静态化-VeloCity

1.在spring.xml中配置

     <!-- 指定vm模版路径 start  -->
     <bean id="velocityEngine" class="org.springframework.ui.velocity.VelocityEngineFactoryBean">
         <property name="resourceLoaderPath" value="/WEB-INF/"/>
         <property name="preferFileSystemAccess" value="true"/>
         <property name="velocityProperties">
             <props>
                 <prop key="input.encoding">UTF-8</prop>
                 <prop key="output.encoding">UTF-8</prop>
                 <prop key="default.contentType">text/html;charset=UTF-8</prop>
             </props>
         </property>
     </bean>
      <!-- 指定vm模版路径 end  -->

2.java方法

@Autowired
@Qualifier("velocityEngine")
private VelocityEngine velocityEngine;

@RequestMapping(value = "/vm", method = RequestMethod.GET)

     public void createHeader(HttpServletRequest request, HttpServletResponse response, String type) throws Exception {
         try {
             // 静态页生成路径
             String path1 = request.getSession().getServletContext().getRealPath("/") + "index/template/include/";
             createPath(path1);
             String path = path1+"header.jsp";
             // css路径
             String csspath = getPath(request);
             //velocityEngine.setProperty("resourceLoaderPath", "/WEB-INF/velocity/");
             Template tl = velocityEngine.getTemplate("./index.vm", "UTF-8");
             VelocityContext vc = new VelocityContext();
             //数据封装start
             vc.put("csspath", csspath);
             vc.put("tag", 12);
             vc.put("isnull", "");
             vc.put("bool", false);
             List l=new ArrayList();
             l.add("a");
             l.add("b");
             l.add("c");
             l.add("d");
             l.add("e");
             vc.put("list", l);
             SysNew s = new SysNew();
             s.setContents("contents");
             s.setEvents("eve");
             vc.put("sys", s);
             //数据封装end
             vc.put("charset","<%@ page language='java' import='java.util.*' pageEncoding='UTF-8'%>");
             BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(path), "UTF-8"));
             tl.merge(vc, bw);

             //直接生成html代码不生成--发模版邮件使用star
             //StringWriter sw = new StringWriter();
             //tl.merge(vc, sw);
             //response.getWriter().print(sw.toString());
             //直接生成html代码不生成--发模版邮件使用end
             bw.close();

         } catch (Exception e) {
             System.out.println(e.getMessage() + "-----------------------");
         }
     }

3.在WEB-INF下创建模版index.vm,内容如下，我整理了常用的标签在模版中

$charset##去掉这个当前页面中文乱码
.变量的调用，后台存入“csspath”，前台
$csspath</br>${csspath}<br />
.if判断</br>
#if($tag == )
    等于1
#else
    不等于1
#end
<br/>
.判断是否为空<br/>
#if($isnull)
    变量为空
#else
    变量不为空
#end
<br/>
.判断true OR false  <br/>
#if($bool)
    true
#else
    false
#end
<br/>
.注释：两个“#”注释单行，“#**#”注释代码块
<br/>
.循环<br/>
#foreach($lis in $list)
    $lis -- $velocityCount ##当前循环下标
#end
<br/>
.定义变量
#set ($bianliang="bianliang")
$bianliang
<br/>
.调用对象中的值,和jsp中类似<br>
$sys.events
$sys.Contents
<br/>
.引用模版<br/>
主要用于处理具有相同内容的页面，比如每个网站的顶部或尾部内容。
如：##parse("/blog/top.html")或#include("/blog/top.html")
parse与include的区别在于，若包含的文件中有Velocity脚本标签，将会进一步解析，而include将原样显示。
##inclue("模板文件名")或#parse("模板文件名")
<br/>

4.引用jar

velocity-1.7.jar