SpringMvc系列之SpringMvc常用请求映射器实例

本片文章用来介绍常用的SpringMvc常用的请求映射器。

Web.xml配置如下：

<?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>LearnSpringMvc</display-name>
<!-- 配置Spring上下文配置文件 -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<!-- 配置SpringMVC Servlet -->
<servlet>
<servlet-name>spring-mvc</servlet-name>
<!-- SpringMVC 分发器 -->
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!-- 更改SpringMVC配置文件的名字 默认的是spring-mvc-servlet.xml -->
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:springMvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>spring-mvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- 配置监听器 用来载入上下文配置文件 -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- 编码过滤器 -->
<filter>
<filter-name>CharacterEncodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>utf-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>CharacterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>
SpringMvc配置文件
<?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:tx="http://www.springframework.org/schema/tx"
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/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd" default-autowire="byName">

<!-- 加载静态资源 -->
<mvc:resources location="/static/" mapping="/static/**" />

<!-- 视图解析器 常用的还有 VelocityViewResolver、FreeMarkerViewResolver -->
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView" />
<property name="prefix" value="/WEB-INF/jsp/" />
<property name="suffix" value=".jsp" />
</bean>
</beans>

SimpleUrlHandlerMapping

<bean class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
<!-- 第一种配置方式 -->
<property name="mappings">
<props>
<prop key="/simpleUrl.do">simpleUrl</prop>
</props>
</property>
<!-- 第二种配置方式 -->
<property name="urlMap">
<map>
<entry key="/simpleUrl1.do" value-ref="simpleUrl"/>
</map>
</property>

<!-- 第三种配置方式  -->
<property name="mappings">
<value>
/simpleUrl1.do=simpleUrl
/simpleUrl2.do=beanName
</value>
</property>

</bean>
<bean name="simpleUrl" class="com.zkn.learnspringmvc.controller.SimpleUrlController" /><pre name="code" class="java">

package com.zkn.learnspringmvc.controller;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.AbstractController;

/**
* 测试SimpleURL
* @author zkn 2016-05-23
*
*/

public class SimpleUrlController extends AbstractController{

@Override
protected ModelAndView handleRequestInternal(HttpServletRequest request, HttpServletResponse response)
throws Exception {
ModelAndView mv = new ModelAndView();
mv.addObject("message", "这是SimpleUrlController");
mv.addObject("errorMessage", "这是SimpleUrlController");
mv.setViewName("home");
return mv;
}
}

ControllerBeanNameHandlerMapping

<!-- bean名字控制器 和bean的名字有关系和类的名字没有关系 可以和ControllerClassNameHandlerMapping
相互对比记忆 -->
<bean
class="org.springframework.web.servlet.mvc.support.ControllerBeanNameHandlerMapping" />
<bean name="beanName" class="com.zkn.learnspringmvc.controller.BeanNameController" />

package com.zkn.learnspringmvc.controller;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.AbstractController;

public class BeanNameController extends AbstractController{

@Override
protected ModelAndView handleRequestInternal(HttpServletRequest request, HttpServletResponse response)
throws Exception {
ModelAndView mv = new ModelAndView();
mv.addObject("message", "这是BeanNameController");
mv.addObject("errorMessage", "这是第二个首页错误页面");
mv.setViewName("home");
return mv;
}
}

ControllerClassNameHandlerMapping

<!-- 类名称控制器 注意访问的时候是 /classname 全部是小写的。Controller不用写。 和bean的名字没关系，只和类的名字有关系。 -->
<bean
class="org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping" />
<bean name="className" class="com.zkn.learnspringmvc.controller.ClassNameController" />

package com.zkn.learnspringmvc.controller;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.AbstractController;

/**
* 类名字映射处理器
* 访问路径为：http://localhost:8080/LearnSpringMvc/classname
* @author wb-zhangkenan
*
*/

public class ClassNameController extends AbstractController{

@Override
protected ModelAndView handleRequestInternal(HttpServletRequest request, HttpServletResponse response)
throws Exception {
ModelAndView mv = new ModelAndView();
mv.addObject("message", "这个是ClassNameController");
mv.setViewName("home");
return mv;
}

}

BeanNameUrlHandlerMapping

<!-- 请求处理映射器 beanName映射器 将Controller包装为HandlerExecutionChain -->
<bean
class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping" />
<!-- 调用Controller中的处理器方法 -->
<bean
class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter" />
<bean name="/beanUrlName"
class="com.zkn.learnspringmvc.controller.BeanNameURLController"></bean>

package com.zkn.learnspringmvc.controller;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.AbstractController;

public class BeanNameURLController extends AbstractController{

@Override
protected ModelAndView handleRequestInternal(HttpServletRequest request, HttpServletResponse response)
throws Exception {
ModelAndView mv = new ModelAndView();
mv.addObject("message", "BeanNameURLController");
mv.addObject("errorMessage", "这是第二个首页错误页面");
mv.setViewName("home");
return mv;
}

}

RequestMappingHandlerMapping

<!-- SpringMVC注解驱动 -->
<mvc:annotation-driven />
<!-- 注解扫描 Spring Bean -->
<context:component-scan base-package="com.zkn.learnspringmvc.controller" />
<!-- DefaultAnnotationHandlerMapping从3.1之后被标注为过期,3.1之后用 RequestMappingHandlerMapping -->
<bean
class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping" />
<bean
class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter" />

package com.zkn.learnspringmvc.controller;

import java.util.Map;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

/**
*
* @author zkn 2016-05-16
*
*/
@Controller
public class HomeController {
/**
* 注解第一种写法
* @param modelMap
* @return
*/
@RequestMapping(value="/home1.do")
public String home(Model modelMap){
modelMap.addAttribute("message", "这个是首页!!!");
modelMap.addAttribute("errorMessage", "这个是首页!!!");
return "home";
}
/**
* 注解第二种写法
* @param modelMap
* @return
*/
@RequestMapping(value="/home2.do")
public ModelAndView home(){
ModelAndView mv = new ModelAndView();
mv.addObject("message", "这是第二个首页");
mv.addObject("errorMessage", "这是第二个首页错误页面");
mv.setViewName("home");
return mv;
}
/**
* 注解第三种写法
* @param modelMap
* @return
*/
@RequestMapping(value="/home3.do")
public String home2(Map<String, Object> map){
map.put("message", "这是home3.do");
map.put("errorMessage", "home3.do");
return "home";
}
}

jsp页面

<%@page language="java" contentType="text/html;charset=UTF-8"
pageEncoding="UTF-8"%>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<html>
<head>
<script type="text/javascript" src="static/js/jquery-2.1.4.min.js"></script>
</head>
<body>
<%=request.getAttribute("message") %>
<%=request.getAttribute("errorMessage") %>
${message}
${errorMessage}
</body>
</html>