Remove Setting Method

《重构——改善既有代码的设计》10.10 p300

可能受到Hibernate和spring的影响,一直都以为set方法是理所当然,也是非常必要的。但是有时候想一下,set方法也存在着一些不合理的地方。我在使用一个类的时候何时给他设置值?都有哪些值需要去设定?该调用哪个设置函数?诸如此类的东西会我们的类带来混淆。

所以,个人认为编写某个类的时候为其提供功能完善的构造函数或者是具有特定含义的初始化的函数。

12-Jul-2023 18:36:28.896 SEVERE [localhost-startStop-1] org.apache.catalina.core.StandardContext.startInternal One or more listeners failed to start. Full details will be found in the appropriate container log file 12-Jul-2023 18:36:28.898 SEVERE [localhost-startStop-1] org.apache.catalina.core.StandardContext.startInternal Context [/setting] startup failed due to previous errors 2023-07-12 18:36:28,899 [// - - ] INFO org.springframework.web.context.support.XmlWebApplicationContext - Closing Root WebApplicationContext: startup date [Wed Jul 12 18:36:27 CST 2023]; root of context hierarchy 2023-07-12 18:36:28,900 [// - - ] INFO org.springframework.cache.ehcache.EhCacheManagerFactoryBean - Shutting down EhCache CacheManager 12-Jul-2023 18:36:28.908 WARNING [localhost-startStop-1] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesJdbc The web application [setting] registered the JDBC driver [com.mysql.jdbc.Driver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered. 12-Jul-2023 18:36:28.908 WARNING [localhost-startStop-1] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesThreads The web application [setting] appears to have started a thread named [Abandoned connection cleanup thread] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread: java.lang.Object.wait(Native Method) java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143) com.mysql.jdbc.AbandonedConnectionCleanupThread.run(AbandonedConnectionCleanupThread.java:40)
07-13
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