一：开通阿里云对象存储服务oss,创建bucket，获得密钥
二：在程序中集成上传文件功能
1.连接阿里云OSS对象存储服务器
声明一个配置属性的文件用于传入连接的参数
package com.sky.properties;
import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;
@Component
@ConfigurationProperties(prefix = "sky.alioss")
@Data
public class AliOssProperties {
private String endpoint;
private String accessKeyId;
private String accessKeySecret;
private String bucketName;
}为了充分解耦，声明一个配置属性的类，从外部注入连接的属性值
- @Component： 标注Spring管理的Bean，使用@Component注解在一个类上，表示将此类标记为Spring容器中的一个Bean
- @data:Lombok注解用于生成对应的getter和setter方法
-
@ConfigurationProperties(prefix = "sky.alioss")：负责属性的批量注入
application.yml主配置文件中的配置信息：
spring:
profiles:
用开发环境的配置文件
active: dev
sky:
alioss:
endpoint: ${sky.alioss.endpoint}
bucket-name: ${sky.alioss.bucket-name}
access-key-id: ${sky.alioss.access-key-id}
access-key-secret: ${sky.alioss.access-key-secret}真正是信息配置在：开发环境中：application-dev.yml中
通过配置多份不同环境的配置文件，再通过打包命令指定需要打包的内容之后进行区分打包
sky:
alioss:
endpoint: oss-cn-beijing.aliyuncs.com
bucket-name: waimaiguo
access-key-id: ***************
access-key-secret: *************填写阿里云相关信息，用于连接阿里云
三：封装一个aliyunOssUtil工具类，用于上传文件并拼接返回上传的文件的路径
package com.sky.utils;
import com.aliyun.oss.ClientException;
import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.OSSException;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.extern.slf4j.Slf4j;
import java.io.ByteArrayInputStream;
@Data
@AllArgsConstructor
@Slf4j
public class AliOssUtil {
private String endpoint;
private String accessKeyId;
private String accessKeySecret;
private String bucketName;
/**
* 文件上传
*
* @param bytes
* @param objectName
* @return
*/
public String upload(byte[] bytes, String objectName) {
// 创建OSSClient实例。
OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);
try {
// 创建PutObject请求就是把图片上传到阿里云OSS上。
ossClient.putObject(bucketName, objectName, new ByteArrayInputStream(bytes));
} catch (OSSException oe) {
System.out.println("Caught an OSSException, which means your request made it to OSS, "
+ "but was rejected with an error response for some reason.");
System.out.println("Error Message:" + oe.getErrorMessage());
System.out.println("Error Code:" + oe.getErrorCode());
System.out.println("Request ID:" + oe.getRequestId());
System.out.println("Host ID:" + oe.getHostId());
} catch (ClientException ce) {
System.out.println("Caught an ClientException, which means the client encountered "
+ "a serious internal problem while trying to communicate with OSS, "
+ "such as not being able to access the network.");
System.out.println("Error Message:" + ce.getMessage());
} finally {
if (ossClient != null) {
ossClient.shutdown();
}
}
//文件访问路径规则 https://BucketName.Endpoint/ObjectName
StringBuilder stringBuilder = new StringBuilder("https://");
stringBuilder
.append(bucketName)
.append(".")
.append(endpoint)
.append("/")
.append(objectName);
log.info("文件上传到:{}", stringBuilder.toString());
return stringBuilder.toString();
}
}
四：创建一个配置类用于生成工具类的bean交给spring容器管理
package com.sky.config;
import com.sky.properties.AliOssProperties;
import com.sky.utils.AliOssUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
@Slf4j
public class OssConfiguration {
@Bean
//需要把属性通过参数注入其中
public AliOssUtil aliOssUtil(AliOssProperties aliOssProperties){
log.info("创建阿里云上传文件对象：{}",aliOssProperties);
return new AliOssUtil(aliOssProperties.getEndpoint(),
aliOssProperties.getAccessKeyId(),
aliOssProperties.getAccessKeySecret(),
aliOssProperties.getBucketName());
}
}
五：创建一个controller接受前端的请求
import com.sky.constant.MessageConstant;
import com.sky.result.Result;
import com.sky.utils.AliOssUtil;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;
import java.io.IOException;
import java.util.UUID;
@RestController
@RequestMapping("/admin/common")
@Api (tags = "通用接口")
@Slf4j
public class commonController {
@Autowired
private AliOssUtil aliOssUtil;
@PostMapping("/upload")
@ApiOperation("文件上传")
public Result<String> upload(MultipartFile file){
try {
//接下来就是拼接文件名
String originalFilename = file.getOriginalFilename();
String substring = originalFilename.substring(originalFilename.lastIndexOf("."));
String objectString= UUID.randomUUID()+substring;
//第一参数为：文件的输入流；第二个参数为上传文件的名称；
String upload = aliOssUtil.upload(file.getBytes(), objectString);
return Result.success(upload);
} catch (IOException e) {
System.out.println("文件上传异常:"+e);
}
return Result.error(MessageConstant.UPLOAD_FAILED);
}
}-
MultipartFile file：用于接收前端文件类型的参数
- UUID类负责生成一个新的文件名称；防止文件名称重复
-
return Result.success(upload)
最终返回给前端一个url,前端会请求这个路径回显图片
