + sizeRule);String imgSizeRule_width_height[] = imgSizeRule.split(",");String imgSizeRule_width = imgSizeRule_width_height[0];String imgSizeRule_height = imgSizeRule_width_height[1];ruleWidth = Integer.parseInt(imgSizeRule_width);ruleHeight = Integer.parseInt(imgSizeRule_height);} catch (Exception e) {System.out.println("没有配置尺寸规则" + sizeRule);json.put("fileName", fileName);json.put("imgWidth", imgWidth);json.put("imgHeight", imgHeight);return new Result(-1, json, "配置系统没有配置上传图片尺寸规则" + sizeRule+ ",请前端修改参数sizeRule值或管理员在配置系统配置sizeRule" + sizeRule + "规则对应的配置项");}if (isDeviation == null) {System.out.println("严格限制图片尺寸");if (ruleWidth == imgWidth && ruleHeight == imgHeight) {String imgUrl = Upload.upload(tmpFile, "/" + pathName + "/");json.put("fileName", fileName);json.put("url", imgUrl);json.put("imgWidth", imgWidth);json.put("imgHeight", imgHeight);return new Result(0, json, "success");} else {json.put("fileName", fileName);json.put("imgWidth", imgWidth);json.put("imgHeight", imgHeight);json.put("ruleWidth", ruleWidth);json.put("ruleHeight", ruleHeight);return new Result(-1, json, "请上传" + ruleWidth + "*" + ruleHeight + "px的图片");}} else {int deviation = Integer.parseInt(ConstantsConfig.getString("UPLOADIMG_DEVIATION"));System.out.println("允许尺寸误差在" + deviation + "以内");if (Math.abs(ruleWidth - imgWidth) <= deviation&& Math.abs(ruleHeight - imgHeight) <= deviation) {String imgUrl = Upload.upload(tmpFile, "/" + pathName + "/");json.put("fileName", fileName);json.put("url", imgUrl);json.put("imgWidth", imgWidth);json.put("imgHeight", imgHeight);return new Result(0, json, "success");} else {json.put("fileName", fileName);json.put("imgWidth", imgWidth);json.put("imgHeight", imgHeight);json.put("ruleWidth", ruleWidth);json.put("ruleHeight", ruleHeight);return new Result(-1, json, "请上传" + ruleWidth + "*" + ruleHeight + "px的图片");}}}} catch (Exception e) {e.printStackTrace();Log.info(loghead + "上传失败:文件上传失败");return new Result(900001, "", "上传失败:文件上传异常");} finally {// 删除临时文件if (tmpFile.exists()) {tmpFile.deleteOnExit();Log.info(loghead + "删除临时文件" + tmpFile.getAbsolutePath());}}}return new Result(-1, json, "后台校验上传图片流程异常");}}