用JSP实现上传文件的两种方法
摘要：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
<%@ page contentType="text/html;charset=gb2312" %>
<head>
<title>fbysss UploadBean 示例</title>
<!--meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"-->
<!--meta 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:jameslastchina@hotmail.com
//==========================================================================
-->
<%@ 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>
<meta 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：java/uploadbean1_5.zip" target="_blank">http://wcarchive.cdrom.com/pub/simtelnet/winnt/java/uploadbean1_5.zip
FileMover1.3：javazoom.net/jzservlets/uploadbean/addons/filemover1.3.zip" target="_blank">http://www.javazoom.net/jzservlets/uploadbean/addons/filemover1.3.zip
参考下载地址：
ChinesUpload例子：javazoom.net/jzservlets/uploadbean/addons/ChineseUpload.zip" target="_blank">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
--------------------------------------------------------------------------------
<%@ 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>
--------------------------------------------------------------------------------
UpLoadAction.java
--------------------------------------------------------------------------------
import java.io.*;
import javax.servlet.http.*;
import org.apache.struts.action.*;
import org.apache.struts.upload.FormFile;
/**
* <p>Title:UpLoadAction</p>
* <p>Description: 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;
}
}
--------------------------------------------------------------------------------
UpLoadForm.java
--------------------------------------------------------------------------------
import javax.servlet.http.HttpServletRequest;
import org.apache.struts.action.*;
import org.apache.struts.upload.*;
/**
* <p>Title:UpLoadForm</p>
* <p>Description: 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 ActionErrors validate(ActionMapping mapping, HttpServletRequest request)
{
ActionErrors 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 ActionErrors();
errors.add(ERROR_PROPERTY_MAX_LENGTH_EXCEEDED, new ActionError("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
--------------------------------------------------------------------------------
<?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-->
Struts构建文件上传（7）
这是view页面viewtrainplan.JSP(上一张jsp名为planManage.jsp)
<%@ page contentType="text/html; charset=UTF-8" %>
<%@ taglib uri="/Web-INF/struts-bean.tld" prefix="bean" %>
<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html" %>
<%@ taglib uri="/WEB-INF/struts-logic.tld" prefix="logic" %>
<html>
<head>
<title>
veiwtrainplan
</title>
</head>
<%@ page import="tclcc.tester.business.maitain.Trainplan"%>
<body bgcolor="#ffffff">
<%
Trainplan trainP = (Trainplan)request.getAttribute("trainPlain");
%>
已经创建了计划
<%=trainP.getP_title()%>
<br>
<%=trainP.getP_Accessory()%>
</body>
</html>
最后看看struts-config页面的内容
<?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="examineeActionForm" type="tclcc.tester.business.ExamineeActionForm" />
<form-bean name="maintainForm" type="tclcc.tester.business.maitain.MaintainForm" />
<form-bean name="addPlanForm" type="tclcc.tester.business.maitain.AddPlanForm" />
</form-beans>
<global-forwards>
<forward name="veiwtrainplan" path="/veiwtrainplan.JSP" />
</global-forwards>
<action-mappings>
<action name="examineeActionForm" path="/admin/showMain" type="tclcc.tester.business.ShowMain">
<forward name="success" path="/admin/examinee/main.jsp" />
</action>
<action input="/admin/examinee/addExaminee.jsp" name="examineeActionForm" path="/admin/saveAddExaminee" type="tclcc.tester.business.SaveAddExamineeAction">
<forward name="success" path="/admin/showMain.do" />
</action>
<action name="examineeActionForm" path="/admin/addExaminee" type="tclcc.tester.business.AddExamineeAction">
<forward name="success" path="/admin/examinee/addExaminee.jsp" />
</action>
<action input="/admin/maintain/planManage.jsp" name="maintainForm" path="/maintainAction" scope="request" type="tclcc.tester.business.maitain.MaintainAction" validate="true">
<forward name="trainplanCreated" path="/veiwtrainplan.jsp" />
</action>
<action name="maintainForm" path="/initAction" scope="request" type="tclcc.tester.business.maitain.InitAction" validate="true">
<forward name="maintain" path="/admin/maintain/planManage.jsp" />
</action>
</action-mappings>
</struts-config>
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