使用了junit4.12
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
案例详情
package _7jvm;
import org.junit.Test;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.concurrent.TimeUnit;
public class IOTest {
@Test
public void client() {
Socket socket = null;
OutputStream outputStream = null;
InputStream inputStream=null;
try {
//1.创建客户端对象，并指定连接的IP地址或主机名+端口号
socket = new Socket("127.0.0.1", 9999);
//2.获取这个通道的流，输出数据到通道中
outputStream = socket.getOutputStream();
//3.发送数据
outputStream.write("你好".getBytes());
socket.shutdownOutput();//通过shutdownOutput高速服务器已经发送完数据，后续只能接受数据
//4.接受响应
inputStream=socket.getInputStream();
byte[] bys = new byte[1024];
int len;
StringBuilder sb = new StringBuilder();
while ((len = inputStream.read(bys)) != -1) {
sb.append(new String(bys, 0, len,"UTF-8"));
}
System.out.println("Client:收到响应:"+sb.toString());
} catch (Exception e) {
e.printStackTrace();
} finally {
//5.关闭资源
try {
if (inputStream != null) {
inputStream.close();
}
if (outputStream != null) {
outputStream.close();
}
if (socket != null) {
socket.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
@Test
public void server() {
ServerSocket server=null;
Socket socket=null;
InputStream inputStream=null;
OutputStream outputStream = null;
try {
//1.创建客户端对象，并绑定端口
server = new ServerSocket(9999);
//2.阻塞监听通道，有数据传输就返回一个Socket对象
socket = server.accept();
inputStream = socket.getInputStream();
byte[] bys = new byte[1024];
int len;
StringBuilder sb = new StringBuilder();
while ((len = inputStream.read(bys)) != -1) {//只有当客户端关闭它输出流的时候，服务端才能取得结尾的-1
sb.append(new String(bys, 0, len, "UTF-8"));
}
//3.解析数据
System.out.println("Server:收到请求:"+sb.toString());
System.out.println("Server:模拟延迟3s");
TimeUnit.SECONDS.sleep(3);
//4.响应客户端
outputStream = socket.getOutputStream();
outputStream.write("OK".getBytes());
} catch (Exception e) {
e.printStackTrace();
} finally {
//5.关闭资源
try {
if (outputStream != null) {
outputStream.close();
}
if (inputStream != null) {
inputStream.close();
}
if (socket != null) {
socket.close();
}
if (server != null) {
server.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
//Server打印
Connected to the target VM, address: '127.0.0.1:58927', transport: 'socket'
Server:收到请求:你好
Server:模拟延迟3s
//Client打印
Connected to the target VM, address: '127.0.0.1:58943', transport: 'socket'
Disconnected from the target VM, address: '127.0.0.1:58943', transport: 'socket'
Client:收到响应:OK //3秒后打印
