aadminhistory.java

在线模拟选课系统

/*
 * This product includes software developed by the
 * Apache Software Foundation (http://www.apache.org/).
 */
package ch07.action;

import java.io.*;
import java.util.*;

import javax.servlet.*;
import javax.servlet.http.*;

import ch07.*;
import ch07.object.unit.*;
import ch07.logic.*;
import ch07.global.*;
import ch07.database.*;

/**
 * 针对管理历史记录页面的Servlet
 * @author ShenYK
 * @version 1.0
 */
public class AAdminHistory
{
    //查看某一具体分类的历史成绩
    public void doView( Hashtable inputData, 
                         Hashtable outputData,
                         HttpSession mySession )
        throws Exception
    {
        //首先获得当前选择的分类
        String sCategoryId = (String)inputData.get("categoryId");
        
        //调用对应的logic类
        LRecord lRecord = (LRecord)GlobalObjectProvider.getLogicService(CommonConst.LOGIC_KEY_RECORD);
        
        //如果对应的类没有的话,报错并返回目录页面
        if ( lRecord == null )
        {
            outputData.put( "pageId", CommonConst.VIEWID_ADMIN_MENU );
            outputData.put( "errMsg", "发生了内部错误，请联系技术人员！" );
            return;
        }
        
        //获得该分类对应的历史成绩分布
        Vector vRecords = lRecord.getAllRecords( sCategoryId );
        
        //调用对应的logic类再次获得对应的分类信息
        LCategory lCategory = (LCategory)GlobalObjectProvider.getLogicService(CommonConst.LOGIC_KEY_CATEGORY);
        
        //如果对应的类没有的话,报错并返回目录页面
        if ( lCategory == null )
        {
            outputData.put( "pageId", CommonConst.VIEWID_ADMIN_MENU );
            outputData.put( "errMsg", "发生了内部错误，请联系技术人员！" );
            return;
        }
        
        Vector vCategorys = lCategory.getAllCategory();
        
        //设置值域，返回
        outputData.put( "categorys", vCategorys );
        outputData.put( "selectedCategory", sCategoryId );
        outputData.put( "records", vRecords );
        outputData.put( "pageId", CommonConst.VIEWID_ADMIN_HISTORY );
        return;
    }
}