struts2 拦截result的相关信息

情景：

由于业务的需要，我需要对namespace的为calculator并且type为layout的进行特殊的处理。

这就需要用到拦截器，如下配置文件

<package name="calculator" extends="default" namespace="/calculator">
		<action name="index" class="com.CalculatorAction" method="index">
		<result name="success" type="layout">/WEB-INF/calculator/index.jsp</result>
		</action>

 1、拦截获得namespace很好做，代码：

Object action = invocation.getAction();
String namespace = invocation.getProxy().getNamespace();

（1）在 interface ActionProxy 中看到了这个方法

 ActionConfig getConfig();

  public Map<String, ResultConfig> getResults() {
        return results;
    }

这个就因该是要找的那个方法。

public class ResultConfig extends Located implements Serializable {

    private Map<String,String> params;
    private String className;
    private String name;
....
}

	ActionProxy ap = invocation.getProxy();
        Map<String, ResultConfig> map = ap.getConfig().getResults();
	Collection<ResultConfig> c = map.values();
       Iterator it = c.iterator();
        for (; it.hasNext();) {
       	ResultConfig rc = (ResultConfig) it.next();
            System.out.println( rc.getClassName());
            System.out.println( rc.getName());
            System.out.println( rc.getLocation());
           System.out.println( rc.getParams());

      }

  /***
//             * 
//             * org.apache.struts2.dispatcher.ServletDispatcherResult
//				exception
//				global-results - file:/E:/javaHome/workspace2/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/fangdo/WEB-INF/classes/struts.xml:36:19
//				{location=/WEB-INF/web/error.jsp}
//				com.core.view.LayoutResult
//				success
//				action - file:/E:/javaHome/workspace2/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/fangdo/WEB-INF/classes/struts/struts-calculator.xml:128:86
//				{location=/WEB-INF/calculator/itemUser/listTax.jsp}
//             * */

 (4)虽然没有直接表示type="layout"的这个属性，但是rc.getClassName()已经能完成，根据className就可以判断了。

完整代码：

package com.action.interceptor;

import java.util.Map;

import com.action.Action;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.ActionProxy;
import com.opensymphony.xwork2.config.entities.ResultConfig;
import com.opensymphony.xwork2.interceptor.AbstractInterceptor;

public class CustomerInterceptor extends AbstractInterceptor {

	private static final long serialVersionUID = 977669153564407337L;

	@Override
	public String intercept(ActionInvocation invocation) throws Exception {

		Object action = invocation.getAction();
		ActionProxy actionProxy = invocation.getProxy();
		String namespace = actionProxy.getNamespace();
		if(action instanceof Action){
			action = (Action)action;
			if(namespace.contains("calculator")){
				Map<String, ResultConfig> map = actionProxy.getConfig().getResults();
				ResultConfig resultConfig = map.get("success");
				if(resultConfig!=null){
					String className = resultConfig.getClassName();
					if(className!=null && className.equals("com.core.view.LayoutResult")){
						//要处理的代码
					}
				}
			}
		}
		return invocation.invoke();
	}

}