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来自 , 2021-03-03, 写在 Java, 查看 106 次.
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import
java.io.*
;
import
javax.swing.*
;
public
class
Start
{
public
static
void
main
(
String
args
[
]
)
throws
Exception
{
//源文件,必须存在,路径可选
File
sf
=
new
File
(
"H:/javapro/files/source.jpg"
)
;
//目的文件,因为要向其中写入,指定文件可以不存在,由程序生成
File
df
=
new
File
(
"H:/javapro/files/dest.jpg"
)
;
new
ReadWriteGra
(
sf,df
)
;
new
UseGra
(
df
)
;
}
}
class
ReadWriteGra
{
FileInputStream
in
=
null
;
FileOutputStream
out
=
null
;
public
ReadWriteGra
(
File
sourceFile,
File
destFile
)
throws
Exception
{
byte
[
]
buf
=
new
byte
[
1024
]
;
int
len
=
0
;
in
=
new
FileInputStream
(
sourceFile
)
;
out
=
new
FileOutputStream
(
destFile,
true
)
;
while
(
(
len
=
in.
read
(
buf
)
)
!=
-
1
)
{
out.
write
(
buf,
0
,len
)
;
}
out.
close
(
)
;
}
}
class
UseGra
extends
JFrame
{
public
UseGra
(
File
picFile
)
throws
Exception
{
this
.
setVisible
(
true
)
;
this
.
setResizable
(
false
)
;
this
.
setLayout
(
null
)
;
this
.
setBounds
(
600
,
200
,
400
,
370
)
;
this
.
setDefaultCloseOperation
(
DISPOSE_ON_CLOSE
)
;
JPanel
p1
=
(
JPanel
)
this
.
getContentPane
(
)
;
p1.
setOpaque
(
false
)
;
p1.
setLayout
(
null
)
;
InputStream
is
=
new
FileInputStream
(
picFile
)
;
ByteArrayOutputStream
baos
=
new
ByteArrayOutputStream
(
)
;
int
b
=
0
;
while
(
(
b
=
is.
read
(
)
)
!=-
1
)
{
baos.
write
(
b
)
;
}
ImageIcon
image
=
new
ImageIcon
(
baos.
toByteArray
(
)
)
;
JLabel
background
=
new
JLabel
(
image
)
;
this
.
getLayeredPane
(
)
.
add
(
background,
new
Integer
(
Integer
.
MIN_VALUE
)
)
;
background.
setBounds
(
0
,
0
, image.
getIconWidth
(
)
, image.
getIconHeight
(
)
)
;
JButton
bt
=
new
JButton
(
"Test_Button"
)
;
p1.
add
(
bt
)
;
bt.
setBounds
(
10
,
10
,
150
,
25
)
;
validate
(
)
;
}
}
//java/6507
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import java.io.*; import javax.swing.*; public class Start { public static void main(String args[]) throws Exception{ //源文件,必须存在,路径可选 File sf = new File("H:/javapro/files/source.jpg"); //目的文件,因为要向其中写入,指定文件可以不存在,由程序生成 File df = new File("H:/javapro/files/dest.jpg"); new ReadWriteGra(sf,df); new UseGra(df); } } class ReadWriteGra { FileInputStream in = null; FileOutputStream out = null; public ReadWriteGra(File sourceFile,File destFile) throws Exception{ byte[] buf = new byte[1024]; int len = 0; in = new FileInputStream(sourceFile); out = new FileOutputStream(destFile,true); while( (len = in.read(buf)) != -1 ){ out.write(buf,0,len); } out.close(); } } class UseGra extends JFrame { public UseGra(File picFile) throws Exception{ this.setVisible(true); this.setResizable(false); this.setLayout(null); this.setBounds(600, 200, 400, 370); this.setDefaultCloseOperation(DISPOSE_ON_CLOSE); JPanel p1 = (JPanel)this.getContentPane(); p1.setOpaque(false); p1.setLayout(null); InputStream is = new FileInputStream(picFile); ByteArrayOutputStream baos = new ByteArrayOutputStream(); int b = 0; while((b = is.read())!=-1){ baos.write(b); } ImageIcon image = new ImageIcon(baos.toByteArray()); JLabel background = new JLabel(image); this.getLayeredPane().add(background, new Integer(Integer.MIN_VALUE)); background.setBounds(0, 0, image.getIconWidth(), image.getIconHeight()); JButton bt = new JButton("Test_Button"); p1.add(bt); bt.setBounds(10,10,150,25); validate(); } } //java/6507
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