JavaNIO阻塞IO
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package com.java.NIO; import java.io.IOException; import java.net.InetSocketAddress; import java.nio.ByteBuffer; import java.nio.channels.FileChannel; import java.nio.channels.ServerSocketChannel; import java.nio.channels.SocketChannel; import java.nio.file.Paths; import java.nio.file.StandardOpenOption; import org.junit.Test; public class TestBlockingNIO { @Test//客户端 public void client() throws IOException{ //1.获取通道 SocketChannel sChannel = SocketChannel.open(new InetSocketAddress("127.0.0.1", 1008)); FileChannel inChannel = FileChannel.open(Paths.get("1.jpg"), StandardOpenOption.READ); //2.分配指定大小的缓冲区 ByteBuffer buf = ByteBuffer.allocate(1024); int len = 0; //3.读取本地文件,并且发送到服务器 while(inChannel.read(buf)!=-1){ buf.flip(); sChannel.write(buf); buf.clear(); } //4.关闭通道 inChannel.close(); sChannel.close(); } @Test//服务器 public void server() throws IOException{ //1.获取通道 ServerSocketChannel ssChannel = ServerSocketChannel.open(); FileChannel outChannel = FileChannel.open(Paths.get("2.jpg"), StandardOpenOption.WRITE,StandardOpenOption.CREATE); //2.绑定链接 ssChannel.bind(new InetSocketAddress(1008)); //3.获取客户端连接通道 SocketChannel sChannel = ssChannel.accept(); //4.分配指定大小的缓冲区 ByteBuffer buf =ByteBuffer.allocate(1024); //5.接收客户数据并且保存到本地 while(sChannel.read(buf)!=-1){ buf.flip(); outChannel.write(buf); buf.clear(); } //6.关闭通道 sChannel.close(); outChannel.close(); ssChannel.close(); } }
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