URL 정보와 문서 정보 출력 프로그램

 

구성

- View 객체 : 화면을 구성하고 컴포넌트에 이벤트를 연결하는 객체

- Model 객체 : 해당 이벤트에 로직을 수행하여 결과를 View 객체에게 전달하는 객체

 

 

 View 객체 : ShowURLinfo

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.net.MalformedURLException;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.border.TitledBorder;

public class ShowURLinfo extends JFrame implements ActionListener {

 

    private static final long serialVersionUID = 1L;
    private int x = 50;
    private int y = 50;
    private int width = 900;
    private int height = 600;
 
    private JTextField inputField;
    private JTextArea displayArea;
    private JPanel pInput;
    private JPanel pButton;
    private JButton showDocument, showInfo, reset;
 
    private SearchUrlInfo urlInfo;
 
    public ShowURLinfo() {
  
        super("Display URL Infomation");
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setBounds(x, y, width, height);
  
        Container c = getContentPane();
        c.setLayout(new BorderLayout());
        setVisible(true);
  
        showDocument = new JButton("Show Document");
        showDocument.addActionListener(this);
        showInfo = new JButton("Document Info");
        showInfo.addActionListener(this);
        reset = new JButton("Reset");
        reset.addActionListener(this);

        pButton = new JPanel();
        pButton.setLayout(new FlowLayout(FlowLayout.CENTER));
  
        pButton.add(showDocument);
        pButton.add(showInfo);
        pButton.add(reset);
  
        inputField = new JTextField("http://");
        inputField.setBorder(new TitledBorder("Enter URL here"));
        inputField.addActionListener(this);

        pInput = new JPanel();
        pInput.setLayout(new GridLayout(1,2));
  
        pInput.add(inputField);
        pInput.add(pButton);
  
        displayArea = new JTextArea();
  
        c.add(pInput, BorderLayout.NORTH);
        c.add(new JScrollPane(displayArea), BorderLayout.CENTER);
 
    }

 
    public void actionPerformed(ActionEvent evt) {

 

        String command = evt.getActionCommand();
        String urlAddress = inputField.getText();
  
        displayArea.setText("");
        inputField.setText("http://");
  
        try {
            urlInfo = new SearchUrlInfo(displayArea, urlAddress);
        } catch(MalformedURLException e) {
            displayArea.append("This url is not correct!");
            return ;
        } 
    
        if ( command.equals("Show Document")) {
            urlInfo.readURLData();
        }else if ( command.equals("Document Info") ){
            urlInfo.useURLConnection();
        }else if ( command.equals("Reset") ){
            displayArea.setText("");
            inputField.setText("http://");
        }
    } 

 
    public static void main(String[] args) {
        new ShowURLinfo();
    }
 
}

 

Model 객체 : SearchUrlInfo

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.util.Date;

import javax.swing.JTextArea;

public class SearchUrlInfo {
 
    private JTextArea area;
    private URL url;
    private URLConnection connector;
 
 
    public SearchUrlInfo(JTextArea area, String url) throws MalformedURLException {
        this.area = area;
        this.url = new URL(url);
    }

 
    public void readURLData() {
  
        InputStream istream = null;
        BufferedReader reader = null;
  
        try{
            istream = url.openStream();
            reader = new BufferedReader( new InputStreamReader(istream) );
   
            area.append("-----------------  URL Data  -----------------\n");
   
            String input;
            while( ( input = reader.readLine() ) != null ){
                area.append("  " + input + "\n");
             }

        }catch(Exception e){
            area.append("Stream didn't open!\n");
        }finally {
            if ( istream != null ) try { istream.close(); } catch(IOException e) {}
        }
    }
 
    public void useURLConnection(){
  
        try {
            connector = url.openConnection();
        } catch (IOException e) {
            area.append("This url didn't connect!");
        }
  
        try {
            area.append("-----------------  URL Document Data  -----------------\n");
            area.append("Document Type : "+ connector.getContentType() + "\n");
            area.append("Document length : "+ connector.getContentLength() + "\n");
            area.append("Last Modified : "+ new Date(connector.getLastModified()) + "\n");
            area.append("Server's clock : "+ new Date(connector.getDate())+ "\n"); 
        } catch (IllegalArgumentException e) {
            area.append("This url is not have host address!");
        }

  

    }

}

 

[위 코드의 실행 파일]

 

 

ShowUrlInfo.jar

 

ShowUrlInfo.jar

0.01MB