密码、文件MD5加密，密码sha256、sha384、sha512Hex等加密

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;/** * 加密工具类 * @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.length()+",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()+",Sha512:"+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加密,返回32位十六进制字符串 * @Title: getMD5 * @Description: * @param： * @return String  * @user： wangzg * @Date：2014-7-25 * @throws */public static String getMd5(String source){return DigestUtils.md5Hex(source);}/** * sha1加密,返回40位十六进制字符串 * @Title: getSha1 * @Description: * @param： * @return String  * @user： wangzg * @Date：2014-7-25 * @throws */public static String getSha1(String source){return DigestUtils.sha1Hex(source);}/** * sha256加密,返回64位十六进制字符串 * @Title: getSha256 * @Description: * @param： * @return String  * @user： wangzg * @Date：2014-7-25 * @throws */public static String getSha256(String source){return DigestUtils.sha256Hex(source);}/** * sha384加密,返回96位十六进制字符串 * @Title: getSha384 * @Description: * @param： * @return String  * @user： wangzg * @Date：2014-7-25 * @throws */public static String getSha384(String source){return DigestUtils.sha384Hex(source);}/** * sha512加密,返回128位十六进制字符串 * @Title: getSha512 * @Description: * @param： * @return String  * @user： wangzg * @Date：2014-7-25 * @throws */public static String getSha512(String source){return DigestUtils.sha512Hex(source);}/** * 文件加密 * @Title: digestFile * @Description: * @param：filename:加密文件,algorithm:加密算法 * @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 fis = null;          FileOutputStream fos = null;          try {              MessageDigest md = MessageDigest.getInstance(algorithm);              fis = new FileInputStream(filename);              while ((len = fis.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();         } catch (Exception e) {              System.out.println("Error computing Digest: " + e);          } finally {              try {                  if (fis != null)                      fis.close();                  if (fos != null)                      fos.close();              } catch (Exception ignored) {              }          }      }  /** * Base64加密 * @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解密 * @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;}}