JspServlet-用JSP实现上传文件的两种方法
在用Java开发企业器系统的使用,特别是涉及到与办公相关的软件开发的时候,文件的上传是客户经常要提到的要求.因此有 一套很好文件上传的解决办法也能方便大家在这一块的开发.
首先申明,该文章是为了自己记录一备以后开发需要的时候,不用手忙脚乱哈哈........
现在在国内用的非常多的一般是两种方法解决来解决文件上传.
cos.jar + uploadbean.jar + filemover.jar
这个是用的非常普遍的,原因是因为他操作方便,是我们不必再去关注,那些文件的输入和输出流,使我们从底层的流中解脱出来.
UploadFile,UploadBean,MultipartFormDataRequest
2.读取表单页面sssgetdata.jsp
Demo注意事项：cos.jar，uploadbean.jar，filemover.jar这几个包必须有。
必备下载地址：
UploadBean1.5：http://wcarchive.cdrom.com/pub/simtelnet/winnt/java/uploadbean1_5.zip
FileMover1.3：http://www.javazoom.net/jzservlets/uploadbean/addons/filemover1.3.zip
参考下载地址：
ChinesUpload例子：http://www.javazoom.net/jzservlets/uploadbean/addons/ChineseUpload.zip
参考了fbysss的一篇文章
2. org.apache.struts.upload.FormFile
Struts1.1的org.apache.struts.upload.FormFile类。很方便，不用自己写。也不用写一个jsp调用jspsmartupload就可以搞定。
选择上传文件页面：selfile.jsp
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UpLoadAction.java
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UpLoadForm.java
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//这是相对应的form，还有其他属性可以设置，具体可以参考struts的上传例子。
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struts-config.xml
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首先申明,该文章是为了自己记录一备以后开发需要的时候,不用手忙脚乱哈哈........
现在在国内用的非常多的一般是两种方法解决来解决文件上传.
cos.jar + uploadbean.jar + filemover.jar
这个是用的非常普遍的,原因是因为他操作方便,是我们不必再去关注,那些文件的输入和输出流,使我们从底层的流中解脱出来.
UploadFile,UploadBean,MultipartFormDataRequest
<%@ page contentType="text/html;charset=gb2312" %> <head> <title>fbysss UploadBean 示例</title> <!-- http-equiv="Content-Type" content="text/html; charset=iso-8859-1"--> <!-- http-equiv="Content-Type" content="text/html; charset=gb2312"--> </head> <FORM name="form1" METHOD="POST" ACTION="sssupload.jsp" ENCTYPE="multipart/form-data"> <input name="title" type= "text" value="中文字"> <td class="bodystyle">附件</td> <td class="bodystyle"> <input name="attach" type="FILE" id="attach" size="50" > </td> <input name="ok" type= "submit" value="提交"> </form>
2.读取表单页面sssgetdata.jsp
<!-- //========================================================================== //文件：UploadBean上传实例 //功能：解决中文乱码，完成文件上传，并提供上传改名解决方案 //作者：fbysss //msn:[email protected] //========================================================================== --> <%@ page contentType="text/html;charset=GBK" %> <%@ page language="java" import="com.jspsmart.upload.*"%> <%@ page import="java.text.SimpleDateFormat"%> <%@ page import="java.io.File"%> <%@ page import="java.util.*"%> <%@ page import="javazoom.upload.*"%> <%@ page import="uploadutilities.FileMover"%> <head> < http-equiv="Content-Type" content="text/html; charset=gb2312"> </head> <% request.setCharacterEncoding("GBK");//设置编码格式，就不用一个个转码了。 FileMover fileMover = new FileMover();//你也可以使用自带的实例中jsp:useBean的形式。 UploadBean upBean = new UploadBean(); MultipartFormDataRequest mrequest = null; Hashtable files = null; if (MultipartFormDataRequest.isMultipartFormData(request)) { mrequest = new MultipartFormDataRequest(request,null,100*1024*1024,MultipartFormDataRequest.COSPARSER,"GBK");//注意这里也要设置编码参数 String sTt0 = mrequest.getParameter("title"); out.println("<br>Title0是："+sTt0+"<br>"); String sTt1 = new String(sTt0.getBytes("ISO-8859-1"),"GBK"); out.println("<br>Title1是："+sTt1+"<br>"); //这里用来测试title参数是否正确。调试的时候，加一句if (true)return;即可。 files = mrequest.getFiles(); } //获取修改前的文件名 String sOldFileName =mrequest.getParameter("oldfilename"); out.println("sOldFileName:"+sOldFileName); String sWebRootPath = request.getRealPath("/");//得到你的web应用的根。 String sPath=sWebRootPath+"attach"; int iFileCount = 0; String sServerFileName=""; String sLocalFileName = ""; //文件获取 if ( (files != null) || (!files.isEmpty()) ) { iFileCount = files.size(); UploadFile file = (UploadFile) files.get("attach"); sLocalFileName=file.getFileName(); out.println("sLocalFileName:"+sLocalFileName); int ii= sLocalFileName.indexOf("."); //取文件名的后缀 String sExt = sLocalFileName.substring(ii,sLocalFileName.length()); //得到不重复的文件名 java.util.Date dt = new java.util.Date(System.currentTimeMillis()); SimpleDateFormat fmt = new SimpleDateFormat("yyyyMMddHHmmssSSS"); sServerFileName= fmt.format(dt); sServerFileName =sServerFileName + sExt; //如果不存在该目录，则新建一个 File dir =new File(sPath); if (!dir.exists()){ dir.mkdirs(); } upBean.setFolderstore(sPath);//设置要上传的目录 upBean.addUploadListener(fileMover);//增加filMover监听 fileMover.setNewfilename(sServerFileName);//设置服务器上的文件名 upBean.store(mrequest, "attach");//上传 out.println("file path is "+sPath+"/"+sServerFileName); } %>
Demo注意事项：cos.jar，uploadbean.jar，filemover.jar这几个包必须有。
必备下载地址：
UploadBean1.5：http://wcarchive.cdrom.com/pub/simtelnet/winnt/java/uploadbean1_5.zip
FileMover1.3：http://www.javazoom.net/jzservlets/uploadbean/addons/filemover1.3.zip
参考下载地址：
ChinesUpload例子：http://www.javazoom.net/jzservlets/uploadbean/addons/ChineseUpload.zip
参考了fbysss的一篇文章
2. org.apache.struts.upload.FormFile
Struts1.1的org.apache.struts.upload.FormFile类。很方便，不用自己写。也不用写一个jsp调用jspsmartupload就可以搞定。
选择上传文件页面：selfile.jsp
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<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html"%> <html:html> <html:form action="/uploadsAction.do" enctype="multipart/form-data"> <html:file property="theFile"/> <html:submit/> </html:form> </html:html>
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UpLoadAction.java
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import java.io.*;
import javax.servlet.http.*;
import org.apache.struts.action.*;
import org.apache.struts.upload.FormFile;
/**
* <p>Title:UpLoadAction</p>
* <p>Deion: QRRSMMS </p>
* <p>Copyright: Copyright (c) 2004 jiahansoft</p>
* <p>Company: jiahansoft</p>
* @author wanghw
* @version 1.0
*/
public class UpLoadAction extends Action {
public ActionForward execute(ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response)
throws Exception {
if (form instanceof uploadsForm) {//如果form是uploadsForm
String encoding = request.getCharacterEncoding();
if ((encoding != null) && (encoding.equalsIgnoreCase("utf-8")))
{
response.setContentType("text/html; charset=gb2312");//如果没有指定编码，编码格式为gb2312
}
UpLoadForm theForm = (UpLoadForm ) form;
FormFile file = theForm.getTheFile();//取得上传的文件
try {
InputStream stream = file.getInputStream();//把文件读入
String filePath = request.getRealPath("/");//取当前系统路径
ByteArrayOutputStream baos = new ByteArrayOutputStream();
OutputStream bos = new FileOutputStream(filePath + "/" +
file.getFileName());//建立一个上传文件的输出流
//System.out.println(filePath+"/"+file.getFileName());
int bytesRead = 0;
byte[] buffer = new byte[8192];
while ( (bytesRead = stream.read(buffer, 0, 8192)) != -1) {
bos.write(buffer, 0, bytesRead);//将文件写入服务器
}
bos.close();
stream.close();
}catch(Exception e){
System.err.print(e);
}
//request.setAttribute("dat",file.getFileName());
return mapping.findForward("display");
}
return null;
}
}
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UpLoadForm.java
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import javax.servlet.http.HttpServletRequest;
import org.apache.struts.action.*;
import org.apache.struts.upload.*;
/**
* <p>Title:UpLoadForm</p>
* <p>Deion: QRRSMMS </p>
* <p>Copyright: Copyright (c) 2004 jiahansoft</p>
* <p>Company: jiahansoft</p>
* @author wanghw
* @version 1.0
*/
public class UpLoadForm extends ActionForm {
public static final String ERROR_PROPERTY_MAX_LENGTH_EXCEEDED = "org.apache.struts.webapp.upload.MaxLengthExceeded";
protected FormFile theFile;
public FormFile getTheFile() {
return theFile;
}
public void setTheFile(FormFile theFile) {
this.theFile = theFile;
}
public Actis validate(ActionMapping mapping, HttpServletRequest request)
{
Actis errors = null;
//has the maximum length been exceeded?
Boolean maxLengthExceeded = (Boolean)
request.getAttribute(MultipartRequestHandler.ATTRIBUTE_MAX_LENGTH_EXCEEDED);
if ((maxLengthExceeded != null) && (maxLengthExceeded.booleanValue()))
{
errors = new Actis();
errors.add(ERROR_PROPERTY_MAX_LENGTH_EXCEEDED, new Acti("maxLengthExceeded"));
}
return errors;
}
}
//这是相对应的form，还有其他属性可以设置，具体可以参考struts的上传例子。
--------------------------------------------------------------------------------
struts-config.xml
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<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.1//EN" "http://jakarta.apache.org/struts/dtds/struts-config_1_1.dtd"> <struts-config> <form-beans> <form-bean name="uploadsForm" type="UpLoadForm" /> </form-beans> <action-mappings> <action name="uploadsForm" type="UpLoadAction" path="/uploadsAction"> <forward name="display" path="/display.jsp" /> </action> </action-mappings> </struts-config> <!--display.jsp就是随便写一个成功页-->