本文是【遍历Map集合】demo

java

/** * 遍历Map集合 */
    @Test
    public void test4() 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
        Map<String, String> map = new HashMap<String, String>(4);
        map.put("key1", "value1");
        map.put("key2", "value2");
        map.put("key3", "value3");
        map.put("key4", "value4");
        context.put("map", map);

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

#foreach($key in $map.keySet())
  $velocityCount > $key:$map.get($key)
#end