org.ncq.captcha.utils

类 GraphicsUtil

java.lang.Object

org.ncq.captcha.utils.GraphicsUtil

public class GraphicsUtil
extends java.lang.Object

构造器概要

构造器

构造器和说明
GraphicsUtil()

方法概要

限定符和类型	方法和说明
static java.awt.Graphics2D	createGraphics(java.awt.image.BufferedImage bufferedImage, java.awt.Color backgroundColor) 创建绘笔公爵
static java.awt.Graphics	drawStr(java.awt.Graphics graphics, java.lang.String str, java.awt.Font font, java.awt.Color color, int width, int height, java.awt.Color backgroundColor) 图片绘制指定字符串
static int	getCenterYHeight(java.awt.Graphics graphics, int backgroundImageHeight) 获取内容居中高度的Y轴坐标
static void	setAlphaComposite(java.awt.Graphics2D graphics2D, java.awt.AlphaComposite alphaComposite)

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

GraphicsUtil

public GraphicsUtil()

方法详细资料

createGraphics

public static java.awt.Graphics2D createGraphics(java.awt.image.BufferedImage bufferedImage,
                                                 java.awt.Color backgroundColor)

创建绘笔公爵

参数:

bufferedImage - 图片buffer

backgroundColor - 背景颜色

返回:

Graphics2D

drawStr

public static java.awt.Graphics drawStr(java.awt.Graphics graphics,
                                        java.lang.String str,
                                        java.awt.Font font,
                                        java.awt.Color color,
                                        int width,
                                        int height,
                                        java.awt.Color backgroundColor)

图片绘制指定字符串

参数:

graphics - 绘笔对象

str - 需要绘制的字符串

font - 字体

color - 字体颜色，颜色可以为空，为空每个字符的颜色进行随机

width - 图片的宽度

height - 图片的高度

backgroundColor - 图片背景颜色

返回:

Graphics

getCenterYHeight

public static int getCenterYHeight(java.awt.Graphics graphics,
                                   int backgroundImageHeight)

获取内容居中高度的Y轴坐标

参数:

graphics - 绘笔对象

backgroundImageHeight - 图片的高度

返回:

居中高度坐标

setAlphaComposite

public static void setAlphaComposite(java.awt.Graphics2D graphics2D,
                                     java.awt.AlphaComposite alphaComposite)