Spring Cloud整合Oss

第一种方式

关于创建账号和开通Oss步骤省略

导入依赖：

        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alicloud-oss</artifactId>
        </dependency>

部分无关oss的配置省略

spring:
  cloud:
    nacos:
      discovery:
        server-addr: 192.168.162.139:8848
    alicloud:
      access-key: XXXXXXXXXXXXXXXXXXXXXXXX
      secret-key: XXXXXXXXXXXXXXXXXXXXXXXX
      oss:
        endpoint: oss-cn-beijing.aliyuncs.com

测试：

import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClient;
import com.aliyun.oss.OSSClientBuilder;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

import java.io.ByteArrayInputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;

@RunWith(SpringRunner.class)
@SpringBootTest
public class OssTest {

    @Autowired
    OSSClient ossClient;

    @Test
    public void contextLoads() throws FileNotFoundException {

        String bucketName = "wen-jie";
        String objectName = "my1.png";
        // 上传文件到指定的存储空间（bucketName）并将其保存为指定的文件名称（objectName）。
        String content = "C:\Users\wj\Desktop\snipaste_wj_20201012_194158.png";
        ossClient.putObject(bucketName, objectName, new FileInputStream(content));

        // 关闭OSSClient。
        ossClient.shutdown();
    }

}

第二种方式

我们可以将所有关于oss的配置写入nacos配置中心中：

bootstrap.yml配置文件

spring.cloud.nacos.config.server-addr=192.168.162.139:8848
spring.cloud.nacos.config.namespace=2fc98028-fd03-4e6d-9987-4be5124eea10

spring.cloud.nacos.config.ext-config[0].data-id=oss.yml
spring.cloud.nacos.config.ext-config[0].group=DEFAULT_GROUP
spring.cloud.nacos.config.ext-config[0].refresh=true

然后新建一个controller,去获取Policy:

@RefreshScope
@RestController
public class OssController {

    @Resource
    private OSSClient 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 Map<String, String> policy(){
        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 dir = new SimpleDateFormat("yyyy-MM-dd").format(new Date()); // 用户上传文件时指定的前缀。

        // 创建OSSClient实例。
        try {
            long expireTime = 30;
            long expireEndTime = System.currentTimeMillis() + expireTime * 1000;
            Date expiration = new Date(expireEndTime);
            // PostObject请求最大可支持的文件大小为5 GB，即CONTENT_LENGTH_RANGE为5*1024*1024*1024。
            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<String, String> respMap = new LinkedHashMap<String, String>();
            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 respMap;
        } catch (Exception e) {
            // Assert.fail(e.getMessage());
            System.out.println(e.getMessage());
        } finally {
            ossClient.shutdown();
        }
        return null;
    }
}

然后我们直接访问该请求路径，就能获取到policy

然后前端拿到了policy后，就可以把文件上传到oss服务器上。