22_md5加密密码

一、md5加密的工具类

public class MD5Utils {
/**
* md5加密的工具方法
* @param password
* @return
*/
public static String encode(String password){
try {
MessageDigest digest = MessageDigest.getInstance("md5");
byte[] result = digest.digest(password.getBytes());
StringBuilder sb = new StringBuilder();
//16进制的方式  把结果集byte数组 打印出来
for(byte b :result){
int number = (b&0xff);     //加盐.   int number = (b&0xff)+2;
String str =Integer.toHexString(number);
if(str.length()==1){
sb.append("0");
}
sb.append(str);
}
return sb.toString();
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
return "";
}
}

}