单文件上传

上传的表单method应设为post,enctype应设为multipart/form-data


--------------------------示例---------------------------------------
upload.jsp
=====================
<form action="upload.do?method=upload" method="post"
		enctype="multipart/form-data">
		select the file you wish to upload:
		<input type="file" name="file" />
		<br />
		<input type="text" name="name"/>
		<input type="submit" value="submit" />
		<input type="reset" value="cancel" />
	</form>
	<%
			if (request.getAttribute("result") != null) {
			out.println(request.getAttribute("result").toString());
		}
	%>


UploadForm.java
=====================
/*
 * Generated by MyEclipse Struts
 * Template path: templates/java/JavaClass.vtl
 */
package com.supersit.struts.form;

import javax.servlet.http.HttpServletRequest;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.upload.FormFile;

/** 
 * MyEclipse Struts
 * Creation date: 10-23-2007
 * 
 * XDoclet definition:
 * @struts.form name="uploadForm"
 */
public class UploadForm extends ActionForm {
	/*
	 * Generated Methods
	 */

	/** 
	 * Method validate
	 * @param mapping
	 * @param request
	 * @return ActionErrors
	 */
	public ActionErrors validate(ActionMapping mapping,
			HttpServletRequest request) {
		// TODO Auto-generated method stub
		return null;
	}

	/** 
	 * Method reset
	 * @param mapping
	 * @param request
	 */
	public void reset(ActionMapping mapping, HttpServletRequest request) {
		// TODO Auto-generated method stub
	}
	
	private FormFile file;
	
	private String name;
	

	public FormFile getFile() {
		return file;
	}

	public void setFile(FormFile file) {
		this.file = file;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}
	
}


UploadAction.java
==========================
/*
 * Generated by MyEclipse Struts
 * Template path: templates/java/JavaClass.vtl
 */
package com.supersit.struts.action;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.actions.DispatchAction;

import com.supersit.struts.form.UploadForm;
import com.supersit.struts.util.DateTime;
import com.supersit.struts.util.MD5;

/**
 * MyEclipse Struts Creation date: 10-23-2007
 * 
 * XDoclet definition:
 * 
 * @struts.action input="/upload.jsp"
 */
public class UploadAction extends DispatchAction {
	/*
	 * Generated Methods
	 */

	/**
	 * Method execute
	 * 
	 * @param mapping
	 * @param form
	 * @param request
	 * @param response
	 * @return ActionForward
	 */
	public ActionForward upload(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {

		UploadForm uploadform = (UploadForm) form;

		String context = this.servlet.getServletContext().getRealPath("/");
		
		System.out.println("context="+context);

		org.apache.struts.upload.FormFile formfile = uploadform.getFile();
		java.io.InputStream is = null;
		java.io.OutputStream os = null;
		try {
			is = formfile.getInputStream();

			String ext=formfile.getFileName().split("\\.")[1];
			String filename = new MD5().getMD5ofStr(formfile.getFileName()
					+ new DateTime().getCurrentDate5())
					+ "." + ext;

			System.out.println("filename===" + filename);

			os = new FileOutputStream(context + "/photo/" + filename);

			byte[] bytes = new byte[8192];
			while ((is.read(bytes, 0, 8192)) != -1) {
				os.write(bytes, 0, 8192);
			}

			if (os != null)
				os.close();
			if (is != null)
				is.close();
			
			request.setAttribute("result", "上传成功");
			
			
			
			String name=uploadform.getName();
			
			name=new String(name.getBytes("ISO8859-1"),"utf-8");
			
			System.out.println("name==="+name);
			
		} catch (FileNotFoundException e) {
			e.printStackTrace();
			request.setAttribute("result", "上传失败");
		} catch (IOException e) {
			e.printStackTrace();
			request.setAttribute("result", "上传失败");
		}

		return mapping.findForward("upload");
	}
}



struts-config.xml
=================
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN" "http://struts.apache.org/dtds/struts-config_1_2.dtd">

<struts-config>
  <data-sources />
  <form-beans >
    <form-bean name="uploadForm" type="com.supersit.struts.form.UploadForm" />

  </form-beans>

  <global-exceptions />
  <global-forwards />
  <action-mappings >
    <action
      name="uploadForm"
      attribute="uploadForm"
      input="/upload.jsp"
      path="/upload"
      type="com.supersit.struts.action.UploadAction"
      validate="false" 
      parameter="method">
      <forward name="upload" path="/upload.jsp"></forward>
            </action>

  </action-mappings>

  <message-resources parameter="com.supersit.struts.ApplicationResources" />
</struts-config>