SpringBoot文件的上传与下载

⒈文件实体类

 package cn.coreqi.security.entities;

 public class FileInfo {

     private String path;

     public FileInfo(String path) {
         this.path = path;
     }

     public String getPath() {
         return path;
     }

     public void setPath(String path) {
         this.path = path;
     }
 }

⒉控制器代码

 package cn.coreqi.security.controller;

 import cn.coreqi.security.entities.FileInfo;
 import org.apache.tomcat.util.http.fileupload.IOUtils;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RestController;
 import org.springframework.web.multipart.MultipartFile;

 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import java.io.*;
 import java.util.Date;

 @RestController
 public class FileController {

     @PostMapping("/file")
     public FileInfo upload(MultipartFile file) throws IOException {
         System.out.println(file.getName()); //文件名
         System.out.println(file.getOriginalFilename()); //原始文件名
         String folder = "d:/test";
         File localFile = new File(folder,new Date().getTime() + ".txt");
         file.transferTo(localFile); //将上传的文件写入到本地的文件中
         return new FileInfo(localFile.getAbsolutePath());   //绝对路径
     }

     @GetMapping("/file/{id}")
     public void download(@PathVariable String id, HttpServletRequest request, HttpServletResponse response){
         try(
                 InputStream inputStream = new FileInputStream(new File("d:/test/1553692860875.txt"));
                 OutputStream outputStream = response.getOutputStream();
                 ) {
             response.setContentType("application/x-download");
             response.addHeader("Content-Disposition","attachment;filename=test.txt");
             IOUtils.copy(inputStream,outputStream);
             outputStream.flush();

         } catch (FileNotFoundException e) {
             e.printStackTrace();
         } catch (IOException e) {
             e.printStackTrace();
         }
     }
 }

⒊测试

     /**
      * 上传文件测试
      */
     @Test
     public void whenUploadSuccess() throws Exception {
         //mockMvc.perform(MockMvcRequestBuilders.fileUpload("/file")
         String result = mockMvc.perform(MockMvcRequestBuilders.multipart("/file")
                 .file(new MockMultipartFile("file","test.txt","multipart/form-data","hello upload".getBytes("UTF-8"))))
                 .andExpect(status().isOk())
                 .andReturn().getResponse().getContentAsString();
         System.out.println(result);
     }