ilabvisitorscholaraction.java

报表,关于ireport报表的一些源码(转)

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

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
import net.sf.jasperreports.engine.JasperPrint;
import net.sf.jasperreports.engine.JasperReport;
import cn.edu.hlju.oa.kygl.print.SRDataSourceFactory;
import net.sf.jasperreports.engine.JasperFillManager;
import net.sf.jasperreports.engine.util.JRLoader;
import net.sf.jasperreports.engine.JRRuntimeException;
import cn.edu.hlju.oa.kygl.db.DBConnection;
import cn.edu.hlju.oa.kygl.util.GlobalUtil;

public class ILabVisitorScholarAction extends GeneralAction {
    /**
    * 一些预处理操作
    *
    * @param request HttpServletRequest
    * @param response HttpServletResponse
    * @throws Exception
    * @todo Implement this cn.edu.hlju.oa.kygl.action.GeneralAction method
    */
   void preProcess(HttpServletRequest request, HttpServletResponse response) throws Exception {
       request.setCharacterEncoding("UTF-8");

       String action=request.getParameter("action");
         if( action == null)
             action = "reportQuery";

         if( action.equals("reportQuery")){
             actionType=REPORT_QUERY;
             actionPage="ILabOnlyQuery.jsp";
         }else if(action.equals("reportPreview")){
             actionType=REPORT_PREVIEW;
              //进入到打印预览页面
             actionPage="GeneralHTMLReportViewer.jsp";
          }
   }

   /**
    * 验证操作
    *
    * @param request HttpServletRequest
    * @param response HttpServletResponse
    * @throws Exception
    * @todo Implement this cn.edu.hlju.oa.kygl.action.GeneralAction method
    */
   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
    * @todo Implement this cn.edu.hlju.oa.kygl.action.GeneralAction method
    */
   void executeBusiniess(HttpServletRequest request, HttpServletResponse response) throws Exception {
       switch (actionType) {
       case REPORT_QUERY:{
           TreeMap map = GlobalUtil.getILabInfo("001");
           request.setAttribute("QueryTitle","访问学者信息");
           request.setAttribute("ActionName","ILabVisitorScholarAction");
           request.setAttribute("ILabInfo",map);
       }
       break;
       case REPORT_PREVIEW: {
           ServletContext context = this.getServletConfig().getServletContext();
           String filePath = context.getRealPath("/Reports/访问学者情况/访问学者情况.jasper");
           //获得重点实验室的编码
           String iLabBm = request.getParameter("ILabSelection");

           //生成对Jasper文件的引用
           File reportFile = new File(filePath);
           if (!reportFile.exists())
               throw new JRRuntimeException(
                       "File WebappReport.jasper not found. The report design must be compiled first.");

           //报表装填
           JasperReport jasperReport = (JasperReport) JRLoader.loadObject(reportFile.getPath());
           Map parameters = new HashMap();

           JasperPrint jasperPrint =
                   JasperFillManager.fillReport(
                           jasperReport,
                           parameters,
                           SRDataSourceFactory.createILabVisitorScholarDS(iLabBm)
                   );
           //JasperViewer.viewReport(jasperPrint, false);
           request.getSession().setAttribute("JasperPrint", jasperPrint);
           request.getSession().setAttribute("pageTitle","访问学者情况");
       }
       break;
     }
 }

}