Struts2 chain类型不能 跳转DMI型式路径

其实就是复制了 com.opensymphony.xwork2.ActionChainResult再在execute里进行了些判断,达到了我项目的需求

可以正确跳转actionName!method这种DMI型式的路径
可以带参数跳转

package com.common.base.struts2.interceptor;


import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.Map;
import java.util.Set;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.ActionProxy;
import com.opensymphony.xwork2.ActionProxyFactory;
import com.opensymphony.xwork2.Result;
import com.opensymphony.xwork2.XWorkException;
import com.opensymphony.xwork2.inject.Inject;
import com.opensymphony.xwork2.util.TextParseUtil;
import com.opensymphony.xwork2.util.ValueStack;
import com.opensymphony.xwork2.util.logging.Logger;
import com.opensymphony.xwork2.util.logging.LoggerFactory;

/**
 * 
 * 重写了默认的chain拦截器com.opensymphony.xwork2.ActionChainResult
 * 可以正确跳转actionName!method这种DMI型式的路径
 * 可以带参数跳转
 * 使用:
 * <struts>
	<package ...
 		<result-types> 
            <result-type name="chain" class="com.common.base.struts2.interceptor.ActionChainResult"></result-type> 
   		</result-types>
   		<result type="chain">...</result>
   	</package>
 * </struts>
 * @author Administrator
 *
 */
public class ActionChainResult implements Result {

    private static final Logger LOG = LoggerFactory.getLogger(ActionChainResult.class);

    /**
     * The result parameter name to set the name of the action to chain to.
     */
    public static final String DEFAULT_PARAM = "actionName";

    /**
     * The action context key to save the chain history.
     */
    private static final String CHAIN_HISTORY = "CHAIN_HISTORY";

    /**
     * The result parameter name to set the name of the action to chain to.
     */
    public static final String SKIP_ACTIONS_PARAM = "skipActions";


    private ActionProxy proxy;
    private String actionName;
    
    private String namespace;

    private String methodName;

    /**
     * The list of actions to skip.
     */
    private String skipActions;

    private ActionProxyFactory actionProxyFactory;

    public ActionChainResult() {
        super();
    }

    public ActionChainResult(String namespace, String actionName, String methodName) {
        this.namespace = namespace;
        this.actionName = actionName;
        this.methodName = methodName;
    }

    public ActionChainResult(String namespace, String actionName, String methodName, String skipActions) {
        this.namespace = namespace;
        this.actionName = actionName;
        this.methodName = methodName;
        this.skipActions = skipActions;
    }


    /**
     * @param actionProxyFactory the actionProxyFactory to set
     */
    @Inject
    public void setActionProxyFactory(ActionProxyFactory actionProxyFactory) {
        this.actionProxyFactory = actionProxyFactory;
    }

    /**
     * Set the action name.
     *
     * @param actionName The action name.
     */
    public void setActionName(String actionName) {
        this.actionName = actionName;
    }

    /**
     * sets the namespace of the Action that we're chaining to.  if namespace
     * is null, this defaults to the current namespace.
     *
     * @param namespace the name of the namespace we're chaining to
     */
    public void setNamespace(String namespace) {
        this.namespace = namespace;
    }

    /**
     * Set the list of actions to skip.
     * To test if an action should not throe an infinite recursion,
     * only the action name is used, not the namespace.
     *
     * @param actions The list of action name separated by a white space.
     */
    public void setSkipActions(String actions) {
        this.skipActions = actions;
    }


    public void setMethod(String method) {
        this.methodName = method;
    }

    public ActionProxy getProxy() {
        return proxy;
    }

    /**
     * Get the XWork chain history.
     * The stack is a list of <code>namespace/action!method</code> keys.
     */
    public static LinkedList getChainHistory() {
        LinkedList chainHistory = (LinkedList) ActionContext.getContext().get(CHAIN_HISTORY);
        //  Add if not exists
        if (chainHistory == null) {
            chainHistory = new LinkedList();
            ActionContext.getContext().put(CHAIN_HISTORY, chainHistory);
        }

        return chainHistory;
    }

    /**
     * @param invocation the DefaultActionInvocation calling the action call stack
     */
    public void execute(ActionInvocation invocation) throws Exception {
        // if the finalNamespace wasn't explicitly defined, assume the current one
        if (this.namespace == null) {
            this.namespace = invocation.getProxy().getNamespace();
        }

        ValueStack stack = ActionContext.getContext().getValueStack();
        String finalNamespace = TextParseUtil.translateVariables(namespace, stack);
        String finalActionName = TextParseUtil.translateVariables(actionName, stack);
        String finalMethodName=null;
        int index=-1;
        //项目中用到的跳转前缀
        if(!finalActionName.startsWith("dispatcher.")&&!finalActionName.startsWith("redirect.")){
        	index=finalActionName.indexOf('!');
        }
        
        if(index!=-1){
        	finalMethodName=finalActionName.substring(index+1);
        	finalActionName=finalActionName.substring(0,index);
        }else{
        	finalMethodName = this.methodName != null
            ? TextParseUtil.translateVariables(this.methodName, stack)
            : null;
        }
        index=finalMethodName!=null?finalMethodName.indexOf('?'):-1;
        String paramStr=null;
        if(index!=-1){
        	paramStr=finalMethodName.substring(index+1);
        	finalMethodName=finalMethodName.substring(0,index);
        }
        
        Map paramMap=ActionContext.getContext().getParameters();
        if(paramStr!=null){
        	String [] params=paramStr.split("&");
        	for(String temp:params){
        		index=temp.indexOf('=');
        		paramMap.put(temp.substring(0,index), temp.substring(index+1));
        	}
        }
        
        if (isInChainHistory(finalNamespace, finalActionName, finalMethodName)) {
            addToHistory(finalNamespace, finalActionName, finalMethodName);
            throw new XWorkException("Infinite recursion detected: "
                    + ActionChainResult.getChainHistory().toString());
        }

        if (ActionChainResult.getChainHistory().isEmpty() && invocation != null && invocation.getProxy() != null) {
            addToHistory(finalNamespace, invocation.getProxy().getActionName(), invocation.getProxy().getMethod());
        }
        addToHistory(finalNamespace, finalActionName, finalMethodName);
       
        
        HashMap extraContext = new HashMap();
        extraContext.put(ActionContext.VALUE_STACK, ActionContext.getContext().getValueStack());
        extraContext.put(ActionContext.PARAMETERS,paramMap);
        extraContext.put(CHAIN_HISTORY, ActionChainResult.getChainHistory());

        if (LOG.isDebugEnabled()) {
            LOG.debug("Chaining to action " + finalActionName);
        }

        proxy = actionProxyFactory.createActionProxy(finalNamespace, finalActionName, finalMethodName, extraContext);
        proxy.execute();
    }

    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;

        final ActionChainResult that = (ActionChainResult) o;

        if (actionName != null ? !actionName.equals(that.actionName) : that.actionName != null) return false;
        if (methodName != null ? !methodName.equals(that.methodName) : that.methodName != null) return false;
        if (namespace != null ? !namespace.equals(that.namespace) : that.namespace != null) return false;

        return true;
    }

    public int hashCode() {
        int result;
        result = (actionName != null ? actionName.hashCode() : 0);
        result = 31 * result + (namespace != null ? namespace.hashCode() : 0);
        result = 31 * result + (methodName != null ? methodName.hashCode() : 0);
        return result;
    }

    private boolean isInChainHistory(String namespace, String actionName, String methodName) {
        LinkedList chainHistory = ActionChainResult.getChainHistory();

        if (chainHistory == null) {
            return false;
        } else {
            //  Actions to skip
            Set skipActionsList = new HashSet();
            if (skipActions != null && skipActions.length() > 0) {
                ValueStack stack = ActionContext.getContext().getValueStack();
                String finalSkipActions = TextParseUtil.translateVariables(this.skipActions, stack);
                skipActionsList.addAll(TextParseUtil.commaDelimitedStringToSet(finalSkipActions));
            }
            if (!skipActionsList.contains(actionName)) {
                //  Get if key is in the chain history
                return chainHistory.contains(makeKey(namespace, actionName, methodName));
            }

            return false;
        }
    }

    private void addToHistory(String namespace, String actionName, String methodName) {
        LinkedList chainHistory = ActionChainResult.getChainHistory();
        chainHistory.add(makeKey(namespace, actionName, methodName));
    }

    private String makeKey(String namespace, String actionName, String methodName) {
        if (null == methodName) {
            return namespace + "/" + actionName;
        }

        return namespace + "/" + actionName + "!" + methodName;
    }
}