SpringMVC 中如何将MultiActionController和CommandController结和使用

在利用Spring MVC 时，或许会想到把MultiActionController和CommandController结全起来全用，使你的Controller功能更加强大。现在就有这样一个例子，能使你的一个Controller既可以处理多个URL请求，又可以接受form表单
Controller源码如下：

java 代码

java 代码

package com.betop.probe.controller.study;

import java.util.HashMap;
import java.util.Map;

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

import org.springframework.validation.BindException;
import org.springframework.web.bind.ServletRequestDataBinder;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.AbstractCommandController;

import com.betop.probe.domain.MasterUser;

public class UserMultiActionController3 extends AbstractCommandController{

    public UserMultiActionController3(){
        this.setCommandClass(MasterUser.class);
    }

    public ModelAndView demo1(HttpServletRequest req, HttpServletResponse resp)throws Exception {

        Map<String, Object> model = new HashMap<String, Object>();
        model.put("message", "这是MultiActioncontroller的第三种配置!");
        return new ModelAndView("study/MultiActionControllerView3.vm", model);
    }

    public ModelAndView demo2(HttpServletRequest req, HttpServletResponse resp)throws Exception{


        MasterUser user = getCommand(req, resp);

        Map<String, Object> model = new HashMap<String, Object>();

        model.put("user", user);

        return new ModelAndView("study/result.vm", model);
        //return super.handleRequest(req, resp);
    }

    private MasterUser getCommand(HttpServletRequest req, HttpServletResponse resp) throws Exception{

        MasterUser command = (MasterUser)getCommand(req);
        ServletRequestDataBinder binder = bindAndValidate(req, command);
        BindException errors = new BindException(binder.getBindingResult());

        return command;
    }

    @Override
    protected ModelAndView handle(HttpServletRequest request,
            HttpServletResponse response, Object command, BindException errors)
            throws Exception {
        // TODO Auto-generated method stub
        return null;
    }

}

配置如下：

xml 代码

       <bean id="testMulti3" class="com.betop.probe.controller.study.UserMultiActionController3"/>

<bean id="proxyController" class="org.springframework.web.servlet.mvc.multiaction.MultiActionController">
    <property name="methodNameResolver">
        <ref bean="paraMethodResolver"/>
    </property>

    <property name="delegate">
        <ref bean="testMulti3"/>
    </property>
</bean>

<bean id="SimpleUrlMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
       <property name="mappings">
           <props>
        <prop key="/test/*.htm">proxyController</prop>
           </props>
       </property>
   </bean>

这样你就可以通过URL：http://host/project/test/demo2.htm来提交你的表单
URL：http://host/project/test/demo1.htm来访问另外一个方法。
上面的做法是通过getCommand方法，借用了父类里的一些功能把请求参数转换为你想要的对象。

当然，你也可以不去写getCommand方法，对于方法demo2也可以写成如下：

java 代码

public ModelAndView demo2(HttpServletRequest req, HttpServletResponse resp)throws Exception{
     return super.handleRequest(req, resp);
}

这样你就要把demo2中功能复制到handle方法中。

评论

2 楼 稻香麦甜 2008-10-14  

干嘛不和SimpleFormController 结合？

1 楼 acf 2007-11-23  

配置中少了一部分，这里加上：
<bean id="paraMethodResolver"  class="org.springframework.web.servlet.mvc.multiaction.ParameterMethodNameResolver">
<property name="paramName">
      <value>method</value>
</property>
</bean>