applet获取ObjectInputStream传过来的jasperPrint对象不成功，但是没报错。请教。

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applet获取ObjectInputStream传过来的jasperPrint对象不成功，但是没报错。请教。5

servlet代码：

public class PrintTicketServlet extends HttpServlet { private static final long serialVersionUID = 63685217401879285L; Logger logger = LoggerFactory.getLogger(PrintTicketServlet.class); public PrintTicketServlet() { super(); } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doPost(request, response); } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { ObjectInputStream ois = null; ObjectOutputStream oos = null; try { //通过输入流获取请求参数 ois = new ObjectInputStream(request.getInputStream()); Map<String, String> params = (Map<String, String>) ois.readObject(); String strInfo = params.get("ticketInfo"); String strDetailList = params.get("details"); //将JSON格式的请求参数转化成实体类 JSONObject jInfo = JSONObject.fromObject(strInfo); JSONObject jObject = JSONObject.fromObject(strDetailList); JSONArray jDetails = jObject.getJSONObject("list").getJSONArray("source"); TicketInfo ticketInfo = (TicketInfo) JSONObject.toBean(jInfo, TicketInfo.class); List<TicketDetail> details = JSONArray.toList(jDetails, TicketDetail.class); this.setDetails(ticketInfo,details); ticketInfo.setDetails(details); //调用service获取JasperPrint对象 JasperPrint jasperPrint = new TaxInfoServiceImpl().getJasperPrint(new TicketInfo()); if (jasperPrint == null) { logger.error("生成jasperPrint对象为空"); } //通过输出流返回JasperPrint对象 response.setContentType("application/octet-stream"); oos = new ObjectOutputStream(response.getOutputStream()); oos.writeObject(jasperPrint); oos.flush(); } catch (Exception e) { logger.error(e.toString()); } finally { if (ois != null) { ois.close(); } if (oos != null) { oos.close(); } } } }

applet代码：

public class PrintTicketApplet extends JApplet {

private static final long serialVersionUID = 871447586454123188L;

private static final String ADDRESS = "PrintTicketServlet";

public boolean printTicket(String ticketInfoJson, String ticketDetailJson) throws Exception {

URL url = null;

HttpURLConnection conn = null;

ObjectInputStream ois = null;

ObjectOutputStream oos = null;

JasperPrint jasperPrint = null;

boolean success = false;

try {

//连接Servlet

url = new URL(getCodeBase(), ADDRESS);

conn = (HttpURLConnection) url.openConnection();

conn.setDoInput(true);

conn.setDoOutput(true);

conn.setUseCaches(false);

conn.setRequestMethod("POST");

conn.setRequestProperty("Content-type", "application/octet-stream");

//组装参数并发送请求到Servlet

Map<String, String> params = new HashMap<String, String>();

params.put("ticketInfo", ticketInfoJson);

params.put("details", ticketDetailJson);

oos = new ObjectOutputStream(conn.getOutputStream());

oos.writeObject(params);

oos.flush();

//获取返回的JasperPrint对象

ois = new ObjectInputStream(conn.getInputStream());

JOptionPane.showMessageDialog(this, "1、获取到输入流对象：" + ois);

jasperPrint = (JasperPrint) ois.readObject();

//applet运行到这个地方就不再继续下去了，是什么原因。readObject不成功。但是在eclipse中 run as Applet是成功的。而在浏览器上运行就不能继续执行了。

JOptionPane.showMessageDialog(this, "2、获取到jasperPrint对象：" + jasperPrint);

//打印JasperPrint对象

success = JasperPrintManager.printReport(jasperPrint, true);

JOptionPane.showMessageDialog(this, "3、成功打印：" + success);

} catch (Exception e) {

e.printStackTrace();

JOptionPane.showMessageDialog(this, e.toString());

} finally {

if (ois != null) {

ois.close();

}

if (oos != null) {

oos.close();

}

if (jasperPrint != null) {

jasperPrint = null;

}

return success;

}

2012年5月17日 12:11

dream_sail
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