Upload images to Ali cloud OSS

Before the following code, you need to know bucket, accessKeyId, accessKeySecret, and domain endpoint;

 

pom.xml:

<-! Ali cloud storage -> 
<dependency> 
    <groupId> com.aliyun.oss </ groupId> 
    <artifactId> aliyun-sdk-oss </ artifactId> 
    <Version> 3.5.0 </ Version> 
</ dependency > 


Ali cloud configuration:

static ClientBuilderConfiguration initConf Private () { 
    // create ClientConfiguration. ClientConfiguration is OSSClient configuration class, to configure the proxy, connection timeout parameter, the maximum number of connections and the like. 
    = New new ClientBuilderConfiguration the conf ClientBuilderConfiguration (); 

    // Set OSSClient maximum number of open connections HTTP, the default is 1024. 
    conf.setMaxConnections (CONF_MAX_CONNECTIONS); 
    // Set the timeout Socket layer to transmit data, the default is 50,000 milliseconds. 
    conf.setSocketTimeout (CONF_SOCKET_TIMEOUT); 
    // set the timeout establishing connection, the default is 50,000 milliseconds. 
    conf.setConnectionTimeout (CONF_CONNECTION_TIMEOUT); 
    // Get Connection Time set from the connection pool (Unit: ms), no default timeout. 
    conf.setConnectionRequestTimeout (CONF_CONNECTION_REQUEST_TIMEOUT); 
    // set the idle timeout. Expires, the connection is closed, the default is 60,000 milliseconds. 
    conf.setIdleConnectionTime (CONF_IDLE_CONNECTION_TIME);
    // Set the request retries fail, the default is 3 times. 
    conf.setMaxErrorRetry (CONF_MAX_ERROR_RETRY); 
    // set supports custom domain name as Endpoint, supported by default. 
    conf.setSupportCname (to true); 
    // enable or disable access method secondary domain name, the default is not open. 
    conf.setSLDEnabled (to false); 
    // set the protocol (HTTP / HTTPS) connection OSS is used, the default is HTTP. 
    conf.setProtocol (Protocol.HTTP); 

    return the conf; 
}

initialization:

/** OSSClient实例 */
private static volatile OSS ossClient;

/** 双重锁单例 */
private static OSS getOssClient() {
    if (ossClient == null) {
        synchronized (OSS.class) {
            if (ossClient == null) {
                ClientBuilderConfiguration conf = initConf();
                ossClient = new OSSClientBuilder().build(OSS_ENDPOINT, OSS_ACCESS_KEY_ID, OSS_ACCESS_KEY_SECRET, conf);
 　　　　　　　　　//程序退出关闭ossClient
                Runtime.getRuntime().addShutdownHook(new Thread(() -> ossClient.shutdown()));

            } 
        } 
    } 
    Return ossClient; 
} 


Upload:

// upload files 
ossClient.putObject (OSS_BUCKET_NAME, objectName, the INPUT, objectMetadata); 
// get the upload url 
return getImgUrl (OSS_ENDPOINT, OSS_BUCKET_NAME, objectName);

private static final String PRE_URL = "https://";
private static final String FILE_SEPARATOR = "/";
private static final String NAME_SEPARATOR = "_";
private static final String FILE_POINT = ".";

public static String getImgUrl(String endpoint, String bucketName, String objectName) {
    StringBuffer sb = new StringBuffer();
    sb.append(PRE_URL);
    sb.append(bucketName);
    sb.append(endpoint.replace(PRE_URL, FILE_POINT));
    sb.append(FILE_SEPARATOR);
    sb.append(objectName);
    return sb.toString();
}

If you encounter in the course of uploaded: 
<Error> 
<Code> SecondLevelDomainForbidden </ Code> 
<the Message> at The bucket you are Attempting to Access the MUST BE THIRD, Addressed a using OSS Level Domain </ the Message>. 
<RequestId> 5D8340FA530E23C38F6FB369 </ RequestId > 
<HostId> oss-cn-beijing.aliyuncs.com </ HostId> 
</ Error> 

online approach is: the endpoint is set to bucket + domain name fashion http: //bucket-name.oss-cn-hangzhou.aliyuncs .com / object

 But there will be a new problem:

<Error>
<Code>SignatureDoesNotMatch</Code>
<Message>The request signature we calculated does not match the signature you provided. Check your key and signing method.</Message>
<RequestId>5D8341C13EF51E45DBC0B383</RequestId>
<HostId>mgtv-cms-img.oss-cn-beijing.aliyuncs.com</HostId>
<OSSAccessKeyId>LTAI4FifYXAfMeWmiwpXWiKv</OSSAccessKeyId>
<SignatureProvided>QMy+ho20jDfI2KrEBaYAiBlC5aA=</SignatureProvided>

Solution: The following configurations can be set to false

// enable or disable access method secondary domain name, the default is not open. 
conf.setSLDEnabled (false);