java¼ÆËãÎļþºÍ×Ö·û´®µÄmd5Âë
import java.io.File;
import java.io.FileInputStream;
import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
public class MD5Util
{
private static char md5Chars[] =
{ '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd',
'e', 'f' };
private static MessageDigest messagedigest;
/*»ñȡһ¸öÎļþµÄmd5Âë */
public static String getFileMD5String(File file) throws Exception
{
messagedigest = MessageDigest.getInstance("MD5");
FileInputStream in = new FileInputStream(file);
FileChannel ch = in.getChannel();
MappedByteBuffer byteBuffer = ch.map(FileChannel.MapMode.READ_ONLY, 0,
file.length());
messagedigest.update(byteBuffer);
return bufferToHex(messagedigest.digest());
}
/*»ñȡһ¸ö×Ö·û´®µÄmd5Âë */
public static String getStringMD5String(String str) throws Exception
{
messagedigest = MessageDigest.getInstance("MD5");
messagedigest.update(str.getBytes());
return bufferToHex(messagedigest.digest());
}
/*ÑéÖ¤Ò»¸ö×Ö·û´®ºÍÒ»¸öMD5ÂëÊÇ·ñÏàµÈ */
public static boolean check(String str,String md5) throws Exception
{
if(getStringMD5String(str).equals(md5))
return true;
else
return false;
}
/*ÑéÖ¤Ò»¸öÎļþºÍÒ»¸öMD5ÂëÊÇ·ñÏàµÈ */
public static boolean check(File f,String md5) throws Exception
{
if(getFileMD5String(f).equals(md5))
return true;
else
return false;
}
private static String bufferToHex(byte bytes[])
{
return bufferToHex(bytes, 0, bytes.length);
}
private static String bufferToHex(byte b
Ïà¹ØÎĵµ£º
JavaµÄ¶ÑÊÇÒ»¸öÔËÐÐʱÊý¾ÝÇø£¬ÀàµÄʵÀý(¶ÔÏó)´ÓÖзÖÅä¿Õ¼ä¡£JavaÐéÄâ»ú(JVM)
µÄ¶ÑÖд¢´æ×ÅÕýÔÚÔËÐеÄÓ¦ÓóÌÐòËù½¨Á¢µÄËùÓжÔÏó£¬ÕâЩ¶ÔÏóͨ¹ýnew¡¢newarray¡¢anewarrayºÍmultianewarrayµÈÖ¸Á
Á¢£¬µ«ÊÇËüÃDz»ÐèÒª³ÌÐò´úÂëÀ´ÏÔʽµØÊÍ·Å¡£Ò»°ãÀ´Ëµ£¬¶ÑµÄÊÇÓÉÀ¬»ø»ØÊÕ
À´¸ºÔðµÄ£¬¾¡¹ÜJVM¹æ·¶²¢²»ÒªÇóÌØÊâµÄÀ¬»ø»ØÊÕ¼¼Êõ£ ......
java_home
C:\Program Files\Java\jdk1.6.0_16
Path
%java_home%\bin;%java_home%\lib;
classpath
%java_home%\lib\dt.jar;%java_home%\lib\tools.jar;.;
java_home
C:\Program Files\Java\jdk1.6.0_16
Path
%SystemRoot%\system32;%java_home%\bin;%java_home%\lib;%SystemRoot%;%SystemRoot%\System32\Wbem;C:\P ......
ÎÒÄܳéÏó³öÕû¸öÊÀ½ç£®£®£®
µ«ÊÇÎÒ²»ÄܳéÏó³öÄ㣮£®£®
ÒòΪÄãÔÚÎÒÐÄÖÐÊÇÄÇôµÄ¾ßÌ壮£®£®
ËùÒÔÎÒµÄÊÀ½ç²¢²»ÍêÕû£®£®£®
ÎÒ¿ÉÒÔÖØÔØÉõÖÁ¸²¸ÇÕâ¸öÊÀ½çÀïµÄÈκÎÒ»ÖÖ·½·¨£®£®£®
µ«ÊÇÎÒÈ´²»ÄÜÖØÔØ¶ÔÄãµÄ˼Ä£®£®
Ò²ÐíÃüÖÐ×¢¶¨ÁË ÄãÔÚÎÒµÄÊÀ½çÀïÓÀÔ¶µÄÀÓÉÏÁ˾²Ì¬µÄÊôÐÔ£®£®£®
¶øÎÒ²»É÷µ÷ÓÃÁ˰®ÄãÕâ¸ö·½·¨£®£®£®
µ ......
public class TextDemo {
public static void main(String[] args) {
RunnableEemo r1 = new RunnableEemo();
r1.REemo(r1);
System.out.println(r1.print());
}
}
class RunnableEemo extends ThreadRun implements Runnable {
Thread t2 = null;
public void REemo(RunnableEemo r1) {
Thread t1 = ......
Java ÊÇÒÔÀࣨclass£©µÄÐÎʽÀ´×éÖ¯³ÌÐò£¬²¢ÇÒ»¹Ó²ÐԹ涨£¬ËùÓÐÀàµÄµÄ¸ù½Úµã¶¼ÊÇObjectÀ࣬ÆäÓàµÄ¶¼ÊÇÆä×ÓÀà¡£
Java½öÖ§³Öµ¥¼Ì³Ð£¬¼´Ò»¸öÀàÖ»ÄÜÓÐÒ»¸ö¸¸Àà¡£
Java²»µ¥ÊÇÒ»¸öÃæÏò¶ÔÏóµÄ±à³ÌÓïÑÔ£¬ ³ýÁËÖ§³Ö¶ÔÏóÊý¾ÝÀàÐÍÍ⣬»¹Ö§³ÖһЩ»ù´¡Êý¾ÝÀàÐÍ£¬ÈçÕûÐÍ¡¢ÊµÐÍ¡¢×Ö·ûÐͺͲ¼¶ûÀàÐ͵ȡ£
JavaÓïÑÔµÄÓ¦ÓóÌÐò±à³ ......