阿里云OSS接入

阿里云OSS接入

1、pom.xml引入依赖

<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-alibaba-dependencies</artifactId>
            <version>2.2.0.RELEASE</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>
<!-- 阿里云OSS-->
<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-starter-alicloud-oss</artifactId>
</dependency>

2、application.yml配置文件中添加相关配置

spring:
	cloud:
		alicloud:
            access-key: 填写阿里云账号的access-key
            secret-key: 填写阿里云账号的secret-key
            oss:
                endpoint: 填写OSS里面bucket的endpoint
                bucket: 填写OSS里面bucket的名称

3、新增一个controller类

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 org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import java.io.InputStream;
import java.nio.charset.StandardCharsets;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.UUID;

@RestController
@RequestMapping("/oss")
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;

    /**
     * 方式二、先通过接口返回相关密钥等信息，再通过前端直接上传到OSS对象存储
     */
    @GetMapping("/aliyun")
    public Map<String, String> aliyunOss(){
		// oss请求路径
        String host = "https://" + bucket + "." + endpoint;

        // 用户上传文件时指定的前缀
        String dir = new SimpleDateFormat("yyyy-MM-dd").format(new Date()) + "/";

        Map<String, String> respMap = null;
        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(StandardCharsets.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));

        } catch (Exception e) {
            // Assert.fail(e.getMessage());
            System.out.println(e.getMessage());
        } finally {
            ossClient.shutdown();
        }
        return respMap;
    }
    
    /**
     * 方式一、将文件对象直接请求服务端上传
     */
    @PostMapping("/aliyun2")
    public String upload(@RequestParam("file") MultipartFile file) throws Exception {

        String path = new SimpleDateFormat("yyyy-MM-dd").format(new Date());
        String uuid = UUID.randomUUID().toString();
        String fileName = file.getOriginalFilename();
        String url =  path + "/" + uuid + fileName;

        InputStream in = file.getInputStream();
        ossClient.putObject(bucket, url, in);
        ossClient.shutdown();
        return url;
    }
}