OSS对象存储学习——JAVA篇

来源：互联网发布：mac 备份系统编辑：程序博客网时间：2024/06/07 22:35

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

import com.aliyun.oss.ClientConfiguration;
import com.aliyun.oss.HttpMethod;
import com.aliyun.oss.OSSClient;
import com.aliyun.oss.model.GeneratePresignedUrlRequest;
import com.aliyun.oss.model.OSSObjectSummary;
import com.aliyun.oss.model.ObjectListing;
import com.aliyun.oss.model.ObjectMetadata;

import com.aliyun.oss.model.PutObjectResult;

/**
* OSS方法测试类
* @author ZD
*
*/

public class OssTest {

//创建OSS客户端
private static OSSClient client;

//设置连接

private static String bucket_name = " your bucketName ";

private static String endpoint = " you endpoint ";

private static String accessKeyId = " you accessKeyId ";

private static String accessKeySecret = " you accessKeySecret ";

/**
* 配置Conf连接属性

* @return conf
*/

public ClientConfiguration conf() {
// 创建ClientConfiguration实例
ClientConfiguration conf = new ClientConfiguration();

// 设置OSSClient使用的最大连接数，默认1024
conf.setMaxConnections(200);

// 设置请求超时时间，默认50秒
conf.setSocketTimeout(10000);

// 设置失败请求重试次数，默认3次
conf.setMaxErrorRetry(3);

return conf;

}

/**
* 开启OSS
* @return boolean
*/
public boolean open() {
if(client == null) {
client = new OSSClient(endpoint, accessKeyId, accessKeySecret, conf());
}
return true;
}

/**
* 关闭OSS
* @return boolean
*/
public boolean close() {
if (client != null) {
client.shutdown();
}
return true;
}

/**
* 列出当前Bucket下的所有文件
*/
public void listObjects() {
ObjectListing objectListing = client.listObjects(bucket_name);
for (OSSObjectSummary objectSummary : objectListing.getObjectSummaries()) {
System.out.println(" - " + objectSummary.getKey() + " " + "(size = " + objectSummary.getSize() + ")");
}
}

/**
* 生成URL
*/
public void makeUrl() {

try {
GeneratePresignedUrlRequest request = new GeneratePresignedUrlRequest(bucket_name,"UAT/upload_test_001.xml",
HttpMethod.GET);

// 设置URL过期时间为1小时

Date expiration = new Date(new Date().getTime() + 3600 * 1000);
request.setExpiration(expiration);

// 生成URL签名(HTTP GET请求)
URL signedUrl = client.generatePresignedUrl(request);
System.out.println("signed url for getObject: " + signedUrl);

} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

}

/**
* 上传文件
*/
public void upload(){

try {

// 创建上传Object的Metadata
ObjectMetadata meta = new ObjectMetadata();
meta.setContentType("application/octet-stream");

//上传本地文件
PutObjectResult rs = client.putObject(bucket_name, "UAT/upload_test_001.xml", new File("D:/test.xml"),meta);

System.out.println("上传成功");

} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
System.out.println("上传失败");
}

}

/**
* 上传文件流
*/
public void OssUpload(InputStream inputStream,String fileName){
try {
// 创建上传Object的Metadata
ObjectMetadata meta = new ObjectMetadata();
meta.setContentType("application/octet-stream");
client.putObject(bucket_name,fileName,inputStream,meta);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

/**
* 下载文件到本地
*/
public void download(){
try{
client.getObject(new GetObjectRequest(bucket_name, "UAT/upload_test_001.xml"), new File("D:/upload_test_001.xml"));
System.out.println("下载成功");
}catch(Exception e) {
e.printStackTrace();
System.out.println("下载失败");
}
}

/**
* 流式下载
*/
public InputStream ossDownload(){

OSSObject ossObject = client.getObject(bucket_name, "UAT/upload_test_001.xml");
InputStream is = new DataInputStream(ossObject.getObjectContent());

return is;
}

/**
* Oss删除
* @param name
*/
public void delete(String name) {
client.deleteObject(bucket_name, name);
}

}

更多OSS对象存储学习，请参考阿里云对象存储OSS_SDK文档

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