SpringBoot文件上传

àì夳堔傛蜴生んèń 2022-01-10 02:09 297阅读 0赞

项目目录如下  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3JqMjAxNzIxMTgxMQ_size_16_color_FFFFFF_t_70]  
1.创建maven项目，导入springboot的maven依赖  
pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
      <modelVersion>4.0.0</modelVersion>
       <parent>
    		<groupId>org.springframework.boot</groupId>
    		<artifactId>spring-boot-starter-parent</artifactId>
    		<version>1.5.2.RELEASE</version>
    
    	</parent>
    
      <groupId>per.czt.07-spring-boot-fileupload</groupId>
      <artifactId>07-spring-boot-fileupload</artifactId>
      <version>0.0.1-SNAPSHOT</version>
      <packaging>jar</packaging>
    
      <name>07-spring-boot-fileupload</name>
      <url>http://maven.apache.org</url>
    
    <properties>
    		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    		<java.version>1.7</java.version>
    	</properties>
    
    	<dependencies>
    		<dependency>
    			<groupId>junit</groupId>
    			<artifactId>junit</artifactId>
    			<version>3.8.1</version>
    			<scope>test</scope>
    		</dependency>
    
    		
    		
    
    		
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-web</artifactId>
    		</dependency>
    	</dependencies>
    </project>

2.文件目录  
编写上传文件的html文件  
upload.html

<!doctype html>
    <html>
    <head>
    </head>
    <body>
    
    <form action="fileUploadController" method="post" enctype="multipart/form-data">
    	上传文件:<input type="file" name="fileName">
    	<br/>
    	<input type="submit" >
    
    </form>
    </body>
    </html>

编写控制器  
FileUploadController.Class

package per.czt.controller;
    
    import java.io.File;
    import java.io.IOException;
    import java.util.HashMap;
    import java.util.Map;
    
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    import org.springframework.web.multipart.MultipartFile;
    
    @RestController//=@Controller+@ResponseBody,表示该类下的方法会自动做json的转换
    public class FileUploadController {
    	/*
    	 * 处理文件上传
    	 */
    	@RequestMapping("/fileUploadController")
    	public Map<String,Object> fileUpload(MultipartFile fileName) throws IllegalStateException, IOException{
    		System.out.println(fileName.getOriginalFilename());
    		fileName.transferTo(new File("d:/desktop/"+fileName.getOriginalFilename()));
    		Map<String,Object> map=new HashMap<String,Object>();
    		map.put("msg", "fileUpload success");
    		return map;
    	}
    	
    
    }

application.properties限制文件上传单个大小和总大小

spring.http.multipart.maxFileSize=300MB
    spring.http.multipart.maxRequestSize=300MB

编写SpringBoot启动类  
App.Class

package per.czt;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    
    /**
     * Hello world!
     *
     */
    @SpringBootApplication
    public class App 
    {
        public static void main( String[] args )
        {
           SpringApplication.run(App.class, args);
        }
    }

在浏览器地址栏输入 [http://127.0.0.1:8080/upload.html][http_127.0.0.1_8080_upload.html]  
出现![在这里插入图片描述][20190620210250944.png]  
上传一个文件  
开始上传  
上传完成后显示![在这里插入图片描述][20190620210343919.png]  
并且在我们指定上传的位置发现已经成功上传了文件。

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3JqMjAxNzIxMTgxMQ_size_16_color_FFFFFF_t_70]: /images/20220109/54377d1c93a849daa697096528ca952a.png
[http_127.0.0.1_8080_upload.html]: http://127.0.0.1:8080/upload.html
[20190620210250944.png]: /images/20220109/2f40ef7108824acf9fb941f2c4f77f12.png
[20190620210343919.png]: /images/20220109/1033bf12bdf844139ddcac7c21965591.png