筆記之_Java的jsp頁面全域變數

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servlet寫法：import java.util.HashMap;import java.util.Map;import javax.servlet.ServletContext;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;public class InitSystemVariableServlet extends HttpServlet {    private ServletContext  servletContext;    private   Map<String, Object>  allMap=new HashMap<String, Object>();    @Override    public void init() throws ServletException {        servletContext= super.getServletContext();  //全域的application        allMap.put("systemTitle", "後台管理系統");        allMap.put("systemName", "教務管理系統");        //只要是頁面用的往裡面加        servletContext.setAttribute("baseMap", allMap);    }}web.xml配置：<servlet>    <servlet-name>BaseApplication</servlet-name>    <servlet-class>com.wisezone.controller.InitSystemVariableServlet</servlet-class>    <load-on-startup>3</load-on-startup></servlet>取值直接用el運算式：<title>${baseMap["systemTitle"] }</title>Freemarker數字超過3位會格式化，取消格式化用：<input type="text" value="${salary?string(‘#.00‘)}" name="salary"  />

 

筆記之_Java的jsp頁面全域變數