急求一份文件上传代码,要求尽量简洁,快速! 小弟没分了,我现在需要将一个excel文件传到服务器上,再将其存入数据库。请大牛指点! 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 package com.zgm.servlet;import java.io.IOException;import java.io.PrintWriter;import javax.servlet.ServletConfig;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.apache.commons.fileupload.*;import java.util.*;import java.util.regex.*;import java.io.*;import org.apache.commons.fileupload.servlet.*;import org.apache.commons.fileupload.disk.DiskFileItemFactory;public class FileUpload extends HttpServlet { private String uploadPath = ""; @Override public void init(ServletConfig config) throws ServletException { uploadPath = config.getInitParameter("uploadPath"); } public void doPost(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException { res.setContentType("text/html; charset=GB2312"); PrintWriter out = res.getWriter(); System.out.println("req.getContentLength() = " + req.getContentLength()); System.out.println("req.getContentType() = " + req.getContentType()); DiskFileItemFactory factory = new DiskFileItemFactory(); // maximum size that will be stored in memory factory.setSizeThreshold(4096); // the location for saving data that is larger than getSizeThreshold() factory.setRepository(new File("d:\\temp")); ServletFileUpload upload = new ServletFileUpload(factory); // maximum size before a FileUploadException will be thrown upload.setSizeMax(1000000); try { List fileItems = upload.parseRequest(req); Iterator iter = fileItems.iterator(); // 正则匹配,过滤路径取文件名 String regExp = ".+\\\\(.+)$"; // 过滤掉的文件类型 String[] errorType = { ".exe", ".com", ".cgi", ".asp" }; Pattern p = Pattern.compile(regExp); while (iter.hasNext()) { FileItem item = (FileItem) iter.next(); // 忽略其他不是文件域的所有表单信息 if (!item.isFormField()) { String name = item.getName(); // name 文件的名字 long size = item.getSize(); // size 文件的大小 if ((name == null || name.equals("")) && size == 0) continue; Matcher m = p.matcher(name); boolean result = m.find(); if (result) { for (int temp = 0; temp < errorType.length; temp++) { if (m.group(1).endsWith(errorType[temp])) { throw new IOException(name + ": wrong type"); } } try { // 保存上传的文件到指定的目录 // 在下文中上传文件至数据库时,将对这里改写 item.write(new File(uploadPath + m.group(1))); out.print(name + " " + size + "<br>"); } catch (Exception e) { out.println(e); } } else { throw new IOException("fail to upload"); } } } } catch (IOException e) { out.println(e); } catch (FileUploadException e) { out.println(e); } // 保存上传的文件到指定的目录 // 在下文中上传文件至数据库时,将对这里改写 }}注意两点:1 web.xml 中配置 <servlet> <servlet-name>FileUpload</servlet-name> <servlet-class>com.zgm.servlet.FileUpload</servlet-class> <init-param> <param-name>uploadPath</param-name> <param-value>D:\temp\image\</param-value> </init-param> </servlet>2 导入org.apache.commons.fileupload包 <form action="/workflowAction" enctype="multipart/form-data"><INPUT TYPE=FILE SIZE=60 NAME="FILE">上述中form表达一定要加enctype="multipart/form-data"这个属性后台java代码缩略是:在DocumentForm中定义私有成员private FormFile contextFile;FormFile是struts的下载类import org.apache.struts.upload.FormFileDocumentForm df = (DocumentForm)form; FormFile formFile = df.getContextFile(); byte[] bytes = formFile.getFileData();document.setContent(bytes); 前台页面form 的 enctype 属性为 "multipart/form-data"后台处理程序如下:SmartUpload mySmartUpload = new SmartUpload();mySmartUpload.initialize(pageContext);mySmartUpload.setTotalMaxFileSize(10485760);//设置最大10MmySmartUpload.setAllowedFilesList("xls");mySmartUpload.upload();byte PublicImageByte[] = mySmartUpload.getFiles( ).getFile( 0 ).getBytesOfImage( );将PublicImageByte存入数据库的BLOB类型字段里。注:这用到了SmartUpload jar包 struts2+freemaker+jq 连接数据库如何保存表单数据 关于在struts2中权限验证的问题 帮帮看看哪里数组索引越界了 J2EE有中文文档么,找了好久找不到 高分求助 地图调用问题 log4j 在Unix环境下的问题,高难度,高手请指教!?????? Struts自定义标签库的文档!!!!!@@@@@ 问一个简单的struts form问题,盼回答 玩过jboss的请过来,这个错误怎么回事?在线 ssh问题Servlet action is not available 会quartz的进,关于Job
import java.io.PrintWriter;import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;import org.apache.commons.fileupload.*;
import java.util.*;
import java.util.regex.*;
import java.io.*;
import org.apache.commons.fileupload.servlet.*;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;public class FileUpload extends HttpServlet {
private String uploadPath = "";
@Override
public void init(ServletConfig config) throws ServletException {
uploadPath = config.getInitParameter("uploadPath");
}
public void doPost(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException {
res.setContentType("text/html; charset=GB2312");
PrintWriter out = res.getWriter();
System.out.println("req.getContentLength() = " + req.getContentLength());
System.out.println("req.getContentType() = " + req.getContentType());
DiskFileItemFactory factory = new DiskFileItemFactory();
// maximum size that will be stored in memory
factory.setSizeThreshold(4096);
// the location for saving data that is larger than getSizeThreshold()
factory.setRepository(new File("d:\\temp")); ServletFileUpload upload = new ServletFileUpload(factory);
// maximum size before a FileUploadException will be thrown
upload.setSizeMax(1000000);
try {
List fileItems = upload.parseRequest(req);
Iterator iter = fileItems.iterator(); // 正则匹配,过滤路径取文件名
String regExp = ".+\\\\(.+)$"; // 过滤掉的文件类型
String[] errorType = { ".exe", ".com", ".cgi", ".asp" };
Pattern p = Pattern.compile(regExp);
while (iter.hasNext()) {
FileItem item = (FileItem) iter.next();
// 忽略其他不是文件域的所有表单信息
if (!item.isFormField()) {
String name = item.getName(); // name 文件的名字
long size = item.getSize(); // size 文件的大小
if ((name == null || name.equals("")) && size == 0)
continue;
Matcher m = p.matcher(name);
boolean result = m.find();
if (result) {
for (int temp = 0; temp < errorType.length; temp++) {
if (m.group(1).endsWith(errorType[temp])) {
throw new IOException(name + ": wrong type");
}
}
try {
// 保存上传的文件到指定的目录
// 在下文中上传文件至数据库时,将对这里改写
item.write(new File(uploadPath + m.group(1)));
out.print(name + " " + size + "<br>");
} catch (Exception e) {
out.println(e);
}
} else {
throw new IOException("fail to upload");
}
}
}
} catch (IOException e) {
out.println(e);
} catch (FileUploadException e) {
out.println(e);
} // 保存上传的文件到指定的目录 // 在下文中上传文件至数据库时,将对这里改写 }}注意两点:
1 web.xml 中配置
<servlet>
<servlet-name>FileUpload</servlet-name>
<servlet-class>com.zgm.servlet.FileUpload</servlet-class>
<init-param>
<param-name>uploadPath</param-name>
<param-value>D:\temp\image\</param-value>
</init-param>
</servlet>
2 导入org.apache.commons.fileupload包
<INPUT TYPE=FILE SIZE=60 NAME="FILE">上述中form表达一定要加enctype="multipart/form-data"这个属性后台java代码缩略是:在DocumentForm中定义私有成员
private FormFile contextFile;FormFile是struts的下载类import org.apache.struts.upload.FormFileDocumentForm df = (DocumentForm)form;
FormFile formFile = df.getContextFile(); byte[] bytes = formFile.getFileData();document.setContent(bytes);
后台处理程序如下:
SmartUpload mySmartUpload = new SmartUpload();
mySmartUpload.initialize(pageContext);
mySmartUpload.setTotalMaxFileSize(10485760);//设置最大10M
mySmartUpload.setAllowedFilesList("xls");
mySmartUpload.upload();
byte PublicImageByte[] = mySmartUpload.getFiles( ).getFile( 0 ).getBytesOfImage( );
将PublicImageByte存入数据库的BLOB类型字段里。
注:这用到了SmartUpload jar包