java版socket NIO实现，包含客户端和服务端

package cn.com.ztesa.bank.config; import cn.com.ztesa.bank.entity.FgcNhMsgRecord; import cn.com.ztesa.bank.service.BankReceiveExeService; import cn.hutool.core.util.ObjectUtil; import com.jeesite.common.lang.StringUtils; import lombok.extern.slf4j.Slf4j; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Component; import java.io.IOException; import java.net.InetSocketAddress; import java.nio.ByteBuffer; import java.nio.channels.ServerSocketChannel; import java.nio.channels.SocketChannel; import java.nio.charset.StandardCharsets; @Component @Slf4j public class SocketNioServer { @Autowired private NhConfig nhConfig; @Autowired private BankReceiveExeService bankReceiveExeService; public void start(){ ServerSocketChannel serverSocket = null; try { serverSocket = ServerSocketChannel.open(); serverSocket.bind(new InetSocketAddress(nhConfig.getServerPort())); serverSocket.configureBlocking(false); log.info("Socket服务已启动，端口： {}", serverSocket .socket().getLocalPort()); }catch (IOException e){ log.error("端口异常信息",e); System.exit(0); } while (true) { try { SocketChannel client = serverSocket.accept(); if (client != null) { handleClient(client); } } catch (Exception e) { e.printStackTrace(); } } } private void handleClient(SocketChannel client) throws Exception{ ByteBuffer buffer = ByteBuffer.allocate(1024); int bytesRead = client.read(buffer); if (bytesRead > 0) { buffer.flip(); byte[] data = new byte[bytesRead]; buffer.get(data); //接收客户端数据 log.info("处理数据onMessage的开始时间================="); String xmlString = new String(data, StandardCharsets.UTF_8); log.info("接收xmlString================={}", xmlString); //处理逻辑：xmlStringToEsb为处理结果 log.info("解析数据execute的开始时间================="); try { FgcNhMsgRecord fgcNhMsgRecord = bankReceiveExeService.execute(xmlString.toString()); log.info("处理数据onMessage的结束时间================="); if (ObjectUtil.isNotNull(fgcNhMsgRecord)) { //返回给客户端 log.info("回复======start"); log.info("context======={}", fgcNhMsgRecord.getContext()); if (StringUtils.isNotBlank(fgcNhMsgRecord.getContext())) { String message = fgcNhMsgRecord.getContext(); this.sendMessage(client, message); } fgcNhMsgRecord.setState(FgcNhMsgRecord.SEND_SUCCESS); bankReceiveExeService.updateMsgRecord(fgcNhMsgRecord); log.info("回复======end"); } } catch (Exception e) { log.error("系统异常", e); } } client.close(); } private void sendMessage(SocketChannel socketChannel,String message){ try { ByteBuffer block = ByteBuffer.wrap(message.getBytes(StandardCharsets.UTF_8)); socketChannel.write(block); }catch (IOException e){ log.error("sendMessage异常", e); } } }