springBoot文件上传_springboot 规定上传文件后缀-优快云博客

本文链接：https://blog.youkuaiyun.com/diandiandelphi/article/details/91492768

本文介绍了一个使用HTML和Java实现的文件上传功能，包括前端HTML表单的设计和后端Java控制器的实现，展示了如何处理文件上传、指定上传路径以及错误处理。

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前端HTML

<!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>文件上传</title>
</head>
<body>
<form enctype="multipart/form-data" method="post" action="/file/upload">
    文件:<input type="file" name="file"/>
    <input type="submit" value="上传"/>
</form>
<form enctype="multipart/form-data" method="post" action="/file/uploadPathName">
    文件:<input type="file" name="file"/>
 指定路径:<input type="text" name="pathName"/>
    <input type="submit" value="上传"/>
</form>
</body>
</html>

后端代码

@RestController
@RequestMapping("/file")
public class FileController  extends BaseController {
	private static final Logger log = LoggerFactory.getLogger(FileController.class);

    @RequestMapping("/upload")
    public Object upload(@RequestParam("file") MultipartFile file, HttpServletRequest request){
    	HashMap<String, Object> map = new HashMap<>();
        try {
        	//获取项目所在目录路径
        	File path = new File("");
        	String filePath = path.getAbsolutePath()+"/static/";
            // 文件名
            String fileName = file.getOriginalFilename();
            log.info("文件名： " + fileName);

            // 文件后缀
            String suffixName = fileName.substring(fileName.lastIndexOf("."));
            log.info("文件后缀名： " + suffixName);

            //创建文件
            File dest = new File(filePath + fileName);
            file.transferTo(dest);
            map.put("success", true);
            return map;
        } catch (IOException e) {
        	map.put("error", e.getMessage());
            e.printStackTrace();
        }
        return map.put("success", false);
    }
    
    @RequestMapping("/uploadPathName")
    public Object uploadPathName(@RequestParam("file") MultipartFile file, HttpServletRequest request,String pathName){
    	HashMap<String, Object> map = new HashMap<>();
        try {
        	File path = new File(pathName);
    		if(!path.exists()) {
    			path.mkdirs();
    		}
            // 文件名
            String fileName = file.getOriginalFilename();
            log.info("文件名： " + fileName);

            // 文件后缀
            String suffixName = fileName.substring(fileName.lastIndexOf("."));
            log.info("文件后缀名： " + suffixName);
            //创建文件
            File dest = new File(pathName + fileName);
            file.transferTo(dest);
            map.put("success", true);
            return map;
        } catch (IOException e) {
        	map.put("error", e.getMessage());
            e.printStackTrace();
        }
        return map.put("success", false);
    }
}

application.yml 配置

spring：  
    servlet:
        multipart:
          max-file-size: 100MB
          max-request-size: 100MB