SpringMVC之细说HandlerAdapter

①  xml配置

<!-- 配置处理器适配器 SimpleControllerHandlerAdapter-处理器需要实现Controller接口 -->

<bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter" />

<!-- 配置处理器映射器 BeanNameUrlHandlerMapping-使用bean的名字进行映射 -->

<bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping" />  

<!-- 配置处理器适配器 -->

<bean name="/test.action" class="com.undergrowth.controller.TestController1"></bean>

<bean id="testController1" class="com.undergrowth.controller.TestHttpRequestController"></bean>  

②xml配置

<!-- HttpRequestHandlerAdapter-处理器需要实现HttpRequestHandler接口 -->

<bean class="org.springframework.web.servlet.mvc.HttpRequestHandlerAdapter"></bean>

<!-- SimpleUrlHandlerMapping-使用bean的id和路径进行映射 -->

<bean class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">

<property name="mappings">

<props>

<prop key="/test1.action">testController1</prop>

</props>

</property>

</bean>  

<!-- 使用注解方式配置处理器映射器和处理器适配器 -->

<mvc:annotation-driven></mvc:annotation-driven>

<context:component-scan base-package="com.undergrowth.controller"></context:component-scan>  

/**

 * 自定义处理器  

 *  实现Controller接口 

 */

public class TestController1 implements Controller {

    @Override

    public ModelAndView handleRequest(HttpServletRequest request,                             
                              HttpServletResponse response) throws Exception {

        //创建数据  

        List<String> list=new ArrayList<>();

        list.add("qq");

        list.add("ww");

        ModelAndView modelAndView=new ModelAndView();

        modelAndView.addObject("list", list);

        modelAndView.setViewName("/WEB-INF/test/test.jsp");

        return modelAndView;

    }

}  

/**

 * 实现HttpRequestHandler接口 

 */

public class TestHttpRequestController implements HttpRequestHandler {

    @Override

    public void handleRequest(HttpServletRequest request, HttpServletResponse response)

            throws ServletException, IOException {

        // 创建数据  

        List<String> list = new ArrayList<>();

        list.add("qq");

        list.add("ww");

        list.add("ee");

        request.setAttribute("list", list);

        request.getRequestDispatcher("/WEB-INF/test/test.jsp").forward(request, response);

    }

}

/**

 * 测试注解处理器映射器与处理器适配器 

 */

@Controller

public class TestAnnotationController {

    @RequestMapping("/test3.action")

    public ModelAndView test(){

        List<String> list=new ArrayList<>();

        list.add("qq");

        list.add("ww");

        list.add("ee");

        list.add("rr");

        ModelAndView modelAndView=new ModelAndView();

        modelAndView.addObject("list", list);

        modelAndView.setViewName("/WEB-INF/test/test.jsp");

        return modelAndView;

    }

}