自己写好工具类(直接使用),不用引入额外的jar包;
package cn.com.txlian.utils;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
public class MD5 {
public static String encode(String plainText){
try {
if(plainText != null){
MessageDigest md = MessageDigest.getInstance("MD5");
md.update(plainText.getBytes());
byte b[] = md.digest();
int i;
StringBuffer buf = new StringBuffer("");
for(int offset=0;offset<b.length;offset++){
i = b[offset];
if(i<0) i += 256;
if(i<16) buf.append("0");
buf.append(Integer.toHexString(i));
}
return buf.toString();
}
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
return null;
}
}