作者：wldandan　來源：www.matrix.org.cn 　發布時間：2006-02-22 17:55:09.217

最近剛做完一個項目，用Struts1.1做的。從不懂，到熟練使用，都靠參考CSDN的一些文檔。但是文章上講的并不一定適合自己，所以我把我自己做的一些東西拿上來給大家看看，互相交流一下。如果您有跟好的方法，可以和我聯系。
MSN:whw_dream (AT) hotmail.com

Struts的文件上傳
本文用的是Struts1.1的org.apache.struts.upload.FormFile類。很方便，不用自己寫。也不用寫一個jsp調用jspsmartupload就可以搞定。

選擇上傳文件頁面：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>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");//如果沒有指定編碼，編碼格式為gb2312
????????}
????????UpLoadForm theForm = (UpLoadForm ) form;
????????FormFile file = theForm.getTheFile();//取得上傳的文件
????????try {
??????????InputStream stream = file.getInputStream();//把文件讀入
??????????String filePath = request.getRealPath("/");//取當前系統路徑
??????????//?filePath =?request.getRealPath(request.getRequestURI()); //取當前系統路徑
??????????ByteArrayOutputStream baos = new ByteArrayOutputStream();
??????????OutputStream bos = new FileOutputStream(filePath + "/" +
??????????????????????????????????????????????????file.getFileName());//建立一個上傳文件的輸出流
??????????//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);//將文件寫入服務器
??????????}
??????????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>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;

??}
}
//這是相對應的form，還有其他屬性可以設置，具體可以參考struts的上傳例子。




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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就是隨便寫一個成功頁-->