java 支持超大上G , 多附件上传

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首先确定要上传的目录

WEB.XML 文件

Java代码

<listener>
<listener-class>
org.apache.commons.fileupload.servlet.FileCleanerCleanup
</listener-class>
</listener>
<context-param>
<param-name>tempXlsPath</param-name>
<param-value>/WEB-INF/temp/</param-value>
</context-param>
<servlet>
<servlet-name>UploadServlet</servlet-name>
<servlet-class>
com.thams.web.fileServlet.UploadServlet
</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>UploadServlet</servlet-name>
<url-pattern>/servlet/UploadServlet</url-pattern>
</servlet-mapping>

servlet

Java代码

package com.thams.web.fileServlet;
import java.io.File;
import java.io.IOException;
import java.util.List;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileItemFactory;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.FileCleanerCleanup;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.io.FileCleaningTracker;
import org.apache.commons.io.FilenameUtils;
import org.apache.log4j.Logger;
/**
* @author serv
*/
public class UploadServlet extends HttpServlet {
private static Logger log = Logger.getLogger(UploadServlet.class);
protected void service(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
// Check that we have a file upload request
boolean isMultipart = ServletFileUpload.isMultipartContent(request);
if (!isMultipart) {
log.debug("没有可上传的文件, 你想干什么 !");
return;
}
// Create a factory for disk-based file items
String tempFilePath = getServletContext().getRealPath("/")+getServletContext().getInitParameter("tempXlsPath");
FileItemFactory factory = newDiskFileItemFactory(getServletContext(), new File(tempFilePath));
// Create a new file upload handler
ServletFileUpload upload = new ServletFileUpload(factory);
upload.setHeaderEncoding("UTF-8");
/* FileItem */
List<FileItem> items = null;
try {
// Parse the request
items = (List<FileItem>) upload.parseRequest(request);
String filename = null;
for (FileItem fileItem : items) {
if (!fileItem.isFormField()){//file
filename = FilenameUtils.getName(fileItem.getName());
fileItem.write(new File(tempFilePath+filename));
response.getWriter().write(tempFilePath+filename+"<br>");
}
}
} catch (FileUploadException e) {
log.error(e.getMessage());
} catch (Exception e) {
log.error(e.getMessage());
}
}
/**
* The FileCleanerCleanup provides an instance of org.apache.commons.io.FileCleaningTracker.
* This instance must be used when creating a org.apache.commons.fileupload.disk.DiskFileItemFactory.
*/
public static DiskFileItemFactory newDiskFileItemFactory(
ServletContext context, File repository) {
FileCleaningTracker fileCleaningTracker = FileCleanerCleanup
.getFileCleaningTracker(context);
DiskFileItemFactory factory = new DiskFileItemFactory(
DiskFileItemFactory.DEFAULT_SIZE_THRESHOLD, repository);
factory.setFileCleaningTracker(fileCleaningTracker);
return factory;
}
}

测试页面

Java代码

<form action="servlet/UploadServlet" method="post" enctype="multipart/form-data">
<input id="file1" name="file1" type="file" class="input400"><br>
<input id="file2" name="file2" type="file" class="input400"><br>
<input id="file3" name="file3" type="file" class="input400"><br>
<input id="file4" name="file4" type="file" class="input400"><br>
<input type="submit" id="submit" value="提交" />
</form>

测试结果