【网红ipo源码】【寻妖能量柱指标公式源码】【控制台exe怎么查看源码】jsp文件上传源码_jsp文件上传源码是什么
1.JSP ä¸ä¼ ä¸è½½ä»£ç
2.jspç®åä¸ä¼ 代ç
3.我刚刚学jsp，文文件请问为什么FileUpload显示不出“上传的传源网红ipo源码文件为：”和“保存的地址为：”下面是FileUpload的代
JSP ä¸ä¼ ä¸è½½ä»£ç
æç»ä½ æï¼
1.é¦å ä¸è¿ä¸¤ä¸ªå commons-fileupload-1.2.1.jarï¼commons-io-1.3.2.jar
2.ç¼ååå°é¡µé¢
<%@ page language="java" pageEncoding="gbk"%>
<%@ taglib uri="/struts-tags" prefix="s" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4. Transitional//EN">
<html>
<body>
<form action="<%=request.getContextPath()%>/UploadServlet" method="post" enctype="multipart/form-data">
username:<input type="text" name="username"><br>
password:<input type="password" name="password"><br>
file:<input type="file" name="file"><br>
<input type="submit" value="submit"><br>
</form>
</body>
</html>
3.ç¼åservlet
package cn.jci.upload.servlet;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet..jci.upload.servlet.UploadServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>UploadServlet</servlet-name>
<url-pattern>/UploadServlet</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
5.åå¸
okäº
è¿æ¯æåå§çä¸ä¼ æ件çåæ³ï¼ç°å¨struts2ä¸ä¼ çè¯ï¼å°±è¦è½»æ¾å¥½å¤
jspç®åä¸ä¼ 代ç
servletæ件ä¸ä¼
login.jsp
<%@ page language="java" contentType="text/html; charset=gbk"
pageEncoding="gbk"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4. Transitional//EN" ".test.servlet;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.mons.fileupload.FileItem;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
public class UploadServlet extends HttpServlet {
public UploadServlet() {
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String path = request.getSession().getServletContext().getRealPath("/upload");
DiskFileItemFactory factory = new DiskFileItemFactory();
factory.setRepository(new File(path));
factory.setSizeThreshold( * );
ServletFileUpload upload = new ServletFileUpload(factory);
try
{
List<FileItem>list = upload.parseRequest(request);
for(FileItem item:list){
if(item.isFormField()){
String name = item.getFieldName();
String value = item.getString("utf-8");
request.setAttribute(name, value);
}
else{
String name = item.getFieldName();
String value = item.getName();
int start = value.lastIndexOf("\\");
String fileName = value.substring(start+1);
request.setAttribute(name, fileName);
System.out.println(fileName);
OutputStream os = new FileOutputStream(new File(path,fileName));
InputStream is = item.getInputStream();
byte[] buffer = new byte[];
int length = 0;
while((length = is.read(buffer))>0){
os.write(buffer,0,length);
}
os.close();
is.close();
}
}
}
catch(Exception e){
e.printStackTrace();
}
request.getRequestDispatcher("/result.jsp").forward(request, response);
}
}
Strutsæ件ä¸ä¼
1.å建ä¸ä¸ªå·¥ç¨ï¼
å建ä¸ä¸ªJSP页é¢å 容å¦ä¸ï¼
<body>
<form action="uploadAction.do" method="post" enctype="multipart/form-data" >
<input type="file" name="file">
<input type="submit">
</form>
</body>
2.å建ä¸ä¸ªFormBean继æ¿ActionForm
å ¶ä¸æ个private FormFile file ;å±æ§ãFormFileç±»çå ¨å为ï¼org.apache.struts.upload.FormFile
3.å建ä¸ä¸ªUploadAction继æ¿èªAction
ç¶åéåActionçexecute()æ¹æ³ï¼
代ç å¦ä¸ï¼
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) {
UploadForm uploadForm = (UploadForm) form;
if(uploadForm.getFile()!=null)
FileUtil.uploadFile(uploadForm.getFile(), "e:/abc/accp");
return null;
}
4.å建FileUtilå·¥å ·ç±»ï¼éé¢å®ç°ä¸ä¼ çæ件çæ¹æ³ï¼
å ³é®ä»£ç å¦ä¸ï¼
public class FileUtil
{
/*** å建空ç½æ件
* @param fileName æ件å
* @param dir ä¿åæ件çç®å½
* @return
*/
private static File createNewFile(String fileName,String dir)
{
File dirs = new File(dir);
//çæ件夹æ¯å¦åå¨ï¼å¦æä¸åå¨æ°å»ºç®å½
if(!dirs.exists())
dirs.mkdirs();
//æ¼åæ件å®æè·¯å¾
File file = new File(dir+File.separator+fileName);
try {
//å¤ææ¯å¦æååååï¼å¦ææååæ件å éæºæ°æ¹åæ件å
while(file.exists()){
int ran = getRandomNumber();
String prefix = getFileNamePrefix( fileName);
String suffix = getFileNameSuffix( fileName);
String name = prefix+ran+"."+suffix;
file = new File(dir+File.separator+name);
}
file.createNewFile();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return file;
}
/
*** è·å¾éæºæ°
* @return
*/
private static int getRandomNumber() {
Random random = new Random(new Date().getTime());
return Math.abs(random.nextInt());
}
/
*** åå²æ件å å¦a.txt è¿å a
* @param fileName
* @return
*/
private static String getFileNamePrefix(String fileName){
int dot = fileName.lastIndexOf(".");
return fileName.substring(0,dot);
}
/
*** è·å¾æ件åç¼
* @param fileName
* @return
*/
private static String getFileNameSuffix(String fileName) {
int dot = fileName.lastIndexOf(".");
return fileName.substring(dot+1);
}
/
*** ä¸ä¼ æ件
* @param file
* @param dir
* @return
*/
public static String uploadFile(FormFile file,String dir)
{
//è·å¾æ件å
String fileName = file.getFileName();
InputStream in = null;
OutputStream out = null;
try
{
in = new BufferedInputStream(file.getInputStream());//æé è¾å ¥æµ
File f = createNewFile(fileName,dir);
out = new BufferedOutputStream(new FileOutputStream(f));//æé æ件è¾åºæµ
byte[] buffered = new byte[];//è¯»å ¥ç¼å
int size =0;//ä¸æ¬¡è¯»å°ççå®å¤§å°
while((size=in.read(buffered,0,))!=-1)
{
out.write(buffered,0,size);
}
out.flush();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
finally
{
try {
if(in != null) in.close();
} catch (IOException e) {
e.printStackTrace();
}
try {
if(out != null) out.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
return null;
}
}
我刚刚学jsp，请问为什么FileUpload显示不出“上传的上传寻妖能量柱指标公式源码文件为：”和“保存的地址为：”下面是FileUpload的代
jsp上传下载原理是服务器通过http请求获得文件的数据流，然后分析数据流，源码控制台exe怎么查看源码提取出文件的文文件css3实战汇总附源码控制信息，最后得到与原文件一样的传源燕窝什么时候有溯源码数据文件并存储。
但这样，上传工作量很大。源码
可以采用jspSmartUpload包。文文件
传源一个例子：
传源<!DCTYPE HTML PUBLIC "-//W3C//DTD HTML 4. Transitional//EN">
传源<html>
传源<head>
传源<title>文件上传</title>
传源<meta http-equiv="content-type" content="text/html; charset=gb" >
传源<script language="javascript">
传源function sub(){
传源document.myform.submit();
传源}
传源</script>
传源</head>
传源<body>
传源<p> </p>
传源<p align="center">上传信息输入</p>
传源<form name="myform" method="post" action="do_upload.jsp" enctype="multipart/form-data">
传源<table width="%" border="1" align="center">
传源<tr>
传源<td><div align="left"> 上传源文件：
传源<input type="file" name="file2" size="">
传源</div></td>
传源</tr>
传源<tr>
传源<td>上传后文件名:
传源<input type="text" name="title" size="" ></td>
传源</tr>
传源<tr>
传源<td colspan="2"> <div align="center">
传源<input type="button" name="submit" value="提交" onClick="sub()" >
传源</div></td>
传源</tr>
传源</table>
传源</form>
传源</body>
传源</html>
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