Java接入OSS(Springboot)

最近有接入OSS的需求，下面讲讲如何接入：

        首先有个OSS服务器，再创建Bucket,可以下载一个OSS客户端，页面如下

    下面步入正题  

      jar包：

   com.aliyun.oss
   aliyun-sdk-oss
   2.2.1

        配置文件：

oss:
  ossaddress: oss-cn-hangzhou.aliyuncs.com（你的OSS服务器地址）
  accessKeyId: 你的ID
  accessKeySecret:  你的密码
  bucketName: 你的bucket名称 --》跟服务器地址拼在一起就是你的访问地址
  filePath: images/ 你的存储文件地址

        读取配置文件，我这边是用的springboot ,配置文件是yml

@Component
@ConfigurationProperties(prefix = "oss")
public class OssProperties {
    private String ossaddress;

    public String getOssaddress() {
        return ossaddress;
    }

    public void setOssaddress(String ossaddress) {
        this.ossaddress = ossaddress;
    }

    private String accessKeyId;
    private String accessKeySecret;
    private String bucketName;
    private String filePath;

    public String getBucketName() {
        return bucketName;
    }

    public void setBucketName(String bucketName) {
        this.bucketName = bucketName;
    }

    public String getFilePath() {
        return filePath;
    }

    public void setFilePath(String filePath) {
        this.filePath = filePath;
    }


    public void setAccessKeyId(String accessKeyId) {
        this.accessKeyId = accessKeyId;
    }

    public void setAccessKeySecret(String accessKeySecret) {
        this.accessKeySecret = accessKeySecret;
    }


    public String getAccessKeyId() {
        return accessKeyId;
    }

    public String getAccessKeySecret() {
        return accessKeySecret;
    }

        然后编写工具类

@Component
public class OSSUtil {
    //log
    private final Logger LOG = LoggerFactory.getLogger(OSSUtil.class);
    @Autowired
    OssProperties ossProperties;
    /**
     * 获取阿里云OSS客户端对象
     * */
    public OSSClient getOSSClient(){
        return new OSSClient(ossProperties.getOssAddress,ossProperties.getAccessKeyId(), ossProperties.getAccessKeySecret());
    }
    /**
     * 新建Bucket  --Bucket权限:私有
     * @param bucketName bucket名称
     * @return true 新建Bucket成功
     * */
    public boolean createBucket(OSSClient client, String bucketName){
        Bucket bucket = client.createBucket(bucketName);
        return bucketName.equals(bucket.getName());
    }
    /**
     * 删除Bucket
     * @param bucketName bucket名称
     * */
    public void deleteBucket(OSSClient client, String bucketName){
        client.deleteBucket(bucketName);
    }
    /**
     * 向阿里云的OSS存储中存储文件  --file也可以用InputStream替代
     * @param client OSS客户端
     * @param file 上传文件
     * @return String 唯一MD5数字签名
     * */
    public String uploadObject2OSS(OSSClient client, File file) {
        String resultStr = null;
        try {
            InputStream is = new FileInputStream(file);
            String fileName = file.getName();
            Long fileSize = file.length();
            //创建上传Object的Metadata
            ObjectMetadata metadata = new ObjectMetadata();
            metadata.setContentLength(is.available());
            metadata.setCacheControl("no-cache");
            metadata.setHeader("Pragma", "no-cache");
            metadata.setContentEncoding("utf-8");
            metadata.setContentType(getContentType(fileName));
            metadata.setContentDisposition("filename/filesize=" + fileName + "/" + fileSize + "Byte.");
            //上传文件
            PutObjectResult putResult = client.putObject(ossProperties.getBucketName(), ossProperties.getFilePath() + fileName, is, metadata);
            //解析结果
            resultStr = putResult.getETag();
            is.close();
        } catch (Exception e) {
            LOG.error("上传阿里云OSS服务器异常." + e.getMessage(), e);
        }
        return resultStr;
    }

    /**
     * 根据key获取OSS服务器上的文件输入流
     * @param client OSS客户端
     * @param bucketName bucket名称
     * @param diskName 文件路径
     * @param key Bucket下的文件的路径名+文件名
     */
    public InputStream getOSS2InputStream(OSSClient client, String bucketName, String filePath, String key){
        OSSObject ossObj = client.getObject(bucketName, filePath + key);
        return ossObj.getObjectContent();
    }

    /**
     * 根据key删除OSS服务器上的文件
     * @param client OSS客户端
     * @param bucketName bucket名称
     * @param diskName 文件路径
     * @param key Bucket下的文件的路径名+文件名
     */
    public void deleteFile(OSSClient client, String bucketName, String filePath, String key){
        client.deleteObject(bucketName, filePath+ key);
        LOG.info("删除" + bucketName + "下的文件" + diskName + key + "成功");
    }

    /**
     * 通过文件名判断并获取OSS服务文件上传时文件的contentType
     * @param fileName 文件名
     * @return 文件的contentType
     */
    public final String getContentType(String fileName){
        String fileExtension = fileName.substring(fileName.lastIndexOf(".")+1);
        if("bmp".equalsIgnoreCase(fileExtension)) return "image/bmp";
        if("gif".equalsIgnoreCase(fileExtension)) return "image/gif";
        if("jpeg".equalsIgnoreCase(fileExtension) || "jpg".equalsIgnoreCase(fileExtension)  ) return "image/jpeg";
        if("png".equalsIgnoreCase(fileExtension)) return "image/png";
        if("html".equalsIgnoreCase(fileExtension)) return "text/html";
        if("txt".equalsIgnoreCase(fileExtension)) return "text/plain";
        if("vsd".equalsIgnoreCase(fileExtension)) return "application/vnd.visio";
        if("ppt".equalsIgnoreCase(fileExtension) || "pptx".equalsIgnoreCase(fileExtension)) return "application/vnd.ms-powerpoint";
        if("doc".equalsIgnoreCase(fileExtension) || "docx".equalsIgnoreCase(fileExtension)) return "application/msword";
        if("xml".equalsIgnoreCase(fileExtension)) return "text/xml";
        return "text/html";
    }

    /**
     * 销毁
     */
    public void destory(OSSClient client) {
        client.shutdown();
    }
}
                                                                                                            

最后上传测试：

@Autowired OSSUtil ossUtil;

@Test
public void testUploadImage(){
    OSSClient client = ossUtil.getOSSClient();
    String flilePathName = "E:\\1.png";
    File file = new File(flilePathName);
    String md5key = ossUtil.uploadObject2OSS(client, file);
    System.out.print("上传后的文件MD5数字唯一签名:" + md5key);

ossUtil.destory(client);

}完成，后续根据自己的业务调用更多的接口。

我是要实现图片上传，再加图片读取功能，在读取图片时不需要验证，所以把bucket开发读取权限；

后面有个OSS跨域访问的坑，现在已经找到解决方案：

    在上传图片时加入以下头声明

metadata.setHeader("Access-Control-Allow-Origin","*");
metadata.setHeader("Access-Control-Allow-Methods","POST GET HEAD PUT DELETE");
metadata.setHeader("Access-Control-Max-Age","3600");