SpringMVCXML非注解配置使用

首先按照 SpringMVC框架原理 需要先配置前端控制器

前端控制器配置 DispatcherServlet

    前端控制器DispatcherServlet
    在web.xml里面配置前端控制器 DispatcherServlet
          
          
              springMVC
              org.springframework.web.servlet.DispatcherServlet
              
              
              
                  ContextConfigLocation
              
                  classpath:SpringMVCBeans.xml
              
           
                
           
           
                springMVC
                
                
                
                *.action
            

补充:

其实当用户配置好前端控制器（DispatcherServlet）后，不配置处理器映射器（HandlerMapping）和处理器适配器（HandlerAdapter），程序照样可以运行。
        这是因为SpringMVC会加载SpringMVC依赖jar包下默认的配置文件DispatcherServlet.properties，该文件内部对于处理器映射器和处理器适配器都有默认配置。

# Default implementation classes for DispatcherServlet's strategy interfaces.
# Used as fallback when no matching beans are found in the DispatcherServlet context.
# Not meant to be customized by application developers.

org.springframework.web.servlet.LocaleResolver=org.springframework.web.servlet.i18n.AcceptHeaderLocaleResolver

org.springframework.web.servlet.ThemeResolver=org.springframework.web.servlet.theme.FixedThemeResolver

org.springframework.web.servlet.HandlerMapping=org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping,\
	org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping

org.springframework.web.servlet.HandlerAdapter=org.springframework.web.servlet.mvc.HttpRequestHandlerAdapter,\
	org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter,\
	org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter

org.springframework.web.servlet.HandlerExceptiOnResolver=org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerExceptionResolver,\
	org.springframework.web.servlet.mvc.annotation.ResponseStatusExceptionResolver,\
	org.springframework.web.servlet.mvc.support.DefaultHandlerExceptionResolver

org.springframework.web.servlet.RequestToViewNameTranslator=org.springframework.web.servlet.view.DefaultRequestToViewNameTranslator

org.springframework.web.servlet.ViewResolver=org.springframework.web.servlet.view.InternalResourceViewResolver

org.springframework.web.servlet.FlashMapManager=org.springframework.web.servlet.support.SessionFlashMapManager

配置处理器映射器HandlerMapping

     (SpringMVC提供了两种选择)(另外SpringMVC允许用户同时配置这两个处理器映射器（两者可以共存）)
     1.在SpringMVCBeans.xml配置处理器映射器HandlerMapping (将处理器适配器交由SpringMVC容器管理)
          
          
          
          
          
          




    2.在SpringMVCBeans.xml配置(第二种)处理器映射器SimpleHandlerMapping
          
          
          
          
          
              
                   
                        CelebrityController(这里是bean(controller)的id)
                        CelebrityController(这里是bean(controller)的id)
                   
              
           

处理器适配器配置 HandlerAdapter

    处理器映射器(SpringMVC提供了两种选择)
    1.在SpringMVCBeans.xml配置处理器适配器HandlerAdapter  （将处理器适配器交由SpringMVC容器管理）
        
        
        
        
        
        
        @Override
        public boolean supports(Object handler) {
            return (handler instanceof Controller);
        }
			            
        public interface Controller {
            ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception;
        }
					
    2.第二种处理器适配器，在SpringMVCBeans.xml配置处理器适配器HandlerAdapter	
        
        
        
        
        
        
        @Override
        public boolean supports(Object handler) {
            return (handler instanceof HttpRequestHandler);
        }
        public interface HttpRequestHandler {
            void handleRequest(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException;
        }

编写Handler(Controller)

//第一种 实现Controller接口
@Component
public class CelebrityController implements Controller {

	@Autowired
	private CelebrityService celebrityService;
	
	@Override
	public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception {

		Celebrity celebrity = new Celebrity();
		celebrity.setID(1);
		celebrity.setName("Tim");

		ModelAndView modelAndView = new ModelAndView();

		try {
			Map result = celebrityService.saveAndView(celebrity, celebrity.getID());
			Iterator iterator = result.entrySet().iterator();
			while (iterator.hasNext()) {
				Map.Entry entry = (Entry) iterator.next();
				// 指定model
				modelAndView.addObject("celebrity", celebrity);
				// 指定视图
				modelAndView.setViewName("/WEB-INF/jsp/show.jsp");
			}
		}catch(Exception e){
			// 指定model
			modelAndView.addObject("error", e);
			// 指定视图
			modelAndView.setViewName("/WEB-INF/jsp/error.jsp");
		}
		
		return modelAndView;
	}

}




//第二种  实现HttpRequestHandler接口
@Component
public class CelebrityControllerForHttpRequestHandlerAdapter implements HttpRequestHandler {

	@Autowired
	private CelebrityService celebrityService;

	@Override
	public void handleRequest(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		Celebrity celebrity = new Celebrity();
		celebrity.setID(1);
		celebrity.setName("Tim");

		try {
			Map result = celebrityService.saveAndView(celebrity, celebrity.getID());
			Iterator iterator = result.entrySet().iterator();
			while (iterator.hasNext()) {
				Map.Entry entry = (Entry) iterator.next();
				// 指定model
				request.setAttribute("celebrity", celebrity);
				// 指定视图
				request.getRequestDispatcher("/WEB-INF/jsp/show.jsp").forward(request, response);
			}
		} catch (Exception e) {
			// 指定model
			request.setAttribute("error", e);
			// 指定视图
			request.getRequestDispatcher("/WEB-INF/jsp/error.jsp").forward(request, response);
		}

	}

}

视图编写

编写视图 jsp，pdf、、、

配置视图解析器ViewResolver

在SpringMVCBeans.xml配置视图解析器ViewResolver （将处理器适配器交由SpringMVC容器管理）