java实现文件上传
前端页面
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org" xmlns:sec="http://www.thymeleaf.org/thymeleaf-extras-springsecurity3">
<head>
<meta charset="UTF-8" />
<title>Insert title here</title>
</head>
<body>
<h1 th:inlines="text">文件上传</h1>
<form action="地址" method="post" enctype="multipart/form-data">
<p>选择文件: <input type="file" name="file"/></p>
<p><input type="submit" value="提交"/></p>
</form>
</body>
</html>
使用enctype=“multipart/form-data” method="post"来表示进行文件上传
后端接口
@Slf4j
@RestController
public class UploadFileController {
@PostMapping("/upload")
public String upload(@RequestParam("file")MultipartFile file, HttpServletRequest request){
try {
if (file.isEmpty()){
return "file is empty";
}
String filename = file.getOriginalFilename();
log.info("上传文件名为："+filename);
//设置文件存储路径
String filePath = "路径";
String path = filePath+filename;
log.info("path为"+path);
File dest = new File(path);
if (!dest.getParentFile().exists()){
dest.getParentFile().mkdirs(); //新建文件夹
}
file.transferTo(dest);//文件写入
return "upload success";
}catch (IllegalStateException e){
e.printStackTrace();
}catch (IOException e){
e.printStackTrace();
}
return "upload failure";
}
}