addbookmanageraction.java

这是本人曾经在公司里用的,内部开发框架,基于struts+hibernate今天分享给大家

/**
 * 
 */
package test.book;

import java.io.UnsupportedEncodingException;
import java.sql.PreparedStatement;
import java.sql.ResultSet;

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

import org.apache.struts.action.ActionError;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.hibernate.Session;
import org.hibernate.Transaction;

import cn.bway.common.BwayHibernateException;
import cn.bway.common.WebConstant;
import cn.bway.common.action.BaseAction;
import cn.bway.common.dao.HibernateSessionFactory;

/**
 * @author Kson
 *
 */
public class AddBookmanagerAction extends BaseAction {

	/** 
	 * Method execute
	 * @param mapping
	 * @param form
	 * @param request
	 * @param response
	 * @return ActionForward
	 * @throws UnsupportedEncodingException 
	 * @throws Exception
	 */
	
	public ActionForward execute(ActionMapping mapping,
				ActionForm form,HttpServletRequest request,	HttpServletResponse response)
				throws BwayHibernateException, UnsupportedEncodingException {
		ActionErrors errors = new ActionErrors();
		String returnStr = WebConstant.FORWARD_SUCCESS;
		Session sess=null;
		Transaction tx=null;
		
		//request.setCharacterEncoding("gb2312");
		String menuid = request.getParameter("menuid");
		String treename = request.getParameter("treename");
		
		System.out.println("the treename:  "+treename);
		
		try {
			sess=HibernateSessionFactory.currentSession();
			tx=sess.beginTransaction();
			
			//求出当前最大的值
			String maxvalue = getMaxValue(sess);
			Bookmanager b = new Bookmanager();
			b.setMenuid(maxvalue);
			b.setMenuname(treename);
			b.setMunefatherid(menuid);
			b.setMenuurl("bookmanager url");
			
			sess.save(b);
			tx.commit();
			
			returnStr=WebConstant.FORWARD_SUCCESS;
			request.setAttribute(WebConstant.RETURN_Message,"添加成功!");
		} catch (Exception e) {
			returnStr=WebConstant.FORWARD_FAIL;
			errors.add(ActionErrors.GLOBAL_ERROR,new ActionError("edu.system.excption",e.getMessage()));
			this.saveErrors(request,errors);
			tx.rollback();
			e.printStackTrace();
		}finally{
			HibernateSessionFactory.closeSession();
    	}
		return mapping.findForward(returnStr);
	}
	
	//求出当前最大值
	public static String getMaxValue(Session sess)  throws BwayHibernateException {
		String maxvalue  ="";
		PreparedStatement stat = null;
		ResultSet rs = null;
		String sql = "";
		try{
			sql = " select MAX(id) as maxvalue from bookmanager ";
			stat = sess.connection().prepareStatement(sql);
			rs = stat.executeQuery();
			if(rs.next())
				maxvalue = rs.getString("maxvalue");
			else
				maxvalue="0";
		}catch(Exception e){
			e.printStackTrace();
		}
		return maxvalue;
	}
}