阿里云对象存储oss-文件上传过程详解(两种方式)

方式一(最新代码,时间:2023/8/27)

问题:需要配置系统变量才能够使用

(1)如何配置系统变量

以win11为例

• (1)打开设置
• (2)选择----系统信息
• (3)选择----高级系统设置
• (4)选择----环境变量
• (5)选择----系统变量这栏-----新建
• (6)在“变量名”输入框中输入 OSS_ACCESS_KEY_ID，在“变量值”输入框中输入你的Access Key ID。再次点击“新建”按钮，输入变量名为 OSS_ACCESS_KEY_SECRET，变量值为您的Access Key Secret。
  
• (7)点击“确定”保存设置。

(2)完整代码

代码复制下来基本不变,只需要更改对应位位置的值,改成自己的对象存储oss的相关信息.包括:

• endpoint 是用来指定阿里云 OSS 服务的访问域名或URL。

• 更改成自己的Bucket名称，例如web-3tlias。

• 填写Object完整路径，完整路径中不能包含Bucket名称，例如 String objectName = "1.txt";表示存在Bucket该目录下

• 填写本地文件的完整路径，例如D:C:\\Users\\ZJ\\Desktop\\1.txt。如果未指定本地路径，则默认从示例程序所属项目对应本地路径中上传文件流。sql String filePath= "C:\\Users\\ZJ\\Desktop\\1.txt";

import com.aliyun.oss.ClientException;
import com.aliyun.oss.OSS;
import com.aliyun.oss.common.auth.*;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.OSSException;
import com.aliyun.oss.model.PutObjectRequest;
import com.aliyun.oss.model.PutObjectResult;
import java.io.FileInputStream;
import java.io.InputStream;

public class Demo {

    public static void main(String[] args) throws Exception {
        // Endpoint以华北2（北京）为例，其它Region请按实际情况填写。
        String endpoint = "https://oss-cn-beijing.aliyuncs.com";
        // 从环境变量中获取访问凭证。运行本代码示例之前，请确保已设置环境变量OSS_ACCESS_KEY_ID和OSS_ACCESS_KEY_SECRET。
        EnvironmentVariableCredentialsProvider credentialsProvider = CredentialsProviderFactory.newEnvironmentVariableCredentialsProvider();
      
        // 填写Bucket名称，例如web-3tlias。
        String bucketName = "web-3tlias";
        // 填写Object完整路径，完整路径中不能包含Bucket名称，例如1.txt。
        String objectName = "1.txt";
        // 填写本地文件的完整路径，例如D:C:\\Users\\ZJ\\Desktop\\1.txt。
        // 如果未指定本地路径，则默认从示例程序所属项目对应本地路径中上传文件流。
        String filePath= "C:\\Users\\ZJ\\Desktop\\1.txt";

        // 创建OSSClient实例。
        OSS ossClient = new OSSClientBuilder().build(endpoint, credentialsProvider);

        try {
            InputStream inputStream = new FileInputStream(filePath);
            // 创建PutObjectRequest对象。
            PutObjectRequest putObjectRequest = new PutObjectRequest(bucketName, objectName, inputStream);
            // 创建PutObject请求。
            PutObjectResult result = ossClient.putObject(putObjectRequest);
        } 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();
            }
        }
    }
} 

方式二(跟黑马最新教程同代码)

(1)在复制下来的代码中

• 将那个自动获取的实例删除

EnvironmentVariableCredentialsProvider credentialsProvider = CredentialsProviderFactory.newEnvironmentVariableCredentialsProvider();

这个实例用于获取环境变量中的凭证信息。

• 然后重新加入

 String accessKeyId="/your accessKeyId";        
 String accessKeySecret="your accessKeySecret";

• 然后将

OSS ossClient = new OSSClientBuilder().build(endpoint, credentialsProvider);

这一句改成

OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId,accessKeySecret);

---

(2)完整代码

import com.aliyun.oss.ClientException;
import com.aliyun.oss.OSS;
import com.aliyun.oss.common.auth.*;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.OSSException;
import com.aliyun.oss.model.PutObjectRequest;
import com.aliyun.oss.model.PutObjectResult;
import java.io.FileInputStream;
import java.io.InputStream;

public class Demo {

    public static void main(String[] args) throws Exception {
        // Endpoint以华北2（北京）为例，其它Region请按实际情况填写。
        String endpoint = "https://oss-cn-beijing.aliyuncs.com";
        // 从环境变量中获取访问凭证。运行本代码示例之前，请确保已设置环境变量OSS_ACCESS_KEY_ID和OSS_ACCESS_KEY_SECRET。

        //EnvironmentVariableCredentialsProvider credentialsProvider = CredentialsProviderFactory.newEnvironmentVariableCredentialsProvider();

        String accessKeyId="LTAI5t7jEXfK1jYtY1rCPtc9";          //your accessKeyId

        String accessKeySecret="cQjd70rASM7mwmefIwm4DEbgRtph9s";//your accessKeySecret
        // 填写Bucket名称，例如web-3tlias。
        String bucketName = "web-3tlias";
        // 填写Object完整路径，完整路径中不能包含Bucket名称，例如1.txt。
        String objectName = "1.txt";
        // 填写本地文件的完整路径，例如D:C:\Users\ZJ\Desktop\1.txt。
        // 如果未指定本地路径，则默认从示例程序所属项目对应本地路径中上传文件流。
        String filePath= "C:\\Users\\ZJ\\Desktop\\1.txt";

        // 创建OSSClient实例。
        //OSS ossClient = new OSSClientBuilder().build(endpoint, credentialsProvider);
        OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId,accessKeySecret);
      

        try {
            InputStream inputStream = new FileInputStream(filePath);
            // 创建PutObjectRequest对象。
            PutObjectRequest putObjectRequest = new PutObjectRequest(bucketName, objectName, inputStream);
            // 创建PutObject请求。
            PutObjectResult result = ossClient.putObject(putObjectRequest);
        } 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();
            }
        }
    }
}