SpringBoot文件上传下载

环境设置

server: port: 8080 spring: application: name: kingboy-springboot-file http: multipart: #设置单个文件的大小限制 max-file-size: 100MB #设置单次请求的总大小限制 max-request-size: 1000MB

文件上传接口

@RequestParam(“file”)中的”file”为前台对应的name属性。

@PostMapping

public String upload(@RequestParam("file") MultipartFile file) throws IOException {

//获取文件的大小，以size为准 long size = file.getSize();

int available = file.getInputStream().available();

int length = file.getBytes().length; //获取参数名，也就是"file" String name = file.getName();

//获取文件原本的名称 String originName = file.getOriginalFilename();

//保存文件 String fileName = UUID.randomUUID().toString();

String filePath = "/Users/kingboy/Desktop/" + fileName; Files.copy(file.getInputStream(), Paths.get(filePath));

return String.valueOf(fileName);

}

文件下载

@GetMapping("/{fileName}")

public void download(@PathVariable String fileName, HttpServletRequest request, HttpServletResponse response) throws IOException {

try(ServletOutputStream outputStream = response.getOutputStream()){

String filePath = "/Users/kingboy/Desktop/" + fileName;

Files.copy(Paths.get(filePath), outputStream);

response.setContentType("application/x-download");

response.setHeader("Content-Disposition", "attachment;filename=test.txt");

}

}

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