后端集成OSS
# 一、新建云存储微服务
# 1、创建模块
Artifact:guli-commonservice-oss

# 2、配置pom.xml
<dependency>
<groupId>com.guli</groupId>
<artifactId>guli-framework-common</artifactId>
<version>0.0.1-SNAPSHOT</version>
</dependency>
<!--aliyunOSS-->
<dependency>
<groupId>com.aliyun.oss</groupId>
<artifactId>aliyun-sdk-oss</artifactId>
<version>2.8.3</version>
</dependency>
<!--日期时间工具-->
<dependency>
<groupId>joda-time</groupId>
<artifactId>joda-time</artifactId>
<version>2.10.1</version>
</dependency>
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# 3、配置application.properties
#服务端口
server.port=8001
#服务名
spring.application.name=guli-oss
#环境设置:dev、test、prod
spring.profiles.active=dev
#阿里云 OSS
#不同的服务器,地址不同
aliyun.oss.file.endpoint=your endpoint
aliyun.oss.file.keyid=your accessKeyId
aliyun.oss.file.keysecret=your accessKeySecret
#bucket可以在控制台创建,也可以使用java代码创建
aliyun.oss.file.bucketname=guli-file
aliyun.oss.file.filehost=avatar
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# 4、logback-spring.xml
修改日志路径
# 5、创建启动类
创建OssApplication.java
package com.guli.oss;
@SpringBootApplication
@ComponentScan(basePackages={"com.guli.oss","com.guli.common"})
public class OssApplication {
public static void main(String[] args) {
SpringApplication.run(OssApplication.class, args);
}
}
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# 6、启动项目
报错

spring boot 会默认加载org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration这个类,
而DataSourceAutoConfiguration类使用了@Configuration注解向spring注入了dataSource bean,又因为项目(oss模块)中并没有关于dataSource相关的配置信息,所以当spring创建dataSource bean时因缺少相关的信息就会报错。
解决办法:
方法1、在@SpringBootApplication注解上加上exclude,解除自动加载DataSourceAutoConfiguration
@SpringBootApplication(exclude = DataSourceAutoConfiguration.class)
方法2、common项目中mybatis-plus-boot-starter配置添加*
此种方式会引起后续的包扫描问题,后面再详解,此处先使用第一种方式
# 二、实现文件上传
# 1、从配置文件读取常量
创建常量读取工具类:ConstantPropertiesUtil.java
使用@Value读取application.properties里的配置内容
用spring的 InitializingBean 的 afterPropertiesSet 来初始化配置信息,这个方法将在所有的属性被初始化后调用。
package com.guli.oss.util;
/**
* 常量类,读取配置文件application.properties中的配置
*/
@Component
//@PropertySource("classpath:application.properties")
public class ConstantPropertiesUtil implements InitializingBean {
@Value("${aliyun.oss.file.endpoint}")
private String endpoint;
@Value("${aliyun.oss.file.keyid}")
private String keyId;
@Value("${aliyun.oss.file.keysecret}")
private String keySecret;
@Value("${aliyun.oss.file.filehost}")
private String fileHost;
@Value("${aliyun.oss.file.bucketname}")
private String bucketName;
public static String END_POINT;
public static String ACCESS_KEY_ID;
public static String ACCESS_KEY_SECRET;
public static String BUCKET_NAME;
public static String FILE_HOST ;
@Override
public void afterPropertiesSet() throws Exception {
END_POINT = endpoint;
ACCESS_KEY_ID = keyId;
ACCESS_KEY_SECRET = keySecret;
BUCKET_NAME = bucketName;
FILE_HOST = fileHost;
}
}
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# 2、文件上传
创建Service接口:FileService.java
package com.guli.oss.service;
public interface FileService {
/**
* 文件上传至阿里云
* @param file
* @return
*/
String upload(MultipartFile file);
}
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实现:FileServiceImpl.java
参考SDK中的:Java->上传文件->简单上传->流式上传->上传文件流

package com.guli.oss.service.impl;
public class FileServiceImpl implements FileService {
@Override
public String upload(MultipartFile file) {
//获取阿里云存储相关常量
String endPoint = ConstantPropertiesUtil.END_POINT;
String accessKeyId = ConstantPropertiesUtil.ACCESS_KEY_ID;
String accessKeySecret = ConstantPropertiesUtil.ACCESS_KEY_SECRET;
String bucketName = ConstantPropertiesUtil.BUCKET_NAME;
String fileHost = ConstantPropertiesUtil.FILE_HOST;
String uploadUrl = null;
try {
//判断oss实例是否存在:如果不存在则创建,如果存在则获取
OSSClient ossClient = new OSSClient(endPoint, accessKeyId, accessKeySecret);
if (!ossClient.doesBucketExist(bucketName)) {
//创建bucket
ossClient.createBucket(bucketName);
//设置oss实例的访问权限:公共读
ossClient.setBucketAcl(bucketName, CannedAccessControlList.PublicRead);
}
//获取上传文件流
InputStream inputStream = file.getInputStream();
//构建日期路径:avatar/2019/02/26/文件名
String filePath = new DateTime().toString("yyyy/MM/dd");
//文件名:uuid.扩展名
String original = file.getOriginalFilename();
String fileName = UUID.randomUUID().toString();
String fileType = original.substring(original.lastIndexOf("."));
String newName = fileName + fileType;
String fileUrl = fileHost + "/" + filePath + "/" + newName;
//文件上传至阿里云
ossClient.putObject(bucketName, fileUrl, inputStream);
// 关闭OSSClient。
ossClient.shutdown();
//获取url地址
uploadUrl = "http://" + bucketName + "." + endPoint + "/" + fileUrl;
} catch (IOException e) {
throw new GuliException(ResultCodeEnum.FILE_UPLOAD_ERROR);
}
return uploadUrl;
}
}
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添加枚举
FILE_UPLOAD_ERROR(false, 21004, "文件上传错误");
# 3、控制层
创建controller:FileUploadController.java
package com.guli.oss.controller;
@Api(description="阿里云文件管理")
@CrossOrigin //跨域
@RestController
@RequestMapping("/admin/oss/file")
public class FileController {
@Autowired
private FileService fileService;
/**
* 文件上传
*
* @param file
*/
@ApiOperation(value = "文件上传")
@PostMapping("upload")
public R upload(
@ApiParam(name = "file", value = "文件", required = true)
@RequestParam("file") MultipartFile file) {
String uploadUrl = fileService.upload(file);
//返回r对象
return R.ok().message("文件上传成功").data("url", uploadUrl);
}
}
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# 4、重启oss服务
# 5、配置Swagger
package com.guli.oss.config;
@Configuration
@EnableSwagger2
public class Swagger2Config {
@Bean
public Docket webApiConfig(){
return new Docket(DocumentationType.SWAGGER_2)
.apiInfo(webApiInfo())
.select()
.paths(Predicates.not(PathSelectors.regex("/error.*")))
.build();
}
private ApiInfo webApiInfo(){
return new ApiInfoBuilder()
.title("文件上传通用服务")
.description("本文档描述了文件上传通用服务接口定义")
.version("1.0")
.contact(new Contact("Helen", "http://atguigu.com", "[email protected]"))
.build();
}
}
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# 6、Swagger中测试文件上传
# 7、配置nginx反向代理
将接口地址加入nginx配置
location ~ /oss/ {
proxy_pass http://localhost:8001;
}
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重启nginx
nginx -s reload