【修改】 C语言因为电脑编码读取不到文件内容

src/main/java/com/example/exam/exam/controller/auto/AutoController.java

@@ -73,7 +73,7 @@ public class AutoController {
      * @return 判分结果
      */
     @PostMapping("/judgementForC")
-    public Result<BigDecimal> judgementForC(@RequestBody StuInfoVo stuInfoVo){
+    public Result<BigDecimal> judgementForC(@RequestBody StuInfoVo stuInfoVo) throws IOException {
         return Result.success(autoService.autoForC(stuInfoVo));
     }
     // WPS-WORD

src/main/java/com/example/exam/exam/service/autoforc/AutoForCService.java

@@ -2,6 +2,7 @@ package com.example.exam.exam.service.autoforc;
 
 import com.example.exam.exam.controller.auto.vo.StuInfoVo;
 
+import java.io.IOException;
 import java.math.BigDecimal;
 
 /**
@@ -13,5 +14,5 @@ public interface AutoForCService {
      * 自动判题 C语言
      * @param stuInfoVo 学生信息
      */
-    BigDecimal autoForC(StuInfoVo stuInfoVo);
+    BigDecimal autoForC(StuInfoVo stuInfoVo) throws IOException;
 }

src/main/java/com/example/exam/exam/service/autoforc/AutoForCServiceImpl.java

@@ -12,6 +12,7 @@ import jakarta.annotation.Resource;
 import org.springframework.stereotype.Service;
 
 import java.io.File;
+import java.io.IOException;
 import java.math.BigDecimal;
 import java.util.List;
 import java.util.Optional;
@@ -37,7 +38,7 @@ public class AutoForCServiceImpl implements AutoForCService {
      * @return 是否通过
      */
     @Override
-    public BigDecimal autoForC(StuInfoVo stuInfoVo) {
+    public BigDecimal autoForC(StuInfoVo stuInfoVo) throws IOException {
         SystemTenant systemTenant = systemTenantService.getId(stuInfoVo.getSchoolName());
         BigDecimal score = new BigDecimal(0);
         // 0、获取到试卷信息（试卷详情）
@@ -67,10 +68,11 @@ public class AutoForCServiceImpl implements AutoForCService {
                             EducationPaperQu educationPaperQu = results.get();
                             String quScore = educationPaperScheme.getQuScores();
                             ExamQuestion examQuestion = examQuestionService.selectExamQuestionByQuId(quId);
-                            System.out.println(wjFile);
                             File[] lastFiles = wjFile.listFiles();
                             for (File lastFile : lastFiles) {
+                                System.out.println(lastFile);
                                 if (lastFile.getName().contains(".c")) {
+                                    System.out.println("开始C语言判分"+quNumber);
                                     String judgementStr = "<p>-----------------------------------------------------------</p>";
                                     judgementStr += "<p>试题序号：" + educationPaperQu.getSort() + "</p>";
                                     judgementStr += "<p>试题编号：" + examQuestion.getQuNum() + "</p>";

src/main/java/com/example/exam/exam/service/c/JudgementService.java

@@ -4,6 +4,8 @@ package com.example.exam.exam.service.c;
 import com.example.exam.exam.dal.ExamQuestion;
 import com.example.exam.exam.dal.SourceAndText;
 
+import java.io.IOException;
+
 /**
  * 判分逻辑集合
  *
@@ -19,7 +21,7 @@ public interface JudgementService {
      * @param score 分数
      * @return 返回判分
      */
-    public SourceAndText ProgrammingC(double score, String pathC, String fileName, ExamQuestion examQuestion, String judgementStr);
+    public SourceAndText ProgrammingC(double score, String pathC, String fileName, ExamQuestion examQuestion, String judgementStr) throws IOException;
 
 
 }

src/main/java/com/example/exam/exam/service/c/JudgementServiceImpl.java

@@ -9,6 +9,7 @@ import com.example.exam.exam.utils.c.LogFileUtils;
 import org.springframework.stereotype.Service;
 import com.example.exam.exam.dal.SourceAndText;
 
+import java.io.IOException;
 import java.util.*;
 
 /**
@@ -28,7 +29,7 @@ public class JudgementServiceImpl implements JudgementService
      * @return 返回判分
      */
     @Override
-    public SourceAndText ProgrammingC(double score, String pathC, String fileName, ExamQuestion examQuestion, String judgementStr) {
+    public SourceAndText ProgrammingC(double score, String pathC, String fileName, ExamQuestion examQuestion, String judgementStr) throws IOException {
         SourceAndText sourceAndText = new SourceAndText();
         // 关键字比对，超过权重-测试用例/运行（测试用例全对，直接满分-不全对）-结果，不超过权重只给关键字几个的分
         // 获取该题有多少分
@@ -66,6 +67,7 @@ public class JudgementServiceImpl implements JudgementService
 
         // 创建log文件txt，用于记录
 //        LogFileUtils.createFile(pathC + "/log.txt");
+        System.out.println(pathC + " --- " + fileName);
         String code = JudgementCUtils.readFile(pathC, fileName);
 //        LogFileUtils.writeLine("✅ 系统开始读取学生考试文件：" + code);
         judgementStr = HtmlAppender.appendHtmlLine(judgementStr, "✅ 系统开始读取学生考试文件：" + code);

src/main/java/com/example/exam/exam/utils/c/JudgementCUtils.java

@@ -2,7 +2,10 @@ package com.example.exam.exam.utils.c;
 
 import javax.swing.*;
 import java.io.*;
+import java.nio.charset.Charset;
+import java.nio.charset.MalformedInputException;
 import java.nio.charset.StandardCharsets;
+import java.nio.charset.UnmappableCharacterException;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
@@ -190,35 +193,53 @@ public class JudgementCUtils
      * @param filePath 文件路径
      * @return 文件内容
      */
-    public static String readFile(String filePath, String fileName) {
+    public static String readFile(String filePath, String fileName) throws IOException {
-        // 创建一个 Path 对象，指向包含 C 语言文件的文件夹
+        Path folderPath = Paths.get(filePath).normalize().toAbsolutePath();
-        Path folderPath = Paths.get(filePath);
 
-        // 判断路径是否存在
         if (!Files.exists(folderPath)) {
-            return null; // 或者 return null，或者 throw new RuntimeException(...)，看你的函数定义
+            throw new FileNotFoundException("路径不存在: " + folderPath);
         }
 
-        // 使用 StringBuilder 来累积所有读取到的代码内容
         StringBuilder codeBuilder = new StringBuilder();
+        final boolean[] fileFound = {false};
 
         try (Stream<Path> paths = Files.walk(folderPath)) {
             paths.filter(Files::isRegularFile)
-                    .filter(path -> path.getFileName().toString().equalsIgnoreCase(fileName))
+                    .filter(path -> path.getFileName().toString().equals(fileName)) // 精确匹配
                     .forEach(path -> {
+                        fileFound[0] = true;
                         try {
-                            List<String> lines = Files.readAllLines(path, StandardCharsets.UTF_8);
+                            Charset charset = detectCharset(path);
-                            for (String line : lines) {
+                            List<String> lines = Files.readAllLines(path, charset);
-                                codeBuilder.append("\n").append(line);
+                            lines.forEach(line -> {
+                                codeBuilder.append(line).append("\n");
                                 System.out.println("    " + line);
-                            }
+                            });
                         } catch (IOException e) {
-//                            LogFileUtils.writeLine("❗ 无法读取文件: " + path);
+                            throw new UncheckedIOException("无法读取文件: " + path, e);
                         }
                     });
-        } catch (IOException e) {
-            return null;
         }
+
+        if (!fileFound[0]) {
+            throw new FileNotFoundException("未找到文件: " + fileName + " 在路径: " + folderPath);
+        }
+
         return codeBuilder.toString();
     }
+    private static Charset detectCharset(Path path) throws IOException {
+        // 常见中文编码列表
+        Charset[] candidates = {StandardCharsets.UTF_8, Charset.forName("GBK"),
+                StandardCharsets.ISO_8859_1, StandardCharsets.UTF_16};
+
+        for (Charset charset : candidates) {
+            try (BufferedReader reader = Files.newBufferedReader(path, charset)) {
+                reader.read();
+                return charset; // 如果能正常读取第一个字符，可能是正确编码
+            } catch (MalformedInputException | UnmappableCharacterException e) {
+                // 尝试下一个编码
+            }
+        }
+        return StandardCharsets.UTF_8; // 默认回退
+    }
 }