4、SpringBoot之文件上传
步骤
- POM文件
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
- 编写上传页面
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<form action="/fileUploadController" method="post" enctype="multipart/form-data">
<input type="file" name="file">
<input type="submit" value="okok">
</form>
</body>
</html>
- 编写Controller
@RestController
public class FileUploadController {
// 文件上传
@PostMapping("/fileUploadController")
public String fileUpload(MultipartFile file)throws Exception{
System.out.println(file.getOriginalFilename());
file.transferTo(new File("D:/" + file.getOriginalFilename()));
return "OK";
}
}
- 修改上传文件大小
上传文件如果超过设定的大小就会报错
Maximum upload size exceeded; nested exception is java.lang.IllegalStateException: org.apache.tomcat.util.http.fileupload.impl.FileSizeLimitExceededException: The field file exceeds its maximum permitted size of 1048576 bytes.
上传文件的大小默认是1m
可以通过配置文件配置文件上传的大小限制
#配置单个上传文件的大小的限制
spring.servlet.multipart.max-file-size=2MB
#配置在一次请求当中上传文件的总容量的大小，默认是10MB
spring.servlet.multipart.max-request-size=10MB
