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07、SpringBoot实战：SpringBoot文件上传

分类：Springboot2.x实战（2）    2024-03-27    阅读(100)

Spring Boot 文件上传

    • 1.创建项目
  • 2.POM 文件
  • 3.启动类
  • 4.编写上传页面
  • 5.编写 Controller
  • 6.修改上传文件大小

1.创建项目

*

2.POM 文件

<?xml version="1.0" encoding="UTF-8"?>
<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 https://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>2.3.1.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.dqcgm</groupId>
    <artifactId>springbootfileupload</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>springbootfileupload</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</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>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

3.启动类

package com.dqcgm.springbootfileupload;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class SpringbootfileuploadApplication {
   
     

    public static void main(String[] args) {
   
     
        SpringApplication.run(SpringbootfileuploadApplication.class, args);
    }
}

4.编写上传页面

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>UPLOAD</title>
</head>
<body>
    <form action="fileUploadController" method="post" enctype="multipart/form-data">
        <input type="file" name="file">
        <input type="submit" value="upload">
    </form>
</body>
</html>

5.编写 Controller

package com.dqcgm.springbootfileupload.controller;

import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import java.io.File;

@RestController
public class FileUploadController {
   
     
    @PostMapping("fileUploadController")
    public String fileUplad(MultipartFile file) throws Exception{
   
     
        System.out.println(file.getOriginalFilename());
        file.transferTo(new File("c:/"+file.getOriginalFilename()));
        return "OK";
    }
}

6.修改上传文件大小

#配置单个上传文件的大小的限制
spring.servlet.multipart.max-file-size=2MB
#配置在一次请求中上传文件的总容量的限制
spring.servlet.multipart.max-request-size=20MB

运行结果：
源文件：
*
控制台输出：
*
C盘输入：
*

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