用JAVA将大图片文件转换出小的缩略图文件-JSP教程,Java技巧及代码

用java将大图片文件转换出小的缩略图文件,要求使用jdk1.4,

大家可以将这段程序代码改为javabean,以便在web环境中使用,

转换出的小缩略图效果不错!

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 imgtest {

public static void main (string argv[]) {

try {

file fi = new file("c:/image2.jpg"); //大图文件

file fo = new file("c:/imgtest.jpg"); //将要转换出的小图文件

int nw = 100;

affinetransform transform = new affinetransform();

bufferedimage bis = imageio.read(fi);

int w = bis.getwidth();

int h = bis.getheight();

double scale = (double)w/h;

int nh = (nw*h)/w ;

double sx = (double)nw/w;

double sy = (double)nh/h;

transform.settoscale(sx,sy);

system.out.println(w + " " +h);

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();

}

}

}