java判断tcp正常连接

可以使用Java的Socket类来判断TCP连接是否正常。具体方法如下：

1. 创建Socket对象并指定IP地址和端口号：

String ip = "192.168.0.1";
int port = 8080;
Socket socket = new Socket(ip, port);

2. 获取Socket的输入输出流：

InputStream inputStream = socket.getInputStream();
OutputStream outputStream = socket.getOutputStream();

3. 判断连接是否正常，可以通过往输出流中写入数据并读取输入流中的数据进行确认，例如：

String testMessage = "test message";
outputStream.write(testMessage.getBytes());
byte[] buffer = new byte[1024];
int len = inputStream.read(buffer);
String receivedMessage = new String(buffer, 0, len);
if (receivedMessage.equals(testMessage)) {
    System.out.println("TCP connection is normal.");
} else {
    System.out.println("TCP connection is abnormal.");
}

4. 关闭Socket连接：

socket.close();