db unittest completed(annotations added to be compatible with go version's json)

src/main/java/minsecurity/crypto/sm2/SM2PrivateKey.java

@@ -59,6 +59,7 @@ public class SM2PrivateKey implements PrivateKeyInterface {
 
     @Override
     public boolean setBytes(byte[] d) {
+        // TODO 待与go版本进行兼容 目前版本无法使用
         if(d.length != 32 && d.length != 33)
             return false;
         privateKey = new ECPrivateKeyParameters(new BigInteger(d), SM2Base.DOMAIN_PARAMS);