logleftpanel.java

模仿腾讯QQ的

package com.softfz.jn0708.main.log;



import java.awt.BorderLayout;
import java.awt.Color;
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;

import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.border.TitledBorder;

import com.softfz.jn0708.util.Log;


/**
 * 日志面板中的左边面板.
 * 
 * @author 
 * 
 */
public class LogLeftPanel extends JPanel {

	private static final long serialVersionUID = -6159911388364669463L;

	private Log serLog = null;

	private JTextArea todayTextArea = null;

	/**
	 * 构造方法.
	 * 
	 */
	public LogLeftPanel() {
		this.serLog = Log.getInstance(LogLeftPanel.class);
		init();
	}
	/**
	 *面板初始化方法
	 *
	 */
	private void init() {

		todayTextArea = new JTextArea();
		todayTextArea.setEditable(false);
		JScrollPane scrollPane = new JScrollPane(todayTextArea);
		this.setLayout(new BorderLayout());
		this.add(scrollPane);
		this.setBorder(new TitledBorder("当天日志"));
		this.setBackground(new Color(241,250,255));
		readTodayLogFile();
	}

	/**
	 * 读取文件的方法
	 *
	 */
	private void readTodayLogFile() {
		FileReader fReader = null;
		BufferedReader bReader = null;
		String tempStr = null;
		Date nowDate = new Date();
		DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
		String today = dateFormat.format(nowDate);
		try {
			fReader = new FileReader("./Log.txt");
			bReader = new BufferedReader(fReader);
			while ((tempStr = bReader.readLine()) != null) {
				if (tempStr.indexOf(today)!=-1){
					todayTextArea.append(tempStr);
					todayTextArea.append("\n");
				}
			}
		} catch (FileNotFoundException e) {
			serLog.log(e);
		} catch (IOException e) {
			serLog.log(e);
		}
	}
	
	/**
	 * 获取今天日志的面板
	 * @return
	 */
	public JTextArea getTodayTextArea() {
		return todayTextArea;
	}
}