[英]java.io.FileNotFoundException: .. (No such file or directory)
[英]java.io.FileNotFoundException: (No such file or directory) - Working with servlets
我正在使用休眠和tomcat。 我所做的是創建一個具有文件輸入的表單。 在servlet中,我想將該文件轉換為byte []。 但是,當我要創建de File時,沒有目錄:它僅保存圖像的名稱,而不保存路徑。 這是錯誤:
java.io.FileNotFoundException:在control.servlets.AddGenericItem.doPost上的java.io.FileInputStream.open(本機方法)在java.io.FileInputStream。(FileInputStream.java:138)上的oldi.png(無此類文件或目錄) (AddGenericItem.java:46),位於org.apache.catalina.core的javax.servlet.http.HttpServlet.service(HttpServlet.java:728),位於javax.servlet.http.HttpServlet.service(HttpServlet.java:647)。 org.org.apache.catalina.core上的ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)org.org上的org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)上的ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)的.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve .java:171),位於org.apache.cata,位於org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99) org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)上的lina.valves.AccessLogValve.invoke(AccessLogValve.java:947)在org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java: 408)在org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1009)在org.apache.coyote.AbstractProtocol $ AbstractConnectionHandler.process(AbstractProtocol.java:589)在org.apache.tomcat.util.net .JIoEndpoint $ SocketProcessor.run(JIoEndpoint.java:310)在java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)在java.util.concurrent.ThreadPoolExecutor $ Worker.run(ThreadPoolExecutor.java:615)在java.lang.Thread.run(Thread.java:724)
HTML:
<tr>
<td>
<font class="text_title">Image: </font>
</td>
<td>
<input name="image" type="file">
</td>
</tr>
<tr>
<td>
<input type="submit" value="submit" name="ctl00$MainContent$RegisterUserWizard$CreateUserStepContainer$CreateButton"
id="ctl00_MainContent_RegisterUserWizard_CreateUserStepContainer_CreateButton"
style="border-width:0px;">
</td>
</tr>
Servlet的:
public class AddGenericItem extends HttpServlet {
@Override
protected void doPost(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse)
throws ServletException, IOException {
// HttpSession session = httpServletRequest.getSession();
DatabaseManager databaseManager = new DatabaseManager();
String name = httpServletRequest.getParameter("name");
String description = httpServletRequest.getParameter("description");
float price = Float.parseFloat(httpServletRequest.getParameter("price"));
File image = new File(httpServletRequest.getParameter("image"));
byte[] imageArray = new byte[(int) image.length()];
try {
FileInputStream fileInputStream = new FileInputStream(image);
fileInputStream.read(imageArray);
fileInputStream.close();
} catch (Exception e) {
e.printStackTrace();
}
Admin admin = (Admin) httpServletRequest.getSession().getAttribute("user");
Brand brand = admin.getBrand();
GenericItem genericItem = new GenericItem(name, description, imageArray, price,brand);
GenericItemDAO genericItemDAO = databaseManager.getGenericItemDAO();
genericItemDAO.beginTransaction();
genericItemDAO.save(genericItem);
try {
genericItemDAO.commitTransaction();
} catch (DatabaseAccessFailException e) {
e.getStackTrace();
} finally {
httpServletResponse.sendRedirect("/adminPages/items.jsp");
}
}
@Override
protected void doGet(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse)
throws ServletException, IOException {
}
@Override
protected void doDelete(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse)
throws ServletException, IOException {
}
}
希望您正在進行文件上傳。
問題在下面的行:
FileInputStream fileInputStream = new FileInputStream(image);
Servlet在服務器上查找該文件以讀取它,但那時該文件將不存在。
使用Apache提供的Commons Fileupload庫 ,可以輕松地向您的servlet和Web應用程序添加強大的,高性能的文件上傳功能。
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