import
java.awt.RenderingHints;
import
java.awt.Toolkit;
import
java.awt.image.BufferedImage;
import
java.io.BufferedInputStream;
import
java.io.BufferedOutputStream;
import
java.io.File;
import
java.io.FileInputStream;
import
java.io.FileOutputStream;
import
java.sql.Timestamp;
import
java.util.Date;
import
java.util.UUID;
import
javax.imageio.ImageIO;
import
wfc.service.database.BlobHelper;
import
...Condition;
import
...Conditions;
import
...SQL;
public
class
imageThumbnail {
private
static
void
createThumbnail(String filename,
int
thumbWidth,
int
thumbHeight, String outFilename)
throws
Exception{
//
根据地址载入图片
Image image =
Toolkit.getDefaultToolkit().getImage(filename);
MediaTracker mediaTracker
=
new
MediaTracker(
new
Container());
mediaTracker.addImage(image,
0
);
mediaTracker.waitForID(
0
);
double
thumbRatio = (
double
)thumbWidth / (
double
)thumbHeight;
int
imageWidth = image.getWidth(
null
);
int
imageHeight = image.getHeight(
null
);
double
imageRatio = (
double
)imageWidth / (
double
)imageHeight;
if
(thumbRatio <
imageRatio) {
thumbHeight
= (
int
)(thumbWidth /
imageRatio);
}
else
{
thumbWidth
= (
int
)(thumbHeight *
imageRatio);
BufferedImage thumbImage
=
new
BufferedImage(thumbWidth, thumbHeight, BufferedImage.TYPE_INT_RGB);
Graphics2D graphics2D
=
thumbImage.createGraphics();
graphics2D.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
graphics2D.drawImage(image,
0, 0, thumbWidth, thumbHeight,
null
);
File fileThumbnail
=
new
File(outFilename);
ImageIO.write(thumbImage,
"jpg"
, fileThumbnail);
//
获取缩略图做其他业务用--放在别处
BufferedInputStream in =
new
BufferedInputStream(
new
FileInputStream(outFilename));
File file
=
new
File("C:\\Users\\Desktop\\jjjj.jpg"
);
if
(file !=
null
) {
file.createNewFile();
//
指定要写入文件的缓冲输出字节流
BufferedOutputStream out =
new
BufferedOutputStream(
new
FileOutputStream(file));
byte
[] bb =
new
byte
[1024];
//
用来存储每次读取到的字节数组
int
n;
//
每次读取到的字节数组的长度
while
((n = in.read(bb)) != -1
) {
out.write(bb,
0, n);
//
写入到输出流
out.close();
//
关闭流
in.close();
fileThumbnail.delete();
//
删除缩略图
//
或把缩略图入库
byte
[] filebyte =
FileLoadUtil.File2byte(fileThumbnail);
Timestamp saveTime
=
new
Timestamp(
new
Date().getTime());
String uuid
=
UUID.randomUUID().toString();
String fjId
= "202004"+
UUID.randomUUID().toString();
String sql
= "insert into DAN_FJ(FJ_ID,ST_APP_ID,TIME) values (?,?,?)"
;
Object[] objects
=
new
Object[] {uuid,fjId,saveTime};
SQL.execute(sql,objects);
Conditions conds
=
Conditions.newOrConditions();
conds.add(
new
Condition("FJ_ID"
, Condition.OT_EQUAL, uuid));
BlobHelper.setBlob(
"DAN_FJ", "APPLY_FJ"
, conds.toString(),filebyte, conds.getObjectArray());
fileThumbnail.delete();
//
删除缩略图
public
static
void
main(String[] args)
throws
Exception {
//
原地址，缩略图高，宽，输出地址和缩略图名
createThumbnail("C:\\Users\\Desktop\\jj.jpg",100,75,"C:\\Users\\Desktop\\jjj.jpg"
);
* 将文件转换成byte数组
*
@param
filePath
*
@return
public
static
byte
[] File2byte(File tradeFile){
byte
[] buffer =
null
;
FileInputStream fis
=
new
FileInputStream(tradeFile);
ByteArrayOutputStream bos
=
new
ByteArrayOutputStream();
byte
[] b =
new
byte
[10240
];
int
n;
while
((n = fis.read(b)) != -1
)
bos.write(b,
0
, n);
fis.close();
bos.close();
buffer
=
bos.toByteArray();
}
catch
(FileNotFoundException e){
e.printStackTrace();
}
catch
(IOException e){
e.printStackTrace();
return
buffer;
