Java笔记第十一弹
TCP通信程序
TCP发送数据
//需要进行三次握手
import java.io.*;
public class Main{
public static void main(String[] args) throws IOException {
Socket s=new Socket(InetAddress.getByName("192.168.1.66"),10086);
//可以用下面这个代替上面那个
Socket ss=new Socket("192.168.1.66",10086);
//获取输出流
OutputStream os=ss.getOutputStream();
os.write("hello,tcp,我来啦！".getBytes());
//释放资源
ss.close();
s.close();
}
}
TCP接收数据
import java.io.*;
public class Main{
public static void main(String[] args) throws IOException {
ServerSocket ss=new ServerSocket(10086);
Socket s=ss.accept();
//获取输入流
InputStream is=s.getInputStream();
byte[] by=new byte[1024];
int len=is.read(by);
String data=new String(by,0,len);
System.out.println("数据是："+data);
//释放资源
ss.close();
}
}
案例1：服务器给出反馈
//发送数据
import java.io.*;
public class Main{
public static void main(String[] args) throws IOException {
Socket s=new Socket("192.168.1.66",10086);
OutputStream os=s.getOutputStream();
os.write("hello.tcp,我来啦！".getBytes());
InputStream is=s.getInputStream();
byte[] by=new byte[1024];
int len=is.read(by);
String data=new String(by,0,len);
System.out.println("数据是："+data);
s.close();
}
}
//接收数据
import java.net.*;
import java.io.*;
public class Main{
public static void main(String[] args) throws IOException {
ServerSocket ss=new ServerSocket(10086);
//监听客户端连接
Socket s=ss.accept();
InputStream is=s.getInputStream();
byte[] by=new byte[1024];
int len=is.read(by);
String data=new String(by,0,len);
System.out.println("服务器："+data);
//给出反馈
OutputStream os=s.getOutputStream();
os.write("数据已经收到！".getBytes());
//释放资源
s.close();
ss.close();
}
}
案例2：
//发送数据
import java.net.*;
import java.io.*;
public class Main{
public static void main(String[] args) throws IOException {
Socket s=new Socket("192.168.1.66",10086);
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
//封装输出流对象
BufferedWriter bw=new BufferedWriter(new OutputStreamWriter(s.getOutputStream()));
String line;
while((line=br.readLine())!=null){
if("886".equals(line)){
break;
}
//发送数据
/*OutputStream os=s.getOutputStream();
os.write(line.getBytes());*/
bw.write(line);
bw.newLine();
bw.flush();
}
//释放资源
s.close();
}
}
//接收数据
import java.net.*;
import java.io.*;
public class Main{
public static void main(String[] args) throws IOException {
ServerSocket ss=new ServerSocket();
//监听客户端的连接
Socket s=ss.accept();
//获取输入流
//InputStream is=s.getInputStream();
// InputStreamReader isr=new InputStreamReader(is);
// BufferedReader br=new BufferedReader(isr);
BufferedReader br=new BufferedReader(new InputStreamReader(s.getInputStream()));
String line;
while((line=br.readLine())!=null){
System.out.println(line);
}
ss.close();
}
}
案例3：
//发送数据
import java.net.*;
import java.io.*;
public class Main{
public static void main(String[] args) throws IOException {
Socket s=new Socket("192.168.1.66",10086);
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
//封装输出流对象
BufferedWriter bw=new BufferedWriter(new OutputStreamWriter(s.getOutputStream()));
String line;
while((line=br.readLine())!=null){
if("886".equals(line)){
break;
}
//发送数据
/*OutputStream os=s.getOutputStream();
os.write(line.getBytes());*/
bw.write(line);
bw.newLine();
bw.flush();
}
//释放资源
s.close();
}
}
//接收数据
import java.net.*;
import java.io.*;
public class Main{
public static void main(String[] args) throws IOException {
ServerSocket ss=new ServerSocket();
Socket s=ss.accept();
BufferedReader br=new BufferedReader(new InputStreamReader(s.getInputStream()));
//写入文本文件
BufferedWriter bw =new BufferedWriter(new FileWriter("myNet\\s/txt"));
String line;
while((line=br.readLine())!=null){
bw.write(line);
bw.newLine();
bw.flush();
}
ss.close();
}
}
案例4：
//客户端
import java.net.*;
import java.io.*;
public class Main{
public static void main(String[] args) throws IOException {
Socket s=new Socket("192.168.1.66",10086);
//封装文本文件的数据
BufferedReader br =new BufferedReader(new FileReader("myNet\\s.java"));
//封装输出流写数据
BufferedWriter bw =new BufferedWriter(new OutputStreamWriter(s.getOutputStream()));
String line;
while((line=br.readLine())!=null){
bw.write(line);
bw.newLine();
bw.flush();
}
br.close();
s.close();
}
}
//服务器
import java.net.*;
import java.io.*;
public class Main{
public static void main(String[] args) throws IOException {
ServerSocket ss=new ServerSocket();
Socket s=ss.accept();
BufferedReader br=new BufferedReader(new InputStreamReader(s.getInputStream()));
//写入文本文件
BufferedWriter bw =new BufferedWriter(new FileWriter("myNet\\s/txt"));
String line;
while((line=br.readLine())!=null){
bw.write(line);
bw.newLine();
bw.flush();
}
bw.close();
ss.close();
}
}
案例5：在4的基础上给出反馈
//客户端
import java.net.*;
import java.io.*;
public class Main{
public static void main(String[] args) throws IOException {
Socket s=new Socket("192.168.1.66",10086);
//封装文本文件的数据
BufferedReader br =new BufferedReader(new FileReader("myNet\\s.java"));
//封装输出流写数据
BufferedWriter bw =new BufferedWriter(new OutputStreamWriter(s.getOutputStream()));
String line;
while((line=br.readLine())!=null){
bw.write(line);
bw.newLine();
bw.flush();
}
//给出反馈
BufferedWriter bwserver=new BufferedWriter(new OutputStreamWriter(s.getOutputStream()));
bwserver.writer("文件上传成功！");
bwserver.newLine();
bwserver.flush();
br.close();
s.close();
}
}
//服务器
import java.net.*;
import java.io.*;
public class Main{
public static void main(String[] args) throws IOException {
ServerSocket ss=new ServerSocket();
Socket s=ss.accept();
BufferedReader br=new BufferedReader(new InputStreamReader(s.getInputStream()));
//写入文本文件
BufferedWriter bw =new BufferedWriter(new FileWriter("myNet\\s/txt"));
String line;
while((line=br.readLine())!=null){
bw.write(line);
bw.newLine();
bw.flush();
}
//自定义结束标记
bw.write("886");
bw.newLine();
bw.flush();
s.shutdownOutput();//特殊方法--标记
//接受反馈
BufferedReader brclient=new BufferedReader(new InputStreamReader(s.getInputStream()));
String data=brclient.readLine();//等待读取数据
System.out.println("服务器的反馈;"+data);
bw.close();
ss.close();
}
}
案例6：在5基础上接收多个
//客户端
import java.net.*;
import java.io.*;
public class Main{
public static void main(String[] args) throws IOException {
Socket s=new Socket("192.168.1.66",10086);
//封装文本文件的数据
BufferedReader br =new BufferedReader(new FileReader("myNet\\s.java"));
//封装输出流写数据
BufferedWriter bw =new BufferedWriter(new OutputStreamWriter(s.getOutputStream()));
String line;
while((line=br.readLine())!=null){
bw.write(line);
bw.newLine();
bw.flush();
}
//给出反馈
BufferedWriter bwserver=new BufferedWriter(new OutputStreamWriter(s.getOutputStream()));
bwserver.writer("文件上传成功！");
bwserver.newLine();
bwserver.flush();
br.close();
s.close();
}
}
//服务器
//Main.java
import java.net.*;
import java.io.*;
public class Main{
public static void main(String[] args) throws IOException {
ServerSocket ss=new ServerSocket(10086);
Socket s=ss.accept();
new Thread(new ServerThread(s)).start();
}
}
//ServerThread.java
import java.net.Scoket;
public class ServerThread implements Runnable{
private Socket s;
public ServerThread(Socket s){
this.s=s;
}
@Override
public void run(){
//接收数据
try{
BufferedReader br=new BufferedReader(new InputStreamReader(s.getInputStream()));
BufferedWriter bw=new BufferedWriter(new FileWriter("myNet\\Copy.java"));
//解决名称冲突问题**************
int count=0;
File file=new File("myNet\\Copy["+count+"].java);
while(file.exists()){
count++;
File file=new File("myNet\\Copy["+count+"].java);
}
String line;
while((line=br.readLine())!=null){
bw.write(line);
bw.newLine();
bw.flush();
}
//给出反馈
BufferedWriter bwServer=new BufferedWriter(new OutputStreamWriter(s.getOutputStream()));
bwServer.write("文件上传成功！");
bwServer.newLine();
bwServer.flush();
//释放资源
s.close();
}catch(IOException e){
e.printStackTrace();
}
}
}
Lambda表达式
相关应用：启动一个线程，在控制台输出一句话：多线程程序启动了
第一种方法：
//Main.java
public class Main{
public static void main(String[] args){
//实现类的实现方式启动了
myRunnable mt =new myRunnable();
Thread t=new Thread(my);
t.start();
}
}
//myRunnable.java
public class myRunnable implements Runnable{
@Override
public void run(){
System.out.println("多线程程序启动了");
}
}
第二种方法：
public class Main{
public static void main(String[] args){
//匿名内部类的方式改进
new Thread(new Runnable(){
@Override
public void run(){
System.out.println("多线程程序启动了");
}
}).start();
}
}
第三种方法：
public class Main{
public static void main(String[] args){
//Lambda表达式的方式改进
new Thread(()->{
System.out.println("多线程程序启动了");
}).start();
}
}
