From fa79eee1ce741ab0aa1c3a8bf577b6d9d42c0cb1 Mon Sep 17 00:00:00 2001
From: Looly <loolly@aliyun.com>
Date: Wed, 14 Jan 2026 11:51:56 +0800
Subject: [PATCH] =?UTF-8?q?`AbstractCaptcha`=E5=A2=9E=E5=8A=A0`setStroke`?=
 =?UTF-8?q?=E6=96=B9=E6=B3=95=E6=94=AF=E6=8C=81=E7=BA=BF=E6=9D=A1=E7=B2=97?=
 =?UTF-8?q?=E7=BB=86=EF=BC=88issue#IDJQ15@Gitee=EF=BC=89?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 CHANGELOG.md                                      |  1 +
 .../java/cn/hutool/captcha/AbstractCaptcha.java   | 15 +++++++++++----
 .../java/cn/hutool/captcha/CircleCaptcha.java     |  5 +++++
 .../main/java/cn/hutool/captcha/LineCaptcha.java  |  5 +++++
 .../main/java/cn/hutool/captcha/ShearCaptcha.java |  1 -
 5 files changed, 22 insertions(+), 5 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 392ebecbea..b4d61f7d6c 100755
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,7 @@
 # 5.8.44(2026-01-12)
 ### 🐣新特性
 * 【core   】      `NumberUtil.parseNumber`增加支持科学计数法（pr#4211@Github）
+* 【captcha】      `AbstractCaptcha`增加`setStroke`方法支持线条粗细（issue#IDJQ15@Gitee）
 
 ### 🐞Bug修复
 * 【json       】  修复`JSONUtil.wrap`忽略错误问题（issue#4210@Github）
diff --git a/hutool-captcha/src/main/java/cn/hutool/captcha/AbstractCaptcha.java b/hutool-captcha/src/main/java/cn/hutool/captcha/AbstractCaptcha.java
index adb48c32ec..4790d8dc3a 100755
--- a/hutool-captcha/src/main/java/cn/hutool/captcha/AbstractCaptcha.java
+++ b/hutool-captcha/src/main/java/cn/hutool/captcha/AbstractCaptcha.java
@@ -9,10 +9,7 @@ import cn.hutool.core.io.IORuntimeException;
 import cn.hutool.core.io.IoUtil;
 import cn.hutool.core.util.URLUtil;
 
-import java.awt.AlphaComposite;
-import java.awt.Color;
-import java.awt.Font;
-import java.awt.Image;
+import java.awt.*;
 import java.awt.image.BufferedImage;
 import java.io.ByteArrayOutputStream;
 import java.io.File;
@@ -65,6 +62,7 @@ public abstract class AbstractCaptcha implements ICaptcha {
 	 * 文字透明度
 	 */
 	protected AlphaComposite textAlpha;
+	protected Stroke stroke;
 
 	/**
 	 * 构造，使用随机验证码生成器生成验证码
@@ -271,4 +269,13 @@ public abstract class AbstractCaptcha implements ICaptcha {
 		this.textAlpha = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, textAlpha);
 	}
 
+	/**
+	 * 设置画笔线条特征，如线条宽度等
+	 *
+	 * @param stroke 画笔
+	 * @since 5.8.44
+	 */
+	public void setStroke(Stroke stroke) {
+		this.stroke = stroke;
+	}
 }
diff --git a/hutool-captcha/src/main/java/cn/hutool/captcha/CircleCaptcha.java b/hutool-captcha/src/main/java/cn/hutool/captcha/CircleCaptcha.java
index f528cf359e..71ec724512 100755
--- a/hutool-captcha/src/main/java/cn/hutool/captcha/CircleCaptcha.java
+++ b/hutool-captcha/src/main/java/cn/hutool/captcha/CircleCaptcha.java
@@ -118,6 +118,11 @@ public class CircleCaptcha extends AbstractCaptcha {
 	 * @param g {@link Graphics2D}
 	 */
 	private void drawInterfere(Graphics2D g) {
+		// issue#IDJQ15 自定义线条特征（粗细等）
+		if(null != this.stroke){
+			g.setStroke(this.stroke);
+		}
+
 		final ThreadLocalRandom random = RandomUtil.getRandom();
 
 		for (int i = 0; i < this.interfereCount; i++) {
diff --git a/hutool-captcha/src/main/java/cn/hutool/captcha/LineCaptcha.java b/hutool-captcha/src/main/java/cn/hutool/captcha/LineCaptcha.java
index a4d556da42..f5d8e37c1f 100755
--- a/hutool-captcha/src/main/java/cn/hutool/captcha/LineCaptcha.java
+++ b/hutool-captcha/src/main/java/cn/hutool/captcha/LineCaptcha.java
@@ -110,6 +110,11 @@ public class LineCaptcha extends AbstractCaptcha {
 	 * @param g {@link Graphics2D}画笔
 	 */
 	private void drawInterfere(Graphics2D g) {
+		// issue#IDJQ15 自定义线条特征（粗细等）
+		if(null != this.stroke){
+			g.setStroke(this.stroke);
+		}
+
 		final ThreadLocalRandom random = RandomUtil.getRandom();
 		// 干扰线
 		for (int i = 0; i < this.interfereCount; i++) {
diff --git a/hutool-captcha/src/main/java/cn/hutool/captcha/ShearCaptcha.java b/hutool-captcha/src/main/java/cn/hutool/captcha/ShearCaptcha.java
index f0c2a14824..6703983582 100755
--- a/hutool-captcha/src/main/java/cn/hutool/captcha/ShearCaptcha.java
+++ b/hutool-captcha/src/main/java/cn/hutool/captcha/ShearCaptcha.java
@@ -193,7 +193,6 @@ public class ShearCaptcha extends AbstractCaptcha {
 	 */
 	@SuppressWarnings("SameParameterValue")
 	private void drawInterfere(Graphics g, int x1, int y1, int x2, int y2, int thickness, Color c) {
-
 		// The thick line is in fact a filled polygon
 		g.setColor(c);
 		int dX = x2 - x1;