helloaction.java

本光盘包含了本书各章中出现的所有程序的源代码。 1. 如果是Java程序

package action;

import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.upload.FormFile;

import form.HelloForm;

public class HelloAction extends Action {
	public ActionForward execute(ActionMapping mapping,
			ActionForm form,HttpServletRequest request,
			HttpServletResponse response)
	throws Exception
	{
		String dir = servlet.getServletContext().getRealPath("/file/");
		HelloForm helloForm = (HelloForm)form;
		FormFile file = helloForm.getFile();
		if( file == null )
		{
			return mapping.findForward("failure");
		}
		
		String fileName = file.getFileName();
		InputStream in = file.getInputStream();
		OutputStream out = new FileOutputStream(dir + "/" + fileName);
		
		int bytes = 0;
		byte[] buffer = new byte[2048];
		while(( bytes = in.read(buffer,0,2048))!=-1)
		{
			out.write(buffer,0,bytes);
		}
		return mapping.findForward("success");
	}
	
}