Java Code Examples for java.awt.Graphics2D#drawString()
The following examples show how to use
java.awt.Graphics2D#drawString() .
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Example 1
| Source File: BoxContainerPanelUI.java From pumpernickel with MIT License | 6 votes |
|
protected void paintBox(Graphics2D g, Box box) {
if (box.getComponent() != null) {
return;
}
Rectangle r = box.getBounds();
g.setColor(Color.lightGray);
g.setPaint(new GradientPaint(0, r.y, new Color(0xffffff), 0, r.y
+ r.height, new Color(0xdddddd)));
g.fill(r);
g.setColor(Color.darkGray);
g.draw(r);
g.setColor(Color.black);
String boxName = box.toString();
Rectangle2D bounds = g.getFont().getStringBounds(boxName,
g.getFontRenderContext());
if (bounds.getWidth() + 10 > r.width) {
r.setBounds(r.x, r.y, (int) (Math.ceil(bounds.getWidth()) + 10.5),
r.height);
}
g.drawString(boxName, r.x + 5, r.y + 15);
}
Example 2
| Source File: HintonDiagram.java From rapidminer-studio with GNU Affero General Public License v3.0 | 6 votes |
|
private void drawToolTip(Graphics2D g) {
if (currentToolTip != null) {
g.setFont(LABEL_FONT);
Rectangle2D stringBounds = LABEL_FONT.getStringBounds(currentToolTip, g.getFontRenderContext());
g.setColor(TOOLTIP_COLOR);
Rectangle2D bg = new Rectangle2D.Double(toolTipX - stringBounds.getWidth() / 2 - 4, toolTipY
- stringBounds.getHeight() / 2 - 2, stringBounds.getWidth() + 5, Math.abs(stringBounds.getHeight()) + 3);
g.fill(bg);
g.setColor(Color.black);
g.draw(bg);
g.drawString(currentToolTip, (float) (toolTipX - stringBounds.getWidth() / 2) - 2, (float) (toolTipY + 3));
}
}
Example 3
| Source File: YGuardLogParser.java From yGuard with MIT License | 6 votes |
|
public void paintIcon(Component c, Graphics g, int x, int y) {
g.translate(x, y);
g.setColor(color);
Graphics2D g2d = (Graphics2D) g;
Object a = g2d.getRenderingHint(RenderingHints.KEY_ANTIALIASING);
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
g2d.fill(circle);
g2d.setColor(color.darker());
g2d.draw(circle);
float width = (float) g2d.getFontMetrics().getStringBounds(label, g2d).getWidth();
g2d.setColor(Color.black);
g2d.drawString(label, 9 - width * 0.5f, 14);
g2d.setColor(Color.white);
g2d.drawString(label, 8 - width * 0.5f, 13);
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, a);
g.translate(-x, -y);
}
Example 4
| Source File: VerifyCodeUtil.java From xxshop with Apache License 2.0 | 6 votes |
|
public BufferedImage getImage () {
BufferedImage image = createImage();
Graphics2D g2 = (Graphics2D)image.getGraphics();
StringBuilder sb = new StringBuilder();
for(int i = 0; i < 4; i++) {
String s = randomChar() + "";
sb.append(s);
float x = i * 1.0F * w / 4;
g2.setFont(randomFont());
g2.setColor(randomColor());
g2.drawString(s, x, h-5);
}
this.text = sb.toString();
drawLine(image);
return image;
}
Example 5
| Source File: RenderToCustomBufferTest.java From jdk8u-jdk with GNU General Public License v2.0 | 5 votes |
|
private static void renderTo(BufferedImage dst) {
System.out.println("The buffer: " + dst);
Graphics2D g = dst.createGraphics();
final int w = dst.getWidth();
final int h = dst.getHeight();
g.setColor(Color.blue);
g.fillRect(0, 0, w, h);
g.setColor(Color.red);
Font f = g.getFont();
g.setFont(f.deriveFont(48f));
g.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING,
RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
// NB: this clip ctriggers the problem
g.setClip(50, 50, 200, 100);
g.drawString("AA Text", 52, 90);
g.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING,
RenderingHints.VALUE_TEXT_ANTIALIAS_OFF);
// NB: this clip ctriggers the problem
g.setClip(50, 100, 100, 100);
g.drawString("Text", 52, 148);
g.dispose();
}
Example 6
| Source File: TestTransform.java From jdk8u-jdk with GNU General Public License v2.0 | 5 votes |
|
public static void testTransformedFont(AffineTransform a, Object textHint) {
BufferedImage bi = new BufferedImage(200, 200,
BufferedImage.TYPE_INT_RGB);
Graphics2D g2 = (Graphics2D) bi.getGraphics();
g2.setFont(g2.getFont().deriveFont(12.0f));
g2.setTransform(a);
g2.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, textHint);
g2.drawString("test", 100, 100);
}
Example 7
| Source File: IncorrectTextSize.java From jdk8u60 with GNU General Public License v2.0 | 5 votes |
|
public static void main(final String[] args) throws IOException {
for (int point = 5; point < 11; ++point) {
Graphics2D g2d = bi.createGraphics();
g2d.setFont(new Font(Font.DIALOG, Font.PLAIN, point));
g2d.scale(scale, scale);
g2d.setColor(Color.WHITE);
g2d.fillRect(0, 0, width, height);
g2d.setColor(Color.green);
g2d.drawString(TEXT, 0, 20);
int length = g2d.getFontMetrics().stringWidth(TEXT);
if (length < 0) {
throw new RuntimeException("Negative length");
}
for (int i = (length + 1) * scale; i < width; ++i) {
for (int j = 0; j < height; ++j) {
if (bi.getRGB(i, j) != Color.white.getRGB()) {
g2d.drawLine(length, 0, length, height);
ImageIO.write(bi, "png", new File("image.png"));
System.out.println("length = " + length);
System.err.println("Wrong color at x=" + i + ",y=" + j);
System.err.println("Color is:" + new Color(bi.getRGB(i,
j)));
throw new RuntimeException("Test failed.");
}
}
}
g2d.dispose();
}
}
Example 8
| Source File: ProgressBarUI.java From rapidminer-studio with GNU Affero General Public License v3.0 | 5 votes |
|
private void drawString(Graphics2D g2, int w, int h, boolean compressed) {
if (progressBar.isStringPainted()) {
// need to reduce font size to fit available space.
// DO NOT CALL THIS EVERY TIME AS IT'S TREMENDOUSLY EXPENSIVE!!!
if (compressed && progressBar.getFont().getSize() != 11) {
progressBar.setFont(progressBar.getFont().deriveFont(11f));
}
FontMetrics fontSizer = progressBar.getFontMetrics(progressBar.getFont());
String displayString = progressBar.getString();
if (displayString == null || displayString.trim().isEmpty()) {
return;
}
int stringHeight = fontSizer.getHeight();
int stringWidth = fontSizer.stringWidth(displayString);
// if string is too wide, cut beginning off until it fits
while (stringWidth > w * 2) {
displayString = displayString.substring(0, (int) (displayString.length() * 0.9));
stringWidth = fontSizer.stringWidth(displayString);
}
g2.setColor(Colors.TEXT_FOREGROUND);
if (compressed) {
g2.drawString(displayString, (int) Math.max(0, w / 0.33 - w - stringWidth - 5), h - (h - stringHeight) / 2
- 1);
} else {
g2.drawString(displayString, w - stringWidth, h + stringHeight - 1);
}
}
}
Example 9
| Source File: TerritoryNameDrawable.java From triplea with GNU General Public License v3.0 | 5 votes |
|
private static void draw(
final Rectangle bounds,
final Graphics2D graphics,
final int x,
final int y,
final Image img,
final String prod,
final boolean drawFromTopLeft) {
int normalizedY = y;
if (img == null) {
if (graphics.getFont().getSize() <= 0) {
return;
}
if (drawFromTopLeft) {
final FontMetrics fm = graphics.getFontMetrics();
normalizedY += fm.getHeight();
}
graphics.drawString(prod, x - bounds.x, normalizedY - bounds.y);
} else {
// we want to be consistent
// drawString takes y as the base line position
// drawImage takes x as the top right corner
if (!drawFromTopLeft) {
normalizedY -= img.getHeight(null);
}
graphics.drawImage(img, x - bounds.x, normalizedY - bounds.y, null);
}
}
Example 10
| Source File: MindMapPanel.java From netbeans-mmd-plugin with Apache License 2.0 | 5 votes |
|
private static void drawErrorText(@Nonnull final Graphics2D gfx, @Nonnull final Dimension fullSize, @Nonnull final String error) {
final Font font = new Font(Font.DIALOG, Font.BOLD, 24);
final FontMetrics metrics = gfx.getFontMetrics(font);
final Rectangle2D textBounds = metrics.getStringBounds(error, gfx);
gfx.setFont(font);
gfx.setColor(Color.DARK_GRAY);
gfx.fillRect(0, 0, fullSize.width, fullSize.height);
final int x = (int) (fullSize.width - textBounds.getWidth()) / 2;
final int y = (int) (fullSize.height - textBounds.getHeight()) / 2;
gfx.setColor(Color.BLACK);
gfx.drawString(error, x + 5, y + 5);
gfx.setColor(Color.RED.brighter());
gfx.drawString(error, x, y);
}
Example 11
| Source File: MiningCoalBagOverlay.java From plugins with GNU General Public License v3.0 | 5 votes |
|
@Override
public void renderItemOverlay(Graphics2D graphics, int itemId, WidgetItem itemWidget)
{
if (!config.showCoalBagOverlay() || (itemId != ItemID.COAL_BAG && itemId != ItemID.COAL_BAG_12019))
{
return;
}
graphics.setFont(FontManager.getRunescapeSmallFont());
graphics.setColor(Color.WHITE);
Point location = itemWidget.getCanvasLocation();
graphics.drawString(config.amountOfCoalInCoalBag() + "", location.getX(), location.getY() + 14);
}
Example 12
| Source File: GeoAgeLabel.java From ET_Redux with Apache License 2.0 | 5 votes |
|
/**
*
* @param g2d
*/
public void paint(Graphics2D g2d) {
g2d.setFont(new Font(
"SansSerif",
Font.PLAIN,
10));
Rectangle2D level1GeoAge = new Rectangle2D.Double(0, 0, width - 0.1, height - 0.1);
g2d.draw(level1GeoAge);
g2d.drawString(label, (float)1, (float)(height - 2));
}
Example 13
| Source File: TextUtilities.java From astor with GNU General Public License v2.0 | 5 votes |
|
/**
* Draws a string such that the specified anchor point is aligned to the
* given (x, y) location.
*
* @param text the text.
* @param g2 the graphics device.
* @param x the x coordinate (Java 2D).
* @param y the y coordinate (Java 2D).
* @param anchor the anchor location.
*
* @return The text bounds (adjusted for the text position).
*/
public static Rectangle2D drawAlignedString(String text,
Graphics2D g2, float x, float y, TextAnchor anchor) {
Rectangle2D textBounds = new Rectangle2D.Double();
float[] adjust = deriveTextBoundsAnchorOffsets(g2, text, anchor,
textBounds);
// adjust text bounds to match string position
textBounds.setRect(x + adjust[0], y + adjust[1] + adjust[2],
textBounds.getWidth(), textBounds.getHeight());
g2.drawString(text, x + adjust[0], y + adjust[1]);
return textBounds;
}
Example 14
| Source File: Regression_139388_swing.java From birt with Eclipse Public License 1.0 | 4 votes |
|
/**
* Presents the Exceptions if the chart cannot be displayed properly.
*
* @param g2d
* @param ex
*/
private final void showException( Graphics2D g2d, Exception ex )
{
String sWrappedException = ex.getClass( ).getName( );
Throwable th = ex;
while ( ex.getCause( ) != null )
{
ex = (Exception) ex.getCause( );
}
String sException = ex.getClass( ).getName( );
if ( sWrappedException.equals( sException ) )
{
sWrappedException = null;
}
String sMessage = null;
if ( th instanceof BirtException )
{
sMessage = ( (BirtException) th ).getLocalizedMessage( );
}
else
{
sMessage = ex.getMessage( );
}
if ( sMessage == null )
{
sMessage = "<null>";//$NON-NLS-1$
}
StackTraceElement[] stea = ex.getStackTrace( );
Dimension d = getSize( );
Font fo = new Font( "Monospaced", Font.BOLD, 14 );//$NON-NLS-1$
g2d.setFont( fo );
FontMetrics fm = g2d.getFontMetrics( );
g2d.setColor( Color.WHITE );
g2d.fillRect( 20, 20, d.width - 40, d.height - 40 );
g2d.setColor( Color.BLACK );
g2d.drawRect( 20, 20, d.width - 40, d.height - 40 );
g2d.setClip( 20, 20, d.width - 40, d.height - 40 );
int x = 25, y = 20 + fm.getHeight( );
g2d.drawString( "Exception:", x, y );//$NON-NLS-1$
x += fm.stringWidth( "Exception:" ) + 5;//$NON-NLS-1$
g2d.setColor( Color.RED );
g2d.drawString( sException, x, y );
x = 25;
y += fm.getHeight( );
if ( sWrappedException != null )
{
g2d.setColor( Color.BLACK );
g2d.drawString( "Wrapped In:", x, y );//$NON-NLS-1$
x += fm.stringWidth( "Wrapped In:" ) + 5;//$NON-NLS-1$
g2d.setColor( Color.RED );
g2d.drawString( sWrappedException, x, y );
x = 25;
y += fm.getHeight( );
}
g2d.setColor( Color.BLACK );
y += 10;
g2d.drawString( "Message:", x, y );//$NON-NLS-1$
x += fm.stringWidth( "Message:" ) + 5;//$NON-NLS-1$
g2d.setColor( Color.BLUE );
g2d.drawString( sMessage, x, y );
x = 25;
y += fm.getHeight( );
g2d.setColor( Color.BLACK );
y += 10;
g2d.drawString( "Trace:", x, y );//$NON-NLS-1$
x = 40;
y += fm.getHeight( );
g2d.setColor( Color.GREEN.darker( ) );
for ( int i = 0; i < stea.length; i++ )
{
g2d.drawString( stea[i].getClassName( ) + ":"//$NON-NLS-1$
+ stea[i].getMethodName( ) + "(...):"//$NON-NLS-1$
+ stea[i].getLineNumber( ), x, y );
x = 40;
y += fm.getHeight( );
}
}
Example 15
| Source File: MeterPlot.java From openstock with GNU General Public License v3.0 | 4 votes |
|
/**
* Draws a tick on the dial.
*
* @param g2 the graphics device.
* @param meterArea the meter area.
* @param value the tick value.
* @param label a flag that controls whether or not a value label is drawn.
*/
protected void drawTick(Graphics2D g2, Rectangle2D meterArea,
double value, boolean label) {
double valueAngle = valueToAngle(value);
double meterMiddleX = meterArea.getCenterX();
double meterMiddleY = meterArea.getCenterY();
g2.setPaint(this.tickPaint);
g2.setStroke(new BasicStroke(2.0f));
double valueP2X;
double valueP2Y;
double radius = (meterArea.getWidth() / 2) + DEFAULT_BORDER_SIZE;
double radius1 = radius - 15;
double valueP1X = meterMiddleX
+ (radius * Math.cos(Math.PI * (valueAngle / 180)));
double valueP1Y = meterMiddleY
- (radius * Math.sin(Math.PI * (valueAngle / 180)));
valueP2X = meterMiddleX
+ (radius1 * Math.cos(Math.PI * (valueAngle / 180)));
valueP2Y = meterMiddleY
- (radius1 * Math.sin(Math.PI * (valueAngle / 180)));
Line2D.Double line = new Line2D.Double(valueP1X, valueP1Y, valueP2X,
valueP2Y);
g2.draw(line);
if (this.tickLabelsVisible && label) {
String tickLabel = this.tickLabelFormat.format(value);
g2.setFont(this.tickLabelFont);
g2.setPaint(this.tickLabelPaint);
FontMetrics fm = g2.getFontMetrics();
Rectangle2D tickLabelBounds
= TextUtilities.getTextBounds(tickLabel, g2, fm);
double x = valueP2X;
double y = valueP2Y;
if (valueAngle == 90 || valueAngle == 270) {
x = x - tickLabelBounds.getWidth() / 2;
}
else if (valueAngle < 90 || valueAngle > 270) {
x = x - tickLabelBounds.getWidth();
}
if ((valueAngle > 135 && valueAngle < 225)
|| valueAngle > 315 || valueAngle < 45) {
y = y - tickLabelBounds.getHeight() / 2;
}
else {
y = y + tickLabelBounds.getHeight() / 2;
}
g2.drawString(tickLabel, (float) x, (float) y);
}
}
Example 16
| Source File: FontPanel.java From TencentKona-8 with GNU General Public License v2.0 | 4 votes |
|
private void modeSpecificDrawLine( Graphics2D g2, String line,
int baseX, int baseY ) {
/// ABP - keep track of old tform, restore it later
AffineTransform oldTx = null;
oldTx = g2.getTransform();
g2.translate( baseX, baseY );
g2.transform( getAffineTransform( g2Transform ) );
switch ( drawMethod ) {
case DRAW_STRING:
g2.drawString( line, 0, 0 );
break;
case DRAW_CHARS:
g2.drawChars( line.toCharArray(), 0, line.length(), 0, 0 );
break;
case DRAW_BYTES:
try {
byte lineBytes[] = line.getBytes( "ISO-8859-1" );
g2.drawBytes( lineBytes, 0, lineBytes.length, 0, 0 );
}
catch ( Exception e ) {
e.printStackTrace();
}
break;
case DRAW_GLYPHV:
GlyphVector gv =
testFont.createGlyphVector( g2.getFontRenderContext(), line );
g2.drawGlyphVector( gv, (float) 0, (float) 0 );
break;
case TL_DRAW:
TextLayout tl = new TextLayout( line, testFont,
g2.getFontRenderContext() );
tl.draw( g2, (float) 0, (float) 0 );
break;
case GV_OUTLINE:
GlyphVector gvo =
testFont.createGlyphVector( g2.getFontRenderContext(), line );
g2.draw( gvo.getOutline( (float) 0, (float) 0 ));
break;
case TL_OUTLINE:
TextLayout tlo =
new TextLayout( line, testFont,
g2.getFontRenderContext() );
AffineTransform at = new AffineTransform();
g2.draw( tlo.getOutline( at ));
}
/// ABP - restore old tform
g2.setTransform ( oldTx );
}
Example 17
| Source File: baseDrawerItem.java From brModelo with GNU General Public License v3.0 | 4 votes |
|
@Override
public void DoPaint(Graphics2D g) {
int l = left;
int t = top;
if (!outroPintor) {
if (getTipo() == tipoDrawer.tpMedida) {
l = dono.getL() + left;
t = dono.getT() + top;
} else {
l = dono.getL();
t = dono.getT();
}
}
if (!recivePaint) {
if (isGradiente()) {
g.setPaint(PaintGradiente(g, l, t));
} else {
g.setColor(getCor());
}
}
Shape dr = null;
boolean ok = false;
int[] pts;
switch (tipo) {
case tpElipse:
pts = ArrayDePontos(getElipse());
if (pts.length == 4) {
dr = new Ellipse2D.Double(pts[0], pts[1], pts[2], pts[3]);
}
break;
case tpRetangulo:
pts = ArrayDePontos(getRetangulo());
if (pts.length == 4) {
dr = new Rectangle2D.Double(pts[0], pts[1], pts[2], pts[3]);
}
if (pts.length == 6) {
dr = new RoundRectangle2D.Double(pts[0], pts[1], pts[2], pts[3], pts[4], pts[5]);
}
break;
case tpCurva:
pts = ArrayDePontos(getCurva());
if (pts.length == 8) {
dr = new CubicCurve2D.Double(pts[0], pts[1], pts[2], pts[3], pts[4], pts[5], pts[6], pts[7]);
}
if (pts.length == 6) {
dr = new QuadCurve2D.Double(pts[0], pts[1], pts[2], pts[3], pts[4], pts[5]);
}
break;
case tpArco:
// public final static int OPEN = 0;
// public final static int CHORD = 1;
// public final static int PIE = 2;
pts = ArrayDePontos(getArco());
if (pts.length == 7) {
dr = new Arc2D.Double(pts[0], pts[1], pts[2], pts[3], pts[4], pts[5], pts[6]);
}
break;
case tpImagem:
DrawImagem(g);
ok = true;
break;
case tpMedida:
//# Foi retirado do dezenho porque está feio (DrawerEditor).)
if (vertical == VERTICAL) {
medidaH(g, l, t);
} else {
medidaV(g, l, t);
}
ok = true;
break;
case tpPath:
DrawComplexPath(g, l, t);
ok = true;
break;
default:
g.drawLine(l, t, getWidth(), getHeight());
ok = true;
break;
}
if (dr == null || ok) {
if (dr == null && !ok) {
g.drawString("?", l + 5, t + 5);
}
return;
}
if (isFill()) {
g.fill(dr);
} else {
g.draw(dr);
}
}
Example 18
| Source File: MeterPlot.java From buffer_bci with GNU General Public License v3.0 | 4 votes |
|
/**
* Draws a tick on the dial.
*
* @param g2 the graphics device.
* @param meterArea the meter area.
* @param value the tick value.
* @param label a flag that controls whether or not a value label is drawn.
*/
protected void drawTick(Graphics2D g2, Rectangle2D meterArea,
double value, boolean label) {
double valueAngle = valueToAngle(value);
double meterMiddleX = meterArea.getCenterX();
double meterMiddleY = meterArea.getCenterY();
g2.setPaint(this.tickPaint);
g2.setStroke(new BasicStroke(2.0f));
double valueP2X;
double valueP2Y;
double radius = (meterArea.getWidth() / 2) + DEFAULT_BORDER_SIZE;
double radius1 = radius - 15;
double valueP1X = meterMiddleX
+ (radius * Math.cos(Math.PI * (valueAngle / 180)));
double valueP1Y = meterMiddleY
- (radius * Math.sin(Math.PI * (valueAngle / 180)));
valueP2X = meterMiddleX
+ (radius1 * Math.cos(Math.PI * (valueAngle / 180)));
valueP2Y = meterMiddleY
- (radius1 * Math.sin(Math.PI * (valueAngle / 180)));
Line2D.Double line = new Line2D.Double(valueP1X, valueP1Y, valueP2X,
valueP2Y);
g2.draw(line);
if (this.tickLabelsVisible && label) {
String tickLabel = this.tickLabelFormat.format(value);
g2.setFont(this.tickLabelFont);
g2.setPaint(this.tickLabelPaint);
FontMetrics fm = g2.getFontMetrics();
Rectangle2D tickLabelBounds
= TextUtilities.getTextBounds(tickLabel, g2, fm);
double x = valueP2X;
double y = valueP2Y;
if (valueAngle == 90 || valueAngle == 270) {
x = x - tickLabelBounds.getWidth() / 2;
}
else if (valueAngle < 90 || valueAngle > 270) {
x = x - tickLabelBounds.getWidth();
}
if ((valueAngle > 135 && valueAngle < 225)
|| valueAngle > 315 || valueAngle < 45) {
y = y - tickLabelBounds.getHeight() / 2;
}
else {
y = y + tickLabelBounds.getHeight() / 2;
}
g2.drawString(tickLabel, (float) x, (float) y);
}
}
Example 19
| Source File: WebUtil.java From smart-framework with Apache License 2.0 | 4 votes |
|
/**
* 创建验证码
*/
public static String createCaptcha(HttpServletResponse response) {
StringBuilder captcha = new StringBuilder();
try {
// 参数初始化
int width = 60; // 验证码图片的宽度
int height = 25; // 验证码图片的高度
int codeCount = 4; // 验证码字符个数
int codeX = width / (codeCount + 1); // 字符横向间距
int codeY = height - 4; // 字符纵向间距
int fontHeight = height - 2; // 字体高度
int randomSeed = 10; // 随机数种子
char[] codeSequence = { // 验证码中可出现的字符
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9'
};
// 创建图像
BufferedImage bi = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics2D g = bi.createGraphics();
// 将图像填充为白色
g.setColor(Color.WHITE);
g.fillRect(0, 0, width, height);
// 设置字体
g.setFont(new Font("Courier New", Font.BOLD, fontHeight));
// 绘制边框
g.setColor(Color.BLACK);
g.drawRect(0, 0, width - 1, height - 1);
// 产生随机干扰线（160条）
g.setColor(Color.WHITE);
// 创建随机数生成器
Random random = new Random();
for (int i = 0; i < 160; i++) {
int x = random.nextInt(width);
int y = random.nextInt(height);
int xl = random.nextInt(12);
int yl = random.nextInt(12);
g.drawLine(x, y, x + xl, y + yl);
}
// 生成随机验证码
int red, green, blue;
for (int i = 0; i < codeCount; i++) {
// 获取随机验证码
String validateCode = String.valueOf(codeSequence[random.nextInt(randomSeed)]);
// 随机构造颜色值
red = random.nextInt(255);
green = random.nextInt(255);
blue = random.nextInt(255);
// 将带有颜色的验证码绘制到图像中
g.setColor(new Color(red, green, blue));
g.drawString(validateCode, (i + 1) * codeX - 6, codeY);
// 将产生的随机数拼接起来
captcha.append(validateCode);
}
// 禁止图像缓存
response.setHeader("Cache-Control", "no-store");
response.setHeader("Pragma", "no-cache");
response.setDateHeader("Expires", 0);
// 设置响应类型为 JPEG 图片
response.setContentType("image/jpeg");
// 将缓冲图像写到 Servlet 输出流中
ServletOutputStream sos = response.getOutputStream();
ImageIO.write(bi, "jpeg", sos);
sos.close();
} catch (Exception e) {
logger.error("创建验证码出错！", e);
throw new RuntimeException(e);
}
return captcha.toString();
}
Example 20
| Source File: GraphicsUtils.java From RipplePower with Apache License 2.0 | 3 votes |
|
/**
* 绘制指定文字
*
* @param s
* @param graphics2D
* @param i
* @param j
* @param k
*/
public static void drawString(String message, Graphics2D graphics2D, int x, int y, int z) {
Font font = graphics2D.getFont();
int size = graphics2D.getFontMetrics(font).stringWidth(message);
GraphicsUtils.setAlpha(graphics2D, 0.9f);
graphics2D.drawString(message, x + (z - size) / 2, y);
GraphicsUtils.setAlpha(graphics2D, 1.0f);
}
