HMACSHA256加密

依靠bouncycastle jar实现HMACSHA256加密
在pom.xml添加

<dependency>
        <groupId>org.bouncycastle</groupId>
        <artifactId>bcpkix-jdk15on</artifactId>
        <version>1.49</version>
</dependency>

Demo

import java.io.IOException;
import java.security.Security;
import javax.crypto.Mac;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import javax.xml.bind.annotation.adapters.HexBinaryAdapter;

import org.apache.http.ParseException;
import org.bouncycastle.crypto.RuntimeCryptoException;
import org.bouncycastle.jce.provider.BouncyCastleProvider;

public class HMACSHA256 {
    /**
     * 
     * @param content 加密内容
     * @param secret  加密key
     * @return
     */
    public static String encrytSHA256(String content, String secret) {

        try {
            Security.addProvider(new BouncyCastleProvider());
            SecretKey secretKey = new SecretKeySpec(secret.getBytes("UTF8"), "HmacSHA256");
            Mac mac = Mac.getInstance(secretKey.getAlgorithm());
            mac.init(secretKey);
            byte[] digest = mac.doFinal(content.getBytes("UTF-8"));
            return new HexBinaryAdapter().marshal(digest).toLowerCase();
            // .toLowerCase()小写
            // .toUpperCase();大写
        } catch (Exception e) {
            throw new RuntimeCryptoException("加密异常");
        }

    }

    public static void main(String[] args) throws ParseException, IOException {
        System.out.println(encrytSHA256("加密内容", "key"));
    }


}