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SpringMVC02 AbstractController And MultiActionController

　　1.AbstractController

　　　　若处理器继承自AbstractController类，那么该控制器就具有了一些新功能。因为AbstractControll类还继承自一个父类WebContentGenerator，WebContentGenerator具有supportMethods属性，可以设置支持的HTTP数据提交方式。默认支持GET/POST/HEAD.

　　1.1：中央调度器

<!DOCTYPE web-app PUBLIC
        "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
        "http://java.sun.com/dtd/web-app_2_3.dtd" >
<web-app>
  <display-name>Archetype Created Web Application</display-name>
  <servlet>
    <servlet-name>springmvc</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:spring-mvc.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>

  <servlet-mapping>
    <servlet-name>springmvc</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>
</web-app>

　　1.2：定义处理器

import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.AbstractController;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class MyAbstractController extends AbstractController {
    @Override
    protected ModelAndView handleRequestInternal(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) throws Exception {
        return new ModelAndView("index");
    }
}

　　1.3：jsp页面搭建

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<body>
<h2>Spring第一个Spring MVC程序</h2>
<img src="images/1504837384314376.png">/
</body>
</html>

　　1.4：spring-mvc.xml配置

<?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.xsd
       http://www.springframework.org/schema/mvc
       http://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <!--处理器映射器-->
    <bean class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
        <property name="urlMap">
            <map>
                <entry key="/*.do" value="firstController"></entry>
            </map>
        </property>
    </bean>
    
    <!--拦截请求的方式-->
    <bean id="firstController" class="cn.happy.controller.MyAbstractController">
        <property name="supportedMethods" value="POST,GET"></property>
    </bean>

    <!--视图解析器-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/"/>
        <property name="suffix" value=".jsp"/>
    </bean>

    <!--拦截静态文件-->
    <mvc:default-servlet-handler/>
</beans>

测试结果：

　　2.MultiActionController默认方法名解析器

　　　　MultiActionController类具有一个属性methodNameResolver,方法名解析器其具有默认值InternalPathMethodNameResolver,该解析器将方法名作为资源名称进行解析，那就意味着，我们提交请求时，要将方法名作为资源名称出现

　　2.1：中央调度器

<!DOCTYPE web-app PUBLIC
        "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
        "http://java.sun.com/dtd/web-app_2_3.dtd" >
<web-app>
  <display-name>Archetype Created Web Application</display-name>
  <servlet>
    <servlet-name>springmvc</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:spring-mvc.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>

  <servlet-mapping>
    <servlet-name>springmvc</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>
</web-app>

　　2.2：定义处理器

import org.springframework.web.servlet.mvc.multiaction.MultiActionController;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class MyMultiController extends MultiActionController {
    public String doFirst(HttpServletRequest request, HttpServletResponse response) {
        return "first";
    }
    public String doSecond(HttpServletRequest request, HttpServletResponse response) {
        return "second";
    }
}

　　2.3.1：jsp页面搭建(doFirst)

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
<h2>doFirst</h2>
</body>
</html>

　　2.3.2：jsp页面搭建(doSecond)

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
<h2>doSecond</h2>
</body>
</html>

　　2.4：spring-mvc.xml配置

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd ">

    <bean class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
        <property name="mappings">
            <props>
                <prop key="/*.do">firstController</prop>
            </props>
        </property>
    </bean>

    <bean id="propertiesMethodNameResolver"
          class="org.springframework.web.servlet.mvc.multiaction.PropertiesMethodNameResolver">
        <property name="mappings">
            <props>
                <prop key="/first.do">doFirst</prop>
                <prop key="/second.do">doSecond</prop>
            </props>
        </property>
    </bean>

    <bean id="firstController" class="cn.happy.controller.MyMultiController">
        <property name="methodNameResolver" ref="propertiesMethodNameResolver"></property>
    </bean>

    <!--视图解析器-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/"/>
        <property name="suffix" value=".jsp"/>
    </bean>

</beans>

测试结果：

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原文地址：https://www.cnblogs.com/Chenghao-He/p/7747047.html