我的JAVA工具方法常用类

package com.citic.util.comm;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.PrintStream;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

import com.citic.util.comm.ConfigFileUtil;

/**
 * Java实现类似C/C++中的__FILE__、__FUNC__、__LINE__等,主要用于日志等功能中。
 * 
 * @version 1.0 2011-07-13
 * 未使用log4j,没月认真研究 张明伟20170518
 */
public class CommFun implements IConstants{
    /**
     * 打印日志
     */
    private static String filepth = null;
    private static SimpleDateFormat ft = new SimpleDateFormat("yyyyMMddHHmmSS");
    private static String[] logfiles=new String[LOGLEVEL.values().length]; //{"err","info","data","debug","all",null};
    private static FileOutputStream[] out=new FileOutputStream[LOGLEVEL.values().length];
    private static PrintStream[] ps=new PrintStream[LOGLEVEL.values().length];
    private static PrintStream stdps=new PrintStream(System.out);
    private static CommFun commfun=null,commfun1=null; 
    private CommFun() {
        filepth = ConfigFileUtil.getInstance().getPathName("..");
        String day = ft.format(new Date());
        System.out.println("dt is " + day);
        File tfile = new File(filepth + "logs/");
        if (!tfile.exists()) {
            tfile.mkdir();
        }
//        FileOutputStream out= new FileOutputStream(tfile.getPath()
//                    + "/systemout" + day.substring(0, 8) + ".log", true);
//        FileOutputStream errout = new FileOutputStream(tfile.getPath()
//                + "/systemerrout" + day.substring(0, 8) + ".log", true);
//        for(int i=0;i<logfiles.length;i++){
//            try {
//                String tmpstr = tfile.getPath() + File.separator +"SUPIS_" + LOGLEVEL.values()[i].name()
//                        + day.substring(0, 8) + ".log";
//                //System.out.println(tmpstr);
//                out[i] = new FileOutputStream(tmpstr, true);
//            } catch (FileNotFoundException e) {
//                e.printStackTrace();
//            }
//            ps[i] = new PrintStream(out[i]);
//        }
    }
    
    private CommFun(int debuglevel){
        if (debuglevel == 0) {
            return;
        }
        
        if (debuglevel >= ALL || debuglevel <= 0) {
            debuglevel = ALL;
        }
        
        if (commfun == null) {
            commfun = new CommFun();
        }
        
        if(ps[debuglevel-1]!=null){
            return;
        }
        
        File tfile = new File(filepth + "logs/");
        String day = ft.format(new Date());
        try {
            String tmpstr = tfile.getPath() + File.separator + "SUPIS_"
                    + LOGLEVEL.values()[debuglevel-1].name() + day.substring(0, 8)
                    + ".log";
            //System.out.println(tmpstr);
            out[debuglevel-1] = new FileOutputStream(tmpstr, true);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
        ps[debuglevel-1] = new PrintStream(out[debuglevel-1]);
    }
    
    public static void log() {
        System.setOut(stdps);
        System.out.println(getFileLineMethod());
    }

    public static void log(int debuglevel, String... parms) {
        if (debuglevel == 0) {
            return;
        }
        new CommFun(debuglevel);
        new CommFun(ALL);
        StringBuffer stb = null;
        if (parms == null || "".equals(parms)) {
            stb = new StringBuffer("");
        } else {
            stb = new StringBuffer(parms.length);
            for (int i = 0; i < parms.length; i++) {
                stb.append(parms[i] == null ? "" : parms[i]);
            }
        }
        String messge = getFileLineMethod() + "[" + _TIME_() + "]"
                + stb.toString();
        
        if (debuglevel >= logfiles.length) {
            debuglevel=ALL;
        }
        System.setOut(ps[debuglevel - 1]);
        System.out.println(messge);
        if (debuglevel != ALL) {
            System.setOut(ps[ALL-1]);
            System.out.println(messge);
        }
    }
    
    public static void log(String... parms) {
        new CommFun(ALL);
        StringBuffer stb=null;
        if(parms==null||"".equals(parms)){
            stb=new StringBuffer("");
        }else{
            stb = new StringBuffer(parms.length);    
            for(int i=0;i<parms.length;i++){
                stb.append(parms[i]==null?"":parms[i]);
            }
        }
        String messge=getFileLineMethod()+ "["+_TIME_()+"]"+ stb.toString();
        System.setOut(ps[ALL-1]);
        System.out.println(messge);
    }

    /**
     * 打印日志时获取当前的程序文件名、行号、方法名 输出格式为：[FileName | LineNumber | MethodName]
     * 
     * @return
     */
    public static String getFileLineMethod() {
        StackTraceElement traceElement = ((new Exception()).getStackTrace())[2];
        StringBuffer toStringBuffer = new StringBuffer("[")
                .append(traceElement.getFileName()).append(":")
                .append(traceElement.getLineNumber()).append(":")
                .append(traceElement.getMethodName()).append("]");
        return toStringBuffer.toString();
    }

    // 当前文件名
    public static String _FILE_() {
        StackTraceElement traceElement = ((new Exception()).getStackTrace())[2];
        return traceElement.getFileName();
    }

    // 当前方法名
    public static String _FUNC_() {
        StackTraceElement traceElement = ((new Exception()).getStackTrace())[2];
        return traceElement.getMethodName();
    }

    // 当前行号
    public static int _LINE_() {
        StackTraceElement traceElement = ((new Exception()).getStackTrace())[2];
        return traceElement.getLineNumber();
    }

    // 当前时间
    public static String _TIME_() {
        Date now = new Date();
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS");
        return sdf.format(now);
    }

    // 把string转换成date
    public static Date stringToDate(String date, String pattan) {
        DateFormat sf1 = new SimpleDateFormat("yyyyMMdd");
        DateFormat sf2 = new SimpleDateFormat(pattan);
        String sfstr = "";
        try {
            // sfstr = sf2.format(sf1.parse(date));
            sfstr = sf2.format(sf2.parse(date));
        } catch (ParseException e) {
            e.printStackTrace();
        }

        DateFormat df = new SimpleDateFormat(pattan);
        Date d1;
        try {
            d1 = df.parse(sfstr);
            Calendar g = Calendar.getInstance();
            g.setTime(d1);
            return g.getTime();
        } catch (ParseException e) {
            e.printStackTrace();
        }

        return null;
    }
    
    public static String strNow(){
        return new SimpleDateFormat("yyyyMMddHHmmssSSS").format(new Date());
    }
    
    public static String strNowRand(){
        SimpleDateFormat ft = new SimpleDateFormat("yyyyMMddHHmmssSSS");
        Date dt = new Date();
        Integer i = (int) (100000000 + Math.random() * 100000000);
        return ft.format(dt) + String.format("%010d", i);
    }
    
    public static void log2file(String filepth){
        try {
            File tfile = new File(filepth + "logs/");
            if (!tfile.exists()) {
                tfile.mkdir();
            }

            FileOutputStream out = new FileOutputStream(tfile.getPath()
                    + "/systemout" + strNow().substring(0, 8) + ".txt", true);
            FileOutputStream errout = new FileOutputStream(tfile.getPath()
                    + "/systemerrout" + strNow().substring(0, 8) + ".txt", true);
            
            PrintStream ps = new PrintStream(out);
            PrintStream pserr = new PrintStream(errout);
            System.setOut(ps);
            System.setErr(pserr);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
    }
    
}