商业源码 jsp+servlet 怎么实现文件上传
你要做文件上传吧 form表单里一定要设置这两个值enctype="multipart/form-data" method="post"
上传成功后会在tomcat里有那个文件 ，至于你说的要获取io流。那就需要找到那个文件给你写一下伪码吧:
//获得上传文件的路径
String path = getServletContext()getRealPath(webpath);
File file = new File(path);
filegetParentFile()mkdirs();
filecreateNewFile();
// 获得流
InputStream in = itemgetInputStream();
OutputStream out = new FileOutputStream(file);
不懂的再问我!
建议你用个上传组件，fileupload什么的
2、增加属性：ENCTYPE="multipart/form-data" 下面是一个用于上传文件的FORM表单的例子： <FORM METHOD="POST" ENCTYPE="multipart/form-data" ACTION="/jspSmartUpload/uploadjsp"> <INPUT TYPE="FILE" NAME="MYFILE"> <INPUT TYPE="SUBMIT"> </FORM>二 上传的例子 1、上传页面uploadhtml 本页面提供表单，让用户选择要上传的文件，点击"上传"按钮执行上传操作。 页面源码如下： <!-- 文件名：uploadhtml 作 者：纵横软件制作中心雨亦奇(zhsoft88@sohucom) --> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 401 Transitional//EN"> <html> <head> <title>文件上传</title> <meta http-equiv="Content-Type" content="text/html; charset=gb2312"> </head> <body> <p></p> <p align="center">上传文件选择</p> <FORM METHOD="POST" ACTION="jsp/do_uploadjsp" ENCTYPE="multipart/form-data"> <input type="hidden" name="TEST" value="good"> <table width="75%" border="1" align="center"> <tr> <td><div align="center">1、 <input type="FILE" name="FILE1" size="30"> </div></td> </tr> <tr> <td><div align="center">2、 <input type="FILE" name="FILE2" size="30"> </div></td> </tr> <tr> <td><div align="center">3、 <input type="FILE" name="FILE3" size="30"> </div></td> </tr> <tr> <td><div align="center">4、 <input type="FILE" name="FILE4" size="30"> </div></td> </tr> <tr> <td><div align="center"> <input type="submit" name="Submit" value="上传它！"> </div></td> </tr> </table> </FORM> </body> </html>2、上传处理页面do_uploadjsp 本页面执行文件上传操作。页面源码中详细介绍了上传方法的用法，在此不赘述了。 for (int i=0;i<sugetFiles()getCount();i++) { comjspsmartuploadFile file = sugetFiles()getFile(i); // 若文件不存在则继续 if (fileisMissing()) continue; // 显示当前文件信息 outprintln("<TABLE BORDER=1>"); outprintln("<TR><TD>表单项名（FieldName）</TD><TD>" + filegetFieldName() + "</TD></TR>"); outprintln("<TR><TD>文件长度（Size）</TD><TD>" + filegetSize() + "</TD></TR>"); outprintln("<TR><TD>文件名（FileName）</TD><TD>" + filegetFileName() + "</TD></TR>"); outprintln("<TR><TD>文件扩展名（FileExt）</TD><TD>" + filegetFileExt() + "</TD></TR>"); outprintln("<TR><TD>文件全名（FilePathName）</TD><TD>" + filegetFilePathName() + "</TD></TR>"); outprintln("</TABLE><BR>"); // 将文件另存 // filesaveAs("/upload/" + myFilegetFileName()); // 另存到以WEB应用程序的根目录为文件根目录的目录下 // filesaveAs("/upload/" + myFilegetFileName(), suSAVE_VIRTUAL); // 另存到操作系统的根目录为文件根目录的目录下 // filesaveAs("c:\\temp\\" + myFilegetFileName(), suSAVE_PHYSICAL); } %> </body> </html>(T007)
把要处理文件的程序封装成一个 类，然后把类放到 classes文件夹 里面以供 jsp页面调用 ，当然也可以写成servlet 在servlet里面调用 该处理文件的类，
还有不清楚的 加 QQ 540234292 详谈
public class MultipartTestServlet extends HttpServlet {
public MultipartTestServlet() { //构造方法
super();
}
public void doPost(HttpServletRequest request, HttpServletResponse response) //servlet的doPost方法处理POST请求
throws ServletException, IOException { //抛出异常
requestsetCharacterEncoding("gbk"); //设置字符为GBK
RequestContext requestContext = new ServletRequestContext(request); //实例化RequestContext对象
if(FileUploadisMultipartContent(requestContext)){
//判断是否包含 multipart 内容
DiskFileItemFactory factory = new DiskFileItemFactory();
// 创建基于磁盘的文件工厂
factorysetRepository(new File("c:/tmp/")); // 设置临时目录
ServletFileUpload upload = new ServletFileUpload(factory);
uploadsetHeaderEncoding("gbk");
uploadsetSizeMax(2000000); //设置缓冲区大小
List items = new ArrayList();
try {
items = uploadparseRequest(request); // 得到所有的文件
} catch (FileUploadException e1) {
Systemoutprintln("文件上传发生错误" + e1getMessage());
}
Iterator it = itemsiterator();
while(ithasNext()){
FileItem fileItem = (FileItem) itnext();
if(fileItemisFormField()){
Systemoutprintln(fileItemgetFieldName() + " " + fileItemgetName() + " " + new String(fileItemgetString()getBytes("iso8859-1"), "gbk")); //获得表单中域的名字。获得从浏览器中取得的文件全路径
}else{
Systemoutprintln(fileItemgetFieldName() + " " +
fileItemgetName() + " " +
fileItemisInMemory() + " " +
fileItemgetContentType() + " " +
fileItemgetSize());
if(fileItemgetName()!=null && fileItemgetSize()!=0){
// 浏览器中取得的文件全路径不为空 大小 不为0 则写入
File fullFile = new File(fileItemgetName());
File newFile = new File("c:/temp/" + fullFilegetName());
try {
fileItemwrite(newFile);
} catch (Exception e) {
eprintStackTrace();
}
}else{
Systemoutprintln("文件没有选择 或 文件内容为空");
}
}
}
}
}
}
上传：
需要导入两个包：commons-fileupload-121jar,commons-io-14jar
import javaioFile;
import javaioIOException;
import javautilList;
import javaxservletServletException;
import javaxservlethttpHttpServlet;
import javaxservlethttpHttpServletRequest;
import javaxservlethttpHttpServletResponse;
import orgapachecommonsfileuploadFileItem;
import orgapachecommonsfileuploaddiskDiskFileItemFactory;
import orgapachecommonsfileuploadservletServletFileUpload;
/
上传附件
@author new
/
public class UploadAnnexServlet extends HttpServlet {
private static String path = "";
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doPost(request, response);
}
/
post处理
(non-Javadoc)
@see javaxservlethttpHttpServlet#doPost(javaxservlethttpHttpServletRequest, javaxservlethttpHttpServletResponse)
/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
path = thisgetServletContext()getRealPath("/upload");
try {
DiskFileItemFactory factory = new DiskFileItemFactory();
ServletFileUpload up = new ServletFileUpload(factory);
List<FileItem> ls = upparseRequest(request);
for (FileItem fileItem : ls) {
if (fileItemisFormField()) {
String FieldName = fileItemgetFieldName();
//getName()返回的是文件名字 普通域没有文件 返回NULL
// String Name = fileItemgetName();
String Content = fileItemgetString("gbk");
requestsetAttribute(FieldName, Content);
} else {
String nm = fileItemgetName()substring(
fileItemgetName()lastIndexOf("\\") + 1);
File mkr = new File(path, nm);
if (mkrcreateNewFile()) {
fileItemwrite(mkr);//非常方便的方法
}
requestsetAttribute("result", "上传文件成功！");
}
}
} catch (Exception e) {
eprintStackTrace();
requestsetAttribute("result", "上传失败，请查找原因，重新再试！");
}
requestgetRequestDispatcher("/pages/admin/annex-managerjsp")forward(
request, response);
}
}
下载（i/o流）无需导包：
import javaioIOException;
import javanetURLEncoder;
import javaxservletServletException;
import javaxservlethttpHttpServlet;
import javaxservlethttpHttpServletRequest;
import javaxservlethttpHttpServletResponse;
/
下载文件
@author
/
public class DownloadFilesServlet extends HttpServlet {
/
/
private static final long serialVersionUID = 8594448765428224944L;
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doPost(request, response);
}
/
处理请求
(non-Javadoc)
@see javaxservlethttpHttpServlet#doPost(javaxservlethttpHttpServletRequest, javaxservlethttpHttpServletResponse)
/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String name = requestgetParameter("fileName");
Systemoutprint("dddddddddd:" + name);
// web绝对路径
String path = requestgetSession()getServletContext()getRealPath("/");
String savePath = path + "upload";
// 设置为下载application/x-download
responsesetContentType("application/x-download");
// 即将下载的文件在服务器上的绝对路径
String filenamedownload = savePath + "/" + name;
// 下载文件时显示的文件保存名称
String filenamedisplay = name;
// 中文编码转换
filenamedisplay = URLEncoderencode(filenamedisplay, "UTF-8");
responseaddHeader("Content-Disposition", "attachment;filename="
+ filenamedisplay);
try {
javaioOutputStream os = responsegetOutputStream();
javaioFileInputStream fis = new javaioFileInputStream(
filenamedownload);
byte[] b = new byte[1024];
int i = 0;
while ((i = fisread(b)) > 0) {
oswrite(b, 0, i);
}
fisclose();
osflush();
osclose();
} catch (Exception e) {
}
}
}
你下载一个jspsmart组件，网上很容易下到，用法如下，这是我程序的相关片断，供你参考： <%@ page import="comjspsmartupload" %>
<jsp:useBean id="mySmartUpload" scope="page" class="comjspsmartuploadSmartUpload" />
<%
String photoname="photoname";
// Variables
int count=0; // Initialization
mySmartUploadinitialize(pageContext); // Upload
mySmartUploadupload();
for (int i=0;i<mySmartUploadgetFiles()getCount();i++){ // Retreive the current file
comjspsmartuploadFile myFile = mySmartUploadgetFiles()getFile(i); // Save it only if this file exists
if (!myFileisMissing()) {
javautilDate thedate=new javautilDate();
javatextDateFormat df = new javatextSimpleDateFormat("yyyy-MM-dd-HH-mm-ss");
photoname = dfformat(thedate);
photoname +=""+ myFilegetFileExt();
myFilesaveAs("/docs/docimg/" + photoname);
count ++; } }
%>
<% String title="1";
String author="1";
String content="1";
String pdatetime="1";
String topic="1";
String imgintro="1";
String clkcount="1"; if(mySmartUploadgetRequest()getParameter("title")!=null){
title=(String)mySmartUploadgetRequest()getParameter("title");
title=new String(titlegetBytes("gbk"),"ISO-8859-1");
}
if(mySmartUploadgetRequest()getParameter("author")!=null){
author=(String)mySmartUploadgetRequest()getParameter("author");
author=new String(authorgetBytes("gbk"),"ISO-8859-1");
}
if(mySmartUploadgetRequest()getParameter("content")!=null){
content=(String)mySmartUploadgetRequest()getParameter("content");
content=new String(contentgetBytes("gbk"),"ISO-8859-1");
}
if(mySmartUploadgetRequest()getParameter("pdatetime")!=null){
pdatetime=(String)mySmartUploadgetRequest()getParameter("pdatetime");
}
if(mySmartUploadgetRequest()getParameter("topic")!=null){
topic=(String)mySmartUploadgetRequest()getParameter("topic");
}
if(mySmartUploadgetRequest()getParameter("imgintro")!=null){
imgintro=(String)mySmartUploadgetRequest()getParameter("imgintro");
imgintro=new String(imgintrogetBytes("gbk"),"ISO-8859-1");
}
if(mySmartUploadgetRequest()getParameter("clkcount")!=null){
clkcount=(String)mySmartUploadgetRequest()getParameter("clkcount");
}
//outprintln(code+name+birthday);
%>
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