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";//設置允許上傳文件的擴展名
????private?final?static?String?UPLOAD_DIRECTORY="/upload/";//設置上傳的路徑
????private?String?path;?//上傳的絕對路徑
????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保存
????????????//以下三行代碼利用Calendar對象生成一個隨機毫秒數來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象
????????????String?filename=String.valueOf(Calendar.getInstance().getTimeInMillis())+"."+myFile.getFileExt();//構造文件名
????????????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();//構造Image對象?
????????BufferedImage?tagImage?=?new?BufferedImage(tagImageWidth,tagImageHeight,BufferedImage.TYPE_INT_RGB);//構造圖像緩存對象
????????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();//構造Image對象????????
????????ImageIcon?watermarkFile=new?ImageIcon(path+wartmarkfilename);//讀入水印文件
????????Image?watermarkImage?=watermarkFile.getImage();//構造水印圖片對象????????
????????BufferedImage?tagImage=new?BufferedImage(srcImage.getWidth(null),srcImage.getHeight(null),?BufferedImage.TYPE_INT_RGB);//構造圖像緩存對象?
????????
????????Graphics2D?g=tagImage.createGraphics(?);?
????????g.setColor(color);//設置繪圖筆的前景色
????????g.setBackground(backgroundColor);//設置繪圖筆的背景色
????????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){}?
????}
}