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) @ResponseBody public 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"); } }
本文转自：koushr