使用阿里云对象存储OSS上传图片工具类

package com.verse.hades.utils;

import com.aliyun.oss.OSSClient;
import com.aliyun.oss.common.auth.CredentialsProvider;
import com.aliyun.oss.common.auth.DefaultCredentialProvider;
import com.aliyun.oss.model.ObjectMetadata;
import com.aliyun.oss.model.PutObjectResult;
import com.verse.hades.config.OSSConfig;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.multipart.MultipartFile;

import java.io.*;
import java.net.URL;
import java.util.Date;

@Slf4j
public class OSSClientUtil {
    //阿里云OSS API的内或外网域名
    private static String ENDPOINT;
    //阿里云OSS API的密钥Access Key ID  
    private static String ACCESS_KEY_ID;
    //阿里云OSS API的密钥Access Key Secret  
    private static String ACCESS_KEY_SECRET;
    //阿里云OSS API的bucket名称  
    private static String BUCKET_NAME;
    //阿里云OSS 上传文件夹
    private static String IMAGE_FOLDER;

    private static CredentialsProvider credentialsProvider;

    private static final long IMAGE_EXPIRE_TIME = 10 * 365 * 24 * 60 * 60 * 1000L;//图片访问链接的过期时间

    private static OSSClient ossClient;

    public OSSClientUtil() {
        ossClient = new OSSClient(ENDPOINT, credentialsProvider, null);
    }

    public static void setConfigInfo(OSSConfig ossClientConfig) {
        OSSClientUtil.ENDPOINT = ossClientConfig.getEndpoint();
        OSSClientUtil.ACCESS_KEY_ID = ossClientConfig.getAccessKeyId();
        OSSClientUtil.ACCESS_KEY_SECRET = ossClientConfig.getAccessKeySecret();
        OSSClientUtil.BUCKET_NAME = ossClientConfig.getBucketName();
        OSSClientUtil.IMAGE_FOLDER = ossClientConfig.getImageFolder();

        credentialsProvider = new DefaultCredentialProvider(ACCESS_KEY_ID, ACCESS_KEY_SECRET);
    }

    /**
     * 初始化
     */
    public static void init() {
        ossClient = new OSSClient(ENDPOINT, credentialsProvider, null);
    }

    /**
     * 销毁
     */
    public static void destory() {
        ossClient.shutdown();
    }

    /**
     * @param: instream
     * @param: fileName
     * @Return: java.lang.String
     * @Decription: 上传图片至OSS
     * @CreateDate: Created in 2018/12/11 16:36
     * @Modify:
     */
    public static String uploadImageToOSS(MultipartFile file, String fileName) {
        if (ossClient == null) {
            init();
        }

        String ret = "";
        try {
            //创建上传Object的Metadata
            ObjectMetadata objectMetadata = new ObjectMetadata();
            objectMetadata.setContentLength(file.getInputStream().available());
            objectMetadata.setCacheControl("no-cache");
            objectMetadata.setHeader("Pragma", "no-cache");
            objectMetadata.setContentType(getcontentType(file.getOriginalFilename().substring(file.getOriginalFilename().lastIndexOf("."))));
            objectMetadata.setContentDisposition("inline;filename=" + fileName);
            //上传文件
            PutObjectResult putResult = ossClient.putObject(BUCKET_NAME, IMAGE_FOLDER + fileName, file.getInputStream(), objectMetadata);
            ret = putResult.getETag();
        } catch (IOException e) {
            log.error("upload file to oss error name={}", fileName, e);
        } finally {
            try {
                if (file.getInputStream() != null) {
                    file.getInputStream().close();
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        return ret;
    }

    /**
     * @param: FilenameExtension
     * @Return: java.lang.String
     * @Decription: 判断OSS服务文件上传时文件的contentType
     * @CreateDate: Created in 2018/12/11 17:19
     * @Modify:
     */
    private static String getcontentType(String FilenameExtension) {
        if (FilenameExtension.equalsIgnoreCase(".bmp")) {
            return "image/bmp";
        }
        if (FilenameExtension.equalsIgnoreCase(".gif")) {
            return "image/gif";
        }
        if (FilenameExtension.equalsIgnoreCase(".jpeg") ||
                FilenameExtension.equalsIgnoreCase(".jpg") ||
                FilenameExtension.equalsIgnoreCase(".png")) {
            return "image/jpeg";
        }
        if (FilenameExtension.equalsIgnoreCase(".html")) {
            return "text/html";
        }
        if (FilenameExtension.equalsIgnoreCase(".txt")) {
            return "text/plain";
        }
        if (FilenameExtension.equalsIgnoreCase(".vsd")) {
            return "application/vnd.visio";
        }
        if (FilenameExtension.equalsIgnoreCase(".pptx") ||
                FilenameExtension.equalsIgnoreCase(".ppt")) {
            return "application/vnd.ms-powerpoint";
        }
        if (FilenameExtension.equalsIgnoreCase(".docx") ||
                FilenameExtension.equalsIgnoreCase(".doc")) {
            return "application/msword";
        }
        if (FilenameExtension.equalsIgnoreCase(".xml")) {
            return "text/xml";
        }
        return "image/jpeg";
    }

    /**
     * @param: fileName
     * @Return: java.lang.String
     * @Decription: 根据图片名称获取图片访问地址
     * @CreateDate: Created in 2018/12/11 17:18
     * @Modify:
     */
    public static String getImageUrl(String fileName) {
        // 设置URL过期时间
        Date expiration = new Date(new Date().getTime() + IMAGE_EXPIRE_TIME);
        // 生成URL
        URL url = ossClient.generatePresignedUrl(BUCKET_NAME, IMAGE_FOLDER + fileName, expiration);
        if (url != null) {
            return url.toString();
        }
        return null;
    }
}