tcp请求 客户端

import lombok.extern.slf4j.Slf4j;

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.Socket;
import java.nio.charset.StandardCharsets;

@Slf4j
public class TcpClientUtils {

   /**
    * 发送tcp请求
    * @param str
    * @param host
    * @param port
    * @return
    */
   public static String send(String str, String host, int port) {
      log.info("请求地址：[{}]，请求端口：[{}]，请求报文：[{}]", host, port, str);
      try (Socket socket = new Socket(host, port);
           DataOutputStream dops = new DataOutputStream(socket.getOutputStream());
           BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream()))) {
         StringBuilder sb = new StringBuilder();
         dops.write(str.getBytes(StandardCharsets.UTF_8));
         String info;
         while ((info = br.readLine()) != null) {
            sb.append(info);
         }
         String result = sb.toString();
         log.info("返回信息：[{}]", result);
         return result;
      } catch (IOException e) {
         log.error(e.getMessage(), e);
         return null;
      }
   }
}