在Inputstream中获取STX和ETX之间的字符串/字节

import java.io.InputStream;
import java.io.IOException;

public class InputStreamExample {
    public static void main(String[] args) {
        InputStream inputStream = null;
        try {
            // 获取Inputstream对象，此处省略获取过程

            // 创建缓冲区
            byte[] buffer = new byte[1024];
            int bytesRead;

            // 读取数据直到遇到STX
            while ((bytesRead = inputStream.read(buffer)) != -1) {
                for (int i = 0; i < bytesRead; i++) {
                    if (buffer[i] == STX) {
                        // 继续读取数据直到遇到ETX
                        StringBuilder stringBuilder = new StringBuilder();
                        while ((bytesRead = inputStream.read(buffer)) != -1) {
                            for (int j = 0; j < bytesRead; j++) {
                                if (buffer[j] == ETX) {
                                    // 获取STX和ETX之间的内容
                                    String content = stringBuilder.toString();
                                    // 处理获取到的内容
                                    System.out.println("获取到的内容：" + content);
                                    return;
                                } else {
                                    stringBuilder.append((char) buffer[j]);
                                }
                            }
                        }
                    }
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (inputStream != null) {
                try {
                    inputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}