rest服处理文件上传

现在的文件上传服务基本上都是先上传，后提交路径

测试用例

    @Test
    public void whenFileUploadSuccess() throws Exception {
        // v5.0+ fileUpLoad方法已经过时了
        String file = mockMvc.perform(multipart("/file")
                                              .file(new MockMultipartFile("file", "test.txt", "multipart/form-data", "hello upload".getBytes())))
                .andExpect(status().isOk())
                .andReturn().getResponse().getContentAsString();
        System.out.println(file);
    }
    
    输出
    {"absolutePath":"G:\\dev\\project\\mrcode\\example\\imooc\\spring-security\\security-demo\\fileUploadTest.txt"}

文件上传服务

    package com.example.demo.web.controller;
    
    import com.example.demo.dto.FileInfo;
    import org.springframework.web.bind.annotation.PostMapping;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    import org.springframework.web.multipart.MultipartFile;
    
    import java.io.File;
    import java.io.IOException;
    
    @RestController
    @RequestMapping("/file")
    public class FileController {
        @PostMapping
        public FileInfo upload(MultipartFile file) throws IOException {
            System.out.println(file.getName());
            System.out.println(file.getOriginalFilename());
            System.out.println(file.getSize());
    
            File localFile = new File("fileUploadTest.txt");
            file.transferTo(localFile);
            return new FileInfo(localFile.getAbsolutePath());
        }
    }

文件下载服务

下载服务好像在测试用例里面没有看到怎么写的；浏览器访问该路径，文件会被下载

    @GetMapping("/{id}")
    public void download(@PathVariable String id, HttpServletRequest request, HttpServletResponse response) {
        try (FileInputStream inputStream = new FileInputStream(new File("G:\\dev\\project\\mrcode\\example\\imooc\\spring-security\\security-demo", id));
             ServletOutputStream outputStream = response.getOutputStream();
        ) {
            // 声明响应类型
            response.setContentType("application/x-download");
            // 下载的文件名称
            response.addHeader("Content-Disposition", "attachment;filename-test.txt");
            IOUtils.copy(inputStream, outputStream);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }