标签：规则 匹配 public util name isp support return tco
SpringMVC具有三种处理器适配器，他们分别是BeanNameUrlHandlerMapping、SimpleControllerHandlerAdapter、ControllerClassNameHandlerMapping，可以分别使用这三种处理器适配器进行获取Controller。
程序结构如下：
首先，来介绍BeanNameUrlHandlerMapping映射，如下所示，这种映射使用Bean的name来访问控制器，它根据类名（Mycontroller）类名.do来访问，类名首字母小写。
（1）写UserController.java类
package com.zk.UserController;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;
public class UserController implements Controller{
public ModelAndView handleRequest(HttpServletRequest request,
HttpServletResponse response) throws Exception {
// TODO Auto-generated method stub
// 接受请求，接受参数，验证参数
// 封装参数，调用业务方法
// 返回视图
ModelAndView mv=new ModelAndView();
//设置页面回显数据
mv.addObject("hello", "凤姐喜欢你");
//指定跳转视图，返回物理视图
//mv.setViewName("/index.jsp");
//返回逻辑视图
mv.setViewName("index");
return mv;
}
}
（2）写一个index.jsp界面
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP ‘index.jsp‘ starting page</title>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
${hello }
</body>
</html>
（3）写web.xml页面
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<display-name>Spring_002</display-name>
<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!--
Spring 默认加载SpringMVC的配置文件，这个需要满足一下规则：
命名规则：Servlet-name-servlet.xml========>SpringMVC-servlet.xml
路径规范SpringMVC-serlvet.xml必须放在WEB-INF下
-->
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/config/springmvc.xml</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
（4）SpringMVC.xml配置BeanNameUrlHandlerMapping
<?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: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/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd"> <bean id="userController" name="/hello.do" class="com.zk.UserController.UserController"></bean> <!-- 配置处理器映射器 --> <bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"></bean> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/jsp/"></property> <property name="suffix" value=".jsp"></property> </bean> </beans>
运行结果如下所示：
（2）其次，来介绍SimpleControllerHandlerAdapter映射，寻找Controller 。根据浏览器url匹配简单url的key，key又Controller的id找到Controller。
更改SpringMVC.xml文件，配置一个SimpleControllerHandlerAdapter映射。
SpringMVC.xml配置文件如下：
<?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: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/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.2.xsd">
<bean id="userController" name="/hello.do" class="com.zk.UserController.UserController"></bean>
<!-- url进行集中配置 -->
<bean class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
<property name="mappings">
<props>
<prop key="/min.do">userController</prop>
<prop key="/abc.do">userController</prop>
<prop key="/ss.do">userController</prop>
</props>
</property>
</bean>
<!-- 配置处理器适配器:负责执行UserController,springMVC默认处理器适配器 -->
<bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter"></bean>
<bean class="com.zk.UserController.UserController"></bean>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
</beans>
运行结果：
（3）最后来介绍ControllerClassNameHandlerMapping，寻找Controller， 根据类名（MyController）类名.do来访问,类名首字母小写。更改SpringMVC.xml文件，配置一个ControllerClassNameHandlerMapping。
<?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: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/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.2.xsd">
<!-- 通过类名.do来访问，类名首字母小写 -->
<bean class="org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping"></bean>
<bean class="com.zk.UserController.UserController"></bean>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
</beans>
运行结果：
标签：规则 匹配 public util name isp support return tco
原文地址：https://www.cnblogs.com/longlyseul/p/11380570.html
