logexportservlet.java

杰表服务器 部分源码 杰创网络报表(简称“杰表”)是一款国产的网络报表开发工具

package servlet;

import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.log4j.Logger;

import com.jatools.core.ZDataProvider;
import com.jatools.core.ZPrinterListener;
import com.jatools.core.ZReportEvent;
import com.jatools.core.ZReportJob;
import com.jatools.core.ZReportServer;


/**
 * @author java
 *
 * TODO To change the template for this generated type comment go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
public class LogExportServlet extends HttpServlet {
    /**
     * DOCUMENT ME!
     *
     * @param request DOCUMENT ME!
     * @param response DOCUMENT ME!
     *
     * @throws ServletException DOCUMENT ME!
     * @throws IOException DOCUMENT ME!
     */
    public void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
        String file = request.getParameter("file");

        if (file == null) {
            throw new ServletException("请指定报表模板文件.");
        }

        ZReportJob job = null;

        try {
            job = ZReportServer.createJob(new FileInputStream(file));
            job.setParameter("file", file);
        } catch (Exception ex) {
            throw new ServletException(ex);
        }

    

        //挂接日志监听器
        job.addPrinterListener(new LoggerListener());

        String as = request.getParameter("as");

        if ("pdf".equals(as)) {
            job.setParameter("as", "pdf");

            try {
                ByteArrayOutputStream ba = new ByteArrayOutputStream();

                job.printAsPDF(ba);
                response.setContentType("application/pdf");

                response.setContentLength(ba.size());

                ServletOutputStream sos = response.getOutputStream();
                ba.writeTo(sos);
                sos.flush();
            } catch (Exception ex) {
                throw new ServletException(ex);
            }
        } else {
            job.setParameter("as", "dhtml");
            response.setContentType("text/html;charset=UTF-8");

            PrintWriter out = response.getWriter();

            try {
                job.printAsDHTML(new TempDirHelper(request),out);
            } catch (Exception ex) {
                throw new ServletException(ex);
            }
        }
    }
}


class LoggerListener implements ZPrinterListener {
    private static Logger logger = Logger.getLogger("LoggerListener");

    /**
     * DOCUMENT ME!
     *
     * @param e DOCUMENT ME!
     */
    public void beginPrintReport(ZReportEvent e) {
        // TODO Auto-generated method stub
    }

    /* (non-Javadoc)
     * @see com.jatools.core.ZPrinterListener#beginPrintPage(com.jatools.core.ZReportEvent)
     */
    public void beginPrintPage(ZReportEvent e) {
        // TODO Auto-generated method stub
    }

    /* (non-Javadoc)
     * @see com.jatools.core.ZPrinterListener#endPrintPage(com.jatools.core.ZReportEvent)
     */
    public void endPrintPage(ZReportEvent e) {
        // TODO Auto-generated method stub
    }

    /**
     * DOCUMENT ME!
     *
     * @param e DOCUMENT ME!
     */
    public void endPrintReport(ZReportEvent e) {
        ZDataProvider dataProvider = e.getDataProvider();

        String msg = "表求格式 : " + dataProvider.getValue("as") + "\t";
        msg += ("文件名   : " + dataProvider.getValue("file") + "\t");
        msg += ("页数     : " + (e.getPageIndex()));

        logger.error(msg);
    }
}