一、环境准备

• idea 2020 版本
• JDK 8
• Maven
• 阿里OSS 对象储存
• Springboot 2.1.18

参考： 阿里OSS 对象储存 ：OSS文档:https://help.aliyun.com/product/31815.html

二、项目搭建

1、创建SprinBoot 项目

使用 Spring Initilizr 项目向导

在 Choose starter service URL 建议使用阿里的镜像源: https://start.aliyun.com , spring官方的镜像源容易无法加载。

2、POM依赖

添加依赖

<dependencies>
    <!--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>

    <!--swagger-->
    <dependency>
        <groupId>io.springfox</groupId>
        <artifactId>springfox-swagger2</artifactId>
        <version>2.7.0</version>
    </dependency>
    <dependency>
        <groupId>io.springfox</groupId>
        <artifactId>springfox-swagger-ui</artifactId>
        <version>2.7.0</version>
    </dependency>

    <!--lombok用来简化实体类：需要安装lombok插件-->
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
    </dependency>
</dependencies>

3、application.properties 配置

# 应用名称
spring.application.name=alioss
# 应用服务 WEB 访问端口
server.port=8080

#阿里云 OSS
#不同的服务器，地址不同，其它Region请按实际情况填写。
aliyun.oss.file.endpoint=oss-cn-shenzhen.aliyuncs.com
# 阿里云主账号AccessKey拥有所有API的访问权限，风险很高。强烈建议您创建并使用RAM账号进行API访问或日常运维，请登录RAM控制台创建RAM账号。
aliyun.oss.file.keyid=<yourAccessKeyId>
aliyun.oss.file.keysecret=<yourAccessKeySecret>
#bucket可以在控制台创建，也可以使用java代码创建
aliyun.oss.file.bucketname=oypicbed
aliyun.oss.file.filehost=ossTest

注意：aliyun.oss.file.endpoint、aliyun.oss.file.keyid 和 aliyun.oss.file.keysecret 需要自己配置

4、启动类

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

@SpringBootApplication
public class AliossApplication {

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

}

5、结构代码编写

utils

InitializingBean接口为bean提供了初始化方法的方式，它只包括afterPropertiesSet方法，凡是继承该接口的类，在初始化bean的时候都会执行该方法。

import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

@Component
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;
    }
}

result

import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.Data;

import java.util.HashMap;
import java.util.Map;

@Data
@ApiModel(value = "全局统一返回结果")
public class Result {

    @ApiModelProperty(value = "是否成功")
    private boolean success;

    @ApiModelProperty(value = "返回码")
    private Integer code;

    @ApiModelProperty(value = "返回消息")
    private String message;

    @ApiModelProperty(value = "返回数据")
    private Map<String, Object> data = new HashMap<String, Object>();

    private Result(){}

    public static Result ok(){
        Result r = new Result();
        r.setSuccess(true);
        r.setCode(ResultCode.OK);
        r.setMessage("成功");
        return r;
    }

    public static Result error(){
        Result r = new Result();
        r.setSuccess(false);
        r.setCode(ResultCode.ERROR);
        r.setMessage("失败");
        return r;
    }

    public Result message(String message){
        this.setMessage(message);
        return this;
    }

    public Result code(Integer code){
        this.setCode(code);
        return this;
    }

    public Result data(String key, Object value){
        this.data.put(key, value);
        return this;
    }

    public Result data(Map<String, Object> map){
        this.setData(map);
        return this;
    }

}

public interface ResultCode {

    int OK = 20000; // 成功

    int ERROR = 20001; // 失败

    int EDU_ID_ERROR = 20002;

}

controller

import com.oy.oss.result.Result;
import com.oy.oss.service.FileService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.CrossOrigin;
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;

@RestController
@RequestMapping("oss")
@CrossOrigin
public class FileController {

    @Autowired
    FileService fileService;

    /**
     * 上传文件、接收请求、返回响应
     * @param file
     * @return
     */
    @PostMapping("file/upload")
    public Result upload(MultipartFile file){
        String url = fileService.upload(file);
        if(!StringUtils.isEmpty(url)){
            return Result.ok().data("url",url);
        }
        return Result.error().message("上次失败");
    }
}

service

public interface FileService {
    String upload(MultipartFile file);
}

service 实现类

import com.aliyun.oss.OSSClient;
import com.oy.oss.service.FileService;
import com.oy.oss.utils.ConstantPropertiesUtil;
import org.joda.time.DateTime;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;
import org.springframework.web.multipart.MultipartFile;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.InputStream;
import java.util.UUID;

@Service
public class FileServiceImpl implements FileService {

    // 图片类型
    private static String TYPESTR[] = {".png",".jpg",".bmp",".gif",".jpeg"};

    @Override
    public String upload(MultipartFile file) {


        OSSClient ossClient = null;
        String url = null;

        try {
            // 创建OSSClient 实例
           ossClient = new OSSClient(ConstantPropertiesUtil.END_POINT,
                    ConstantPropertiesUtil.ACCESS_KEY_ID ,
                    ConstantPropertiesUtil.ACCESS_KEY_SECRET );

           boolean flag = false;
            // 判断 文件格式
            for(String type : TYPESTR){
                if(StringUtils.endsWithIgnoreCase(file.getOriginalFilename(),type)){
                   flag = true;
                   break;
                }
            }

            if(!flag){
                return "图片格式不正确";
            }
            // 判断文件内容
            BufferedImage image = ImageIO.read(file.getInputStream());
            if(image != null){
                System.err.println(String.valueOf(image.getHeight()));
                System.err.println(String.valueOf(image.getWidth()));
            }else{
                return "文件内容不正确";
            }

            // 获取文件名称
            String filename = file.getOriginalFilename();
            // 文件名字: oy.01.jpg
            String ext = filename.substring(filename.lastIndexOf("."));
            String newName = UUID.randomUUID().toString() +ext;
            String dataPath = new DateTime().toString("yyyy/MM/dd");
            String urlPath = ConstantPropertiesUtil.FILE_HOST+"/"+dataPath+"/"+newName;

            // 上传文件流
            InputStream inputStream = file.getInputStream();
            ossClient.putObject(ConstantPropertiesUtil.BUCKET_NAME,urlPath,inputStream);
            url = "https://"+ConstantPropertiesUtil.BUCKET_NAME +"."+ConstantPropertiesUtil.END_POINT+"/"+urlPath;

        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            // 关闭OSSClient.
            ossClient.shutdown();
        }
        return url;
    }
}

config

• 项目使用swagger 来测试

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.service.ApiInfo;
import springfox.documentation.service.Contact;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spring.web.plugins.Docket;
import springfox.documentation.swagger2.annotations.EnableSwagger2;

@Configuration
@EnableSwagger2
public class Swagger2Config {

    @Bean
    public Docket webApiConfig(){

        return new Docket(DocumentationType.SWAGGER_2)
                .groupName("webApi")
                .apiInfo(webApiInfo())
                .select()
                .build();

    }

    private ApiInfo webApiInfo(){

        return new ApiInfoBuilder()
                .title("网站-OSSAPI文档")
                .description("本文档描述了OSS服务接口定义")
                .version("1.0")
                .contact(new Contact("OY", "http://oy6090.com", "2097291754@qq.com"))
                .build();
    }

}

三、测试

• 访问地址：http://localhost:8080/swagger-ui.html

• 测试成功