📄 jasperprintservlet.java

📁 tomcat最新安装程序
💻 JAVA
字号:
package servlets;

import datasource.*;
import dori.jasper.engine.*;
import dori.jasper.engine.util.*;

import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;


/**
 *
 */
public class JasperPrintServlet extends HttpServlet
{


	/**
	 *
	 */
	public void service(
		HttpServletRequest request,
		HttpServletResponse response
		) throws IOException, ServletException
	{
		ServletContext context = this.getServletConfig().getServletContext();

		HttpSession session=request.getSession();
		String path=(String) session.getAttribute("reportUrl");
		File reportFile = new File(context.getRealPath(path));
				
			
		Map parameters = new HashMap();
		parameters=(HashMap)session.getAttribute("parameters");
		parameters.put("BaseDir", reportFile.getParentFile());
		
		Object[][] data =(Object[][])session.getAttribute("data");
		WebappDataSource webappDataSource=new WebappDataSource();
		webappDataSource.setData(data);
					
		JasperPrint jasperPrint = null;

		try
		{
			JasperReport jasperReport = (JasperReport)JRLoader.loadObject(reportFile.getPath());
			
			jasperPrint = 
				JasperFillManager.fillReport(
					jasperReport,
					parameters, 
					webappDataSource
					);
		}
		catch (JRException e)
		{
			response.setContentType("text/html");
			PrintWriter out = response.getWriter();
			out.println("<html>");
			out.println("<head>");
			out.println("<title>JasperReports - Web Application Sample</title>");
			out.println("<link rel=\"stylesheet\" type=\"text/css\" href=\"../stylesheet.css\" title=\"Style\">");
			out.println("</head>");
			
			out.println("<body bgcolor=\"white\">");

			out.println("<span class=\"bnew\">JasperReports encountered this error :</span>");
			out.println("<pre>");

			e.printStackTrace(out);

			out.println("</pre>");

			out.println("</body>");
			out.println("</html>");

			return;
		}

		if (jasperPrint != null)
		{
			response.setContentType("application/octet-stream");
			ServletOutputStream ouputStream = response.getOutputStream();
			
			ObjectOutputStream oos = new ObjectOutputStream(ouputStream);
			oos.writeObject(jasperPrint);
			oos.flush();
			oos.close();

			ouputStream.flush();
			ouputStream.close();
		}
		else
		{
			response.setContentType("text/html");
			PrintWriter out = response.getWriter();
			out.println("<html>");
			out.println("<head>");
			out.println("<title>JasperReports - Web Application Sample</title>");
			out.println("<link rel=\"stylesheet\" type=\"text/css\" href=\"../stylesheet.css\" title=\"Style\">");
			out.println("</head>");
			
			out.println("<body bgcolor=\"white\">");
	
			out.println("<span class=\"bold\">Empty response.</span>");
	
			out.println("</body>");
			out.println("</html>");
		}
	}


}
⌨️ 快捷键说明

复制代码 Ctrl + C
搜索代码 Ctrl + F
全屏模式 F11
切换主题 Ctrl + Shift + D
显示快捷键 ?
增大字号 Ctrl + =
减小字号 Ctrl + -