<%@ page language="java" contentType="text/html; charset=GB18030"
    pageEncoding="GB2312"%>
<%@ page import="org.apache.commons.fileupload.*"%>
<%@ page import="org.apache.commons.fileupload.servlet.*"%>
<%@ page import="org.apache.commons.fileupload.disk.*"%>
<%@ page import="java.util.*"%>
<%@ page import="java.io.*"%>
<%@ page import="picDeal.*" %>
<jsp:useBean id="pic" scope="page" class="picDeal.PicRgb">
</jsp:useBean>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GB18030">
<title>文件上传</title>
</head>
<body>
<center>上传中.....</center>
<%
String uploadPath=application.getRealPath("/upload");
	String picName=null;
	int width=0,height=0;
//目标文件夹的路径必须使用绝对路径，不能用相对路径
  boolean isMultipart = ServletFileUpload.isMultipartContent(request);
  if(isMultipart==true){
	  try{
	    FileItemFactory factory = new DiskFileItemFactory();
	    ServletFileUpload upload = new ServletFileUpload(factory);
	    List<FileItem> items = upload.parseRequest(request);//得到所有的文件
	   Iterator<FileItem> itr = items.iterator();
	    while(itr.hasNext()){//依次处理每个文件
		  FileItem item=(FileItem)itr.next();
		  String fileName=item.getName();//获得文件名，包括路径
		 	if(fileName!=null)
		 	{
			  File fullFile=new File(item.getName());
			  picName=fullFile.getName();
			  File savedFile=new File(uploadPath,fullFile.getName());
			  item.write(savedFile);
		 	}
	    }
	    out.println("upload succeed!");
	    out.println("上传的图片如下：");
	    	    //分析图片， 获取图片的信息
	    pic.setData(picName);
	    session.setAttribute("picture",pic);
	    %>
	    <form action="anaresult.jsp" method="post">
	    <table>
	    <tr>
	    <td>上传的图片如下：</td>
	    </tr>
	    <tr>
	    <td><img src=<%= "upload/"+picName %>></td>
	    </tr>
	    <tr>
	    <td><input type="submit" name="submit" value="提交分析"></td>
	    </tr>
	    </table>
	    </form>
	    <%
	  }
	  catch(Exception e){
		  e.printStackTrace();
		  out.print("failed!");
	  }
  }
  else{
	  out.println("the enctype must be multipart/form-data");
  }
%>
</body>
</html>

PicRgb

package picDeal;
import java.awt.*;
import java.awt.image.*;
import java.io.*;

import javax.imageio.*;

public class PicRgb {
	private int []rData;
	private int []gData;
	private int []bData;
	private int width;
	private int height;
	//分析图片，参数为图片的名字
	public PicRgb()
	{
		
	}
	public void setData(String name){
		Image image=null;
		try{
		File sourceimage = new File("upload/"+name);
		image=ImageIO.read(sourceimage);
		}
		catch(IOException e){
		}
		//读取图像的高度&宽度
		this.width=image.getWidth(null);
		this.height=image.getHeight(null);
		System.out.println(width);
		System.out.println(height);
		//读取图片像素信息
		Image im=Toolkit.getDefaultToolkit().getImage("upload/"+name);
		this.rData=new int[256];
		this.gData=new int[256];
		this.bData=new int[256];
		int []pixels=new int[width*height];
		try{
			PixelGrabber pg=new PixelGrabber(im,0,0,width,height,pixels,0,width);
			pg.grabPixels();
		}catch(InterruptedException e){
			e.printStackTrace();
		}
		ColorModel cm=ColorModel.getRGBdefault();
		int red,green,blue;
		for(int i=0;i<width*height;i++){
			red=cm.getRed(pixels[i]);
			this.rData[red]++;
			green=cm.getGreen(pixels[i]);
			this.gData[green]++;
			blue=cm.getBlue(pixels[i]);
	        this.bData[blue]++;
		}
	}
public void setRData(int[] r)
{
	this.rData=r;
}
public void setGData(int[] g)
{
	this.gData=g;
}
public void setBData(int[] b)
{
	this.bData=b;
}
public void setWidth(int w)
{
	this.width=w;
}
public void setHeight(int h)
{
	this.height=h;
}
	public int getWidth()
	{
		return this.width;
	}
	public int getHeight()
	{
		return this.height;
	}
	public int[] getRData()
	{
		return this.rData;
	}
	public int[] getGData()
	{
		return this.gData;
	}
	public int[] getBData()
	{
		return this.bData;
	}
}

当使用up_load.jsp页面时出现错误
提示 useBean使用的类不可用……弄了一下午，头都大了 - -

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