阿里云oss，简单上传

程序员金胜技术 2022年11月13日

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描述：oss比较方便，省去了自己搭建文件服务器的时间，价格比较便宜，下面是java基于oss的简单上传代码

a、添加maven依赖

<dependency>
      <groupId>com.aliyun.oss</groupId>
      <artifactId>aliyun-sdk-oss</artifactId>
      <version>2.1.0</version>
</dependency>

b、java代码

public class TestOSSUpload {private static String endpoint = "http://oss-cn-shanghai.aliyuncs.com";
private static String accessKeyId = "你的accessKeyId ";
private static String accessKeySecret = "你的accessKeySecret";
private static String bucketName = "你的bucket";public void putObject(String bucketName, String key, String filePath) throws FileNotFoundException {    // 初始化OSSClient
OSSClient  client = new OSSClient(endpoint, accessKeyId,  accessKeySecret);     // 获取指定文件的输入流
    File file = new File(filePath);
    InputStream content = new FileInputStream(file);    // 创建上传Object的Metadata
    ObjectMetadata meta = new ObjectMetadata();    // 必须设置ContentLength
    meta.setContentLength(file.length());    Date expire = new Date(new Date().getTime() + 30 * 1000);
    meta.setExpirationTime(expire);    // 上传Object.    PutObjectResult result = client.putObject(bucketName, key, content, meta);
    // 打印ETag    System.out.println("etag--------------->"+result.getETag());
}public static void main(String[] args) throws FileNotFoundException {
TestOSSUpload testOSSUpload = new TestOSSUpload();testOSSUpload.putObject(bucketName, "temp3.xlsx", "D:\\temp.xlsx");
File file = new File("D:\\temp.xlsx");
String md5 = testOSSUpload.getFileMD5(file);System.out.println("md5---------------->"+md5);
}public static String getFileMD5(File file) {
    if (!file.isFile()){
      return null;
    }
    MessageDigest digest = null;
    FileInputStream in=null;
    byte buffer[] = new byte[1024];
    int len;
    try {
      digest = MessageDigest.getInstance("MD5");
      in = new FileInputStream(file);
      while ((len = in.read(buffer, 0, 1024)) != -1) {
        digest.update(buffer, 0, len);
      }
      in.close();
    } catch (Exception e) {
      e.printStackTrace();
      return null;
    }
    BigInteger bigInt = new BigInteger(1, digest.digest());
    return bigInt.toString(16).toUpperCase();
  }}