bonjour

je veut s'avoir comment inserer le codage utf_8 dans un servlet

voila mon servlet :

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package sample.servlets;
 
import java.io.File;
import java.io.IOException;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.HashMap;
import java.util.Map;
 
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.servlet.Servlet;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.sql.DataSource;
 
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JRExporterParameter;
import net.sf.jasperreports.engine.JasperCompileManager;
import net.sf.jasperreports.engine.JasperManager;
import net.sf.jasperreports.engine.JasperPrint;
import net.sf.jasperreports.engine.JasperReport;
import net.sf.jasperreports.engine.JasperRunManager;
import net.sf.jasperreports.engine.export.JRHtmlExporter;
import net.sf.jasperreports.engine.export.JRHtmlExporterParameter;
import net.sf.jasperreports.engine.util.JRLoader;
 
/**
 * @version 	1.0
 * @author
 */
public class ReportServlet extends HttpServlet implements Servlet {
 
	private DataSource ds;
 
	/**
	* @see javax.servlet.http.HttpServlet#void (javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
	*/
	public void doGet(HttpServletRequest req, HttpServletResponse resp)
		throws ServletException, IOException {
 
		doPost(req, resp);
	}
 
	/**
	* @see javax.servlet.http.HttpServlet#void (javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
	*/
	public void doPost(HttpServletRequest req, HttpServletResponse resp)
		throws ServletException, IOException {
 
		Connection conn = null;
		Map parameters = new HashMap();
		try {
			// Get a database connection
			conn = getConnection();
 
			String reportType = req.getParameter("reportType");
			ServletContext context = getServletContext();
 
			String reportFileName = null;
 
			if (reportType.equals("basicReportHTML")
				|| reportType.equals("basicReportPDF")) {
				reportFileName = "BasicReport";
				parameters.put("state_abbr", "TX");
				parameters.put(
					"Title",
					"State Customer Report For Company XYZ");
				parameters.put(
					"BaseDir",
					new File(context.getRealPath("/images/")));
 
			} else if (
				reportType.equals("groupReportHTML")
					|| reportType.equals("groupReportPDF")) {
 
				reportFileName = "GroupReport";
				parameters.put("Title", "Customer Report For Company XYZ");
 
			} else if (
				reportType.equals("multiReportHTML")
					|| reportType.equals("multiReportPDF")) {
 
				reportFileName = "MultiReport";
				JasperReport orderHistory = getCompiledReport("OrderHistory");
				JasperReport referralHistory =
					getCompiledReport("ReferralHistory");
				parameters.put("customer_id", new Integer(9));
				parameters.put("OrderHistory", orderHistory);
				parameters.put("ReferralHistory", referralHistory);
			}
 
			JasperReport jasperReport = getCompiledReport(reportFileName);
 
			if (reportType.indexOf("HTML") >= 0) {
 
				// Create JasperPrint object using the fillReport() method in JasperManager class
				JasperPrint jasperPrint =
					JasperManager.fillReport(jasperReport, parameters, conn);
 
				generateHtmlOutput(jasperPrint, req, resp);
			}
			// Assume it is a PDF report
			else {
				generatePDFOutput(resp, parameters, jasperReport);
			}
 
		} catch (Exception e) {
			req.setAttribute("exception", e);
			getServletContext().getRequestDispatcher(
				"/jsp/exception.jsp").forward(
				req,
				resp);
		} finally {
			if (conn != null) {
				try {
					conn.close();
				} catch (SQLException sqle) {
					// Ignore
				}
			}
		}
	}
 
	private void generateHtmlOutput(
		JasperPrint jasperPrint,
		HttpServletRequest req,
		HttpServletResponse resp)
		throws IOException, JRException {
 
		Map imagesMap = new HashMap();
		req.getSession().setAttribute("IMAGES_MAP", imagesMap);
		JRHtmlExporter exporter = new JRHtmlExporter();
 
		exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);
		exporter.setParameter(JRExporterParameter.OUTPUT_WRITER,resp.getWriter());
 
		exporter.setParameter(JRHtmlExporterParameter.IMAGES_MAP, imagesMap);
		exporter.setParameter(
			JRHtmlExporterParameter.IMAGES_URI,"image?image=");
 
		exporter.exportReport();
	}
 
	private void generatePDFOutput(
		HttpServletResponse resp,
		Map parameters,
		JasperReport jasperReport)
		throws JRException, NamingException, SQLException, IOException {
 
		byte[] bytes = null;
 
		bytes =
			JasperRunManager.runReportToPdf(
				jasperReport,
				parameters,
				getConnection());
 
		resp.setContentType("application/pdf");
		resp.setContentLength(bytes.length);
		ServletOutputStream ouputStream = resp.getOutputStream();
		ouputStream.write(bytes, 0, bytes.length);
		ouputStream.flush();
		ouputStream.close();
 
	}
 
	/**
	* @see javax.servlet.GenericServlet#void ()
	*/
	public void init() throws ServletException {
 
		super.init();
 
		ServletContext context = getServletContext();
 
		// Set class path for compiling XML templates
		System.setProperty(
			"jasper.reports.compile.class.path",
			context.getRealPath("/WEB-INF/lib/jasperreports-0.6.1.jar")
				+ System.getProperty("path.separator")
				+ context.getRealPath("/WEB-INF/classes/"));
 
		// Specify a default folder for storing 
		// compiled XML templates
		System.setProperty(
			"jasper.reports.compile.temp",
			context.getRealPath("/reports/"));
 
	}
 
	/*private DataSource getDataSource() throws NamingException {
		if (ds == null) {
			Context ctx = new InitialContext();
			ds = (DataSource) ctx.lookup("jdbc/reportDB");
		                 }
		return ds;
 
 
	}*/
 
	private Connection getConnection() throws SQLException, NamingException {
		 connexion conx=new connexion();
		 conx.initialize();
		 return conx.conn ;
 
 
	}
 
	private JasperReport getCompiledReport(String fileName)
		throws JRException {
 
		File reportFile =
			new File(
				getServletContext().getRealPath(
					"/reports/" + fileName + ".jasper"));
 
		// If compiled file is not found, then
		// compile XML template
		if (!reportFile.exists()) {
			JasperCompileManager.compileReportToFile(
				getServletContext().getRealPath(
					"/reports/" + fileName + ".xml"));
		}
 
		JasperReport jasperReport =
			(JasperReport) JRLoader.loadObject(reportFile.getPath());
 
		return jasperReport;
	}
 
}

merci d'avance