java中加密的实现方法（MD5，MD2，SHA）

import java.security.MessageDigest;  import javax.xml.bind.annotation.adapters.HexBinaryAdapter;  public class Main {    static String src = "Hello,sahadev!";    public static void main(String[] args) {     MD5();     MD2();     SHA();   }    /**    * MD5加密    */   public static void MD5() {     try {       // 获取MD5加密工具       MessageDigest md = MessageDigest.getInstance("MD5");       // 加密       byte[] digest = md.digest(src.getBytes());       // 获取二进制十六进制互转工具       HexBinaryAdapter hexBinaryAdapter = new HexBinaryAdapter();       // 将二进制数组转换为十六进制字符串       String marshal = hexBinaryAdapter.marshal(digest);       // 输出结果       System.out.println(marshal);     } catch (Exception e) {       e.printStackTrace();     }   }    /**    * MD2加密    */   public static void MD2() {     try {       // 获取MD2加密工具       MessageDigest md = MessageDigest.getInstance("MD2");       // 加密       byte[] digest = md.digest(src.getBytes());       // 获取二进制十六进制互转工具       HexBinaryAdapter hexBinaryAdapter = new HexBinaryAdapter();       // 将二进制数组转换为十六进制字符串       String marshal = hexBinaryAdapter.marshal(digest);       // 输出结果       System.out.println(marshal);     } catch (Exception e) {       e.printStackTrace();     }   }    public static void SHA() {     try {       // 获取MD2加密工具       MessageDigest md = MessageDigest.getInstance("SHA");       // 加密       byte[] digest = md.digest(src.getBytes());       // 获取二进制十六进制互转工具       HexBinaryAdapter hexBinaryAdapter = new HexBinaryAdapter();       // 将二进制数组转换为十六进制字符串       String marshal = hexBinaryAdapter.marshal(digest);       // 输出结果       System.out.println(marshal);     } catch (Exception e) {       e.printStackTrace();     }   }  } 

MD5 : 8FC69C57ACC2258C7B4A9D39DC4C940B MD2 : 9EAF08289903A29C3C58D2AAA25BD83D SHA : 1B1330BFC6257FC9F4B4ED5CB605FA4109608CCA