阿里云OSS图片存储

        阿里云对象存储 OSS（Object Storage Service）是一款海量、安全、低成本、高可靠的云存储服务，提供最高可达 99.995 % 的服务可用性。多种存储类型供选择，全面优化存储成本。

视频介绍

 创建bucket

开发文档

上传文件demo （微改）

package com.beijing.gulimall.order;
 
import com.aliyun.oss.ClientException;
import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.OSSException;
import com.aliyun.oss.common.auth.CredentialsProvider;
import com.aliyun.oss.common.auth.DefaultCredentialProvider;
import java.io.FileInputStream;
import java.io.InputStream;
 
public class uploadFile {
 
    public static void main(String[] args) throws Exception {
 
 
        // RAM用户的访问密钥（AccessKey ID和AccessKey Secret）。
        String accessKeyId = "";
        String accessKeySecret = "";
        // 使用代码嵌入的RAM用户的访问密钥配置访问凭证。
        CredentialsProvider credentialsProvider = new DefaultCredentialProvider(accessKeyId, accessKeySecret);
 
        // Endpoint以华东1（杭州）为例，其它Region请按实际情况填写。
        String endpoint = "https://oss-cn-beijing.aliyuncs.com";
        // 从环境变量中获取访问凭证。运行本代码示例之前，请确保已设置环境变量OSS_ACCESS_KEY_ID和OSS_ACCESS_KEY_SECRET。
        // 填写Bucket名称，例如examplebucket。
        String bucketName = "gulimall-hellohai";
        // 填写Object完整路径，例如exampledir/exampleobject.txt。Object完整路径中不能包含Bucket名称。
        String objectName = "13.jpg";
 
        // 创建OSSClient实例。
        OSS ossClient = new OSSClientBuilder().build(endpoint, credentialsProvider);
 
        try {
            String content = "hello";
            //上传文件流
            InputStream inputStream = new FileInputStream("D:\\1.jpg");
            ossClient.putObject(bucketName, objectName, inputStream);
        } catch (OSSException oe) {
 
        } catch (ClientException ce) {
 
        } finally {
            if (ossClient != null) {
                ossClient.shutdown();
            }
        }
    }
}

对OSS进行配置封装至spring 容器

        <dependency>
            <groupId>com.alibaba.cloudgroupId>
            <artifactId>spring-cloud-starter-alicloud-ossartifactId>
        dependency>

 将配置数据放在application.yml中

spring:
  cloud:
    alicloud:
      access-key: LTAI
      secret-key: ISqg
      oss:
        endpoint: oss-cn-beijing.aliyuncs.com
        bucket: gulimall-hellohai

对应的java代码（简写）

@Resource
OSSClient ossClient;
 
ossClient.putObject(bucketName, objectName, inputStream);

以上使用的方式都是

项目中OSS的使用可以改进为

这样可以节省很多资源，不需要把文件发送到controller层，直接发送给OSS就可以

 获得签名信息

package com.lihailin.gulimall.thirdparty.controller;
 
import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClient;
import com.aliyun.oss.common.utils.BinaryUtil;
import com.aliyun.oss.model.MatchMode;
import com.aliyun.oss.model.PolicyConditions;
import com.lihailin.common.utils.R;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
 
import javax.annotation.Resource;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.LinkedHashMap;
import java.util.Map;
 
@RestController
public class ossController {
 
    @Resource
    OSS ossClient;
 
    @Value("${spring.cloud.alicloud.oss.endpoint}")
    private String endpoint;
 
    @Value("${spring.cloud.alicloud.oss.bucket}")
    private String bucket;
 
    @Value("${spring.cloud.alicloud.access-key}")
    private String accessId;
 
    @RequestMapping("/oss/policy")
    public R policy() {
 
 
 
        //https://gulimall-hello.oss-cn-beijing.aliyuncs.com/hahaha.jpg
 
        String host = "https://" + bucket + "." + endpoint; // host的格式为 bucketname.endpoint
        // callbackUrl为 上传回调服务器的URL，请将下面的IP和Port配置为您自己的真实信息。
//        String callbackUrl = "http://88.88.88.88:8888";
        String format = new SimpleDateFormat("yyyy-MM-dd").format(new Date());
        String dir = format + "/"; // 用户上传文件时指定的前缀。
 
        Map respMap = null;
        try {
            long expireTime = 30;
            long expireEndTime = System.currentTimeMillis() + expireTime * 1000;
            Date expiration = new Date(expireEndTime);
            PolicyConditions policyConds = new PolicyConditions();
            policyConds.addConditionItem(PolicyConditions.COND_CONTENT_LENGTH_RANGE, 0, 1048576000);
            policyConds.addConditionItem(MatchMode.StartWith, PolicyConditions.COND_KEY, dir);
 
            String postPolicy = ossClient.generatePostPolicy(expiration, policyConds);
            byte[] binaryData = postPolicy.getBytes("utf-8");
            String encodedPolicy = BinaryUtil.toBase64String(binaryData);
            String postSignature = ossClient.calculatePostSignature(postPolicy);
 
            respMap = new LinkedHashMap();
            respMap.put("accessid", accessId);
            respMap.put("policy", encodedPolicy);
            respMap.put("signature", postSignature);
            respMap.put("dir", dir);
            respMap.put("host", host);
            respMap.put("expire", String.valueOf(expireEndTime / 1000));
            // respMap.put("expire", formatISO8601Date(expiration));
 
 
        } catch (Exception e) {
            // Assert.fail(e.getMessage());
            System.out.println(e.getMessage());
        }
 
        return R.ok().put("data",respMap);
    }
}