|
package zengxiaomeng; import java.io.*; import java.util.*; import javax.servlet.*; import javax.servlet.http.*; import javax.swing.ImageIcon; import com.jspsmart.upload.*; import java.awt.Color; import java.awt.Graphics2D; import java.awt.Image; import java.awt.image.*; import com.sun.image.codec.jpeg.*; public class UploadServlet extends HttpServlet { private static final long serialVersionUID = 1L; private final static long FILE_MAX_SIZE=4000000;//設(shè)置允許上傳文件的大小限制 private final static String FILE_EXTEND_NAME="jpg,JPG,gif,GIF,png,PNG";//設(shè)置允許上傳文件的擴(kuò)展名 private final static String UPLOAD_DIRECTORY="/upload/";//設(shè)置上傳的路徑 private String path; //上傳的絕對(duì)路徑 private ServletConfig config; final public void init(ServletConfig config) throws ServletException { this.config = config; path=config.getServletContext().getRealPath(UPLOAD_DIRECTORY)+"/"; } final public ServletConfig getServletConfig() { return config; } public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //PrintWriter out = response.getWriter(); } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html;charset=GBK"); //PrintWriter out = response.getWriter(); String filename=upload(config,request,response); watermark(filename);//生成水印 reduce(filename);//生成縮略圖 response.sendRedirect("/Test.htm"); } public void destroy () { } //********************************附加的一些自定義方法********************************// //上傳文件 private String upload(ServletConfig config,HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException { //初始化上傳組件 SmartUpload mySmartUpload=new SmartUpload(); mySmartUpload.initialize(config,request,response); mySmartUpload.setAllowedFilesList(FILE_EXTEND_NAME); mySmartUpload.setMaxFileSize(FILE_MAX_SIZE); //上傳文件 try{ mySmartUpload.upload(); //mySmartUpload.save(path);//注釋掉此行將用原始文件名來(lái)保存 //以下三行代碼利用Calendar對(duì)象生成一個(gè)隨機(jī)毫秒數(shù)來(lái)作為新的文件名保存 com.jspsmart.upload.File myFile=mySmartUpload.getFiles().getFile(0);//返回剛剛上傳的文件對(duì)象 String filename=String.valueOf(Calendar.getInstance().getTimeInMillis())+"."+myFile.getFileExt();//構(gòu)造文件名 myFile.saveAs(path+filename,SmartUpload.SAVE_PHYSICAL);//保存文件為新的文件名 return filename; }catch(Exception e){} return "0"; } //生成縮略圖 private void reduce(String filename){ //設(shè)置新文件的寬和高 int tagImageWidth=102; int tagImageHeight=120; ImageIcon srcFile=new ImageIcon(path+filename);//讀入源文件 Image srcImage =srcFile.getImage();//構(gòu)造Image對(duì)象 BufferedImage tagImage = new BufferedImage(tagImageWidth,tagImageHeight,BufferedImage.TYPE_INT_RGB);//構(gòu)造圖像緩存對(duì)象 tagImage.getGraphics().drawImage(srcImage,0,0,tagImageWidth,tagImageHeight,null);//繪制縮小后的圖 paint(tagImage,"s_"+filename); } //生成水印 private void watermark(String filename){ Color color=Color.RED;//前景色 Color backgroundColor=Color.WHITE;//背景色 String word="zengxiaomeng";//水印文字 String wartmarkfilename="fjsenlogo.jpg";//水印圖片地址 int watermarkLocationX=100; int watermarkLocationY=100; int wordLocationX=100; int wordLocationY=100; ImageIcon srcFile=new ImageIcon(path+filename);//讀入源文件 Image srcImage =srcFile.getImage();//構(gòu)造Image對(duì)象 ImageIcon watermarkFile=new ImageIcon(path+wartmarkfilename);//讀入水印文件 Image watermarkImage =watermarkFile.getImage();//構(gòu)造水印圖片對(duì)象 BufferedImage tagImage=new BufferedImage(srcImage.getWidth(null),srcImage.getHeight(null), BufferedImage.TYPE_INT_RGB);//構(gòu)造圖像緩存對(duì)象 Graphics2D g=tagImage.createGraphics( ); g.setColor(color);//設(shè)置繪圖筆的前景色 g.setBackground(backgroundColor);//設(shè)置繪圖筆的背景色 g.drawImage(srcImage, 0, 0, null );//先繪制源圖 g.drawImage(watermarkImage, watermarkLocationX,watermarkLocationY, null ); //添加水印圖片 g.drawString(word,wordLocationX,wordLocationY); //添加文字 g.dispose(); paint(tagImage,filename); } private void paint(BufferedImage tagImage,String tagFilename){ try{ FileOutputStream tagFile=new FileOutputStream(path+tagFilename); JPEGImageEncoder encoder=JPEGCodec.createJPEGEncoder(tagFile); JPEGEncodeParam param=encoder.getDefaultJPEGEncodeParam(tagImage); param.setQuality(50f, true); encoder.encode(tagImage, param); tagFile.close(); }catch(Exception e){} } } |
|
|
