Password, file MD5 encryption, password sha256, sha384, sha512hex, and so on

Package encryption; import Java. io. fileinputstream; import Java. io. fileoutputstream; import Java. io. outputstream; import Java. io. unsupportedencodingexception; import Java. security. messagedigest; import Java. util. arrays; import Org. apache. commons. codec. binary. base64outputstream; import Org. apache. commons. codec. digest. digestutils; import Org. apache. commons. codec. digest. messagedigestalgorithms; import sun. misc. Base64decoder; import sun. misc. base64encoder;/*** encryption tool class * @ author wangzg * @ date 2014-7-25 * @ need commons-codec -*. *. jar */public class encryption {/*** @ title: Main * @ Description: * @ Param: * @ return void * @ User: wangzg * @ Date: 2014-7-25 * @ throws */public static void main (string [] ARGs) {string strsource = "admin"; string STR = getmd5 (strsource); system. out. println (strsource + ", Length:" + Str. l Ength () + ", MD5:" + Str); STR = getsha1 (strsource); system. out. println (strsource + ", Length:" + Str. length () + ", sha1:" + Str); STR = getsha256 (strsource); system. out. println (strsource + ", Length:" + Str. length () + ", sha256:" + Str); STR = getsha384 (strsource); system. out. println (strsource + ", Length:" + Str. length () + ", sha384:" + Str); STR = getsha512 (strsource); system. out. println (strsource + ", Length:" + Str. length () + ", sha51 2: "+ Str); digestfile (" Doc \ 1.txt", messagedigestalgorithms. MD5); string target = getbase64 (strsource); system. out. println (strsource); system. out. println (target); system. out. println (getfrombase64 (target);}/*** MD5 encryption, returns a 32-bit hexadecimal string * @ title: getmd5 * @ Description: * @ Param: * @ return string * @ User: wangzg * @ Date: 2014-7-25 * @ throws */public static string getmd5 (string source) {return digestutils. MD 5hex (source);}/*** sha1 encryption, returns a 40-bit hexadecimal string * @ title: getsha1 * @ Description: * @ Param: * @ return string * @ User: wangzg * @ Date: 2014-7-25 * @ throws */public static string getsha1 (string source) {return digestutils. sha1hex (source);}/*** sha256 encryption, returns a 64-bit hexadecimal string * @ title: getsha256 * @ Description: * @ Param: * @ return string * @ User: wangzg * @ Date: 2014-7-25 * @ throws */public static string getsha256 (strin G source) {return digestutils. sha256hex (source);}/*** sha384 encryption, return a 96-bit hexadecimal string * @ title: getsha384 * @ Description: * @ Param: * @ return string * @ User: wangzg * @ Date: 2014-7-25 * @ throws */public static string getsha384 (string source) {return digestutils. sha384hex (source);}/*** sha512 encryption, returns the 128-bit hexadecimal string * @ title: getsha512 * @ Description: * @ Param: * @ return string * @ User: wangzg * @ Date: 2014-7-25 * @ th Rows */public static string getsha512 (string source) {return digestutils. sha512hex (source);}/*** file encryption * @ title: digestfile * @ Description: * @ Param: Filename: Encrypted File, algorithm: encryption Algorithm * @ return void * @ User: wangzg * @ Date: 2014-7-25 * @ throws */public static void digestfile (string filename, string algorithm) {byte [] B = new byte [1024*4]; int Len = 0; fileinputstream FCM = NULL; fileoutputstream Fos = NULL; try {messagedigest MD = messagedigest. getinstance (algorithm); FCM = new fileinputstream (filename); While (LEN = Fi. Read (B ))! =-1) {Md. update (B, 0, Len);} byte [] digest = md. digest (); // system. out. println (arrays. tostring (Digest); stringbuffer filenamebuffer = new stringbuffer (128 ). append (filename ). append (". "). append (algorithm); Fos = new fileoutputstream (filenamebuffer. tostring (); outputstream encodedstream = new base64outputstream (FOS); encodedstream. write (Digest); encodedstream. flush (); encodedstream. close ();} Cat CH (exception e) {system. Out. println ("error computing Digest:" + E) ;}finally {try {If (FS! = NULL) FCM. Close (); If (FOS! = NULL) FOS. close ();} catch (exception ignored) {}}/*** base64 encryption * @ title: getbase64 * @ Description: * @ Param: * @ return string * @ User: wangzg * @ Date: 2014-7-25 * @ throws */public static string getbase64 (string Str) {byte [] B = NULL; string S = NULL; try {B = Str. getbytes ("UTF-8");} catch (unsupportedencodingexception e) {e. printstacktrace ();} If (B! = NULL) {S = new base64encoder (). encode (B);} return s;}/*** base64 decryption * @ title: getfrombase64 * @ Description: * @ Param: * @ return string * @ User: wangzg * @ Date: 2014-7-25 * @ throws */public static string getfrombase64 (string s) {byte [] B = NULL; string result = NULL; If (s! = NULL) {base64decoder decoder = new base64decoder (); try {B = decoder. decodebuffer (s); Result = new string (B, "UTF-8");} catch (exception e) {e. printstacktrace () ;}} return result ;}}