BlogJava-stargazers-随笔分类-java apihttp://www.blogjava.net/lzj520/category/31984.htmlzh-cnThu, 06 Nov 2008 18:50:33 GMTThu, 06 Nov 2008 18:50:33 GMT60080813 结合使用SWFUpload和SmartUploadhttp://www.blogjava.net/lzj520/archive/2008/08/13/221659.htmllzj520lzj520Wed, 13 Aug 2008 03:57:00 GMThttp://www.blogjava.net/lzj520/archive/2008/08/13/221659.htmlhttp://www.blogjava.net/lzj520/comments/221659.htmlhttp://www.blogjava.net/lzj520/archive/2008/08/13/221659.html#Feedback0http://www.blogjava.net/lzj520/comments/commentRss/221659.htmlhttp://www.blogjava.net/lzj520/services/trackbacks/221659.html

<%@ page  contentType="text/html;  charset=GBK"%>
<%@ page import="javax.servlet.*"%>
<%@ page import="javax.servlet.http.*"%>
<%@ page import="com.yourcompany.util.*"%>
<html>
<head>
 <link href="js/default.css" rel="stylesheet" type="text/css" />
 <script type="text/javascript" src="js/swfupload.js"></script>
 <script type="text/javascript" src="js/handlers.js"></script>
   <script src="js/jquery.js" type="text/javascript"></script>
   <script type="text/javacript">
   function g(){
  $.ajax({
    url: 'upload2.jsp',
    date: {c: $('#c').val(), c: $('#c').val()},
    error: function() { alert"fail"},
    success: function(response) { ... }
    });
  }
   </script>
 <script type="text/javascript">

 var swfu;
  window.onload = function () {
  
   swfu = new SWFUpload({
    // Backend Settings
    upload_url: "upload2.jsp", // Relative to the SWF file
    post_params: {"product1": "1"},
        
        use_query_string:false,
    // File Upload Settings
    file_size_limit : "2048", // 2MB
    file_types : "*.jpg",
    file_types_description : "JPG Images",
    file_upload_limit : "0",

    // Event Handler Settings - these functions as defined in Handlers.js
    //  The handlers are not part of SWFUpload but are part of my website and control how
    //  my website reacts to the SWFUpload events.
    file_queue_error_handler : fileQueueError,
    file_dialog_complete_handler : fileDialogComplete,
    upload_progress_handler : uploadProgress,
    upload_start_handler : uploadStart,
    upload_error_handler : uploadError,
    upload_success_handler : uploadSuccess,
    upload_complete_handler : uploadComplete,

 


    // Flash Settings
    flash_url : "js/swfupload_f9.swf", // Relative to this file

    custom_settings : {
     upload_target : "divFileProgressContainer"
    },
    
    // Debug Settings
    debug: false
   });
  }

function uploadStart(file) {
var post_params = this.settings.post_params;
post_params.product = document.getElementById("product").value;
this.setPostParams(post_params);
return true;
}
 </script>
</head>
  <div id="SWFUploadTarget">
<body>

  <div>
   <form action="upload2.jsp" method="get">
    <button id="btnBrowse" type="button" style="padding: 5px;" onClick="swfu.selectFiles(); this.blur();"><img src="images/page_white_add.png" style="padding-right: 3px; vertical-align: bottom;">请选择图片<span style="font-size: 7pt;">(2 MB Max)</span></button>
                    请输入产品ID<input type="text" name="product" id="product" value="">
   </form>
  </div>
  <div id="divFileProgressContainer" style="height: 75px;"></div>
  <div id="thumbnails"></div>
 </div>
</body>
<html>

后台使用SmartUpload：

<%@ page contentType="text/html;charset=gb2312" language="java" import="java.io.*,java.awt.Image,java.awt.image.*,com.sun.image.codec.jpeg.*,
java.sql.*,com.jspsmart.upload.*,java.util.*,com.yourcompany.util.*"%>
<%
SmartUpload mySmartUpload =new SmartUpload();
long file_size_max=4000000;
//add


//初始化
 mySmartUpload.initialize(pageContext);
//只允许上载此类文件
try {
mySmartUpload.setAllowedFilesList("jpg,gif");
//上载文件
mySmartUpload.upload();
} catch (Exception e){
%>
  <SCRIPT language=javascript>
  alert("只允许上传.jpg和.gif类型图片文件");
  window.location=''upfile.jsp'';
  </script>
<%
}
//try{

    com.jspsmart.upload.File myFile = mySmartUpload.getFiles().getFile(0);
    if (myFile.isMissing()){%>
   <SCRIPT language=javascript>
   alert("请先选择要上传的文件");
   window.location=''upfile.jsp'';
   </script>
    <%}
    else{
 
 String fileName2="",ext="",testvar="";
 String productname=mySmartUpload.getRequest().getParameter("product");
 String url="/uploadfile/"+productname+"/";      //应保证在根目录中有此目录的存在


 java.io.File file1 = new java.io.File(request.getRealPath("/") + url );
   if(!file1.exists())
  {
   file1.mkdir();
  }


      //String myFileName=myFile.getFileName(); //取得上载的文件的文件名
   ext= myFile.getFileExt();      //取得后缀名
   int file_size=myFile.getSize();     //取得文件的大小 
   String saveurl="";
   if(file_size<file_size_max){

int temp=1,temp2=0;
    String[] a=myFile.getFileName().split(".jpg");
    String myFileNameo = productname+"_00_pic_big";
 String myFileName = productname+"_0"+temp;
   
    Calendar calendar = Calendar.getInstance();
    String filename = String.valueOf(calendar.getTimeInMillis());
    saveurl=request.getRealPath("/")+url;
    saveurl+=myFileNameo+"."+ext;          //保存路径
   

   
    myFile.saveAs(saveurl,mySmartUpload.SAVE_PHYSICAL);
  //  java.io.File  f1   =   new  java.io.File (saveurl);
  //  java.io.File    f2   =   new   java.io.File (request.getRealPath("/")+url+myFileName+"_0_big.jpg");  
  //  f1.renameTo(f2); 
    //out.print(filename);
//-----------------------上传完成，开始生成缩略图------------------------- 
 
 
 
 
 com.yourcompany.util.DirList dirlist = new com.pixel.util.DirList();
  String[] dir =dirlist.list(request.getRealPath("/") + url );


for(int i=0;i<dir.length;i++){
  //for (String i : dir){
  String[] split = dir[i].split("\\.");
      if(split[1].equals("jpg")){  
      String[] split2=split[0].split("\\_");
       //split2[1]=01                
   if(Integer.parseInt(split2[1])>0&Integer.parseInt(split2[1])>=temp2){
   temp2=Integer.parseInt(split2[1])+1;
   }
   if(Integer.parseInt(split2[1])==0){
   temp2=1;
   }
     }
} 

if(temp2<=10){
myFileName = productname+"_0"+temp2;
}else{
myFileName = productname+"_"+temp2;
}

 

   
 //myFileName = mySmartUpload.getRequest().getParameter("product");
    java.io.File file = new java.io.File(saveurl);        //读入刚才上传的文件
    String newurl=request.getRealPath("/")+url+myFileName+"_70_min."+ext;  //新的缩略图保存地址
    Image src = javax.imageio.ImageIO.read(file);                     //构造Image对象
    float tagsize=70;
    int old_w=src.getWidth(null);                                     //得到源图宽
    int old_h=src.getHeight(null);  
    int new_w=0;
    int new_h=0;                            //得到源图长
    int tempsize;
    float tempdouble;
    if(old_w>old_h){
     tempdouble=old_w/tagsize;
    }else{
     tempdouble=old_h/tagsize;
    }
    new_w=Math.round(old_w/tempdouble);
    new_h=Math.round(old_h/tempdouble);//计算新图长宽
    BufferedImage tag = new BufferedImage(new_w,new_h,BufferedImage.TYPE_INT_RGB);
    tag.getGraphics().drawImage(src,0,0,new_w,new_h,null);       //绘制缩小后的图
    FileOutputStream newimage=new FileOutputStream(newurl);          //输出到文件流
    JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(newimage);      
    encoder.encode(tag);                                               //近JPEG编码
     
            //读入刚才上传的文件
    newurl=request.getRealPath("/")+url+myFileName+"_130_min."+ext;  //新的缩略图保存地址
    //Image src = javax.imageio.ImageIO.read(file);                     //构造Image对象
    tagsize=130;
  //  int old_w2=src2.getWidth(null);                                     //得到源图宽
  //  int old_h2=src2.getHeight(null);  
   // int new_w=0;
   // int new_h=0;                            //得到源图长
   // int tempsize;
  //  float tempdouble;
    if(old_w>old_h){
     tempdouble=old_w/tagsize;
    }else{
     tempdouble=old_h/tagsize;
    }
    new_w=Math.round(old_w/tempdouble);
    new_h=Math.round(old_h/tempdouble);//计算新图长宽
     tag = new BufferedImage(new_w,new_h,BufferedImage.TYPE_INT_RGB);
    tag.getGraphics().drawImage(src,0,0,new_w,new_h,null);       //绘制缩小后的图
    newimage=new FileOutputStream(newurl);          //输出到文件流
    encoder = JPEGCodec.createJPEGEncoder(newimage);      
    encoder.encode(tag);                                               //近JPEG编码
   
     newurl=request.getRealPath("/")+url+myFileName+"_180_min."+ext;  //新的缩略图保存地址
    //Image src = javax.imageio.ImageIO.read(file);                     //构造Image对象
    tagsize=180;
  //  int old_w2=src2.getWidth(null);                                     //得到源图宽
  //  int old_h2=src2.getHeight(null);  
   // int new_w=0;
   // int new_h=0;                            //得到源图长
   // int tempsize;
  //  float tempdouble;
    if(old_w>old_h){
     tempdouble=old_w/tagsize;
    }else{
     tempdouble=old_h/tagsize;
    }
    new_w=Math.round(old_w/tempdouble);
    new_h=Math.round(old_h/tempdouble);//计算新图长宽
     tag = new BufferedImage(new_w,new_h,BufferedImage.TYPE_INT_RGB);
    tag.getGraphics().drawImage(src,0,0,new_w,new_h,null);       //绘制缩小后的图
    newimage=new FileOutputStream(newurl);          //输出到文件流
    encoder = JPEGCodec.createJPEGEncoder(newimage);      
    encoder.encode(tag);                                               //近JPEG编码

     newurl=request.getRealPath("/")+url+myFileName+"_500_min."+ext;  //新的缩略图保存地址
    //Image src = javax.imageio.ImageIO.read(file);                     //构造Image对象
    tagsize=500;
  //  int old_w2=src2.getWidth(null);                                     //得到源图宽
  //  int old_h2=src2.getHeight(null);  
   // int new_w=0;
   // int new_h=0;                            //得到源图长
   // int tempsize;
  //  float tempdouble;
    if(old_w>old_h){
     tempdouble=old_w/tagsize;
    }else{
     tempdouble=old_h/tagsize;
    }
    new_w=Math.round(old_w/tempdouble);
    new_h=Math.round(old_h/tempdouble);//计算新图长宽
     tag = new BufferedImage(new_w,new_h,BufferedImage.TYPE_INT_RGB);
    tag.getGraphics().drawImage(src,0,0,new_w,new_h,null);       //绘制缩小后的图
    newimage=new FileOutputStream(newurl);          //输出到文件流
    encoder = JPEGCodec.createJPEGEncoder(newimage);      
    encoder.encode(tag);                                               //近JPEG编码

 newurl=request.getRealPath("/")+url+myFileName+"_800_min."+ext;  //新的缩略图保存地址
    //Image src = javax.imageio.ImageIO.read(file);                     //构造Image对象
    tagsize=800;
  //  int old_w2=src2.getWidth(null);                                     //得到源图宽
  //  int old_h2=src2.getHeight(null);  
   // int new_w=0;
   // int new_h=0;                            //得到源图长
   // int tempsize;
  //  float tempdouble;
    if(old_w>old_h){
     tempdouble=old_w/tagsize;
    }else{
     tempdouble=old_h/tagsize;
    }
    new_w=Math.round(old_w/tempdouble);
    new_h=Math.round(old_h/tempdouble);//计算新图长宽
     tag = new BufferedImage(new_w,new_h,BufferedImage.TYPE_INT_RGB);
    tag.getGraphics().drawImage(src,0,0,new_w,new_h,null);       //绘制缩小后的图
    newimage=new FileOutputStream(newurl);          //输出到文件流
    encoder = JPEGCodec.createJPEGEncoder(newimage);      
    encoder.encode(tag);                                               //近JPEG编码
 
 
  newimage.close(); 

   }
   else{
    out.print("<SCRIPT language=''javascript''>");
    out.print("alert(''上传文件大小不能超过"+(file_size_max/1000)+"K'');");
    out.print("window.location=''upfile.jsp;''");
    out.print("</SCRIPT>");
   }
  }
//}catch (Exception e){

//e.toString();

//}
%>



其中：
com.yourcompany.util.DirList dirlist = new com.yourcompany.DirList();
  String[] dir =dirlist.list(request.getRealPath("/") + url );


for(int i=0;i<dir.length;i++){
  //for (String i : dir){
  String[] split = dir[i].split("\\.");
      if(split[1].equals("jpg")){  
      String[] split2=split[0].split("\\_");
       //split2[1]=01                
   if(Integer.parseInt(split2[1])>0&Integer.parseInt(split2[1])>=temp2){
   temp2=Integer.parseInt(split2[1])+1;
   }
   if(Integer.parseInt(split2[1])==0){
   temp2=1;
   }
     }
} 

if(temp2<=10){
myFileName = productname+"_0"+temp2;
}else{
myFileName = productname+"_"+temp2;
}


这部分调用一个方法，读取目录里的文件名，并重新按照01、02、03的顺序命名。
获取目录里的文件名的类：

import java.io.File;
import java.io.FilenameFilter;
import java.util.Arrays;
import java.util.Comparator;
import java.util.regex.Pattern;
public class DirList {
 public String[] list(String thepath) {  
  File path = new File(thepath);  
  String[] list;  
  list = path.list();  
  Arrays.sort(list, new AlphabeticComparator());
  return list;
 }
}

class DirFilter implements FilenameFilter { 
 private Pattern pattern;  public DirFilter(String regex) {
  pattern = Pattern.compile(regex);  }
 public boolean accept(File dir, String name) {  
  // Strip path information, search for regex:  
  return pattern.matcher(new File(name).getName()).matches();
  }
 }

class AlphabeticComparator implements Comparator {
 public int compare(Object o1, Object o2) {  
  String s1 = (String) o1;    String s2 = (String) o2;   
  return s1.toLowerCase().compareTo(s2.toLowerCase()); 
  }
 }



lzj520 2008-08-13 11:57 发表评论
]]>JAVA 2D的一些应用http://www.blogjava.net/lzj520/archive/2008/06/05/206126.htmllzj520lzj520Thu, 05 Jun 2008 10:17:00 GMThttp://www.blogjava.net/lzj520/archive/2008/06/05/206126.htmlhttp://www.blogjava.net/lzj520/comments/206126.htmlhttp://www.blogjava.net/lzj520/archive/2008/06/05/206126.html#Feedback0http://www.blogjava.net/lzj520/comments/commentRss/206126.htmlhttp://www.blogjava.net/lzj520/services/trackbacks/206126.html
合成图像：比如制作个性印章。首先需要准备2张图，1张白色的图片：bg.jpg，一张是印章的边框的图片template.gif，需要处理成透明。（制作这样风格的图片，可以使用photoshop的“置换”滤镜）：

 
template.gif

程序处理部分是需要把输入的文字，和选择的template合成到bg.jpg里，在这里，我硬编码了输入文字到程序里，template使用已经准备好了的template.gif，当然，可以有更多的template提供给用户选择。bg.jpg是一张90×90的jpg全白色文件。这些我都暂时放在C盘根目录下。程序处理如下：

import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import javax.imageio.ImageIO;
import com.sun.image.codec.jpeg.*;

public class TestDrawFont {
public static void main(String[] args) {
try {
BufferedImage image = ImageIO.read(new FileInputStream("c:\\bg.jpg"));
Graphics2D g = image.createGraphics();
BufferedImage image_template = ImageIO.read(new FileInputStream("c:\\template.gif"));
g.setColor(Color.red);
g.setFont(new Font("汉鼎简中黑",Font.ITALIC + Font.BOLD + Font.LAYOUT_LEFT_TO_RIGHT, 23));//写入签名
g.drawString("帅哥",22, image.getHeight() - 50);
g.drawString("印章",22, image.getHeight()-30);
g.drawImage(image_template, 5,image.getHeight() - 85, image_template.getWidth(null),image_template.getHeight(null), null);
g.dispose();
FileOutputStream out = new FileOutputStream("c:\\all.jpg");
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
encoder.encode(image);
out.close();
} catch(Exception e) {
e.printStackTrace();
}
}
}


执行后的效果是：



补充一下：

Java 2 平台可以区分两种字体：物理 字体和逻辑 字体。

物理 字体是实际的字体库，包含字形数据和表，这些数据和表使用字体技术（如 TrueType 或 PostScript Type 1）将字符序列映射到字形序列。Java 2 平台的所有实现都支持 TrueType 字体；对其他字体技术的支持是与实现相关的。物理字体可以使用字体名称，如 Helvetica、Palatino、HonMincho 或任意数量的其他字体名称。通常，每种物理字体只支持有限的书写系统集合，例如，只支持拉丁文字符或只支持日文和基本拉丁文。可用的物理字体集合随配置的不同而不同。要求特定字体的应用程序可以使用 createFont 方法来捆绑这些字体，并对其进行实例化。



构造方法摘要
Font(String name, int style, int size)
          根据指定名称、样式和点大小，创建一个新 Font
         


public abstract void drawString(String s,
                                float x,
                                float y)
       

public abstract void drawImage(BufferedImage img,
                               BufferedImageOp op,
                               int x,
                               int y)




lzj520 2008-06-05 18:17 发表评论
]]>