package com.kay.util;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Date;
import java.awt.image.BufferedImage;
import java.awt.Image;
import java.awt.image.AffineTransformOp;
import javax.imageio.ImageIO;
import java.awt.geom.AffineTransform;
public class ImageModify {
/**
* @param filePath
* 图片的原始目录
* @param dirPath
* 处理后的图片存放目录
* @param file
* 原始图片
* @param dirName
* 处理后的图片文件名前缀
* @throws Exception
*
*/
public static void main(String []args) throws Exception{
// ImageModify m=new ImageModify();
// String filePath="f://image";
// String dirPath="f://image";
// String file="a.gif";
// String dirName="img"+(new Date()).getTime();
// if(m.modify(filePath,dirPath,file,dirName)){
// System.out.println("图像处理成功！");
// }
}
public static void modify(String filePath,String dirPath,String file,String dirName) throws Exception {
// ext是图片的格式 gif JPG 或png
String ext = "";
double Ratio = 0.0;
File F = new File(filePath, file);
// if (!F.isFile())
// throw new Exception(F
// + " is not image file error in CreateThumbnail！");
// 首先判断上传的图片是gif还是JPG ImageIO只能将gif转换为png
// if (isJpg(imgfile)) {
// ext = "jpg";
// } else {
ext = "jpg";
// }
File dir=new File(dirPath);
if(!dir.exists()){
dir.mkdir();
}
File ThF = new File(dirPath, dirName);
if(!ThF.exists()){
ThF.createNewFile();
}
BufferedImage Bi = ImageIO.read(F);
// 假设图片宽 高 最大为120 120
Image Itemp = Bi.getScaledInstance(120, 120, Bi.SCALE_SMOOTH);
if ((Bi.getHeight() > 120) || (Bi.getWidth() > 120)) {
if (Bi.getHeight() > Bi.getWidth())
Ratio = 120.0 / Bi.getHeight();
else
Ratio = 120.0 / Bi.getWidth();
}
AffineTransformOp op = new AffineTransformOp(AffineTransform
.getScaleInstance(Ratio, Ratio), null);
Itemp = op.filter(Bi, null);
try {
ImageIO.write((BufferedImage) Itemp, ext, ThF);
} catch (Exception ex) {
throw new Exception(" ImageIo.write error in CreatThum.： "
+ ex.getMessage());
}
// return (true);
}
public static void upload(File file, String fileName, String path) throws IOException{
InputStream is = null;
OutputStream os = null;
try
{
File dir = new File(path);
if (!dir.exists())
{
dir.mkdirs();
}
if (!file.exists())
{
file.createNewFile();
}
is = new FileInputStream(file.toString());
String name = fileName.trim().toString();// 得到上传文件的原名称
File destFile = new File(path, name);
os = new FileOutputStream(destFile);
byte[] buffer = new byte[400];
int length = 0;
while ((length = is.read(buffer)) > 0)
{
os.write(buffer, 0, length);
}
}
catch (Exception e)
{
e.printStackTrace();
}
finally
{
is.close();
os.close();
}
}
}
不晓得这个是不是你要的效果