From a74bd10f029b6a19fd4227460e789a5ae29b9c6c Mon Sep 17 00:00:00 2001
From: dlaren <dla.ren@outlook.com>
Date: Wed, 20 Aug 2025 22:16:38 +0800
Subject: [PATCH] =?UTF-8?q?=E3=80=90=E6=96=B0=E5=A2=9E=E3=80=91=20?=
 =?UTF-8?q?=E8=AF=BB=E5=8F=96C=E8=AF=AD=E8=A8=80=E6=96=87=E4=BB=B6?=
 =?UTF-8?q?=E4=B9=B1=E7=A0=81=E9=97=AE=E9=A2=98?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 exam-module-exam/exam-module-exam-biz/pom.xml |  7 +++++
 .../question/ExamQuestionController.java      |  7 ++++-
 .../exam/utils/charset/CharsetUtils.java      | 30 +++++++++++++++++++
 3 files changed, 43 insertions(+), 1 deletion(-)
 create mode 100644 exam-module-exam/exam-module-exam-biz/src/main/java/pc/exam/pp/module/exam/utils/charset/CharsetUtils.java

diff --git a/exam-module-exam/exam-module-exam-biz/pom.xml b/exam-module-exam/exam-module-exam-biz/pom.xml
index 06bc530f..04f83b88 100644
--- a/exam-module-exam/exam-module-exam-biz/pom.xml
+++ b/exam-module-exam/exam-module-exam-biz/pom.xml
@@ -86,6 +86,13 @@
             <scope>test</scope>
         </dependency>
 
+        <dependency>
+            <groupId>com.googlecode.juniversalchardet</groupId>
+            <artifactId>juniversalchardet</artifactId>
+            <version>1.0.3</version>
+        </dependency>
+
+
         <!-- 工具类相关 -->
 
         <dependency>
diff --git a/exam-module-exam/exam-module-exam-biz/src/main/java/pc/exam/pp/module/exam/controller/admin/question/ExamQuestionController.java b/exam-module-exam/exam-module-exam-biz/src/main/java/pc/exam/pp/module/exam/controller/admin/question/ExamQuestionController.java
index 9091b853..15bc1402 100644
--- a/exam-module-exam/exam-module-exam-biz/src/main/java/pc/exam/pp/module/exam/controller/admin/question/ExamQuestionController.java
+++ b/exam-module-exam/exam-module-exam-biz/src/main/java/pc/exam/pp/module/exam/controller/admin/question/ExamQuestionController.java
@@ -29,6 +29,7 @@ import pc.exam.pp.module.exam.controller.admin.questionexamine.vo.QuestionExamin
 import pc.exam.pp.module.exam.dal.dataobject.EducationPaperTask;
 import pc.exam.pp.module.exam.dal.dataobject.ExamQuestion;
 import pc.exam.pp.module.exam.service.question.IExamQuestionService;
+import pc.exam.pp.module.exam.utils.charset.CharsetUtils;
 import pc.exam.pp.module.system.enums.common.SexEnum;
 
 import java.io.IOException;
@@ -295,7 +296,11 @@ public class ExamQuestionController {
         if (!file.getFile().getOriginalFilename().endsWith(".c")) {
             return CommonResult.error(100810, "请上传.c文件");
         }
-        return CommonResult.success(new String(file.getFile().getBytes(), "GBK"));
+
+        byte[] bytes = file.getFile().getBytes();
+        String content = CharsetUtils.detectAndRead(bytes);
+
+        return CommonResult.success(content);
     }
 
 }
diff --git a/exam-module-exam/exam-module-exam-biz/src/main/java/pc/exam/pp/module/exam/utils/charset/CharsetUtils.java b/exam-module-exam/exam-module-exam-biz/src/main/java/pc/exam/pp/module/exam/utils/charset/CharsetUtils.java
new file mode 100644
index 00000000..4b3f4517
--- /dev/null
+++ b/exam-module-exam/exam-module-exam-biz/src/main/java/pc/exam/pp/module/exam/utils/charset/CharsetUtils.java
@@ -0,0 +1,30 @@
+package pc.exam.pp.module.exam.utils.charset;
+
+import org.mozilla.universalchardet.UniversalDetector;
+
+import java.io.IOException;
+import java.nio.charset.Charset;
+
+public class CharsetUtils {
+
+    /**
+     * 自动识别文件编码，并返回字符串内容
+     * @param bytes 文件字节数组
+     * @return 文件内容
+     */
+    public static String detectAndRead(byte[] bytes) throws IOException {
+        // 1. 检测编码
+        UniversalDetector detector = new UniversalDetector(null);
+        detector.handleData(bytes, 0, bytes.length);
+        detector.dataEnd();
+        String detectedCharset = detector.getDetectedCharset();
+
+        // 2. 默认回退 UTF-8
+        if (detectedCharset == null) {
+            detectedCharset = "UTF-8";
+        }
+
+        // 3. 转换为字符串
+        return new String(bytes, Charset.forName(detectedCharset));
+    }
+}