前言

初学OSS，白嫖了三个月，分享一下学习心得！

一、OSS是什么？

下面以一个小故事介绍OSS的作用：

从前，有一个小村庄，这个小村庄的人们生活朴素，但是却非常团结。他们的主要收入来源是从周边山林中收集各种野果和草药，然后卖给城市里的商贩。 有一天，村庄里的年轻人听说了互联网和电子商务，他们想利用这个机会来将自己的野果和草药推销到全国各地。然而，他们发现自己没有能力和资源来开发和维护自己的在线商店。
幸运的是，他们听说了阿里云的对象存储（OSS）服务，这个服务可以为他们提供可靠的存储和访问服务，同时还可以自动扩展存储容量，以满足他们日益增长的业务需求。
于是，他们决定使用OSS服务来构建自己的在线商店。他们将自己的产品照片和介绍上传到OSS中，并使用OSS的API来构建自己的网站，然后使用阿里云的负载均衡服务来管理流量，确保他们的网站可以快速响应用户请求。
通过OSS和阿里云的帮助，这个小村庄的年轻人成功地将自己的野果和草药卖到了全国各地，他们的生意日益繁荣。最终，他们甚至能够扩大自己的生产规模，为更多人提供优质的野果和草药，也让更多的人了解和认识这个美丽的小村庄。
故事的结局告诉我们，OSS的作用是提供可靠的存储和访问服务。

二、怎么使用OSS

1.进入 -----> 阿里云官网

2.点击进入OSS控制台

默认你已经买了，就可以直接进入控制台了：

3.获取accessKeyId 和 accessKeySecret

关于在OSS控制太的可视化操作这里就不说了，下面是关于怎么使用java代码对oss进行操作

创建Bucket 然后点击你的Bucket列表（桶）或者 在搜索栏搜索RAM 访问控制 进入RAM 控制台，获取accessKeyId 和 accessKeySecret

点击AccessKey：




这样就可以拿到accessKeyId 和 accessKeySecret了

4.拿到了accessKeyId 和 accessKeySecret ，就可以直接上代码操作了

下面列举几个简单的示例：

打开idea，在pom.xml导入依赖

<dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency><dependency><groupId>com.aliyun.oss</groupId><artifactId>aliyun-sdk-oss</artifactId><version>3.15.1</version>
</dependency>

新建Demo类：

4.1.新建桶代码

import com.aliyun.oss.ClientException;
import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.OSSException;
import com.aliyun.oss.model.OSSObject;
import com.aliyun.oss.model.OSSObjectSummary;
import com.aliyun.oss.model.ObjectListing;import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.InputStreamReader;public class Demo {// 新建桶public static void main(String[] args) throws Exception {// Endpoint以华东1（杭州）为例，其它Region请按实际情况填写。String endpoint = "https://oss-cn-hangzhou.aliyuncs.com";// 阿里云账号AccessKey拥有所有API的访问权限，风险很高。强烈建议您创建并使用RAM用户进行API访问或日常运维，请登录RAM控制台创建RAM用户。String accessKeyId = "你的accessKeyId ";String accessKeySecret = "你的accessKeySecret ";// 填写Bucket名称，例如jljlm。String bucketName = "jljlm";// 创建OSSClient实例。OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);try {// 创建存储空间。ossClient.createBucket(bucketName);} catch (OSSException oe) {System.out.println("Caught an OSSException, which means your request made it to OSS, "+ "but was rejected with an error response for some reason.");System.out.println("Error Message:" + oe.getErrorMessage());System.out.println("Error Code:" + oe.getErrorCode());System.out.println("Request ID:" + oe.getRequestId());System.out.println("Host ID:" + oe.getHostId());} catch (ClientException ce) {System.out.println("Caught an ClientException, which means the client encountered "+ "a serious internal problem while trying to communicate with OSS, "+ "such as not being able to access the network.");System.out.println("Error Message:" + ce.getMessage());} finally {if (ossClient != null) {ossClient.shutdown();}}}
}

运行后刷新oss控制台，结果如下：

成功！！！

4.2.写入txt文件并上传到oss代码

// 通过流式上传的方式将文件上传到OSS。public static void main(String[] args) throws Exception {// Endpoint以华东1（杭州）为例，其它Region请按实际情况填写。String endpoint = "https://oss-cn-hangzhou.aliyuncs.com";// 阿里云账号AccessKey拥有所有API的访问权限，风险很高。强烈建议您创建并使用RAM用户进行API访问或日常运维，请登录RAM控制台创建RAM用户。String accessKeyId = "你的accessKeyId ";String accessKeySecret = "你的accessKeySecret ";// 填写Bucket名称，例如jljlm。String bucketName = "jljlm";// 填写Object完整路径，例如txt文件/hello.txt。Object完整路径中不能包含Bucket名称。// 这是oss上的路径String objectName = "txt文件/hello.txt";// 创建OSSClient实例。OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);try {// 文件内容String content = "Hello OSS";ossClient.putObject(bucketName, objectName, new ByteArrayInputStream(content.getBytes()));} catch (OSSException oe) {System.out.println("Caught an OSSException, which means your request made it to OSS, "+ "but was rejected with an error response for some reason.");System.out.println("Error Message:" + oe.getErrorMessage());System.out.println("Error Code:" + oe.getErrorCode());System.out.println("Request ID:" + oe.getRequestId());System.out.println("Host ID:" + oe.getHostId());} catch (ClientException ce) {System.out.println("Caught an ClientException, which means the client encountered "+ "a serious internal problem while trying to communicate with OSS, "+ "such as not being able to access the network.");System.out.println("Error Message:" + ce.getMessage());} finally {if (ossClient != null) {ossClient.shutdown();}}}

运行后刷新oss控制台，结果如下：

成功！！！

4.3.文件下载读取输出到控制台代码

// 通过流式下载方式从OSS下载读取文件。
public static void main(String[] args) throws Exception {// Endpoint以华东1（杭州）为例，其它Region请按实际情况填写。String endpoint = "https://oss-cn-hangzhou.aliyuncs.com";// 阿里云账号AccessKey拥有所有API的访问权限，风险很高。强烈建议您创建并使用RAM用户进行API访问或日常运维，请登录RAM控制台创建RAM用户。String accessKeyId = "你的accessKeyId ";String accessKeySecret = "你的accessKeySecret ";// 填写Bucket名称，例如jljlm。String bucketName = "jljlm";// 填写Object完整路径，例如txt文件/hello.txt。Object完整路径中不能包含Bucket名称。String objectName = "txt文件/hello.txt";// 创建OSSClient实例。OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);try {// 调用ossClient.getObject返回一个OSSObject实例，该实例包含文件内容及文件元信息。OSSObject ossObject = ossClient.getObject(bucketName, objectName);// 调用ossObject.getObjectContent获取文件输入流，可读取此输入流获取其内容。InputStream content = ossObject.getObjectContent();if (content != null) {BufferedReader reader = new BufferedReader(new InputStreamReader(content));while (true) {String line = reader.readLine();if (line == null) break;System.out.println("\\n" + line);}// 数据读取完成后，获取的流必须关闭，否则会造成连接泄漏，导致请求无连接可用，程序无法正常工作。content.close();}} catch (OSSException oe) {System.out.println("Caught an OSSException, which means your request made it to OSS, "+ "but was rejected with an error response for some reason.");System.out.println("Error Message:" + oe.getErrorMessage());System.out.println("Error Code:" + oe.getErrorCode());System.out.println("Request ID:" + oe.getRequestId());System.out.println("Host ID:" + oe.getHostId());} catch (ClientException ce) {System.out.println("Caught an ClientException, which means the client encountered "+ "a serious internal problem while trying to communicate with OSS, "+ "such as not being able to access the network.");System.out.println("Error Message:" + ce.getMessage());} finally {if (ossClient != null) {ossClient.shutdown();}}}

读取结果输出控制台

成功！！！

4.4.列举文件

    // 列举文件：默认列举100个文件。public static void main(String[] args) throws Exception {// Endpoint以华东1（杭州）为例，其它Region请按实际情况填写。String endpoint = "https://oss-cn-hangzhou.aliyuncs.com";String accessKeyId = "你的accessKeyId ";String accessKeySecret = "你的accessKeySecret ";// 填写Bucket名称，例如jljlm。String bucketName = "jljlm";// 创建OSSClient实例。OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);try {// ossClient.listObjects返回ObjectListing实例，包含此次listObject请求的返回结果。ObjectListing objectListing = ossClient.listObjects(bucketName);// objectListing.getObjectSummaries获取所有文件的描述信息。for (OSSObjectSummary objectSummary : objectListing.getObjectSummaries()) {System.out.println(" - " + objectSummary.getKey() + "  " +"(size = " + objectSummary.getSize() + ")");}} catch (OSSException oe) {System.out.println("Caught an OSSException, which means your request made it to OSS, "+ "but was rejected with an error response for some reason.");System.out.println("Error Message:" + oe.getErrorMessage());System.out.println("Error Code:" + oe.getErrorCode());System.out.println("Request ID:" + oe.getRequestId());System.out.println("Host ID:" + oe.getHostId());} catch (ClientException ce) {System.out.println("Caught an ClientException, which means the client encountered "+ "a serious internal problem while trying to communicate with OSS, "+ "such as not being able to access the network.");System.out.println("Error Message:" + ce.getMessage());} finally {if (ossClient != null) {ossClient.shutdown();}}}

读取结果输出控制台：

成功！！！

4.5.删除指定文件

// 删除指定文件public static void main(String[] args) throws Exception {// Endpoint以华东1（杭州）为例，其它Region请按实际情况填写。String endpoint = "https://oss-cn-hangzhou.aliyuncs.com";// 阿里云账号AccessKey拥有所有API的访问权限，风险很高。强烈建议您创建并使用RAM用户进行API访问或日常运维，请登录RAM控制台创建RAM用户。String accessKeyId = "你的accessKeyId ";String accessKeySecret = "你的accessKeySecret ";// 填写Bucket名称，例如examplebucket。String bucketName = "jljlm";// 填写Object完整路径，例如txt文件/hello.txt。Object完整路径中不能包含Bucket名称。// 这是oss上的路径String objectName = "txt文件/hello.txt";// 创建OSSClient实例。OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);try {// 删除文件。ossClient.deleteObject(bucketName, objectName);} catch (OSSException oe) {System.out.println("Caught an OSSException, which means your request made it to OSS, "+ "but was rejected with an error response for some reason.");System.out.println("Error Message:" + oe.getErrorMessage());System.out.println("Error Code:" + oe.getErrorCode());System.out.println("Request ID:" + oe.getRequestId());System.out.println("Host ID:" + oe.getHostId());} catch (ClientException ce) {System.out.println("Caught an ClientException, which means the client encountered "+ "a serious internal problem while trying to communicate with OSS, "+ "such as not being able to access the network.");System.out.println("Error Message:" + ce.getMessage());} finally {if (ossClient != null) {ossClient.shutdown();}}}

运行后刷新OSS控制台：

成功！！！

三、总结

OSS提供可靠的存储和访问服务，OSS可用于图片、音视频、日志等海量文件的存储，方便的存储各种文件。

@作者：加辣椒了吗？
简介：憨批大学生一枚，喜欢在博客上记录自己的学习心得，也希望能够帮助到你们！