baseaction.java

来自「java网上考试系统」· Java 代码 · 共 46 行

package com.qrsx.exam.struts;

import javax.servlet.http.HttpServletRequest;

import org.apache.struts.Globals;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;
import org.apache.struts.actions.DispatchAction;

public class BaseAction extends DispatchAction {
    /**
     * 增加错误（提示）信息
     * 
     * @param request HttpServletRequest实例
     * @param key 资源的Key值
     * @param values 资源的参数值
     */
    public void addMessage(HttpServletRequest request, String key,
            String[] values) {
        // 得到ActionMessages对象的实例
        ActionMessages messages = (ActionMessages) request
                .getAttribute(Globals.ERROR_KEY);
        if (messages == null)
            messages = new ActionMessages();

        // 创建ActionMessage对象的实例，并增加到ActionMessages对象的实例中
        if (values != null && values.length > 0)
            messages.add(Globals.ERROR_KEY, new ActionMessage(key, values));
        else
            messages.add(Globals.ERROR_KEY, new ActionMessage(key));

        // 将ActionMessages对象的实例绑定到request上
        request.setAttribute(Globals.ERROR_KEY, messages);
    }

    /**
     * 增加错误（提示）信息
     * 
     * @param request HttpServletRequest实例
     * @param key 资源的Key值
     */
    public void addMessage(HttpServletRequest request, String key) {
        addMessage(request, key, null);
    }
}