From 5ae70f548befc9445102ede05cd1c1f75e064761 Mon Sep 17 00:00:00 2001
From: liushaofeng <liushaofeng@bjjbkj.cn>
Date: Wed, 21 Oct 2020 09:20:42 +0800
Subject: [PATCH] youhua

---
 .../template/slider/DefaultSliderCaptchaTemplate.java        | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/main/java/cloud/tianai/captcha/template/slider/DefaultSliderCaptchaTemplate.java b/src/main/java/cloud/tianai/captcha/template/slider/DefaultSliderCaptchaTemplate.java
index 95c5392..c2e9b34 100644
--- a/src/main/java/cloud/tianai/captcha/template/slider/DefaultSliderCaptchaTemplate.java
+++ b/src/main/java/cloud/tianai/captcha/template/slider/DefaultSliderCaptchaTemplate.java
@@ -188,7 +188,7 @@ public class DefaultSliderCaptchaTemplate implements SliderCaptchaTemplate {
 
     @SneakyThrows
     public SliderCaptchaInfo getSlideImageInfo(String targetFormatName, String matrixFormatName) {
-        if (resourceImageFiles.isEmpty() ||  templateImageFiles.isEmpty()) {
+        if (resourceImageFiles.isEmpty() || templateImageFiles.isEmpty()) {
             log.warn("滑块验证码生成失败， 资源或模板为空，不能进行生成, 资源文件列表长度: {}, 模板文件列表长度: {}",
                     resourceImageFiles.size(), templateImageFiles.size());
             return null;
@@ -425,6 +425,9 @@ public class DefaultSliderCaptchaTemplate implements SliderCaptchaTemplate {
     }
 
     private URL getRandomResourceImage() {
+        if (resourceImageFiles.size() == 1) {
+            return resourceImageFiles.get(0);
+        }
         int targetNo = ThreadLocalRandom.current().nextInt(resourceImageFiles.size());
         return resourceImageFiles.get(targetNo);
     }