Des3加密解密

實測  沒問題

package cn.com.test;


import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;




public class Des3 {
    private static final String Algorithm = new String("DESede"); //算法標識
    private SecretKey deskey; //密鑰


    public Des3() throws Exception {
        KeyGenerator keygen = KeyGenerator.getInstance(Algorithm);
        deskey = keygen.generateKey();
    }


    public Des3(byte[] key) throws Exception {
        if (key == null) {
            throw new Exception("input key can not null");
        }
        if (key.length != 24) {
            throw new Exception("key length is error, key length must 24 bytes");
        }


        SecretKeySpec destmp = new SecretKeySpec(key, Algorithm);
        deskey = destmp;
    }


    public byte[] getKey() {
        return deskey.getEncoded();
    }


    /**
     * 加密數據
     * @param data byte[]
     * @return byte[]
     */
    public byte[] encrypt(byte[] data) throws Exception {
        Cipher c1 = Cipher.getInstance(Algorithm);
        c1.init(Cipher.ENCRYPT_MODE, deskey);
        return c1.doFinal(data);


    }


    /**
     * 解密數據
     * @param data byte[]
     * @return byte[]
     */
    public byte[] decrypt(byte[] data) throws Exception {
        Cipher c1 = Cipher.getInstance(Algorithm);
        c1.init(Cipher.DECRYPT_MODE, deskey);
        return c1.doFinal(data);
    }
}

package cn.com.test;




import com.ibm.misc.BASE64Decoder;
import com.ibm.misc.BASE64Encoder;


public class Des3Util {
public static String decryptBy3Des(String encryptStr, String key) throws Exception {


Des3 des = new Des3(key.getBytes());
BASE64Decoder base64decoder = new BASE64Decoder();
byte[] encryptBytes = base64decoder.decodeBuffer(encryptStr);
byte[] decryptBytes = des.decrypt(encryptBytes);
return new String(decryptBytes,"UTF-8");
}
public static String encryptBy3Des(String str, String key) throws Exception {
Des3 des = new Des3(key.getBytes());
byte[] encryptBytes=des.encrypt(str.getBytes("UTF-8"));
BASE64Encoder  base64encoder=new BASE64Encoder();
String dd=    base64encoder.encode(encryptBytes);;
return dd;
}


}


測試類

package cn.com.test;


import java.util.HashMap;
import java.util.Map;


import com.alibaba.fastjson.JSON;


public class JiamiTest {
public static void main(String[] args) throws Exception {

Map<String,String> jiamimap=new HashMap<String, String>();
jiamimap.put("birthday","2016-01-08");
jiamimap.put("card","12345689522");
jiamimap.put("cardType","4");
jiamimap.put("community_id","1");
jiamimap.put("community_name","通常社康");
jiamimap.put("dept_id","223");
jiamimap.put("dept_name","骨科");
jiamimap.put("doctor_name","張三");
jiamimap.put("phone","12345678944");
jiamimap.put("querytime","xxxxxx");
jiamimap.put("return_url","xxxx");
jiamimap.put("sex","女");
jiamimap.put("token","4028800b51e760b40151e781bb44004b");
jiamimap.put("truename","張四");
jiamimap.put("user","shekang");
String json =JSON.toJSONString(jiamimap);
    String a=Des3Util.encryptBy3Des(json, "abcabcabcabcabcabcabcabc");
    System.out.println("加密後的字符串++++++++++"+a);
    String b=Des3Util.decryptBy3Des(a, "abcabcabcabcabcabcabcabc");
    System.out.println("解密後的字符串——————————"+b);

   }


}