Java之MD5加密

import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
public class MD5Utils {
/**
* md5算法
*/
public static String md5(String plainText) {//MD5函数
byte[] secretBytes = null;
try {
secretBytes = MessageDigest.getInstance(“md5”).digest(
plainText.getBytes());
} catch (NoSuchAlgorithmException e) {
throw new RuntimeException(“md5异常”);
}
String md5code = new BigInteger(1, secretBytes).toString(16);// 16进制
// MD5加密
for (int i = 0; i < 32 - md5code.length(); i++) {
md5code = “0” + md5code;
}
return md5code;
}

public static void main(String[] args) {
	System.out.println(md5("123456"));//输出窗口输出123456的加密结果  
}

}