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Servlet初始化參數ServletConfig |
上下文初始化參數ServletContext |
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Web.xm配置 |
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<servlet> <servlet-name>BeerSelect</servlet> <servlet-class>Test</servlet-class>
<init-param> <param-name>emai</param-name> <param-value>[email protected]</param-value> </init-param> </servlet> <servlet-mapping> <servlet-name> BeerSelect </servlet-name> <url-pattern>/Test </url-pattern> </servlet-mapping> servlet初始化參數不能程序修改 |
<servlet> <servlet- <servlet-class>Test</servlet-class> </servlet>
<context-param> <param-name>email</param-name> <param-value>[email protected]</param-value> </context-param> 上下文參數不能程序修改 |
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在servlet中的獲取參數方法 |
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out.println(getServletConfig().getInitParameter(“emai”)); |
out.println(getServletContext().getInitParameter(“emai”)); |
上下文屬性
getSelvletContext().setAttribute(String name,Object value);//設置屬性
getSelvletContext().getAttribute(String name);//獲得屬性，不要忘了必須強制轉換，因爲返回類型是Object。