spring MVC框架
一、 框架图
二、 代码
1. web.xml
<!-- 配置Spring MVC DispatcherServlet -->
<servlet>
<servlet-name>mengka</servlet-name>
<servlet-class>com.mengka.common.DispatcherController</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<!-- 配置DispatcherServlet所需要拦截的 url -->
<servlet-mapping>
<servlet-name>mengka</servlet-name>
<url-pattern>/mengka/*</url-pattern>
</servlet-mapping>
/**
* User: mengka
* Date: 15-3-22-下午4:02
*/
public class DispatcherController extends DispatcherServlet {
private static final Logger log = LoggerFactory.getLogger(DispatcherController.class);
@Override
protected void doDispatch(HttpServletRequest request, HttpServletResponse response) throws Exception {
String path = request.getRequestURI();
log.info("------------, path = "+path);
super.doDispatch(request, response);
return;
}
}
2. mengka-servlet.xml
<?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"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/pages/"/>
<property name="suffix" value=".jsp"/>
</bean>
<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
</bean>
</beans>
3. 设置拦截器
applicationContext.xml
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<?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:util="http://www.springframework.org/schema/util"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">
<context:component-scan base-package="com.mengka.app.*"/>
<mvc:annotation-driven/>
<!-- 拦截器 -->
<mvc:interceptors>
<bean class="com.mengka.interceptor.AllInterceptor"/>
<mvc:interceptor>
<mvc:mapping path="/qingcai/*" />
<bean class="com.mengka.interceptor.TbbInterceptor"/>
</mvc:interceptor>
<mvc:interceptor>
<mvc:mapping path="/baicai/**"/>
<!--<mvc:mapping path="/mengka/baicai/list"/>-->
<!--<mvc:mapping path="/qingcai/**"/>-->
<!--<mvc:mapping path="/**" />-->
<bean id="souxianInterceptor" class="com.mengka.interceptor.TaaInterceptor"/>
</mvc:interceptor>
</mvc:interceptors>
</beans>
public class AllInterceptor implements WebRequestInterceptor {
private static final Logger log = LoggerFactory.getLogger(AllInterceptor.class);
@Override
public void preHandle(WebRequest request) throws Exception {
String url = request.getContextPath();
log.info("---------------, AllInterceptor preHandle path = "+url);
request.setAttribute("request", "request", WebRequest.SCOPE_REQUEST);//这个是放到request范围内的，所以只能在当前请求中的request中获取到
request.setAttribute("session", "session", WebRequest.SCOPE_SESSION);
}
@Override
public void postHandle(WebRequest request, ModelMap model) throws Exception {
}
@Override
public void afterCompletion(WebRequest request, Exception ex) throws Exception {
}
}
public class TaaInterceptor implements HandlerInterceptor {
private static final Logger log = LoggerFactory.getLogger(TaaInterceptor.class);
/**
* Controller 方法调用之前执行
*
* @param request
* @param response
* @param handler
* @return
* @throws Exception
*/
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
String url = request.getRequestURI();
log.info("---------------, TaaInterceptor preHandle path = "+url);
String cookie = "11111111111111";
request.setAttribute("souxianji", cookie);
return true;
}
/**
* Controller 方法调用之后执行:
* 1.在这个方法中你可以对ModelAndView进行操作
*
* @param request
* @param response
* @param handler
* @param modelAndView
* @throws Exception
*/
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
log.info("---------------, TaaInterceptor postHandle。。。");
}
/**
* 该方法将在整个请求结束之后，也就是在DispatcherServlet 渲染了对应的视图之后执行。这个方法的主要作用是用于进行资源清理工作的
*
* @param request
* @param response
* @param handler
* @param ex
* @throws Exception
*/
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
log.info("---------------, TaaInterceptor afterCompletion。。。");
}
}
4. MengkaController控制层
/**
* http://127.0.0.1:8080/mengka/get
*
* User: mengka
* Date: 2015/3/20
*/
@Controller
public class MengkaController {
@RequestMapping(value = "/add/", method = RequestMethod.POST)
public ModelAndView addPushMsg(HttpServletRequest request, HttpServletResponse response) {
Map<String, String> paraMap = new HashMap<String, String>();
paraMap.put("para", "test aaa...");
return new ModelAndView("mengka/pushSuccess", paraMap);
}
@RequestMapping(value = "/get", method = RequestMethod.GET)
public ModelAndView mengkaGet(HttpServletRequest request, HttpServletResponse response) {
Map<String, String> paraMap = new HashMap<String, String>();
paraMap.put("para", "test aaa...");
return new ModelAndView("mengka/pushSuccess", paraMap);
}
}
5. 视图层"WEB-INF/pages/mengka/pushSuccess.jsp"
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
<title>test</title>
</head>
<body>
${para}
</body>
</html>