作者：未知 来源：月光软件站 加入时间：2005-2-28　月光软件站

最近刚做完一个项目，用Struts1.1做的。从不懂，到熟练使用，都靠参考CSDN的一些文档。但是文章上讲的并不一定适合自己，所以我把我自己做的一些东西拿上来给大家看看，互相交流一下。如果您有跟好的方法，可以和我联系。
MSN:whw_dream (AT) hotmail.com

Struts的文件上传
本文用的是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

/**
 * <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;
  }
}

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。

相关软件：