import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

/**
 * 提供輸入輸出等操作，實現與用戶的交互操作
 * @author Crise.Lee
 * @version 1.0
 */
public class IOInput {
	private String url,commLine;
	private Integer port;
	
	/**
	 * 輸入一個綁定到URL
	 * @return
	 * @throws IOException
	 */
	 public String inputURL() throws IOException
	{
		System.out.print("請輸入一個URL:");
		url=null;
		BufferedReader input=new BufferedReader(new InputStreamReader(System.in));
		try {
			url=input.readLine();
		} catch (IOException e) {
			//e.printStackTrace();
			throw new IOException("輸入URL時候IO發生錯誤。。。"); 
			
		}
		return url;
	}
	
	/**
	 * 輸入一條操作命令
	 * @return
	 * @throws IOException
	 */
	public String inputCommad() throws IOException
	{
		System.out.print("請輸入一個操作命令：");
		commLine=null;
		BufferedReader input=new BufferedReader(new InputStreamReader(System.in));
		try {
			commLine=input.readLine();
		} catch (IOException e) {
			 // e.printStackTrace();
			 throw new IOException("輸入操作的時候IO發生錯誤。。。"); 	
		}
		return commLine;
		     
	}
	
	/**
	 * 輸入一個端口號
	 * @return
	 * @throws IOException
	 */
	public int inputPort() throws IOException
	{
		Boolean isnumber=true;
		port=0;
		BufferedReader input=new BufferedReader(new InputStreamReader(System.in));
		while(isnumber)
		{
			try {
				System.out.print("請輸入一個端口號：");
				port=Integer.valueOf(input.readLine());
				isnumber=false;
			} catch (NumberFormatException e) {
				System.err.print("錯誤原因：輸入的為非整數,請重新輸入一個為整數的端口號：");
				input=new BufferedReader(new InputStreamReader(System.in));
				isnumber=true;
				//e.printStackTrace();
			}catch (IOException e) {
				//e.printStackTrace();
				throw new IOException("輸入端口的時候IO發生錯誤。。。。");	
			}
		}
		return port;
	}
	/**
	 * 返回端口號
	 * @return
	 */
	/**public Integer getPort()
	{
		return port;
	}*/
}