用Java怎么编一个像10086自动应答的程序啊？忘详细说明啊！！！！！！！！！！！！！

20分没人给你写的

我可迟宏以给你些 提示

建立个 TCP 套接字 监听在 某 个端口，当 接受到某IP来的数据猛旦芹后

保存该 IP 然后 自动 对该 套接枝毕字的 输出流 内 写入 一段回复内容到指定IP~

import java.math.BigDecimal

public class JavaCourse {

private String sName//学生姓肆拆名

private String sId //学号

private int testGrade //测试成绩

private int regularGrade//平时成绩

private int endOfTermGrade//期末成绩

private int totalGrade //总成绩

public final double TR= 0.3

public final double RR= 0.3

public final double ER= 0.4

public JavaCourse() {

}

public JavaCourse(String sName, String sId, int testGrade, int regularGrade, int endOfTermGrade) {

this.sName = sName

this.sId = sId

this.testGrade = testGrade

this.regularGrade = regularGrade

this.endOfTermGrade = endOfTermGrade

}

public String getsName() {

return sName

}

public void setsName(String sName) {

this.sName = sName

}

public String getsId() {

return sId

}

public void setsId(String sId) {

this.sId = sId

}

public int getTestGrade() {

return testGrade

}

public void setTestGrade(int testGrade) {

this.testGrade = testGrade

}

public int getRegularGrade() {

return regularGrade

}

public void setRegularGrade(int regularGrade) {

this.regularGrade = regularGrade

}

public int getEndOfTermGrade() {

return endOfTermGrade

}

public void setEndOfTermGrade(int endOfTermGrade) {

this.endOfTermGrade = endOfTermGrade

}

public int getTotalGrade() {

return totalGrade

}

@Override

public String toString() {

return "JavaCourse{" +

"sName='" + sName + '\'' +

", sId='" + sId + '\'' +

", testGrade=" + testGrade +

", regularGrade=" + regularGrade +

", endOfTermGrade=" + endOfTermGrade +

'}'

}

public void showTotalGrad() {

//double四舍五入（0.5->1）转int类型

totalGrade = Integer.parseInt(new BigDecimal((testGrade * TR + regularGrade * RR + endOfTermGrade * ER)).setScale(0, BigDecimal.ROUND_HALF_UP).toString())

System.out.println("课差庆程的总成绩：" + totalGrade)

}

}

public class DemoTest02 {

public static void main(String[] args) {

JavaCourse student1 = new JavaCourse()

student1.setsName("小张虚雹握")

student1.setsId("10086")

student1.setTestGrade(85)

student1.setRegularGrade(90)

student1.setEndOfTermGrade(86)

System.out.println(student1.toString())

student1.showTotalGrad()

JavaCourse student2 = new JavaCourse("老王","10010",60,80,45)

System.out.println(student2.toString())

student2.showTotalGrad()

}

}

1，保证主线程阻塞，即并州在执行main方法里添加阻塞代码。

2，比如Java做服务器时，接收soket信息，

ServerSocket serverSocket =newServerSocket(10086)//1024-65535的某个端口 

//2、调用accept()方法开始监听，等待客户端的连接 明野

while(true){}

Socket socket = serverSocket.accept() 

//3、获取输入流，激蔽喊并读取客户端信息 

InputStream is = socket.getInputStream() 

InputStreamReader isr =newInputStreamReader(is) 

BufferedReader br =newBufferedReader(isr) 

String info =null 

while((info=br.readLine())!=null){ 

System.out.println("我是服务器，客户端说："+info)； 

} 

}

3，添加阻塞代码：

Semaphore semaphore = new Semaphore(0)

try {

semaphore.acquire()

} catch (InterruptedException e) {

// TODO Auto-generated catch block

e.printStackTrace()

}

这段代码是不占cpu的。它会让出cpu的执行权。

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