java自定义日志文件

package com.common.util;

import java.io.*;
import java.util.Properties;

/**
 * @author Administrator
 */
public class CreateLog {

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
    // windows文件保存路径设置
    private static String lpath = "/root/logs/log/";
    //linux 系统该路径
    private static String wpath = "d:/log/";
    private static String filenameTemp;

    public static boolean isOSLinux() {
        Properties prop = System.getProperties();

        String os = prop.getProperty("os.name");
        if (os != null && os.toLowerCase().indexOf("linux") > -1) {
            return true;
        } else {
            return false;
        }
    }

    public static boolean creatLogFile(String name) throws IOException {
        boolean flag = false;
        String path = "";
        if(isOSLinux()){
            path=lpath;
        }else {
            path=wpath;
        }
        filenameTemp = path + name + ".log";
        File filename = new File(filenameTemp);
        File fileParent = filename.getParentFile();
        if (!fileParent.exists()) {
            fileParent.mkdirs();
        }
        if (!filename.exists()) {
            filename.createNewFile();
            flag = true;
        }
        return flag;

    }

    public static boolean writeLogFile(String newStr) throws IOException {
        // 先读取原有文件内容，然后进行写入操作
        boolean flag = false;
        String filein = newStr + "\r\n";
        String temp = "";
        FileInputStream fis = null;
        InputStreamReader isr = null;
        BufferedReader br = null;
        FileOutputStream fos = null;
        PrintWriter pw = null;
        try {
            // 文件路径
            File file = new File(filenameTemp);
            // 将文件读入输入流
            fis = new FileInputStream(file);
            isr = new InputStreamReader(fis);
            br = new BufferedReader(isr);
            StringBuffer buf = new StringBuffer();
            // 保存该文件原有的内容
            for (int j = 1; (temp = br.readLine()) != null; j++) {
                buf = buf.append(temp);
                // System.getProperty("line.separator")

                // 行与行之间的分隔符 相当于“\n”
                buf = buf.append(System.getProperty("line.separator"));
            }
            buf.append(filein);
            fos = new FileOutputStream(file);
            pw = new PrintWriter(fos);
            pw.write(buf.toString().toCharArray());
            pw.flush();
            flag = true;
        } catch (IOException e1) {

            // TODO 自动生成 catch 块

            throw e1;
        } finally {
            if (pw != null) {
                pw.close();
            }
            if (fos != null) {
                fos.close();
            }
            if (br != null) {
                br.close();
            }
            if (isr != null) {
                isr.close();
            }
            if (fis != null) {
                fis.close();
            }
        }
        return flag;
    }

    public static void main(String[] args) throws Exception {

        creatLogFile(sdf.format(new Date()));

        writeLogFile("日志内容");

    }

}