加密解密算法java实现(4)—MD5

import java.security.MessageDigest;  
  
public class MD5Util {  
    /***  
     * MD5加码 生成32位md5码  
     * @throws Exception 
     */  
    public static String string2MD5(String inStr) throws Exception{  
        MessageDigest md5 = null;  
        md5 = MessageDigest.getInstance("MD5");  
        char[] charArray = inStr.toCharArray();  
        byte[] byteArray = new byte[charArray.length];  
  
        for (int i = 0; i < charArray.length; i++)  
            byteArray[i] = (byte) charArray[i];  
        byte[] md5Bytes = md5.digest(byteArray);  
        StringBuffer hexValue = new StringBuffer();  
        for (int i = 0; i < md5Bytes.length; i++){  
            int val = ((int) md5Bytes[i]) & 0xff;  
            if (val < 16)  
                hexValue.append("0");  
            hexValue.append(Integer.toHexString(val));  
        }  
        return hexValue.toString();  
    }  
      
    /** 
     * 示例 
     * @param args 
     * @throws Exception 
     */  
    public static void main(String[] args) throws Exception {  
        String source = "12dfefDKLJKLKL464d中文f465as43f1a3 f46e353D1F34&*^$E65F46EF43456abcd54as56f00ef";  
        String result = MD5Util.string2MD5(source);  
        System.out.println("加密结果：\n" + result);  
    }  
}