急急急，百分求教一个spring和jasper的打印问题!

我只是一个coder 2013-11-12 05:10:31

我在做web前端连打印机打印的时候.用servlet 一切正常。

后来我切换成使用spring的时候。



  @RequestMapping("/print")

	public ModelAndView exportPrint(

		@RequestParam(required = true) String filename,

	HttpServletRequest request, HttpServletResponse response) {

	    	System.out.println("1111s");

打印的时候。此时没有输出 1111s
然后报错:



 at net.sf.jasperreports.engine.util.JRLoader.loadObject(JRLoader.java:188)

	at net.sf.jasperreports.engine.util.JRLoader.loadObject(JRLoader.java:166)

	at JasperReportApplet.downloadJasperPrint(JasperReportApplet.java:66)

	at JasperReportApplet.serverFillPreview(JasperReportApplet.java:114)

	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

	at java.lang.reflect.Method.invoke(Unknown Source)

	at sun.plugin.javascript.Trampoline.invoke(Unknown Source)

	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

	at java.lang.reflect.Method.invoke(Unknown Source)

	at sun.plugin.javascript.JSClassLoader.invoke(Unknown Source)

	at sun.plugin2.liveconnect.JavaClass$MethodInfo.invoke(Unknown Source)

	at sun.plugin2.liveconnect.JavaClass$MemberBundle.invoke(Unknown Source)

	at sun.plugin2.liveconnect.JavaClass.invoke0(Unknown Source)

	at sun.plugin2.liveconnect.JavaClass.invoke(Unknown Source)

	at sun.plugin2.main.client.LiveConnectSupport$PerAppletInfo$DefaultInvocationDelegate.invoke(Unknown Source)

	at sun.plugin2.main.client.LiveConnectSupport$PerAppletInfo$3.run(Unknown Source)

	at java.security.AccessController.doPrivileged(Native Method)

	at sun.plugin2.main.client.LiveConnectSupport$PerAppletInfo.doObjectOp(Unknown Source)

	at sun.plugin2.main.client.LiveConnectSupport$PerAppletInfo$LiveConnectWorker.run(Unknown Source)

	at java.lang.Thread.run(Unknown Source)

Caused by: java.io.StreamCorruptedException: invalid stream header: EFBBBF3C

	at java.io.ObjectInputStream.readStreamHeader(Unknown Source)

	at java.io.ObjectInputStream.<init>(Unknown Source)

	at net.sf.jasperreports.engine.util.ContextClassLoaderObjectInputStream.<init>(ContextClassLoaderObjectInputStream.java:58)

	at net.sf.jasperreports.engine.util.JRLoader.loadObject(JRLoader.java:183)

	... 23 more

Applet 端代码就是这一句报的错误.:



   JasperPrint jasperPrint = (JasperPrint) JRLoader.loadObject(url);

我下载了官方员源码看了下,红色部分报的错误.





 try

		{

			is = url.openStream();

			ois = new ContextClassLoaderObjectInputStream(jasperReportsContext, is);

			obj = ois.readObject();

		}

		catch (IOException e)

		{

			throw new JRException("Error loading object from URL : " + url, e);

		}