jsp新手！如何用jsp实现所有类型文件的上传！跪求各位大虾帮忙

Question

我用jsp+javaBean实现文件上传，但某些文件例如.sql在上传时会出错。猜测时文件输入流有问题，求大虾帮忙

Answer 1

源码：
public String uploadFile(FormFile formFile, HttpServletRequest request,
String fullDir) throws FileNotFoundException {
FormFile file = formFile;
String fulldir = fullDir;
String url = "";
String dir = request.getSession().getServletContext().getRealPath("/")
+ fulldir;
String fileName = new String();
if (file.getFileName() != null && !"".equals(file.getFileName())) {
// 指定上传文件的位置
File uploadFile = new File(dir);
// 绝对路径
String path = uploadFile.getAbsolutePath(); // 判断指定路径dir是否存在，不存在则创建路径
if (!uploadFile.exists() || uploadFile == null) {
uploadFile.mkdirs();
}

try {
//ewr/werw/231231231.sql
fileName = System.currentTimeMillis()
+ this.subFileType(file);
url = path + "\\" + fileName;
FileOutputStream fos = new FileOutputStream(url);
if (file.getInputStream() instanceof ByteArrayInputStream) {
ByteArrayInputStream fis = (ByteArrayInputStream) file
.getInputStream();
byte[] buffer = new byte[1024 * 2];
int len = -1;
while ((len = fis.read(buffer)) != -1) {
fos.write(buffer, 0, len);
}
fis.close();
} else {
FileInputStream fis = (FileInputStream) file
.getInputStream();
byte[] buffer = new byte[1024 * 2];
int len = -1;
while ((len = fis.read(buffer)) != -1) {
fos.write(buffer, 0, len);
}
fis.close();
}
fos.flush();
fos.close();
} catch (Exception e) {
e.printStackTrace();
}
}
return new String(fullDir+"\\"+fileName);
}
会报格式匹配错误

Answer 2

哪一行报的错知道吗？你把报错的log贴出来看看，你这样说是看不出来的。

Answer 3

server 10:37:45
  严重: Servlet.service() for servlet action threw exception
java.lang.ClassCastException: java.io.ByteArrayInputStream
at com.mrk.projectmanager.web.action.DataAction.add(DataAction.java:91)
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 org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:270)
at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:187)
at com.mrk.projectmanager.web.action.BaseAction.execute(BaseAction.java:30)
at org.springframework.web.struts.DelegatingActionProxy.execute(DelegatingActionProxy.java:110)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.mrk.projectmanager.filters.PagerLocalThreadFilter.doFilter(PagerLocalThreadFilter.java:31)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:96)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Unknown Source)

Answer 4

ByteArrayInputStream改成BufferedInputStream试试
或者你直接用apache的fileupload组件
我提问的一个帖子有后台
http://topic.csdn.net/u/20091111/17/8fa87372-b003-4ebb-90fe-db3b20c08311.html
代码需要完善。

Answer 5

ByteArrayInputStream 一定要用这个吗，换个其他的文件流试试。

Answer 6

FileInputStream,FileOutputStream就能搞定呀！

Answer 7

java.lang.ClassCastException: java.io.ByteArrayInputStream 

Answer 8

你这个错误是在
com.mrk.projectmanager.web.action.DataAction.add(DataAction.java:91) 这个方法里报的类型转换错误.上这个方法的91行看去