strutil.java

用mina框架编写的转发代理服务程序,含自动更新功能

package com.frontMachine.util;

import java.text.SimpleDateFormat;
import java.util.Date;

/**
 * @公共函数类
 * @author kingchen
 * @version 1.0
 */
public class StrUtil
{
	public static boolean checkEmpty(String XML,String s[])
	{
		int i = 0;
		for(i=0;i<s.length;i++)
		{
			if(getXMLData(XML,s[i]).equals(""))
			{
				return false;
			}
		}
		return true;
	}
	public static byte[] packageXML(String XML)
	{
		byte[] xmlbyte = XML.getBytes();
		int len = xmlbyte.length;
		/*int a1=len%256;
		int a2=(len/256)%256;
		int a3=(len/256/256)%256;
		int a4=len/256/256/256;
		ob[0]=(byte)a1;
		ob[1]=(byte)a2;
		ob[2]=(byte)a3;
		ob[3]=(byte)a4;*/
		byte[] ob = new byte[len+4];
		byte[] lenByte = IntToBytesL(len);
		ob[0]=lenByte[0];
		ob[1]=lenByte[1];
		ob[2]=lenByte[2];
		ob[3]=lenByte[3];
		for(int i=0;i<xmlbyte.length;i++)
		{
			ob[i+4]=xmlbyte[i];
		}
		return ob;
	}
	public static String showNull(String str)
	{
		try
		{
			if(str==null)	
			{
				return "";
			}
			if("null".equals(str))
			{
				return "";
			}
		}
		catch (RuntimeException e)
		{
			System.out.println(e);
		}
		return str;
	}
	public static String getXMLData(String XML,String name)
	{
		try
		{
			if(XML==null || name==null)
			{
				return "";
			}
			int len1 = name.length();
			int i = XML.indexOf("<"+name+">");
			if(i>=0)
			{
				int j=XML.indexOf("</"+name+">");
				if(j>=0)
				{
					return (XML.substring(i+len1+2,j).trim());
				}
				return "";
			}
			return "";
		}catch(Exception e)
		{
			return "";
		}
	}
	public static String setXMLData(String XML,String name,String data)
	{
		try
		{
			if(XML==null || name==null)
			{
				XML="";
			}
			String XML2=XML;
			int len=XML.length();
			int len1=name.length();
			int i= XML.indexOf("<"+name);
			if(i>=0)
			{
				int j=XML.indexOf("/"+name);
				if(j>=0)
				{
					return (XML.substring(0,i+len1+2)+data+XML2.substring(j-1,len));
				}
				return XML;
			}
			return XML;
		}catch(Exception e)
		{
			return XML;
		}
	}
	public static String getCurrentDate()
	{
		SimpleDateFormat dateformat=new SimpleDateFormat("yyyyMMdd"); 
		Date currentdate = new Date(); 
		return (""+dateformat.format(currentdate)); 
	}
	public static String getCurrentTime()
	{
		SimpleDateFormat dateformat=new SimpleDateFormat("HHmmss"); 
		Date currenttime = new Date(); 
		return (""+dateformat.format(currenttime)); 
	}
	public static String getCurrDateTime()
	{
		SimpleDateFormat dateformat=new SimpleDateFormat("yyyyMMddHHmmss"); 
		Date currenttime = new Date(); 
		return (""+dateformat.format(currenttime)); 
	}
	/**************Int 低位放前面 begin *************/
	public static int BytesToIntL(byte[] b)
	{
		return (int)((((b[3] & 0xff) << 24) | ((b[2] & 0xff) << 16) | ((b[1] & 0xff) <<  8) | ((b[0] & 0xff) <<  0)));
	}
	public static byte[] IntToBytesL(int x)
	{
		byte[] b = new byte[4];
		b[3] = (byte)(x >> 24);
		b[2] = (byte)(x >> 16);
		b[1] = (byte)(x >> 8);
		b[0] = (byte)(x >> 0);
		return b;
	}
	/**************int 低位放前面 end *************/
	
	/**************int 高位放前面 begin *************/
	public static int BytesToIntB(byte[] b)
	{
		try
		{
			int value = (int)((((b[0] & 0xff) << 24) | ((b[1] & 0xff) << 16) | ((b[2] & 0xff) <<  8) | ((b[3] & 0xff) <<  0)));
			return value;
		}
		catch (RuntimeException e)
		{
			return -1;
		}
	}
	public static byte[] IntToBytesB(int x)
	{
		byte[] b = new byte[4];
		b[0] = (byte)(x >> 24);
		b[1] = (byte)(x >> 16);
		b[2] = (byte)(x >> 8);
		b[3] = (byte)(x >> 0);
		return b;
	}
	/**************Int 高位放前面 end *************/
	/**************Float 低位放前面 begin *************/
	public static byte[] FloatToBytesL(float x)
	{
		return IntToBytesL(Float.floatToRawIntBits(x));
	}
	public static float BytesToFloatL(byte[] b)
	{
		return Float.intBitsToFloat(BytesToIntL(b));
	}
	/**************Float 低位放前面 end *************/
	
	/**************Float 高位放前面 begin *************/
	public static byte[] FloatToBytesB(float x)
	{
		return IntToBytesB(Float.floatToRawIntBits(x));
	}
	public static float BytesToFloatB(byte[] b)
	{
		return Float.intBitsToFloat(BytesToIntB(b));
	}
	/**************Float 高位放前面 end *************/
	public static String byte2hex(byte[] b)
	{
		if(b==null)
		{
			return "";
		}
		String hs = "";
		String stmp = "";
		for (int n = 0; n < b.length; n++)
		{
			//System.out.println("-----------["+b[n]+"]---------");
			stmp = (java.lang.Integer.toHexString(b[n] & 0XFF));
			if (stmp.length() == 1)
				hs = hs + "0" + stmp;
			else
				hs = hs + stmp;
			// if (n<b.length-1) hs=hs+":";
		}
		return hs.toUpperCase();
	}
	public static byte[] hex2byte(String hex)
	{ 
		//System.out.println(hex);
		int len = hex.length();
		byte[] b;
		try
		{
			int byteint = 0;
			String swap = "";
			if (len % 2 != 0) 
			{ 
				return new byte[len/2];
			}
			char[] arr = hex.toCharArray(); 
			b = new byte[len/2]; 
			for (int i = 0, j = 0, l = len; i < l; i++, j++) 
			{
				swap = "" + arr[i++] + arr[i]; 
				//System.out.println("----"+(Integer.parseInt(swap,16)));
				byteint = Integer.parseInt(swap,16)&0xFF; 
				b[j] = new Integer(byteint).byteValue();
			}
			return b; 
		}
		catch (NumberFormatException e)
		{
			return new byte[len/2];
		} 
	}
	public static void main(String[] args)
	{
		System.out.println(getCurrentTime());
	}

}