自定義視圖
可以整合jfreechart、excel
    @RequestMapping("/testView")
    public String testView(){
        System.out.println("testView");
        return "helloView";
    }

@Component
public class HelloView implements View{

    @Override
    public String getContentType() {
        return "text/html";
    }

    @Override
    
 
public void render(Map<String, ?> model, HttpServletRequest request,
            HttpServletResponse response) throws Exception {
        response.getWriter().print("hello view, time: " + new Date());
    }

}
<!-- 配置視圖  BeanNameViewResolver 解析器: 使用視圖的名字來解析視圖 -->
    <!-- 通過 order 屬性來定義視圖解析器的優先級, order 值越小優先級越高 -->
    <bean class
 
="org.springframework.web.servlet.view.BeanNameViewResolver">
        <property name="order" value="100"></property>
    </bean>

springmvc自定義視圖