com.alibaba.cloud
            spring-cloud-alibaba-dependencies
            2.1.0.RELEASE
            pom
            import
        
    

dependencies>
    
        com.alibaba.cloud
        spring-cloud-starter-alicloud-oss
     

*springboot所需坐标没有在此处展示

spring:
  cloud:
    alicloud:
      access-key: 输入自己的ak
      secret-key: 输入自己的sk
      oss:
        endpoint: 输入你服务器的区域地址
        bucket: 桶

package com.zg.gulimall.controller;

import com.aliyun.oss.OSS;
import com.aliyun.oss.common.utils.BinaryUtil;
import com.aliyun.oss.model.MatchMode;
import com.aliyun.oss.model.PolicyConditions;
import com.zg.common.utils.R;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.LinkedHashMap;
import java.util.Map;

@RestController
public class OssController {

    @Autowired
    private 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;
    @GetMapping("/oss/policy")
    public R policy() {
        // 填写Host地址，格式为https://bucketname.endpoint。
        String host = "https://"+bucket+"."+endpoint;
        // 设置上传回调URL，即回调服务器地址，用于处理应用服务器与OSS之间的通信。OSS会在文件上传完成后，把文件上传信息通过此回调URL发送给应用服务器。
//        String callbackUrl = "https://192.168.0.0:8888";
        // 设置上传到OSS文件的前缀，可置空此项。置空后，文件将上传至Bucket的根目录下。
        String format = new SimpleDateFormat("yyyy-MM-dd").format(new Date());
        String dir = format+"/";

        try {
            long expireTime = 600;
            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);

            Map 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));
            return R.ok().put("data", respMap);
        } catch (Exception e) {
            // Assert.fail(e.getMessage());
            System.out.println(e.getMessage());
        }
        return null;
    }
}

总结

该文主要由学习谷粒商城项目的实践过程，技术难度并不大，阿里云官网有文档可以查阅。