code: public static Map<String, String> getModulusAndKeys() {
  
  		Map<String, String> map = new HashMap<String, String>();
  
  		try {
  			InputStream in = RSAUtils.class.getResourceAsStream("/rsa.properties");
  			Properties prop = new Properties();
  			prop.load(in);
  
  			String modulus = prop.getProperty("modulus");
  			String publicKey = prop.getProperty("publicKey");
  			String privateKey = prop.getProperty("privateKey");
  
  			in.close();
  
  			map.put("modulus", modulus);
  			map.put("publicKey", publicKey);
  			map.put("privateKey", privateKey);
  
  		} catch (IOException e) {
  			e.printStackTrace();
  		}
  		return map;
  	}
docs: 获取模数和密钥
  
  @return