本文是【条件语句】demo

java

/**
     * 条件语句
     */
    @Test
    public void test5() throws IOException {

        //1 加载配置
        Properties properties = new Properties();
        properties.load(Test.class.getClassLoader().getResourceAsStream("velocity.properties"));
        Velocity.init(properties);

        //2 创建上下文对象
        VelocityContext context = new VelocityContext();

        //2 将数据对象添加到此上下文中
        context.put("list", Arrays.asList("a", "b", "c", "d"));

        //4选择模板
        Template template = Velocity.getTemplate("./src/test/resources/template/if.vm");

        //5 合并模板和数据并输出
        StringWriter sw = new StringWriter();
        template.merge(context, sw);
        sw.flush();
        log.info("-----------------------------start------------------------------------");
        log.info(sw.toString());
        log.info("-----------------------------end------------------------------------");
    }

模板 if.vm

#foreach($element in $list)
    $velocityCount > $element
    #if($velocityCount == 1)
        <*if*>
    #elseif($velocityCount == 2 or $velocityCount == 3)
        <*elseif*>
    #else
        <*else*>
    #end
#end