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：

1 import org.apache.velocity.Template;
2 import org.apache.velocity.VelocityContext;
3 import org.apache.velocity.app.Velocity;
4 import org.apache.velocity.app.VelocityEngine;
5 import org.apache.velocity.tools.generic.DateTool;
6 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：

 1 /**
 2      * 生成vm
 3      * @param vmpackage vm所在的包名  
 4      * @param vmname
 5      * @param listname
 6      * @param objects
 7      * @return
 8      * @throws Exception
 9      */
10     public static String generateVm(String vmpackage, String vmname, String listname, List<? extends Object> objects) throws Exception{
11         if(objects.size()>0){
12             Properties p = new Properties(); 
13             String classpath = VelocityUtils.class.getResource("/").getPath();//取得src的路径
14             p.setProperty(VelocityEngine.FILE_RESOURCE_LOADER_PATH, classpath + vmpackage);
15             //设置velocity的编码 
16             p.setProperty(Velocity.ENCODING_DEFAULT, "UTF-8"); 
17             p.setProperty(Velocity.INPUT_ENCODING, "UTF-8"); 
18             p.setProperty(Velocity.OUTPUT_ENCODING, "UTF-8"); 
19             //初始化并取得Velocity引擎
20             VelocityEngine ve = new VelocityEngine();
21             ve.init(p);
22             //取得velocity的模版
23             Template t = null;
24             t = ve.getTemplate(vmname);
25             //取得velocity的上下文context 
26             VelocityContext context = new VelocityContext();
27             context.put("number", new NumberTool());
28             context.put("date", new DateTool());
29             context.put(listname, objects);
30             //输出流 
31             StringWriter writer = new StringWriter();
32             //转换输出 
33             t.merge(context, writer); 
34             return writer.toString();
35         }else{
36             return null;
37         }
38     }

上面函数调用：

1 String vmpagckage = "com/cpinfo/his/template/emr/";
2             String vmname = "partogram_detail_infos.vm";
3             String vm = VelocityUtils.generateGridVm(vmpagckage, vmname, "bs", ems);
4             
5             response.setContentType("text/xml;charset=utf-8");
6             PrintWriter pw = response.getWriter();
7             pw.print(vm);
8             pw.flush();
9             pw.close();

模版文件的内容例子：

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <rows>
 3     #foreach($b in $bs)
 4     <row id="$b.detailinfoid">
 5         <cell title="$!date.format('yyyy-MM-dd HH:mm',$b.time)">$!date.format('HH:mm',$b.time)</cell>
 6         <cell>$!number.format($b.gongkoukaida)</cell>
 7         <cell>$!number.format($b.xianluxiajiang)</cell>
 8         #if($b.taiermianchu==1)
 9         <cell>是</cell>
10         #else
11         <cell>否</cell>
12         #end
13         <cell>$!b.taixinyin</cell>
14         <cell>$!b.mailv</cell>
15         #if($b.xueyagao || $b.xueyadi)
16         <cell>$!b.xueyagao/$!b.xueyadi</cell>
17         #else
18         <cell></cell>
19         #end
20         <cell>$!b.teshuzhiliao</cell>
21         <cell>$!b.qianming</cell>
22         <cell><![CDATA[<img src="img/emr/del_package.png" alt="删除" style="cursor:pointer;" onclick="javascript:delDetailInfo('$!b.detailinfoid')"/>]]></cell>
23     </row>
24     #end
25 </rows>

模版文件的语法等可以去官网看文档。