package com.xxx.Controller;import com.xxx.Tools.ImgTool;
import com.xxx.bean.Msg;
import org.apache.tomcat.util.http.fileupload.FileUploadBase;
import org.apache.tomcat.util.http.fileupload.FileUploadBase.*;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;@RestController
@RequestMapping(value = "/img")
public class ImgUploadController {@PostMapping(value = "/upload")public Msg uploadImg(@RequestParam(value = "img") MultipartFile img, HttpServletRequest request) throws IOException, FileSizeLimitExceededException {if (img == null){return Msg.fail().add("describe", "参数不能为空");} else {try {Map<String , Object> map = new HashMap<>();map = ImgTool.upload(img, request);if (map.get("resultStr").equals("300")){return Msg.fail().add("describe", "文件格式不支持");} else {return Msg.success().add("imgurl", map.get("resultStr"));}} catch (Exception e){return Msg.fail().add("describe", e);}}}
}

package com.xxx.Tools;import com.xxx.bean.Picture;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.http.HttpServletRequest;
import java.io.File;
import java.io.IOException;
import java.util.Calendar;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;public class ImgTool {/*** 上传图片，并返回图片路径*/public static Map<String, Object> upload(MultipartFile file, HttpServletRequest request) throws IOException {Map<String, Object> map = new HashMap<>();//过滤合法的文件类型String fileName = file.getOriginalFilename();String suffix = fileName.substring(fileName.lastIndexOf(".") + 1);String allowSuffixs = "gif,jpg,jpeg,bmp,png,ico";if (allowSuffixs.indexOf(suffix) == -1){//300代表文件格式不支持map.put("resultStr", "300");System.out.println("文件格式不支持");return map;}//获取真实路径String localPath = request.getServletContext().getRealPath("/");//创建新目录String uri = File.separator + getNowDateStr(File.separator);File dir = new File(localPath + "/static/ProjectImgs/" + uri);if (!dir.exists()){dir.mkdirs();}//创建新文件String newFileName = getUniqueFileName();File f = new File(dir.getPath() + File.separator + newFileName + "." + suffix);//将输入流中的数据复制到新文件
        org.apache.commons.io.FileUtils.copyInputStreamToFile(file.getInputStream(), f);//创建picture对象Picture pic = new Picture();pic.setLocalPath(f.getAbsolutePath());pic.setName(f.getName());//将路径中的\\替换成/，符合浏览器的分级规则pic.setUrl(localPath.replace("\\", "/")+ "static/ProjectImgs"+ uri.replace("\\", "/") + "/" + newFileName + "." + suffix);//插入到数据库//...
map.put("resultStr", pic.getUrl());return map;}/*** 获取当前日期字符串* @param separator* @return*/public static String getNowDateStr(String separator){Calendar now = Calendar.getInstance();int year = now.get(Calendar.YEAR);//month 记得加一（因为默认从0开始计数）int month = now.get(Calendar.MONTH)+1;int day = now.get(Calendar.DATE);return year + separator + month + separator + day;}//生成唯一的文件名public static String getUniqueFileName(){String str = UUID.randomUUID().toString();return str.replace("-", "");}
}

package com.xxx.bean;import java.util.Date;public class Picture {private String localPath;private String name;private String url;private Date addTime;public Picture() {}public Picture(String localPath, String name, String url, Date addTime) {this.localPath = localPath;this.name = name;this.url = url;this.addTime = addTime;}public String getLocalPath() {return localPath;}public void setLocalPath(String localPath) {this.localPath = localPath;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getUrl() {return url;}public void setUrl(String url) {this.url = url;}public Date getAddTime() {return addTime;}public void setAddTime(Date addTime) {this.addTime = addTime;}
}

package com.xxx;import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.MultipartConfigFactory;
import org.springframework.context.annotation.Bean;
import javax.servlet.MultipartConfigElement;@SpringBootApplication
public class ShouguoApplication {public static void main(String[] args) {SpringApplication.run(ShouguoApplication.class, args);}/*** 文件上传配置*/@Beanpublic MultipartConfigElement multipartConfigElement(){MultipartConfigFactory factory = new MultipartConfigFactory();//maxSizefactory.setMaxFileSize("10240KB");//设置总上传数据总大小factory.setMaxRequestSize("102400KB");return factory.createMultipartConfig();}
}