generalaction.java

报表,关于ireport报表的一些源码(转)

package cn.edu.hlju.oa.kygl.action;

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

import java.io.*;
import java.util.Properties;
import net.sf.jasperreports.engine.JasperPrint;
import net.sf.jasperreports.j2ee.servlets.ImageServlet;
import java.util.TreeMap;
import cn.edu.hlju.oa.kygl.db.DBConnection;
import java.sql.*;

/**
 * 抽象的动作类，用于定义一些公用的部分
 */
public abstract class GeneralAction extends HttpServlet
{
    //新更改的StyleBit*******************
    protected final int ERR     = 0x0001;
    protected final int DEFAULT = 0x0002;
    protected final int ADD     = 0x0004;
    protected final int DELETE  = 0x0008;
    protected final int MODIFY  = 0x0010;
    protected final int SAVE    = 0x0020;

    //下一页的动作
    protected final int NEXT_PAGE = 0x0040; //表示分页处理
    protected final int ENTRY = 0x0080;     //表示单纯的进入
    protected final int ADD_INVALID = 0x0100;
    protected final int DELETE_INVALID = 0x0200;
    protected final int MODIFY_INVALID = 0x0400;
    protected final int SAVE_INVALID = 0x0800;

    protected final int REPORT_QUERY = 0x1000;//表示进入报表查询页面
    protected final int REPORT_PREVIEW = 0x2000;//表示进入报表生成
    protected final int REPORT_PRINT = 0x4000;  //要打印报表
    protected final int REPORT_EXPORT = 0x8000; //要导出报表
        protected final int REPORT_EXPORT_PDF = 0x8001; //导出成PDF
        protected final int REPORT_EXPORT_RTF = 0x8002; //导出成RTF
        protected final int REPORT_EXPORT_XLS = 0x8003; //导出成XLS
    protected final int STATISTIC_ACTION= 0x10000;
        protected final int STATISTIC_QUERY = 0x10001;      //进入查询页面
        protected final int STATISTIC_WHOLE = 0x10002;     //查询整体的情况
          protected final int STATISTIC_PROJECT = 0x10003; //查询整体/重点实验室的项目情况
          protected final int STATISTIC_AWARD   = 0x10004; //查询整体/重点实验室的获奖情况
          protected final int STATISTIC_RESULT  = 0x10005; //查询整体/重点实验室的成果情况
          protected final int STATISTIC_ARTICLE = 0x10006; //查询整体/重点实验室的著作情况
          protected final int STATISTIC_PAPER   = 0x10007; //查询整体/重点实验室的论文情况


    //用于记录当前的动作类型
    protected int actionType;
    //动作页的url
    protected String actionPage;

    //server的IP地址
    public static String serverIPAddress;
    //server的端口号
    public static String serverPort;

    static{
        System.out.println("GereralAction user.dir="+System.getProperty("user.dir"));
        System.out.println("GeneralAction catalina.base="+System.getProperty("catalina.base"));
        String kyglAppPath = System.getProperty("catalina.base")+"/webapps/kygl/Config/";
        Properties prop = new Properties();
        try{
            prop.load(new FileInputStream(new File(kyglAppPath + "SysInfo.properties")));
            System.out.println("成功读取配置文件....");
        }catch(Exception e){
            System.err.println("GeneralAction不能正确读取配置信息,写入默认配置....");
            prop.put("serverIPAddress","210.46.111.23");
            prop.put("serverPort","8083");
        }
        serverIPAddress = prop.getProperty("serverIPAddress");
        serverPort = prop.getProperty("serverPort");
    }

    public GeneralAction()    {
        //构造函数无特殊功能
    }

    /**
     * 缺省要实现的方法
     */
    public void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException,IOException{
        try{
            process(request,response);
        }catch(Exception e){
            e.printStackTrace();
            //一旦发生异常就转到错误页面
            RequestDispatcher rd=request.getRequestDispatcher("Err.html");
            request.setAttribute("errMsg",e.getMessage());
            rd.forward(request,response);
        }
    }

    public void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException,IOException{
        doPost(request,response);
    }


    protected void process(HttpServletRequest request, HttpServletResponse response)
    throws Exception {
        preProcess(request,response);
        validate(request,response);
        executeBusiniess(request,response);
        reDirection(request,response);
    }


    /**
     * 一些预处理操作
     * @param request HttpServletRequest
     * @param response HttpServletResponse
     * @throws Exception
     */
    abstract void preProcess(HttpServletRequest request, HttpServletResponse response) throws Exception;


    /**
     * 验证操作
     * @param request HttpServletRequest
     * @param response HttpServletResponse
     * @throws Exception
     */
    abstract void validate(HttpServletRequest request, HttpServletResponse response) throws Exception;


    /**
     * 执行业务逻辑的操作
     * @param request HttpServletRequest
     * @param response HttpServletResponse
     * @throws Exception
     */
    abstract void executeBusiniess(HttpServletRequest request, HttpServletResponse response) throws Exception;


    /**
     * 进行页面的重定向
     * @param request HttpServletRequest
     * @param response HttpServletResponse
     * @throws Exception
     */
    void reDirection(HttpServletRequest request, HttpServletResponse response) throws Exception{
    	RequestDispatcher rd=request.getRequestDispatcher(actionPage);
        //ServletContext context = getServletContext();
        //RequestDispatcher rd = context.getRequestDispatcher("/"+actionPage);
        //rd.forward( request, response);
        rd.forward(request,response);
    }

}