baseaction.java

实现用户关系管理系统

package org.jb.common.web.action;

import java.util.Iterator;
import java.util.List;

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

import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;
import org.apache.struts.actions.DispatchAction;
import org.jb.y2t308.team3.entity.SysRight;
import org.jb.y2t308.team3.entity.SysUser;

public class BaseAction extends DispatchAction {
	protected ActionMessages errors = new ActionMessages();

	protected void clearErrors() {
		errors.clear();
	}

	protected void SaveErrors(HttpServletRequest request) {
		if (!errors.isEmpty()) {
			super.saveErrors(request, errors);
		}
	}

	protected void AddError(String resKey) {
		this.errors.add("iConghai.ERROR_KEY", new ActionMessage(resKey));
	}

	protected void AddError(String resKey, String msg) {
		this.errors.add("ERROR_KEY", new ActionMessage(resKey, msg));
	}

	@Override
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		clearErrors();
		String errorCode = request.getParameter("error_code");
		if (null != errorCode) {
			AddError(errorCode);
		}
		ActionForward af = super.execute(mapping, form, request, response);
		SaveErrors(request);
		return af;
	}

	/**
	 * 构建系统菜单
	 */
	protected void buildMenuString(HttpServletRequest request) {
		//从session 中获取到当前用户
		SysUser user = (SysUser) request.getSession().getAttribute("USER");
		if (user != null) {
			//定义StringBuffer 对象
			StringBuffer sb = new StringBuffer();
			//获取当前用户的所有权限
			List rights = user.getUsrRole().getRights();
			//将 list 转化为 Iterator
			Iterator it = rights.iterator();
			//遍历当前用户权限，并且运用StringBuffer 进行分级
			while (it.hasNext()) {
				SysRight right = (SysRight) it.next();
				sb.append("\r\n");
				sb.append(right.getRightCode()).append(" = theMenu.addChild(")
						.append(right.getRightParentCode()).append(", \"")
						.append(right.getRightType()).append("\", \"").append(
								right.getRightText()).append("\", \"").append(
								right.getRightUrl()).append("\", \"").append(
								right.getRightTip()).append("\");\r\n");
			}
			request.getSession().setAttribute("MENU_STRING", sb.toString());
		}
	}
}