1.pom.xml中配置

		<spark-template.version>2.7.1</spark-template.version>
		
		<!-- freemarker模板-->
        <dependency>
            <groupId>com.sparkjava</groupId>
            <artifactId>spark-template-freemarker</artifactId>
            <version>${spark-template.version}</version>
        </dependency>
        <!-- velocity模板-->
        <dependency>
            <groupId>com.sparkjava</groupId>
            <artifactId>spark-template-velocity</artifactId>
            <version>${spark-template.version}</version>
        </dependency>
        <!-- jade模板-->
        <dependency>
            <groupId>com.sparkjava</groupId>
            <artifactId>spark-template-jade</artifactId>
            <version>${spark-template.version}</version>
        </dependency>

2.项目结构

3.controller写法

@Override
    public void router() {
        // 测试velocity
        get("/oaPerf", (req, res) -> {
            String context = req.contextPath();
            Map<String, Object> model = new HashMap<>();
            model.put("projectPath", context == null ? "123" : context);
            return new VelocityTemplateEngine().render(new ModelAndView(model, "templates/oaPerf.vm"));
        });

        // 测试freemarker
        get("/testFtl", (req, res) -> {
            String context = req.contextPath();
            Map<String, Object> model = new HashMap<>();
            model.put("projectPath", context == null ? "213" : context);
            Configuration cfg = new Configuration();
            cfg.setClassForTemplateLoading(this.getClass(), "/templates/");
            return new FreeMarkerEngine(cfg).render(new ModelAndView(model, "test.ftl"));
        });

		//测试jade
		get("/bankView", (req, res) -> {
			String context = req.contextPath();
			Map<String, Object> model = new HashMap<String, Object>();
			model.put("projectPath", context == null ? "321" : context);
			return new JadeTemplateEngine().render(new ModelAndView(model, "bankManage"));
		});
    }

看源码大致是三个模板的资源加载器默认路径设置的不同，后续有时间研究。。。