jspSmartUpload上传路径不存在

今天改造一个上传的Jsp成servlet，其实就是一回事。用到了jspSmartUpload，执行到 file.saveAs("/upload/ChatFile/" + fileName); 的时候，一直报

java.lang.IllegalArgumentException: This path does not exist (1135).
at com.jspsmart.upload.SmartUpload.getPhysicalPath(SmartUpload.java:656)
at com.jspsmart.upload.File.saveAs(File.java:91)
at com.jspsmart.upload.File.saveAs(File.java:65)
at com.szkingdom.webproxy.FileuploadServlet.doPost(FileuploadServlet.java:69)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:217)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:673)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2503)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2492)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:722)

最后才知道存放的目录是从 webapps/项目名开始的，不能放在web-inf下面。如:

tomcat/webapps/myproject/uploiad/ChatFile  正确

tomcat/webapps/myproject/web-inf/uploiad/ChatFile  错误

这不智能，其实你可以自动创建这个文件夹，非得事先创建好。

另外JSP改Servlet时，Html和Javascript都是通过PrintWriter对象输出的，脚本的开始标签和结束标签都是不能少的，参数的单引号不能少，每条语句字符串后面还要加上分号 ;

PrintWriter out = response.getWriter();
out.println(""); // js结束