freemarker 入门教程（servlet 容器）

墨蓝 2022-09-29 14:57 189阅读 0赞

第一步：在eclipse中新建javaWeb工程
    第二步：添加依赖jar：freemarker-2.3.16.jar
    第三步：在web.xml中添加freemarker 的servlet配置
    <servlet>
        <servlet-name>freemarker</servlet-name>
        <servlet-class>freemarker.ext.servlet.FreemarkerServlet</servlet-class>
        <init-param>  
            <param-name>TemplatePath</param-name>  
            <param-value>/</param-value>  
        </init-param> 
        <init-param>  
            <param-name>NoCache</param-name>  
            <param-value>true</param-value>  
        </init-param>  
        <init-param>
            <param-name>ContentType</param-name>
            <param-value>text/html;charset=UTF-8</param-value>
        </init-param>
        <init-param>
            <param-name>template_update_delay</param-name>
            <param-value>0</param-value>
        </init-param>
        <init-param>
            <param-name>default_encoding</param-name>
            <param-value>UTF-8</param-value>
        </init-param>
        <init-param>  
            <param-name>number_format</param-name>  
            <param-value>0.##########</param-value>  
        </init-param>  
      </servlet>
      <servlet-mapping>
        <servlet-name>freemarker</servlet-name>
        <url-pattern>*.ftl</url-pattern>
      </servlet-mapping>
      第四步：新建servlet，并编写测试代码：
      package cn.zhangheng.filter;
    
    import java.util.ArrayList;
    import java.util.List;
    
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    /** * Servlet implementation class LoginServlet */
    public class LoginServlet extends HttpServlet { 
        private static final long serialVersionUID = 1L;
    
        /** * @see HttpServlet#HttpServlet() */
        public LoginServlet() {
        }
    
        /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse * response) */
        protected void doGet(HttpServletRequest request, HttpServletResponse response){
            List<String> l = new ArrayList<String>();
            l.add("hello");
            l.add("freemarker");
            request.setAttribute("list", l);
            try {
                request.getRequestDispatcher("/demo.ftl").forward(request, response);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    
        /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse * response) */
        protected void doPost(HttpServletRequest request, HttpServletResponse response) {
            // TODO Auto-generated method stub
            doGet(request, response);
        }
    
    }
    第五步：在index.ftl中循环数据
    <#list list as l>
    ${l}
    </#list>