我已经通过代码在本地系统中上传文件。我有文件夹值null，并在上传文件后，它存储了为什么我在位置Liferay/tomcat/Root/webapps/My portletname/提到了空文件夹？
我的view.jsp就在这里。
<%@ taglib uri="http://java.sun.com/portlet_2_0" prefix="portlet"%>
<%@ taglib uri="http://liferay.com/tld/aui" prefix="aui"%>
<%@ taglib uri="http://liferay.com/tld/ui" prefix="liferay-ui"%>
<%@ page import="com.liferay.portal.kernel.util.ParamUtil"%>
<%@ page import="com.liferay.portal.kernel.util.Validator"%>
<%@ page import="javax.portlet.PortletPreferences"%>
<%@ page import="com.liferay.util.PwdGenerator"%>
<portlet:defineObjects />
<%
String uploadProgressId = PwdGenerator.getPassword(PwdGenerator.KEY3, 4);
PortletPreferences prefs = renderRequest.getPreferences();
%>
<portlet:actionURL var="editCaseURL" name="uploadCase">
<portlet:param name="jspPage" value="/edit.jsp" />
</portlet:actionURL>
<liferay-ui:error key="error"
message="Sorry, an error prevented the upload. Please try again." />
<liferay-ui:upload-progress
id="<%= uploadProgressId %>"
message="uploading"
redirect="<%= editCaseURL %>"
/>
<aui:form action="<%= editCaseURL %>" enctype="multipart/form-data" method="post" >
<select>
<option value="store">Store</option>
<option value="floor">Floor</option>
<option value="department">Department</option>
</select>
<aui:input type="file" name="fileName" size="75"/>
<input type="submit" value="<liferay-ui:message key="upload" />" onClick="<%= uploadProgressId %>.startProgress(); return true;"/>
<!-- aui:button type="submit" value="Save" /-->
</aui:form>
<br />
<portlet:renderURL var="viewCaseURL">
<portlet:param name="jspPage" value="/view2.jsp" />
</portlet:renderURL>
<aui:button onClick="<%=viewCaseURL%>" value="view Uploaded Doc" />
我的控制器在这里：
package com.upload.doc;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import javax.portlet.ActionRequest;
import javax.portlet.ActionResponse;
import javax.portlet.PortletException;
import com.liferay.portal.kernel.servlet.SessionErrors;
import com.liferay.portal.kernel.servlet.SessionMessages;
import com.liferay.portal.kernel.upload.UploadPortletRequest;
import com.liferay.portal.kernel.util.FileUtil;
import com.liferay.portal.util.PortalUtil;
import com.liferay.util.bridges.mvc.MVCPortlet;
public class DocUpload extends MVCPortlet {
public void uploadCase(ActionRequest actionRequest, ActionResponse actionRresponse) throws PortletException,IOException {
String folder = getInitParameter("uploadFolder");
String realPath = getPortletContext().getRealPath("/");
System.out.println("RealPath" + realPath +"\\" + folder);
try {
UploadPortletRequest uploadRequest = PortalUtil.getUploadPortletRequest(actionRequest);
System.out.println("Size: "+uploadRequest.getSize("fileName"));
if (uploadRequest.getSize("fileName")==0) {SessionErrors.add(actionRequest, "error");}
String sourceFileName = uploadRequest.getFileName("fileName");
File file = uploadRequest.getFile("fileName");
System.out.println("Name file:" + uploadRequest.getFileName("fileName"));
File newFolder = null;
newFolder = new File(realPath +"\\" + folder);
if(!newFolder.exists()){
newFolder.mkdir();
}
File newfile = null;
newfile = new File(newFolder.getAbsoluteFile()+"\\"+sourceFileName);
System.out.println("New file name: " + newfile.getName());
System.out.println("New file path: " + newfile.getPath());
InputStream in = new BufferedInputStream(uploadRequest.getFileAsStream("fileName"));
FileInputStream fis = new FileInputStream(file);
FileOutputStream fos = new FileOutputStream(newfile);
byte[] bytes_ = FileUtil.getBytes(in);
int i = fis.read(bytes_);
while (i != -1) {
fos.write(bytes_, 0, i);
i = fis.read(bytes_);
}
fis.close();
fos.close();
Float size = (float) newfile.length();
System.out.println("file size bytes:" + size);
System.out.println("file size Mb:" + size / 1048576);
System.out.println("File created: " + newfile.getName());
SessionMessages.add(actionRequest, "success");
} catch (FileNotFoundException e) {
System.out.println("File Not Found.");
e.printStackTrace();
SessionMessages.add(actionRequest, "error");
} catch (NullPointerException e) {
System.out.println("File Not Found");
e.printStackTrace();
SessionMessages.add(actionRequest, "error");
}
catch (IOException e1) {
System.out.println("Error Reading The File.");
SessionMessages.add(actionRequest, "error");
e1.printStackTrace();
}
}
}
我的portlet.xml在这里：
<?xml version="1.0"?>
<portlet-app xmlns="http://java.sun.com/xml/ns/portlet/portlet-app_2_0.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/portlet/portlet-app_2_0.xsd http://java.sun.com/xml/ns/portlet/portlet-app_2_0.xsd" version="2.0">
<portlet>
<portlet-name>docupload</portlet-name>
<display-name>Docupload</display-name>
<portlet-class>com.upload.doc.DocUpload</portlet-class>
<init-param>
<name>view-template</name>
<value>/view.jsp</value>
</init-param>
<expiration-cache>0</expiration-cache>
<supports>
<mime-type>text/html</mime-type>
</supports>
<portlet-info>
<title>Docupload</title>
<short-title>Docupload</short-title>
<keywords>Docupload</keywords>
</portlet-info>
<security-role-ref>
<role-name>administrator</role-name>
</security-role-ref>
<security-role-ref>
<role-name>guest</role-name>
</security-role-ref>
<security-role-ref>
<role-name>power-user</role-name>
</security-role-ref>
<security-role-ref>
<role-name>user</role-name>
</security-role-ref>
</portlet>
</portlet-app>
答案 0 :(得分：1)
让我回答你的问题，不回答它，但指出你所犯的潜在设计错误：
最佳做法是不将任何内容上传到您的webapplication文件夹中。这有多种原因：
fileexplorer.jsp上传到您的appserver，然后通过浏览器访问该文件。或者，有人注入/WEB-INF/lib/attacking-code.jar 所有这些原因促使我建议您不要寻找解决您所说的问题的方法。您有一个潜在的问题需要解决。
在应用程序服务器之外找到存储数据的位置。重新设计您的应用程序，使其不依赖于自己webcontext中的上传文件。也许所述的上传问题就会消失。如果没有，请再次询问，然后再使用新的上下文。