ServletContext/读取properties文件

ServletContext  被服务器共享

web应用关闭 tomcat关闭 web应用reload ServletContext被销毁

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获取ServletContext对象

ServletContext servletContext = this.getServletContext();

ServletContext servletContext2 = this.getServletConfig().getServletContext();

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设置ServletContext对象

servletContext2.setAttribute("name", "aaa");

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读取ServletContext对象

Object attribute =servletContext2.getAttribute("name");

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删除ServletContext对象

servletContext2.getAttribute("name");

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ServletContext对象读取properties文件

db.properties放在webRoot目录下

InputStream inputStream = this.getServletContext().getResourceAsStream("db.properties");

//创建properties

Properties properties = new Properties();

properties.load(inputStream);

properties.getProperty("name");

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ServletContext对象imgs下图片路径

String path=this.getServletContext().getRealPath("/imgs/s.jpg");

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文件放在src目录

InputStream inputStream=Servlet5.class.getClassLoader().getResourceAsStream("dbinfo.prop");