15 Servlet——ServletConfig
ServletConfig
ServletConfig是每个servlet单独的配置，同样地，它写在web.xml中，与它对应的是全局配置<Context-param>（服务器全局配置）。
在web.xml中配置
配置格式：
在需要配置的<servlet>标签中添加：
<init-param>
<param-name>config</param-name>
<param-value>configValue</param-value>
</init-param>
如：
<servlet>
<servlet-name>config</servlet-name>
<servlet-class>cn.xiaohei.servlet.ServletConfigServlet</servlet-class>
<init-param>
<param-name>config</param-name>
<param-value>configValue</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>config</servlet-name>
<url-pattern>/c</url-pattern>
</servlet-mapping>
获取ServletConfig
protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
//获取ServletConfig
ServletConfig sc = this.getServletConfig();
String config = sc.getInitParameter("config");
System.out.println(config);
}