在Java中,java.security.MessageDigest (rt.jar中)已經定義了 MD5 的計算,因此咱們只須要簡單地調用便可獲得 MD5 的128 位整數。而後將此 128 位計 16 個字節轉換成 16 進製表示便可。 java
下面是一個可生成字符串或文件MD5校驗碼的例子,測試過,可當作工具類直接使用,其中最主要的是getMD5String(String s)和getFileMD5String(File file)兩個方法,分別用於生成字符串的md5校驗值和生成文件的md5校驗值,getFileMD5String_old(File file)方法可刪除,不建議使用:git
- package com.why.md5;
-
- import java.io.File;
- import java.io.FileInputStream;
- import java.io.IOException;
- import java.io.InputStream;
- import java.nio.MappedByteBuffer;
- import java.nio.channels.FileChannel;
- import java.security.MessageDigest;
- import java.security.NoSuchAlgorithmException;
-
- public class MD5Util {
-
- protected static char hexDigits[] = { '0' , '1' , '2' , '3' , '4' , '5' , '6' ,
- '7' , '8' , '9' , 'a' , 'b' , 'c' , 'd' , 'e' , 'f' };
-
- protected static MessageDigest messagedigest = null ;
- static {
- try {
- messagedigest = MessageDigest.getInstance("MD5" );
- } catch (NoSuchAlgorithmException nsaex) {
- System.err.println(MD5Util.class .getName()
- + "初始化失敗,MessageDigest不支持MD5Util。" );
- nsaex.printStackTrace();
- }
- }
-
-
- public static String getMD5String(String s) {
- return getMD5String(s.getBytes());
- }
-
-
- public static boolean checkPassword(String password, String md5PwdStr) {
- String s = getMD5String(password);
- return s.equals(md5PwdStr);
- }
-
-
- public static String getFileMD5String(File file) throws IOException {
- InputStream fis;
- fis = new FileInputStream(file);
- byte [] buffer = new byte [ 1024 ];
- int numRead = 0 ;
- while ((numRead = fis.read(buffer)) > 0 ) {
- messagedigest.update(buffer, 0 , numRead);
- }
- fis.close();
- return bufferToHex(messagedigest.digest());
- }
-
-
- public static String getFileMD5String_old(File file) throws IOException {
- 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());
- }
-
- public static String getMD5String( byte [] bytes) {
- messagedigest.update(bytes);
- return bufferToHex(messagedigest.digest());
- }
-
- private static String bufferToHex( byte bytes[]) {
- return bufferToHex(bytes, 0 , bytes.length);
- }
-
- private static String bufferToHex( byte bytes[], int m, int n) {
- StringBuffer stringbuffer = new StringBuffer( 2 * n);
- int k = m + n;
- for ( int l = m; l < k; l++) {
- appendHexPair(bytes[l], stringbuffer);
- }
- return stringbuffer.toString();
- }
-
- private static void appendHexPair( byte bt, StringBuffer stringbuffer) {
- char c0 = hexDigits[(bt & 0xf0 ) >> 4 ];
- char c1 = hexDigits[bt & 0xf ];
- stringbuffer.append(c0);
- stringbuffer.append(c1);
- }
-
- public static void main(String[] args) throws IOException {
- long begin = System.currentTimeMillis();
-
- File file = new File( "C:/12345.txt" );
- String md5 = getFileMD5String(file);
-
-
- long end = System.currentTimeMillis();
- System.out.println("md5:" + md5 + " time:" + ((end - begin) / 1000 ) + "s" );
- }
- }
- package com.why.md5;
-
- import java.io.File;
- import java.io.FileInputStream;
- import java.io.IOException;
- import java.io.InputStream;
- import java.nio.MappedByteBuffer;
- import java.nio.channels.FileChannel;
- import java.security.MessageDigest;
- import java.security.NoSuchAlgorithmException;
-
- public class MD5Util {
-
- protected static char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6',
- '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
-
- protected static MessageDigest messagedigest = null;
- static {
- try {
- messagedigest = MessageDigest.getInstance("MD5");
- } catch (NoSuchAlgorithmException nsaex) {
- System.err.println(MD5Util.class.getName()
- + "初始化失敗,MessageDigest不支持MD5Util。");
- nsaex.printStackTrace();
- }
- }
-
-
- public static String getMD5String(String s) {
- return getMD5String(s.getBytes());
- }
-
-
- public static boolean checkPassword(String password, String md5PwdStr) {
- String s = getMD5String(password);
- return s.equals(md5PwdStr);
- }
-
-
- public static String getFileMD5String(File file) throws IOException {
- InputStream fis;
- fis = new FileInputStream(file);
- byte[] buffer = new byte[1024];
- int numRead = 0;
- while ((numRead = fis.read(buffer)) > 0) {
- messagedigest.update(buffer, 0, numRead);
- }
- fis.close();
- return bufferToHex(messagedigest.digest());
- }
-
-
- public static String getFileMD5String_old(File file) throws IOException {
- 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());
- }
-
- public static String getMD5String(byte[] bytes) {
- messagedigest.update(bytes);
- return bufferToHex(messagedigest.digest());
- }
-
- private static String bufferToHex(byte bytes[]) {
- return bufferToHex(bytes, 0, bytes.length);
- }
-
- private static String bufferToHex(byte bytes[], int m, int n) {
- StringBuffer stringbuffer = new StringBuffer(2 * n);
- int k = m + n;
- for (int l = m; l < k; l++) {
- appendHexPair(bytes[l], stringbuffer);
- }
- return stringbuffer.toString();
- }
-
- private static void appendHexPair(byte bt, StringBuffer stringbuffer) {
- char c0 = hexDigits[(bt & 0xf0) >> 4];
- char c1 = hexDigits[bt & 0xf];
- stringbuffer.append(c0);
- stringbuffer.append(c1);
- }
-
- public static void main(String[] args) throws IOException {
- long begin = System.currentTimeMillis();
-
- File file = new File("C:/12345.txt");
- String md5 = getFileMD5String(file);
-
-
- long end = System.currentTimeMillis();
- System.out.println("md5:" + md5 + " time:" + ((end - begin) / 1000) + "s");
- }
- }
MD5的全稱是Message-digest Algorithm 5(信息-摘要算法),用於確保信息傳輸完整一致。90年代初由MIT的計算機科學實驗室和RSA Data Security Inc的Ronald L. Rivest開發出來,經MD二、MD3和MD4發展而來。算法
任何一個字符串或文件,不管是可執行程序、圖像文件、臨時文件或者其餘任何類型的文件,也無論它體積多大,都有且只有一個獨一無二的MD5信息碼,而且若是這個文件被修改過,它的MD5碼也將隨之改變。apache
Message-Digest泛指字節串(Message)的Hash變換,就是把一個任意長度的字節串變換成必定長的大整數。注意這裏說的是「字節串」而不是「字符串」,由於這種變換隻與字節的值有關,與字符集或編碼方式無關。數組
MD5用的是哈希函數,在計算機網絡中應用較多的不可逆加密算法有RSA公司發明的MD5算法和由美國國家技術標準研究所建議的安全散列算法SHA。安全
MD5將任意長度的「字節串」變換成一個128bit的大整數,而且它是一個不可逆的字符串變換算法,換句話說就是,即便你看到源程序和算法描述,也沒法 將一個MD5的值變換回原始的字符串,從數學原理上說,是由於原始的字符串有無窮多個,這有點象不存在反函數的數學函數。因此,要遇到了md5密碼的問 題,比較好的辦法是:你能夠用這個系統中的md5()函數從新設一個密碼,如admin,把生成的一串密碼的Hash值覆蓋原來的Hash值就好了。網絡
MD5的典型應用是對一段Message(字節串)產生fingerprint(指紋),以防止被「篡改」。舉個例子,你將一段話寫在一個叫 readme.txt文件中,並對這個readme.txt產生一個MD5的值並記錄在案,而後你能夠傳播這個文件給別人,別人若是修改了文件中的任何內 容,你對這個文件從新計算MD5時就會發現(兩個MD5值不相同)。若是再有一個第三方的認證機構,用MD5還能夠防止文件做者的「抵賴」,這就是所謂的 數字簽名應用。app
MD5還普遍用於操做系統的登錄認證上,如Unix、各種BSD系統登陸密碼、數字簽名等諸多方。如在UNIX系統中用戶的密碼是以 MD5(或其它相似的算法)經Hash運算後存儲在文件系統中。當用戶登陸的時候,系統把用戶輸入的密碼進行MD5 Hash運算,而後再去和保存在文件系統中的MD5值進行比較,進而肯定輸入的密碼是否正確。經過這樣的步驟,系統在並不知道用戶密碼的明碼的狀況下就可 以肯定用戶登陸系統的合法性。這能夠避免用戶的密碼被具備系統管理員權限的用戶知道。函數
如今被黑客使用最多的一種破譯密碼的方法就是一種被稱爲"跑字典"的方法。有兩種方法獲得字典,一種是平常蒐集的用作密碼的字符串表,另外一種是用排列組合 方法生成的,先用MD5程序計算出這些字典項的MD5值,而後再用目標的MD5值在這個字典中檢索。咱們假設密碼的最大長度爲8位字節(8 Bytes),同時密碼只能是字母和數字,共26+26+10=62個字符,排列組合出的字典的項數則是 P(62,1)+P(62,2)….+P(62,8),那也已是一個很天文的數字了,存儲這個字典就須要TB級的磁盤陣列,並且這種方法還有一個前提, 就是能得到目標帳戶的密碼MD5值的狀況下才能夠。這種加密技術被普遍的應用於UNIX系統中,這也是爲何UNIX系統比通常操做系統更爲堅固一個重要 緣由。工具
MD5算法
md5算法定義在RFC 1321中,由Ron Rivest(RSA公司)在1992年提出。然而不少學者已經找出了構造md5衝突的方法。這些人中包括中國山東大學的王教授和Hans Dobbertin。因此,單純使用md5的信息認證模式變得不可靠了。但並非說md5不可以使用。
MD5以512位分組來處理輸入的信息,且每一分組又被劃分爲16個32位子分組,通過了一系列的處理後,算法的輸出由四個32位分組組成,將這四個32位分組級聯後將生成一個128位散列值。
MD5算法的計算步驟:
1.經過添加一個1和若干個0的方式,把輸入數據長度(按照字節算)變成64m+56
2.添加8個字節到輸入數據中去,這樣輸入數據長度變成了64的倍數
3.把數據劃分紅塊,每塊64個字節
4.初始狀況下,輸出爲:
m_state[0] = 0x67452301L;
m_state[1] = 0xefcdab89L;
m_state[2] = 0x98badcfeL;
m_state[3] = 0x10325476L;
5.分別對每塊進行計算。輸出最後結果。
MD5的算法在RFC1321中實際上已經提供了C的實現,須要注意的是,不少早期的C編譯器的int類型是16 bit的,MD5使用了unsigned long int,並認爲它是32bit的無符號整數。而在Java中int是32 bit的,long是64 bit的。在MD5的C實現中,使用了大量的位操做。這裏須要指出的一點是,儘管Java提供了位操做,因爲Java沒有unsigned類型,對於右移 位操做多提供了一個無符號右移:>>>,等價於C中的 >> 對於unsigned 數的處理。
下面是一個MD5算法的Java實現:
- package com.why.md5;
-
- public class MD5_SRC {
-
- static final int S11 = 7 ;
-
- static final int S12 = 12 ;
-
- static final int S13 = 17 ;
-
- static final int S14 = 22 ;
-
- static final int S21 = 5 ;
-
- static final int S22 = 9 ;
-
- static final int S23 = 14 ;
-
- static final int S24 = 20 ;
-
- static final int S31 = 4 ;
-
- static final int S32 = 11 ;
-
- static final int S33 = 16 ;
-
- static final int S34 = 23 ;
-
- static final int S41 = 6 ;
-
- static final int S42 = 10 ;
-
- static final int S43 = 15 ;
-
- static final int S44 = 21 ;
-
- static final byte [] PADDING = { - 128 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 ,
- 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 ,
- 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 , 0 ,
- 0 , 0 , 0 , 0 , 0 , 0 , 0 };
-
-
- private long [] state = new long [ 4 ];
-
- private long [] count = new long [ 2 ];
-
- private byte [] buffer = new byte [ 64 ];
-
-
-
- public String digestHexStr;
-
-
- private byte [] digest = new byte [ 16 ];
-
-
- public String getkeyBeanofStr(String inbuf) {
- keyBeanInit();
- keyBeanUpdate(inbuf.getBytes(), inbuf.length());
- keyBeanFinal();
- digestHexStr = "" ;
- for ( int i = 0 ; i < 16 ; i++) {
- digestHexStr += byteHEX(digest[i]);
- }
- return digestHexStr;
- }
-
-
- public MD5_SRC() {
- keyBeanInit();
- return ;
- }
-
-
- private void keyBeanInit() {
- count[0 ] = 0L;
- count[1 ] = 0L;
-
- state[0 ] = 0x67452301L;
- state[1 ] = 0xefcdab89L;
- state[2 ] = 0x98badcfeL;
- state[3 ] = 0x10325476L;
- return ;
- }
-
- /*
- * F, G, H ,I 是4 個基本的keyBean函數,在原始的keyBean的C實現中,因爲它們是
- * 簡單的位運算,可能出於效率的考慮把它們實現成了宏,在java中,咱們把它們 實現成了private 方法,名字保持了原來C中的。
- */
- private long F( long x, long y, long z) {
- return (x & y) | ((~x) & z);
- }
-
- private long G( long x, long y, long z) {
- return (x & z) | (y & (~z));
- }
-
- private long H( long x, long y, long z) {
- return x ^ y ^ z;
- }
-
- private long I( long x, long y, long z) {
- return y ^ (x | (~z));
- }
-
-
- private long FF( long a, long b, long c, long d, long x, long s, long ac) {
- a += F(b, c, d) + x + ac;
- a = ((int ) a << s) | (( int ) a >>> ( 32 - s));
- a += b;
- return a;
- }
-
- private long GG( long a, long b, long c, long d, long x, long s, long ac) {
- a += G(b, c, d) + x + ac;
- a = ((int ) a << s) | (( int ) a >>> ( 32 - s));
- a += b;
- return a;
- }
-
- private long HH( long a, long b, long c, long d, long x, long s, long ac) {
- a += H(b, c, d) + x + ac;
- a = ((int ) a << s) | (( int ) a >>> ( 32 - s));
- a += b;
- return a;
- }
-
- private long II( long a, long b, long c, long d, long x, long s, long ac) {
- a += I(b, c, d) + x + ac;
- a = ((int ) a << s) | (( int ) a >>> ( 32 - s));
- a += b;
- return a;
- }
-
-
- private void keyBeanUpdate( byte [] inbuf, int inputLen) {
- int i, index, partLen;
- byte [] block = new byte [ 64 ];
- index = (int ) (count[ 0 ] >>> 3 ) & 0x3F ;
-
- if ((count[ 0 ] += (inputLen << 3 )) < (inputLen << 3 ))
- count[1 ]++;
- count[1 ] += (inputLen >>> 29 );
- partLen = 64 - index;
-
- if (inputLen >= partLen) {
- keyBeanMemcpy(buffer, inbuf, index, 0 , partLen);
- keyBeanTransform(buffer);
- for (i = partLen; i + 63 < inputLen; i += 64 ) {
- keyBeanMemcpy(block, inbuf, 0 , i, 64 );
- keyBeanTransform(block);
- }
- index = 0 ;
- } else
- i = 0 ;
-
- keyBeanMemcpy(buffer, inbuf, index, i, inputLen - i);
- }
-
-
- private void keyBeanFinal() {
- byte [] bits = new byte [ 8 ];
- int index, padLen;
-
- Encode(bits, count, 8 );
-
- index = (int ) (count[ 0 ] >>> 3 ) & 0x3f ;
- padLen = (index < 56 ) ? ( 56 - index) : ( 120 - index);
- keyBeanUpdate(PADDING, padLen);
-
- keyBeanUpdate(bits, 8 );
-
- Encode(digest, state, 16 );
- }
-
-
- private void keyBeanMemcpy( byte [] output, byte [] input, int outpos,
- int inpos, int len) {
- int i;
- for (i = 0 ; i < len; i++)
- output[outpos + i] = input[inpos + i];
- }
-
-
- private void keyBeanTransform( byte block[]) {
- long a = state[ 0 ], b = state[ 1 ], c = state[ 2 ], d = state[ 3 ];
- long [] x = new long [ 16 ];
- Decode(x, block, 64 );
-
- a = FF(a, b, c, d, x[0 ], S11, 0xd76aa478L);
- d = FF(d, a, b, c, x[1 ], S12, 0xe8c7b756L);
- c = FF(c, d, a, b, x[2 ], S13, 0x242070dbL);
- b = FF(b, c, d, a, x[3 ], S14, 0xc1bdceeeL);
- a = FF(a, b, c, d, x[4 ], S11, 0xf57c0fafL);
- d = FF(d, a, b, c, x[5 ], S12, 0x4787c62aL);
- c = FF(c, d, a, b, x[6 ], S13, 0xa8304613L);
- b = FF(b, c, d, a, x[7 ], S14, 0xfd469501L);
- a = FF(a, b, c, d, x[8 ], S11, 0x698098d8L);
- d = FF(d, a, b, c, x[9 ], S12, 0x8b44f7afL);
- c = FF(c, d, a, b, x[10 ], S13, 0xffff5bb1L);
- b = FF(b, c, d, a, x[11 ], S14, 0x895cd7beL);
- a = FF(a, b, c, d, x[12 ], S11, 0x6b901122L);
- d = FF(d, a, b, c, x[13 ], S12, 0xfd987193L);
- c = FF(c, d, a, b, x[14 ], S13, 0xa679438eL);
- b = FF(b, c, d, a, x[15 ], S14, 0x49b40821L);
-
- a = GG(a, b, c, d, x[1 ], S21, 0xf61e2562L);
- d = GG(d, a, b, c, x[6 ], S22, 0xc040b340L);
- c = GG(c, d, a, b, x[11 ], S23, 0x265e5a51L);
- b = GG(b, c, d, a, x[0 ], S24, 0xe9b6c7aaL);
- a = GG(a, b, c, d, x[5 ], S21, 0xd62f105dL);
- d = GG(d, a, b, c, x[10 ], S22, 0x2441453L);
- c = GG(c, d, a, b, x[15 ], S23, 0xd8a1e681L);
- b = GG(b, c, d, a, x[4 ], S24, 0xe7d3fbc8L);
- a = GG(a, b, c, d, x[9 ], S21, 0x21e1cde6L);
- d = GG(d, a, b, c, x[14 ], S22, 0xc33707d6L);
- c = GG(c, d, a, b, x[3 ], S23, 0xf4d50d87L);
- b = GG(b, c, d, a, x[8 ], S24, 0x455a14edL);
- a = GG(a, b, c, d, x[13 ], S21, 0xa9e3e905L);
- d = GG(d, a, b, c, x[2 ], S22, 0xfcefa3f8L);
- c = GG(c, d, a, b, x[7 ], S23, 0x676f02d9L);
- b = GG(b, c, d, a, x[12 ], S24, 0x8d2a4c8aL);
-
- a = HH(a, b, c, d, x[5 ], S31, 0xfffa3942L);
- d = HH(d, a, b, c, x[8 ], S32, 0x8771f681L);
- c = HH(c, d, a, b, x[11 ], S33, 0x6d9d6122L);
- b = HH(b, c, d, a, x[14 ], S34, 0xfde5380cL);
- a = HH(a, b, c, d, x[1 ], S31, 0xa4beea44L);
- d = HH(d, a, b, c, x[4 ], S32, 0x4bdecfa9L);
- c = HH(c, d, a, b, x[7 ], S33, 0xf6bb4b60L);
- b = HH(b, c, d, a, x[10 ], S34, 0xbebfbc70L);
- a = HH(a, b, c, d, x[13 ], S31, 0x289b7ec6L);
- d = HH(d, a, b, c, x[0 ], S32, 0xeaa127faL);
- c = HH(c, d, a, b, x[3 ], S33, 0xd4ef3085L);
- b = HH(b, c, d, a, x[6 ], S34, 0x4881d05L);
- a = HH(a, b, c, d, x[9 ], S31, 0xd9d4d039L);
- d = HH(d, a, b, c, x[12 ], S32, 0xe6db99e5L);
- c = HH(c, d, a, b, x[15 ], S33, 0x1fa27cf8L);
- b = HH(b, c, d, a, x[2 ], S34, 0xc4ac5665L);
-
- a = II(a, b, c, d, x[0 ], S41, 0xf4292244L);
- d = II(d, a, b, c, x[7 ], S42, 0x432aff97L);
- c = II(c, d, a, b, x[14 ], S43, 0xab9423a7L);
- b = II(b, c, d, a, x[5 ], S44, 0xfc93a039L);
- a = II(a, b, c, d, x[12 ], S41, 0x655b59c3L);
- d = II(d, a, b, c, x[3 ], S42, 0x8f0ccc92L);
- c = II(c, d, a, b, x[10 ], S43, 0xffeff47dL);
- b = II(b, c, d, a, x[1 ], S44, 0x85845dd1L);
- a = II(a, b, c, d, x[8 ], S41, 0x6fa87e4fL);
- d = II(d, a, b, c, x[15 ], S42, 0xfe2ce6e0L);
- c = II(c, d, a, b, x[6 ], S43, 0xa3014314L);
- b = II(b, c, d, a, x[13 ], S44, 0x4e0811a1L);
- a = II(a, b, c, d, x[4 ], S41, 0xf7537e82L);
- d = II(d, a, b, c, x[11 ], S42, 0xbd3af235L);
- c = II(c, d, a, b, x[2 ], S43, 0x2ad7d2bbL);
- b = II(b, c, d, a, x[9 ], S44, 0xeb86d391L);
- state[0 ] += a;
- state[1 ] += b;
- state[2 ] += c;
- state[3 ] += d;
- }
-
-
- private void Encode( byte [] output, long [] input, int len) {
- int i, j;
- for (i = 0 , j = 0 ; j < len; i++, j += 4 ) {
- output[j] = (byte ) (input[i] & 0xffL);
- output[j + 1 ] = ( byte ) ((input[i] >>> 8 ) & 0xffL);
- output[j + 2 ] = ( byte ) ((input[i] >>> 16 ) & 0xffL);
- output[j + 3 ] = ( byte ) ((input[i] >>> 24 ) & 0xffL);
- }
- }
-
-
- private void Decode( long [] output, byte [] input, int len) {
- int i, j;
-
- for (i = 0 , j = 0 ; j < len; i++, j += 4 )
- output[i] = b2iu(input[j]) | (b2iu(input[j + 1 ]) << 8 )
- | (b2iu(input[j + 2 ]) << 16 ) | (b2iu(input[j + 3 ]) << 24 );
- return ;
- }
-
-
- public static long b2iu( byte b) {
- return b < 0 ? b & 0x7F + 128 : b;
- }
-
-
- public static String byteHEX( byte ib) {
- char [] Digit = { '0' , '1' , '2' , '3' , '4' , '5' , '6' , '7' , '8' , '9' , 'A' ,
- 'B' , 'C' , 'D' , 'E' , 'F' };
- char [] ob = new char [ 2 ];
- ob[0 ] = Digit[(ib >>> 4 ) & 0X0F ];
- ob[1 ] = Digit[ib & 0X0F ];
- String s = new String(ob);
- return s;
- }
-
- public static void main(String args[]) {
-
- MD5_SRC m = new MD5_SRC();
- System.out.println("keyBean Test suite:" );
- System.out.println("keyBean(\"\"):" +m.getkeyBeanofStr( "" ));
- System.out.println("keyBean(\"a\"):" +m.getkeyBeanofStr( "a" ));
- System.out.println("keyBean(\"abc\"):" +m.getkeyBeanofStr( "abc" ));
- System.out.println("keyBean(\"message digest\"):" +m.getkeyBeanofStr( "message digest" ));
- System.out.println("keyBean(\"abcdefghijklmnopqrstuvwxyz\"):" +
- m.getkeyBeanofStr("abcdefghijklmnopqrstuvwxyz" ));
- System.out.println("keyBean(\"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789\"):" +
- m.getkeyBeanofStr("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789" ));
-
- }
- }