摘要:
java.lang.IllegalStateException: Invalid use of BasicClientConnManager: connection still allocated.Make sure to release the connection before allocati 阅读全文
摘要:
一.单一职责原则 Single Responsibility Principle, 简称SRP。 定义:There should never be more than one reason for a class to change. 应该有且仅有一个原因引起类的变更。 职责的划分?单一的定义和级别 阅读全文