运行环境：windows10笔记本、win10台式、TCP&UDP调试助手、IDEA。
实现描述：- 需求：通过UDP发送数据后，持续地进行TCP协议格式的数据接收。
- 问题：不知道怎么保持UDP发送数据后，等到TCP收到数据再停止发送广播包。
- 解决思路：通过两个线程？但是并未很好的解决。
一、Windows环境下传感器设备数据收发的简单环境测试。
1、UDP发送数据。package com.record.medicalterminal;
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
public class UDPServer {
public static void main(String[] args) throws IOException {
// 创建发送端Socket对象
DatagramSocket ds = new DatagramSocket();
// 创建一个数据包(发送容器)
String dataSendCommand = "3001092000830000ffff000000000000";
byte[] bys = dataSendCommand.getBytes();
int length = bys.length;
int port = 10086;
String ipAddress = "127.0.0.1";
// String ipAddress = "192.168.50.125";
// String ipAddress = "255.255.255.255";
InetAddress address = InetAddress.getByName(ipAddress);
DatagramPacket dp = new DatagramPacket(bys, length, address, port);
// 调用Socket对象的发送方法接收数据
int i = 5;
while(i-- > 0){
ds.send(dp);
System.out.println("UDPserver向" + address + "发送了：" + new String(bys));
}
// 释放资源
ds.close();
}
}
2、UDP接收数据
package com.record.medicalterminal;
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
public class UDPClient {
public static void main(String[] args) throws IOException {
// 创建接收端Socket对象
DatagramSocket ds = new DatagramSocket(10086);
// 创建一个数据包(接收容器)
byte[] bys = new byte[1024];
int length = bys.length;
DatagramPacket dp = new DatagramPacket(bys, length);
// 调用Socket对象的接收方法接收数据
// int i = 1;
while(true){
ds.receive(dp); // 阻塞方法
System.out.println(dp.getAddress().getHostAddress());
}
}
}
3、TCP接收数据
package com.record.medicalterminal;
import java.io.IOException;
import java.io.InputStream;
import java.net.ServerSocket;
import java.net.Socket;
public class TCPServer {
public static void main(String[] args) throws IOException {
// 创建接收端的套接字对象
ServerSocket ss = new ServerSocket(8888);
// 监听客户端连接，返回相应的Socket对象
Socket s = ss.accept();
// 获取输入流对象，从输入流中获取数据
InputStream is = s.getInputStream();
byte[] bys = new byte[1024];
int len = is.read(bys);
String str = new String(bys, 0, len);
System.out.println("From Client" + "(" + s.getInetAddress().getHostAddress() + "):" + str);
// 释放资源
s.close();
}
}
4、TCP发送请求数据
package com.record.medicalterminal;
import java.io.IOException;
import java.io.OutputStream;
import java.net.Socket;
import java.util.Scanner;
public class TCPClient {
public static void main(String[] args) throws IOException {
// String ipAddress = "127.0.0.1";
String ipAddress = "192.168.50.125";
// 创建Socket套接字对象
Socket s = new Socket(ipAddress, 8888);
// 获取输出流对象,写数据
OutputStream os = s.getOutputStream();
String outData = "hello,世界";
os.write(outData.getBytes());
System.out.println("send " + outData + " to " + ipAddress + " success!");
Scanner sc = new Scanner(System.in);
while (true){
os.write(sc.nextLine().getBytes());
if(sc.nextLine().equals("q")){
break;
}
sc.nextLine();
}
// 释放资源
s.close();
}
}
5、线程发1送UDP数据，线程2接收TCP数据
package com.record.medicalterminal;
import java.io.IOException;
import java.io.InputStream;
import java.net.*;
public class UDPServerTCPClient {
public static void main(String[] args) throws IOException {
RunnableDemo R1 = new RunnableDemo( "Thread-1");
R1.start();
RunnableDemoTCPServer R3 = new RunnableDemoTCPServer("Thread-3");
R3.start();
}
}
class RunnableDemo implements Runnable {
private Thread t;
private String threadName;
RunnableDemo( String name) {
threadName = name;
System.out.println("Creating " + threadName );
}
public void run() {
System.out.println("Running " + threadName );
try {
for(int i = 4; i > 0; i--) {
System.out.println("Thread: " + threadName + ", " + i);
// 让线程睡眠一会
Thread.sleep(50);
}
//下面是自己编写的UDP发送数据的程序
// 创建发送端Socket对象
DatagramSocket ds = new DatagramSocket();
// 创建一个数据包(发送容器)
String dataSendCommand = "3001092000830000ffff000000000000";
byte[] bys = dataSendCommand.getBytes();
int length = bys.length;
int port = 10086;
// String ipAddress = "127.0.0.1";
String ipAddress = "192.168.50.125";
// String ipAddress = "255.255.255.255";
InetAddress address = InetAddress.getByName(ipAddress);
DatagramPacket dp = new DatagramPacket(bys, length, address, port);
// 调用Socket对象的发送方法接收数据
int i = 5;
while(i-- > 0){
ds.send(dp);
System.out.println("UDPserver向" + address + "发送了：" + new String(bys));
}
// 释放资源
ds.close();
}catch (InterruptedException e) {
System.out.println("Thread " + threadName + " interrupted.");
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (SocketException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
System.out.println("Thread " + threadName + " exiting.");
}
public void start () {
System.out.println("Starting " + threadName );
if (t == null) {
t = new Thread (this, threadName);
t.start ();
}
}
}
class RunnableDemoTCPServer implements Runnable {
private Thread t;
private String threadName;
RunnableDemoTCPServer( String name) {
threadName = name;
System.out.println("Creating " + threadName );
}
public void run() {
System.out.println("Running " + threadName );
try {
for(int i = 4; i > 0; i--) {
System.out.println("Thread: " + threadName + ", " + i);
// 让线程睡眠一会
Thread.sleep(50);
}
// 创建接收端的套接字对象
ServerSocket ss = new ServerSocket(8888);
// 监听客户端连接，返回相应的Socket对象
Socket s = ss.accept();
// 获取输入流对象，从输入流中获取数据
while (true){
InputStream is = s.getInputStream();
byte[] bys = new byte[1024];
int len = is.read(bys);
String str = new String(bys, 0, len);
System.out.println("From Client" + "(" + s.getInetAddress().getHostAddress() + "):" + str);
if(str.equals("q")){
break;
}
}
// 释放资源
s.close();
}catch (InterruptedException e) {
System.out.println("Thread " + threadName + " interrupted.");
} catch (IOException e) {
e.printStackTrace();
}
System.out.println("Thread " + threadName + " exiting.");
}
public void start () {
System.out.println("Starting " + threadName );
if (t == null) {
t = new Thread (this, threadName);
t.start ();
}
}
}
6、成功实现两线程wait/notify 简单通信
package com.record.medicalterminal;
import java.util.ArrayList;
import java.util.List;
public class ThreadLockDemo1 {
public static void main(String[] args) {
try {
Object lock = new Object();
ThreadA a = new ThreadA(lock);
a.start();
Thread.sleep(50);
ThreadB b = new ThreadB(lock);
b.start();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
class MyList {
private static List list = new ArrayList();
public static void add() {
list.add("anyString");
}
public static int size() {
return list.size();
}
}
class ThreadA extends Thread {
private Object lock;
public ThreadA(Object lock) {
super();
this.lock = lock;
}
@Override
public void run() {
try {
synchronized (lock) {
if (MyList.size() != 5) {
System.out.println("wait begin "
+ System.currentTimeMillis());
lock.wait();
System.out.println("wait end "
+ System.currentTimeMillis());
}
}
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
class ThreadB extends Thread {
private Object lock;
public ThreadB(Object lock) {
super();
this.lock = lock;
}
@Override
public void run() {
try {
synchronized (lock) {
for (int i = 0; i < 10; i++) {
MyList.add();
if (MyList.size() == 5) {
lock.notify();
System.out.println("已经发出了通知");
}
System.out.println("添加了" + (i + 1) + "个元素!");
Thread.sleep(1000);
}
}
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
7、TCP接收数据，通过notify唤醒UDP
package com.record.medicalterminal;
import java.io.IOException;
import java.io.InputStream;
import java.net.*;
import java.util.ArrayList;
import java.util.List;
public class ThreadLockDemo1 {
public static void main(String[] args) {
try {
Object lock = new Object();
ThreadA a = new ThreadA(lock);
a.start();
Thread.sleep(50);
ThreadB b = new ThreadB(lock);
b.start();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
class MyList {
private static List list = new ArrayList();
public static void add() {
list.add("anyString");
}
public static int size() {
return list.size();
}
}
class ThreadA extends Thread {
private Object lock;
public ThreadA(Object lock) {
super();
this.lock = lock;
}
@Override
public void run() {
try {
synchronized (lock) {
if (MyList.size() != 5) {
System.out.println("wait begin "
+ System.currentTimeMillis());
// 创建发送端Socket对象
DatagramSocket ds = new DatagramSocket();
// 创建一个数据包(发送容器)
String dataSendCommand = "3001092000830000ffff000000000000";
byte[] bys = dataSendCommand.getBytes();
int length = bys.length;
int port = 10086;
// String ipAddress = "127.0.0.1";
// String ipAddress = "192.168.50.125";
String ipAddress = "255.255.255.255";
InetAddress address = InetAddress.getByName(ipAddress);
DatagramPacket dp = new DatagramPacket(bys, length, address, port);
// 调用Socket对象的发送方法接收数据
int i = 10, k = 0;
while(i -- > 0){
ds.send(dp);
System.out.println("UDPserver向" + address + "发送 " + new String(bys) + " " + (k++) + " 次");
Thread.sleep(1000);
}
lock.wait();
System.out.println("wait end "
+ System.currentTimeMillis());
// 释放资源
ds.close();
}
}
} catch (InterruptedException e) {
e.printStackTrace();
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (SocketException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
class ThreadB extends Thread {
private Object lock;
public ThreadB(Object lock) {
super();
this.lock = lock;
}
@Override
public void run() {
try {
synchronized (lock) {
// 创建接收端的套接字对象
ServerSocket ss = new ServerSocket(8888);
// 监听客户端连接，返回相应的Socket对象
Socket s = ss.accept();
// 获取输入流对象，从输入流中获取数据
int i = 0;
while (true){
InputStream is = s.getInputStream();
byte[] bys = new byte[1024];
int len = is.read(bys);
if(len != 0 && ++i == 1){
lock.notify();
}
String str = new String(bys, 0, len);
System.out.println("From Client" + "(" + s.getInetAddress().getHostAddress() + ") " + "i=" + i + " :" + str);
if(str.equals("q")){
break;
}
}
System.out.println("已经发出了通知");
// 释放资源
s.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
