java自定義日志輸出

public class LogUtil
{
    /**
     * 將信息寫入到日志
     */
    public static boolean writeLog(String className,String ErrorInfo,String ErrorContent){
        String content=info(className, ErrorInfo, ErrorContent);
        File fileName = new File(System.getProperty("user.dir")+"/config/log.log");
        RandomAccessFile mm = null;
        boolean flag = false;
        FileOutputStream o = null;
        try {
            o = new FileOutputStream(fileName,true);
            o.write(content.getBytes("utf-8"));
            o.close();
            flag = true;
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (mm != null) {
                try {
                    mm.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }

            }
        }
        return flag;
    }

    /**
     *
     * @param className 類名稱
     * @param ErrorInfo 錯誤信息
     * @param ErrorContent 錯誤內容
     * @return
     */
    public static String info(String className,String ErrorInfo,String ErrorContent){
        StringBuffer buffer=new StringBuffer();
        Date date = new Date();
        SimpleDateFormat sd = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        String d = sd.format(date)+"\r\n";
        buffer.append(d);
        buffer.append("錯誤類名為：").append(className).append("\r\n");
        buffer.append("錯誤信息為：").append(ErrorInfo).append("\r\n");
        buffer.append("錯誤內容為：").append(ErrorContent).append("\r\n");
        buffer.append("\r\n");
        return buffer.toString();
    }