1.实现Controller接口 (这种实现可以用 request 和Response来传参 和输入）
public class HelloAction implements Controller { @Override public ModelAndView handleRequest(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) throws Exception { ModelAndView modelAndView = new ModelAndView(); System.out.println( httpServletRequest.getParameter("username")); modelAndView.addObject("message","helloSpring"); modelAndView.setViewName("success"); //这样写相对路就需要配置视图解析器 return modelAndView; } }
2：继承 AbstractCommandController 类可以实现 参数Bean的封装 并且可以实现日期类型的转换功能
public class HelloAction2 extends AbstractCommandController { //编写一个构造器 在加载创建是会把所有的参数进行封装 public HelloAction2(){ //封装参数，并且会自动实现传递到 下面方法中的Object o对象中去； this.setCommandClass(Emp.class); //对象的字节码 } @Override //时期类型转换器 protected void initBinder(HttpServletRequest request, ServletRequestDataBinder binder) throws Exception { //参数类型：将String转成什么类型的字节; binder.registerCustomEditor( Date.class, new CustomDateEditor(new SimpleDateFormat("yyyy-MM-dd"),true)); } @Override protected ModelAndView handle( HttpServletRequest request, HttpServletResponse response, Object o, //表示封装后的实体，从上面的构造方法中自动传入 BindException e) throws Exception { ModelAndView modelAndView = new ModelAndView(); //默认是保存在request域中 modelAndView.addObject("message","test"); modelAndView.setViewName("success"); Emp emp = (Emp) o; System.out.println(emp.getUsername()+emp.getHiredate()); return modelAndView; } }
jsp
<body> <form action="${pageContext.request.contextPath}/hello2.action" method="post"> username:<input type="text" name="username"/> <br/> pwd:<input type="text" name="pwd"/> <br/> qq:<input type="text" name="qq"/> <br/> <input type="text" name="hiredate" value="2015-5-10"/> <input type="submit" value="tijiao"/> </form> </body>
3：注解（重点掌握）直接写一个普通的java类通过的注解的方式来实现 （@Controller 和RequestMapping（）注解来实现）
springmvc中配置如下
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd "> <!--配置Controller扫描--> <context:component-scan base-package="com.cn.controllers"></context:component-scan> <!--释放静态支援--> <!-- <mvc:default-servlet-handler/>--> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/"></property> <property name="suffix" value=".jsp"></property> </bean> </beans>
action中编写
@Controller public class HelloAction { @RequestMapping("/hello.action") public String hello(Model model, HttpServletRequest request, HttpServletResponse response) throws Exception{ System.out.println("调用了我吗？"); model.addAttribute("messsage","注解实现springmvc"); System.out.println("hello world 我是通过注解来实现的"); return "hello"; } }
扩展知识点：springmvc中的配置 有一个特殊的bean配置 ParameterizableViewController
<!-- 专用于jsp 到jsp的转发 不需要经过其他的过滤 就相当于 a.jsp 跳转到 b.jsp -->
<?xml version="1.0" encoding="UTF-8"?>
<beans
xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
<!-- 控制器-
<bean name="/hello.action" class="com.cn.HelloAction"></bean>
<bean name="/hello2.action" class="com.cn.HelloAction2"></bean>
<bean name="/hello3.action" class="com.cn.HelloAction3"></bean>
-->
<!-- 映射器
<bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"></bean>
-->
<!-- 适配器
<bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter"></bean>
-->
<!-- 专用于jsp 到jsp的转发 不需要经过其他的过滤 -->
<bean name="/index.action" class="org.springframework.web.servlet.mvc.ParameterizableViewController">
<property name="viewName" value="success"></property>
</bean>
<!-- 视图解析器-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
</beans>
jsp
<html>
<head>
<title>$Title$</title>
</head>
<body>
<form action="${pageContext.request.contextPath}/index.action" method="post">
<input type="submit" value="tijiao"/>
</form>
</body>
</html>