Spring boot-单个/批量文件上传/删除

缺乏、安全感 2021-10-09 10:16 406阅读 0赞

一：添加依赖：

<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
         
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>jstl</artifactId>
    </dependency>
    <dependency>
        <groupId>org.apache.tomcat.embed</groupId>
        <artifactId>tomcat-embed-jasper</artifactId>
        
    </dependency>

二：application.xml配置文件路径：

#配置上传文件地址
    image.location.path=f:/image/
    #配置文件大小限制
    
    spring.http.multipart.maxFileSize=100Mb
    spring.http.multipart.maxRequestSize=100Mb
    
    #静态页面的访问配置
    
    spring.thymeleaf.cache=false
    spring.thymeleaf.prefix=classpath:/templates/
    spring.thymeleaf.check-template-location=true
    spring.thymeleaf.suffix=.html
    spring.thymeleaf.encoding=UTF-8
    spring.thymeleaf.content-type=text/html
    spring.thymeleaf.mode=HTML5

三：编写静态页面（src/main/resources下建文件夹static（static存放静态文件，比如 css、js、image…）和templates（存放静态页面）两个是同级目录），先在templates 中新建一个 uploadimg.html。

<!DOCTYPE html>
    <html>
      <head>
        <title>uploadimg.html</title>
    
        <meta name="keywords" content="keyword1,keyword2,keyword3"></meta>
        <meta name="description" content="this is my page"></meta>
        <meta name="content-type" content="text/html; charset=UTF-8"></meta>
    
        
    
      </head>
    
      <body>
      <form enctype="multipart/form-data" method="post" action="/dc/fileUpload">
        图片<input type="file" name="file"/>
        <input type="submit" value="上传"/>
        </form>
      </body>
    </html>

四：编写Controller层：

package com.hot.analysis.controller.file;
    
    import java.io.BufferedInputStream;
    import java.io.File;
    import java.io.FileInputStream;
    import java.io.IOException;
    import java.io.OutputStream;
    import java.util.Date;
    import java.util.Random;
    
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    import org.springframework.beans.factory.annotation.Value;
    import org.springframework.web.bind.annotation.PostMapping;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.ResponseBody;
    import org.springframework.web.bind.annotation.RestController;
    import org.springframework.web.multipart.MultipartFile;
    import org.springframework.web.servlet.ModelAndView;
    
    import com.hot.analysis.exception.MyException;
    
    @RestController
    public class FileUploadController {
    	//获取配置文件的路径
    	@Value("${image.location.path}")
    	private String resourceDir;
    	/**
         * 实现文件上传
         * */
    	@RequestMapping(value = "/index")
    	public ModelAndView toIndex() {
    		ModelAndView mv = new ModelAndView("uploadimg");
    		return mv;
    	}
    	  //单个文件上传
        @RequestMapping("/dc/fileUpload")
        @ResponseBody 
        public String fileUpload( MultipartFile file){
        	// 获取上传文件路径
    
        			String uploadPath = file.getOriginalFilename();
        			// 获取上传文件的后缀
        			String fileSuffix = uploadPath.substring(uploadPath.lastIndexOf(".") + 1, uploadPath.length());
        			if (fileSuffix.equals("apk")) {
        				uploadPath = resourceDir;
        			} else {
        				// 上传目录地址
        				// String uploadpath="E:/hot-manage/image/";//windows路径
        				uploadPath =resourceDir;// liux路劲
        			}
        			// 上传文件名
        			String fileName = new Date().getTime() + new Random().nextInt(100) + "." + fileSuffix;
        			File savefile = new File(uploadPath + fileName);
        			if (!savefile.getParentFile().exists()) {
        				savefile.getParentFile().mkdirs();
        			}
        			try {
        				file.transferTo(savefile);
        			} catch (IllegalStateException e) {
        				e.printStackTrace();
        			} catch (IOException e) {
        				e.printStackTrace();
        			}
        			if (fileSuffix.equals("apk")) {
        				return "/apk/" + fileName;
        			} else {
        				return "/image/" + fileName;
        			}
        		}
           
        
     // 批量上传
        @PostMapping("/dc/moreFileUpload")
     	public String bacthFileUpload(MultipartFile[] file) throws MyException {
     		StringBuffer buffer = new StringBuffer();
     		for (MultipartFile multipartFile : file) {
     			String str = fileUpload(multipartFile);
     			buffer.append(str);
     			buffer.append(",");
     		}
     		String all = buffer.substring(0, buffer.length() - 1);
     		return all;
     	}
     // 删除文件
        @PostMapping("/dc/deleteFile")
        public String delFile(String path) {
        	String resultInfo = null;
    		int lastIndexOf = path.lastIndexOf("/");
    		String sb = path.substring(lastIndexOf + 1, path.length());
    		sb = "f:/image/" + sb;
    		File file = new File(sb);
    		if (file.exists()) {
    			if (file.delete()) {
    				resultInfo =  "1-删除成功";
    			} else {
    				resultInfo =  "0-删除失败";
    			}
    		} else {
    			resultInfo = "文件不存在！";
    		}
    
    		return resultInfo;
    	}
        
      //文件下载相关代码
        @RequestMapping("/download")
        public String downloadFile(HttpServletRequest request, HttpServletResponse response) {
            String fileName = "aim_test.txt";// 设置文件名，根据业务需要替换成要下载的文件名
            if (fileName != null) {
                //设置文件路径
                String realPath = "D://aim//";
                File file = new File(realPath , fileName);
                if (file.exists()) {
                    response.setContentType("application/force-download");// 设置强制下载不打开
                    response.addHeader("Content-Disposition", "attachment;fileName=" + fileName);// 设置文件名
                    byte[] buffer = new byte[1024];
                    FileInputStream fis = null;
                    BufferedInputStream bis = null;
                    try {
                        fis = new FileInputStream(file);
                        bis = new BufferedInputStream(fis);
                        OutputStream os = response.getOutputStream();
                        int i = bis.read(buffer);
                        while (i != -1) {
                            os.write(buffer, 0, i);
                            i = bis.read(buffer);
                        }
                        System.out.println("success");
                    } catch (Exception e) {
                        e.printStackTrace();
                    } finally {
                        if (bis != null) {
                            try {
                                bis.close();
                            } catch (IOException e) {
                                e.printStackTrace();
                            }
                        }
                        if (fis != null) {
                            try {
                                fis.close();
                            } catch (IOException e) {
                                e.printStackTrace();
                            }
                        }
                    }
                }
            }
            return null;
        }
        
        
        
      
        }

测试：

![70][]

成功返回路径：

![70 1][]

查看文件夹：

![70 2][]

[70]: /images/20211009/4d496fed3b44450cbe3a1cc6bea25a53.png
[70 1]: /images/20211009/2ef5c517330d4880870963d9b9f2868e.png
[70 2]: /images/20211009/42633cb5933045819a27b8f36008b41d.png