这个图片上传主要实现用户实名认证，截取字符串有点繁琐，有任何建议，欢迎评论提出。
1.首先引入一个jar包
org.springframework.web.multipart;
2.开始上传图片，以文件流接收
package com.qianmo.qmyj.controller; import com.qianmo.qmyj.bean.dto.UserInfo; import com.qianmo.qmyj.bean.request.FindMsgRequest; import com.qianmo.qmyj.bean.request.FindOneMessageRequest; import com.qianmo.qmyj.bean.response.FindMsgResponse; import com.qianmo.qmyj.bean.response.FindOneMessageResponse; import com.qianmo.qmyj.common.Constants; import com.qianmo.qmyj.framework.util.DataVerifyUtil; import com.qianmo.qmyj.service.UserInfoExecuteService; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.ResponseBody; import org.springframework.web.multipart.MultipartFile; import javax.annotation.Resource; import javax.servlet.http.HttpServletRequest; import java.io.File; import java.util.Date; import java.util.HashMap; import java.util.Map; /** * 图片上传 * */ @Controller @RequestMapping(value = "/UploadImageController") public class UploadImageController extends BaseController { Logger logger = LoggerFactory.getLogger(UploadImageController.class); // @Resource // MsgService msgService; @Resource private UserInfoExecuteService userInfoExecuteService; /* * 上传图片； * */ @ResponseBody @RequestMapping(value = "/upload",method = RequestMethod.POST) public Map upload(@RequestParam(value = "imgPath") MultipartFile multipartFile,String userId,String imgType, HttpServletRequest request){ logger.info("——————进入上传图片接口"); Map map=new HashMap(); //IdCard是项目中的文件目录，会自动存到本地项目里 String upload=request.getRealPath("/IdCard/"+ multipartFile.getOriginalFilename()); logger.info("——————进入上传图片接口，upload："+upload); //截取图片名称前面的字符串 String imgIdCardPath = upload.substring(upload.indexOf("D"),upload.lastIndexOf("m")-1); logger.info("——————截取图片名称前面的字符串，imgIdCardPath："+imgIdCardPath); //截取图片名称后面的字符串 String imgIdCardPath2 = upload.substring(upload.indexOf("C")+5,upload.length()); logger.info("——————截取图片名称后面的字符串，imgIdCardPath2："+imgIdCardPath2); Date d=new Date(); long timeStr=d.getTime(); if (imgType.equals("0")){ upload = imgIdCardPath +"face"+ String.valueOf(timeStr)+imgIdCardPath2; }else if(imgType.equals("1")){ upload = imgIdCardPath +"crtA"+ String.valueOf(timeStr)+imgIdCardPath2; }else if(imgType.equals("2")){ upload = imgIdCardPath +"crtB"+ String.valueOf(timeStr)+imgIdCardPath2; } logger.info("——————upload，upload："+upload); //截取图片存入数据库 String imgPath=upload.replaceAll("\\\\","/"); imgPath = imgPath+"0"; imgPath = imgPath.substring(imgPath.indexOf("I"), imgPath.lastIndexOf("0")); logger.info("——————imgPath，imgPath："+imgPath); // System.out.println(str.substring(str.indexOf(">")+1, str.lastIndexOf("<"))); 截取指定两个字符之间的字符 UserInfo cust=userInfoExecuteService.findOneUserStr(userId); logger.info("——————cust："+cust); if (imgType.equals("0")){//0代表头像 File folder = new File(imgIdCardPath); File[] files = folder.listFiles();//如果图片存在，则删除 String str1=cust.getUserFaceImg().substring(cust.getUserFaceImg().indexOf("/")+ Constants.score.one, cust.getUserFaceImg().length()); if (null !=files) { for (File file : files) { if (file.getName().equals(str1)) { file.delete(); break; } } } /*if (!"".equals(cust.getUserFaceImg())||null!=cust.getUserFaceImg()){//如果图片存在，则删除 logger.info("——————如果图片存在，则删除：删除！"); clearFiles(upload); }*/ //获取绝对相对路径 //文件上传到指定路径； try { UserInfo userInfo = new UserInfo(); userInfo.setUserId(userId); userInfo.setUserFaceImg(imgPath); int count = userInfoExecuteService.updateUserImage(userInfo);//修改头像 logger.info("——————修改头像，count："+count); UserInfo customer=userInfoExecuteService.findOneUserStr(userId);//获取最新工人对象 logger.info("——————获取最新工人对象，customer："+customer); multipartFile.transferTo(new File(upload)); logger.info("——————上传头像成功，multipartFile："+upload); //使用给map添加数据并返回； map.put("code","0000"); map.put("imagePath",imgPath); map.put("customer",customer); map.put("message","上传成功！"); return map; }catch (Exception e){ map.put("code","1111"); map.put("message","头像"); map.put("message","上传失败！"); return map; } }else if (imgType.equals("1")){//1代表身份证正面照 File folder = new File(imgIdCardPath); File[] files = folder.listFiles();//如果图片存在，则删除 String str1=cust.getIdCardPositiveImg().substring(cust.getIdCardPositiveImg().indexOf("/")+ Constants.score.one, cust.getIdCardPositiveImg().length()); if (null !=files) { for (File file : files) { if (file.getName().equals(str1)) { file.delete(); break; } } } /*if (!"".equals(cust.getIdCardPositiveImg())||null!=cust.getIdCardPositiveImg()){//如果图片存在，则删除 clearFiles(upload); }*/ //获取绝对相对路径 //文件上传到指定路径； try { UserInfo userInfo = new UserInfo(); userInfo.setUserId(userId); userInfo.setIdCardPositiveImg(imgPath); int count = userInfoExecuteService.updateUserImage(userInfo);//修改头像 multipartFile.transferTo(new File(upload)); //使用给map添加数据并返回； map.put("code","0000"); map.put("imagePath",imgPath); map.put("message","上传成功！"); return map; } catch (Exception e) { e.printStackTrace(); map.put("code","1111"); map.put("CardPicture2","身份证正面"); map.put("message","上传失败！"); return map; } }else if (imgType.equals("2")){//2代表身份证反面照 File folder = new File(imgIdCardPath); File[] files = folder.listFiles();//如果图片存在，则删除 String str1=cust.getIdCardNegativeImg().substring(cust.getIdCardNegativeImg().indexOf("/")+ Constants.score.one, cust.getIdCardNegativeImg().length()); if (null !=files) { for (File file : files) { if (file.getName().equals(str1)) { file.delete(); break; } } } /*if (!"".equals(cust.getIdCardNegativeImg())||null!=cust.getIdCardNegativeImg()){//如果图片存在，则删除 clearFiles(upload); }*/ //获取绝对相对路径 //文件上传到指定路径； try { UserInfo userInfo = new UserInfo(); userInfo.setUserId(userId); userInfo.setIdCardNegativeImg(imgPath); int count = userInfoExecuteService.updateUserImage(userInfo);//修改头像 multipartFile.transferTo(new File(upload)); //使用给map添加数据并返回； map.put("code","0000"); map.put("imagePath",imgPath); map.put("message","上传成功！"); } catch (Exception e) { e.printStackTrace(); map.put("code","1111"); map.put("CardPicture2","身份证反面"); map.put("message","上传失败！"); return map; } }else{ map.clear(); map.put("code","1111"); map.put("message","图片上传失败，类型请选择0（头像）,1（身份证正面照）,2（身份证反面照）"); return map; } return map; } @ResponseBody @RequestMapping(value = "/findMsg",method = RequestMethod.POST) public FindMsgResponse findMsg(FindMsgRequest request){ return userInfoExecuteService.findMsgList(request); } /*** * 查询单个消息 * @param request * @return */ @ResponseBody @RequestMapping(value = "/findJupsh",method = RequestMethod.POST) public FindOneMessageResponse findOneMsg(FindOneMessageRequest request){ return userInfoExecuteService.findOneMsg(request); } /*** * 查询所有消息 * @param request * @return */ @ResponseBody @RequestMapping(value = "/findAllJupsh",method = RequestMethod.POST) public FindMsgResponse findOneMsg(FindMsgRequest request){ return userInfoExecuteService.findMsgList(request); } }