java读取oss文件并替换

以下是Java读取OSS文件并替换的示例代码：

import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClientBuilder;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;

public class OSSFileReader {

    private static final String endpoint = "oss-cn-hangzhou.aliyuncs.com";
    private static final String accessKeyId = "yourAccessKeyId";
    private static final String accessKeySecret = "yourAccessKeySecret";
    private static final String bucketName = "yourBucketName";
    private static final String objectName = "yourObjectName";

    public static void main(String[] args) throws IOException {
        OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);

        InputStream inputStream = ossClient.getObject(bucketName, objectName).getObjectContent();
        BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));

        // 读取文件内容并存储到List中
        List<String> contentList = new ArrayList<>();
        String line;
        while ((line = reader.readLine()) != null) {
            contentList.add(line);
        }

        // 替换文件内容
        for (int i = 0; i < contentList.size(); i++) {
            String content = contentList.get(i);
            if (content.contains("oldValue")) {
                contentList.set(i, content.replace("oldValue", "newValue"));
            }
        }

        // 上传更新后的文件
        StringBuilder stringBuilder = new StringBuilder();
        for (String content : contentList) {
            stringBuilder.append(content).append("\n");
        }
        ossClient.putObject(bucketName, objectName, stringBuilder.toString().getBytes());

        ossClient.shutdown();
    }
}

该代码使用阿里云Java SDK访问OSS服务，首先读取指定的文件内容并存储到List中，然后遍历List，将需要替换的内容进行替换，最后将更新后的内容上传到OSS。注意，这里只是简单的示例代码，实际应用中可能需要根据实际情况进行优化和改进。