Java：socket编程

目录

1、主程序

2、socket任务类

3、jdbc任务类

4、tomcat-jdbc连接池

5、jar包依赖

---

1、主程序

 创建2个线程池，一个用于管理socket连接，一个用来管理jdbc连接。

package socket;import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.ThreadPoolExecutor;/*** 使用长连接2001端口（新项目20231228）* @author Administrator**/
public class M3_2 {public static void main(String[] args) {try(ServerSocket s = new ServerSocket(2001)){ExecutorService pool = Executors.newFixedThreadPool(4);ExecutorService pool2 = Executors.newFixedThreadPool(4);while(true) {Socket socket = s.accept();pool.execute(new Task(socket,pool2));ThreadPoolExecutor t = (ThreadPoolExecutor)pool;}} catch (IOException e) {e.printStackTrace();}}}

2、socket任务类

创建JDBC的任务，异步地做数据入库的动作。

package socket;import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.Socket;
import java.util.Scanner;
import java.util.concurrent.ExecutorService;public class Task implements Runnable {private Socket socket;private ExecutorService pool2;public Task(Socket socket, ExecutorService pool2) {super();this.socket = socket;this.pool2 = pool2;}@Overridepublic void run() {try (InputStream inputStream = this.socket.getInputStream();Scanner scanner = new Scanner(inputStream);OutputStream out = socket.getOutputStream();PrintWriter pw = new PrintWriter(out);){boolean done = false;while(!done && scanner.hasNextLine()) {String line = scanner.nextLine();if(line.trim().equals("exit")) {done = true;pw.write("End");pw.flush();continue;}// 放入线程池，进行数据入库。pool2.execute(new JdbcTask(line));pw.write("e");pw.flush();}socket.close();} catch (IOException e) {e.printStackTrace();}}}

3、jdbc任务类

package socket;import java.sql.Connection;
import java.sql.PreparedStatement;public class JdbcTask implements Runnable {private String line;public JdbcTask(String line) {super();this.line = line;}@Overridepublic void run() {try (Connection connection = JdbcPool.getConnection();){// TODO line 入库// 业务逻辑SSSString sql2 = "insert into plc_first(ser_no,gong_xu_hao,niu_ju,jiao_du,ok_ng,gong_ju_hao,da_yin_ma,create_time)"+ "values (?,?,?,?,?,?,?,now())";PreparedStatement statement2 = connection.prepareStatement(sql2);String[] split = line.split("\\|");statement2.setString(1, split[0]);statement2.setString(2, split[3]);statement2.setString(3, split[4]);statement2.setString(4, split[5]);statement2.setString(5, split[6]);statement2.setString(6, split[7]);statement2.setString(7, split[8]);statement2.execute();statement2.close();// 业务逻辑EEEconnection.close();} catch (Exception e) {e.printStackTrace();}}}

4、tomcat-jdbc连接池

package socket;import java.sql.Connection;
import java.sql.SQLException;import org.apache.tomcat.jdbc.pool.DataSource;
/*** jdbc工具类* @author Administrator**/
public class JdbcPool {private static volatile DataSource dataSource;/*** 懒汉式（双重检查）* @return* @throws SQLException*/public static Connection getConnection() throws SQLException {if(dataSource == null) {synchronized (DataSource.class) {if(dataSource == null) {dataSource = new DataSource();dataSource.setUrl("jdbc:mysql://127.0.0.1:3306/plc?characterEncoding=UTF8");dataSource.setUsername("root");dataSource.setPassword("111111");dataSource.setDriverClassName("com.mysql.cj.jdbc.Driver");}}}return dataSource.getConnection();}}

5、jar包依赖