1.負責處理圖形的bean:
//---------------------------------------------------------------package bean;import javax.imageio.ImageIO;import javax.imageio.IIOException;import java.awt.image.BufferedImage;import java.awt.Image;import java.io.File;import java.awt.image.AffineTransformOp;import java.awt.geom.AffineTransform;
public class convertImage {
private String fileInput ; private String fileOutput ; public convertImage()
{
} public String getFileInput() { return fileInput; } public void setFileInput(String fileInput) { this.fileInput = fileInput; } public String getFileOutput() { return fileOutput; } public void setFileOutput(String fileOutput) { this.fileOutput = fileOutput; } public void convert() { try { File fi = new File(fileInput); //大圖文件 File fo = new File(fileOutput); //將要轉換出的小圖文件 int nw = 150; //定義寬爲150 int nh = 100; //定義高爲100 AffineTransform transform = new AffineTransform(); BufferedImage bis = ImageIO.read(fi); int w = bis.getWidth(); int h = bis.getHeight(); double sx = (double)nw/w; double sy = (double)nh/h ; //判斷是橫向圖形還是堅向圖形 if ( w > h ) //橫向圖形 { if ( (int)(sx * h ) > nh ) //比較高不符合高度要求,就按高度比例 { sx = sy ; nw = (int)(w*sx) ; } else { sy = sx ; nh = (int)( h*sy) ; } } else { if ( (int)(sy * w ) > nw ) { sy = sx ; nh = (int)(h * sy ) ; } else { sx = sy ; nw = (int)(w*sx) ; } } transform.setToScale(sx,sy); AffineTransformOp ato = new AffineTransformOp(transform,null); BufferedImage bid = new BufferedImage(nw,nh,BufferedImage.TYPE_3BYTE_BGR); ato.filter(bis,bid); ImageIO.write(bid,"jpeg",fo); } catch(Exception e) { e.printStackTrace(); } } 
}
2.上傳文件的upload.jsp
<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html" %><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> <head> <title>My JSP 'upload.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> </head> <body> <html:form action="/upload.do" enctype="multipart/form-data"> <html:file property="theFileone"/> <html:submit/> </html:form> </body></html>//------------------------------------------------------------------------
3.顯示成功頁面
//------------------------------------------------------------------------<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><%@ page contentType="text/html;charset=GB2312" %><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> <head> <base href="<%=basePath%>"> <title>My JSP 'display.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> </head> <body> 上傳成功. <br> </body></html>//---------------------------------------------------------------------
4.Action
//Created by MyEclipse Struts// XSL source (default): platform:/plugin/com.genuitec.eclipse.cross.easystruts.eclipse_4.1.1/xslt/JavaClass.xslpackage com.mk.struts.action;import java.io.*;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 com.mk.struts.form.UploadForm;import bean.convertImage;/** * MyEclipse Struts * Creation date: 03-28-2006 * * XDoclet definition: * @struts.action validate="true" */public class UploadAction extends Action { // --------------------------------------------------------- Instance Variables // --------------------------------------------------------- Methods /** * Method execute * @param mapping * @param form * @param request * @param response * @return ActionForward */ public ActionForward execute( ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) { // TODO Auto-generated method stub String encoding = request.getCharacterEncoding() ; if ( (encoding != null )&& (encoding.equalsIgnoreCase("uft-8"))) { response.setContentType("text/html;charset=gb2312") ; //如果沒有找定編碼，編碼格式設爲gb2312 } UploadForm theForm = (UploadForm) form ; FormFile fileone = theForm.getTheFileone() ; //取得上傳的文件名 try { //開始上傳文件 String filePath = this.getServlet().getServletContext().getRealPath("/") ; //取得當前路徑 InputStream stream = fileone.getInputStream() ; //把文件讀入 ByteArrayOutputStream baos = new ByteArrayOutputStream() ; /* * 建立一個上傳文件的輸出流如果是linux系統請把"/" 換成 "/" */ OutputStream bos = new FileOutputStream(filePath + fileone.getFileName()) ; request.setAttribute("fileName",filePath + "/" + fileone.getFileName() ) ; int bytesRead = 0 ; byte[] buffer = new byte[8192] ; while( (bytesRead = stream.read(buffer,0,8192) ) != -1 ) { bos.write(buffer,0,bytesRead) ; } bos.close(); stream.close() ; //上傳文件完成 String oldurl= filePath + fileone.getFileName() ; String newurl= filePath + "min_" + fileone.getFileName() ; //新的縮略圖保存地址 convertImage convert = new convertImage() ; convert.setFileInput(oldurl) ; convert.setFileOutput(newurl) ; convert.convert() ; } catch(Exception e) { System.err.print(e) ; } return mapping.findForward("display"); }}//---------------------------------------------------------------------------
//其它的看Myeclipse+struts源文件,源代碼下次傳上,