springMVC_controller四种配置总结

Posted 2021-01-26 aihuadung

 

一.通过url对应bean,加粗部分为必须有的

<bean class=" org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"></bean>
    <!-- 配置handlerAdapter ,这个配置可以没有,但是配置请求和处理器时,name名称必须要规范 -->
    <bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter"></bean>
    <!-- 配置渲染器 -->
    <bean id="jspViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
        <!-- 将视图名 渲染后视图的前缀 -->
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <!-- 渲染后视图的后缀 -->
        <property name="suffix" value=".jsp"/>
        <!-- 例：视图名为:hello   渲染后：/WEB-INF/jsp/hello.jsp 该页面-->
    </bean>
    <!-- 配置请求和处理器 -->
    <bean name="/hello.do" class="com.ahd.controller.HelloController"></bean>

 

二.为url分配bean

<?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:p="http://www.springframework.org/schema/p"
    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/context
        http://www.springframework.org/schema/context/spring-context.xsd">
    
    
    <!-- 配置渲染器 -->
    <bean id="jspViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
        <!-- 将视图名 渲染后视图的前缀 -->
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <!-- 渲染后视图的后缀 -->
        <property name="suffix" value=".jsp"/>
        <!-- 例：视图名为:hello   渲染后：/WEB-INF/jsp/hello.jsp 该页面-->
    </bean>
    <bean class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
        <property name="mappings">
            <props>
                <!-- key值为url,value为对应处理器的id -->
                <prop key="/hello.do">HelloController</prop>
            </props>
        </property>
    </bean>
    <bean id="HelloController" class="com.ahd.controller.HelloController"></bean>

 

三.为url匹配bean

<?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:p="http://www.springframework.org/schema/p"
    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/context
        http://www.springframework.org/schema/context/spring-context.xsd">
    
    
    <!-- 配置渲染器 -->
    <bean id="jspViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
        <!-- 将视图名 渲染后视图的前缀 -->
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <!-- 渲染后视图的后缀 -->
        <property name="suffix" value=".jsp"/>
        <!-- 例：视图名为:hello   渲染后：/WEB-INF/jsp/hello.jsp 该页面-->
    </bean>    
    <bean class="org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping"></bean>
    <!-- 请求为hello*.do,都将被处理 称之为匹配 -->
    <bean id="helloController" class="com.ahd.controller.HelloController"></bean>
</beans>

 

四.使用注解

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:p="http://www.springframework.org/schema/p"
    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/context
        http://www.springframework.org/schema/context/spring-context.xsd">
        
    <!-- 配置渲染器 -->
    <bean id="jspViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
        <!-- 将视图名 渲染后视图的前缀 -->
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <!-- 渲染后视图的后缀 -->
        <property name="suffix" value=".jsp"/>
        <!-- 例：视图名为:hello   渲染后：/WEB-INF/jsp/hello.jsp 该页面-->
    </bean>
<!—配置扫描指定包的注解--!>
    <context:component-scan base-package="com.ahd.controller"></context:component-scan>
    
</beans>

 

控制器类HelloController

package com.ahd.controller;

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

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

@Controller
public class HelloController {
    @RequestMapping("hello")
    public ModelAndView hello(HttpServletRequest req,HttpServletResponse resp){
        ModelAndView mv=new ModelAndView();
        
        mv.addObject("msg", "hello,welcome to use annotation");
        mv.setViewName("hello");
        return mv;
    }
}