code: public boolean signVerify(byte[] content,byte[] sign,PublicKey pubKey)  
      {  
          try   
          {  
              java.security.Signature signature = java.security.Signature.getInstance(SIGN_ALGORITHMS);  
              signature.initVerify(pubKey);  
              signature.update(content);  
              return signature.verify(sign);  
          }catch (Exception e)   
          {  
              log.error(e.getMessage(),e);
          }  
          return false;  
      }
docs: RSA验签名检查
  @param content 待签名数据
  @param sign 签名值
  @param publicKey 分配给开发商公钥
  @return 布尔值