JDBC给我参数索引超出范围（1>参数数量为0）

Question

在下面标记的行上获取错误。有任何想法吗？

  ... 
      int hash = ConsistantHash.hash(name); 
      query = "INSERT INTO `server_info` (`host`, `port, `s_port`, `name`, `hash`) VALUES (?, ?, ?, ?, ?)"; 

      statement = connection.prepareStatement(query, Statement.RETURN_GENERATED_KEYS); 
      statement.setString(1, host); //this line 
      statement.setInt(2, c_port); 
      statement.setInt(3, s_port); 
      statement.setString(4, name); 
      statement.setInt(5, hash); 

      statement.executeUpdate(); 
      statement.close(); 

Answer 1

你缺少端口列的匹配逃生：

`port 

应该

`port`