Velocity模版使用

<!-- https://mvnrepository.com/artifact/org.apache.velocity/velocity -->
<dependency>
    <groupId>org.apache.velocity</groupId>
    <artifactId>velocity</artifactId>
    <version>1.7</version>
</dependency>

http://mvnrepository.com/artifact/org.apache.velocity

<!-- https://mvnrepository.com/artifact/org.apache.velocity/velocity-tools -->
<dependency>
    <groupId>org.apache.velocity</groupId>
    <artifactId>velocity-tools</artifactId>
    <version>2.0</version>
</dependency>

引入的jar包：

 import org.apache.velocity.Template;
 import org.apache.velocity.VelocityContext;
 import org.apache.velocity.app.Velocity;
 import org.apache.velocity.app.VelocityEngine;
 import org.apache.velocity.tools.generic.DateTool;
 import org.apache.velocity.tools.generic.NumberTool;

jar包可以去官网下载

http://velocity.apache.org/engine/devel/

样例代码：

 /**
      * 生成vm
      * @param vmpackage vm所在的包名
      * @param vmname
      * @param listname
      * @param objects
      * @return
      * @throws Exception
      */
     public static String generateVm(String vmpackage, String vmname, String listname, List<? extends Object> objects) throws Exception{
         if(objects.size()>0){
             Properties p = new Properties();
             String classpath = VelocityUtils.class.getResource("/").getPath();//取得src的路径
             p.setProperty(VelocityEngine.FILE_RESOURCE_LOADER_PATH, classpath + vmpackage);
             //设置velocity的编码
             p.setProperty(Velocity.ENCODING_DEFAULT, "UTF-8");
             p.setProperty(Velocity.INPUT_ENCODING, "UTF-8");
             p.setProperty(Velocity.OUTPUT_ENCODING, "UTF-8");
             //初始化并取得Velocity引擎
             VelocityEngine ve = new VelocityEngine();
             ve.init(p);
             //取得velocity的模版
             Template t = null;
             t = ve.getTemplate(vmname);
             //取得velocity的上下文context
             VelocityContext context = new VelocityContext();
             context.put("number", new NumberTool());
             context.put("date", new DateTool());
             context.put(listname, objects);
             //输出流
             StringWriter writer = new StringWriter();
             //转换输出
             t.merge(context, writer);
             return writer.toString();
         }else{
             return null;
         }
     }

上面函数调用：

 String vmpagckage = "com/cpinfo/his/template/emr/";
             String vmname = "partogram_detail_infos.vm";
             String vm = VelocityUtils.generateGridVm(vmpagckage, vmname, "bs", ems);

             response.setContentType("text/xml;charset=utf-8");
             PrintWriter pw = response.getWriter();
             pw.print(vm);
             pw.flush();
             pw.close();

模版文件的内容例子：

 <?xml version="1.0" encoding="UTF-8"?>
 <rows>
     #foreach($b in $bs)
     <row id="$b.detailinfoid">
         <cell title="$!date.format('yyyy-MM-dd HH:mm',$b.time)">$!date.format('HH:mm',$b.time)</cell>
         <cell>$!number.format($b.gongkoukaida)</cell>
         <cell>$!number.format($b.xianluxiajiang)</cell>
         #if($b.taiermianchu==1)
         <cell>是</cell>
         #else
         <cell>否</cell>
         #end
         <cell>$!b.taixinyin</cell>
         <cell>$!b.mailv</cell>
         #if($b.xueyagao || $b.xueyadi)
         <cell>$!b.xueyagao/$!b.xueyadi</cell>
         #else
         <cell></cell>
         #end
         <cell>$!b.teshuzhiliao</cell>
         <cell>$!b.qianming</cell>
         <cell><![CDATA[<img src="img/emr/del_package.png" alt="删除" style="cursor:pointer;" onclick="javascript:delDetailInfo('$!b.detailinfoid')"/>]]></cell>
     </row>
     #end
 </rows>

模版文件的语法 等可以去官网看文档。