文件上传

1 阿里云服务器

1.1 导入依赖

		//阿里云服务器
		<dependency>
			<groupId>com.aliyun.oss</groupId>
			<artifactId>aliyun-sdk-oss</artifactId>
			<version>3.15.1</version>
		</dependency>
		//配置文件的Configuration properties
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-configuration-processor</artifactId>
			<optional>true</optional>
		</dependency>

1.2 实体类设置

import lombok.Data;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;

@Component
@Data
@ConfigurationProperties(prefix = "alis.os")
public class AliOsProperties {
    private String endpoint;

    private String accessKeyId;

    private String accessKeySecret;

    private String bucketName;
}

1.3 设置工具类

package com.itheima.utils;

import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClientBuilder;
import com.itheima.pojo.AliOsProperties;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
import org.springframework.web.multipart.MultipartFile;
import java.io.*;
import java.util.UUID;

/**
 * 阿里云 OSS 工具类
 */
@Component
public class AliOSSUtils {

    //Component实体类Configuration properties
    @Autowired
    private AliOsProperties aliOsProperties;

    /**
     * 实现上传图片到OSS
     */
    public String upload(MultipartFile file) throws IOException {
        // 获取上传的文件的输入流
        InputStream inputStream = file.getInputStream();

        // 避免文件覆盖
        String originalFilename = file.getOriginalFilename();
        String fileName = UUID.randomUUID().toString() + originalFilename.substring(originalFilename.lastIndexOf("."));

        // 上传文件到 OSS
        OSS ossClient = new OSSClientBuilder().build(aliOsProperties.getEndpoint(), aliOsProperties.getAccessKeyId(), aliOsProperties.getAccessKeySecret());
        ossClient.putObject(aliOsProperties.getBucketName(), fileName, inputStream);

        // 文件访问路径
        String url = aliOsProperties.getEndpoint().split("//")[0] + "//" + aliOsProperties.getBucketName() + "." + aliOsProperties.getEndpoint().split("//")[1] + "/" + fileName;
        // 关闭ossClient
        ossClient.shutdown();
        return url;// 把上传到oss的路径返回
    }

}

1.4 配置文件

spring:
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/webapp
    username: root
    password: root
  servlet:
  //multipart最大文件大小
    multipart:
      max-file-size: 10MB
      max-request-size: 100MB

alis:
  os:
    endpoint: https://oss-cn-beijing.aliyuncs.com
    accessKeyId: LTAI5tQLYaCkBL323KewaEAf32
    accessKeySecret: 5FlUm97LLrFEFEkkJsFEA
    bucketName: newBucket