简单使用
添加依赖
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.3</version>
</dependency>
application.yml
spring:
# 文件的上传与下载配置
servlet:
multipart:
max-file-size: 50MB
max-request-size: 50MB
测试页面
<!DOCTYPE html>
<html lang="en" xmlns:th=http://www.thymeleaf.org>
<head>
<meta charset="UTF-8" >
<title>Title</title>
</head>
<body>
<[email protected]{}自动补充当前web项目名 -->
<form th:action="@{/document}" th:method="post" enctype="multipart/form-data">
<input type="file" name="header">
<br>
<br>
<input type="submit" value="提交文件">
</form>
</body>
</html>
控制器
@Controller
@RequestMapping("document")
public class DocumentController {
// 视图页面
@RequestMapping("")
public String documentUI() {
return "upload/upload1";
}
// 处理文件上传处理
@PostMapping("")
@ResponseBody
public Map<String, Object> documentSave(HttpServletRequest request, MultipartFile mf) throws IOException {
Map<String, Object> messages = new HashMap<String, Object>();
messages.put("size", mf.getSize());
messages.put("contentType", mf.getContentType());
messages.put("OriginalFilename", mf.getOriginalFilename());
String path = request.getServletContext().getRealPath("/docu/");
File file = new File(path);
if(!file.exists()) {
file.mkdirs();
}
File file2 = new File( path + mf.getOriginalFilename());
mf.transferTo(file2);
System.out.println("文件大小：" + file2.getTotalSpace());
return messages;
}
}
2. 临时路径设置
SpringBoot文件上传时有个临时路径的
@SpringBootConfiguration
public class MyConfig {
@Bean
MultipartConfigElement multipartConfigElement() {
MultipartConfigFactory factory = new MultipartConfigFactory();
factory.setLocation("C:\\Users\\lrc\\Desktop\\测试\\临时路径");
return factory.createMultipartConfig();
}
}
3. 设置上传的文件生成临时路径的阀值。默认无论上传多大的文件都会将上传的文件生成临时文件