web.xml:
<context-param>
<param-name>context-param</param-name>
<param-value>context-value</param-value>
</context-param>
获取方式：
ServletContext servletContext = this.getServletContext();
servletContext.getAttribute("name");
System.out.println(servletContext.getAttribute("name"));
转载于:https://www.cnblogs.com/yuanchaoyong/p/7670902.html
