diff --git a/src/main/java/net/educoder/ecsonar/model/api/Person.java b/src/main/java/net/educoder/ecsonar/model/api/Person.java
index a8d831e..bc1a789 100644
--- a/src/main/java/net/educoder/ecsonar/model/api/Person.java
+++ b/src/main/java/net/educoder/ecsonar/model/api/Person.java
@@ -7,7 +7,7 @@ public class Person {
 
 
     public String getUid() {
-        return uid;
+        return uid.trim();
     }
 
     public void setUid(String uid) {
diff --git a/src/main/java/net/educoder/ecsonar/task/ReadExcelRunnable.java b/src/main/java/net/educoder/ecsonar/task/ReadExcelRunnable.java
index c5b9563..e350517 100644
--- a/src/main/java/net/educoder/ecsonar/task/ReadExcelRunnable.java
+++ b/src/main/java/net/educoder/ecsonar/task/ReadExcelRunnable.java
@@ -56,6 +56,7 @@ public class ReadExcelRunnable implements Runnable{
 //                e.printStackTrace();
 //            }
 //        }
+//        log.info("开始调用");
         String key = String.format("%d-%s", homeworkId, uid);
         File scannerReport = new File(path + "/.scannerwork/report-task.txt");
         if(scannerReport.exists()){
diff --git a/src/main/java/net/educoder/ecsonar/utils/RarUtil.java b/src/main/java/net/educoder/ecsonar/utils/RarUtil.java
index 46dd760..c95e561 100644
--- a/src/main/java/net/educoder/ecsonar/utils/RarUtil.java
+++ b/src/main/java/net/educoder/ecsonar/utils/RarUtil.java
@@ -9,6 +9,11 @@ import java.io.IOException;
 import java.nio.charset.Charset;
 import java.nio.file.*;
 import java.nio.file.attribute.BasicFileAttributes;
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Set;
 
 /**
  * @Author: youys
@@ -17,6 +22,14 @@ import java.nio.file.attribute.BasicFileAttributes;
  */
 public class RarUtil {
 
+    private static final Set<String> SOURCE_EXTENSIONS = new HashSet<>(Arrays.asList(
+            ".java", ".py", ".c", ".cc", ".cpp", ".cxx", ".h", ".hpp",
+            ".js", ".jsx", ".ts", ".tsx", ".vue", ".go", ".php", ".rb",
+            ".cs", ".m", ".mm", ".swift", ".kt", ".kts", ".scala"
+    ));
+
+    private static final double TARGET_EXTENSION_RATIO = 0.8;
+
     public static void unrar(String sourceFilePath, String outputDirectory) {
         String s = RuntimeUtil.execForStr("unar", sourceFilePath,"-o", outputDirectory);
         System.out.println("result====" + s);
@@ -34,16 +47,17 @@ public class RarUtil {
 //        un7Z("/tmp/20230301/201905962241/20230519153506_i39sv5p2.7z", "/Users/youyongsheng/Desktop/aa");
 
 
-        String path = "/tmp/202605112";
 //        unzip();
+        String path = "/tmp/202605112";
 //            valid(path);
+//        printSingleExtensionCodeDirs(path);
 //        removeFullCode(path);
         removeDirectory(Paths.get(path));
     }
 
 
     public static void unzip(){
-        String sourceDir = "/tmp/202605111";
+        String sourceDir = "/tmp/2026051111";
         String targetDir = "/tmp/202605112";
 
         File directory = new File(sourceDir);
@@ -126,6 +140,78 @@ public class RarUtil {
 
     }
 
+    public static void printSingleExtensionCodeDirs(String path) {
+        File directory = new File(path);
+        File[] studentDirs = directory.listFiles();
+        if (studentDirs == null) {
+            System.out.println("No student directories found.");
+            return;
+        }
+
+        for (File studentDir : studentDirs) {
+            if (!studentDir.isDirectory()) {
+                continue;
+            }
+
+            try {
+                ExtensionScanResult result = scanSingleExtensionCodeDir(studentDir.toPath());
+                if (result.isMatched()) {
+                    System.out.println(studentDir.getName()
+                            + " -> 主要是 " + result.getExtension()
+                            + " 文件, count:" + result.getTargetFileCount()
+                            + "/" + result.getSourceFileCount()
+                            + ", ratio:" + String.format("%.2f", result.getTargetRatio() * 100) + "%"
+                            + ", path:" + studentDir.getAbsolutePath());
+                }
+            } catch (IOException e) {
+                System.out.println(studentDir.getName() + " -> 检测失败: " + e.getMessage());
+            }
+        }
+    }
+
+    private static ExtensionScanResult scanSingleExtensionCodeDir(Path rootPath) throws IOException {
+        ExtensionScanResult result = new ExtensionScanResult();
+        Files.walkFileTree(rootPath, new SimpleFileVisitor<Path>() {
+            @Override
+            public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) {
+                if (!attrs.isRegularFile()) {
+                    return FileVisitResult.CONTINUE;
+                }
+
+                String fileName = file.getFileName().toString();
+                if (shouldIgnoreWhenDetectingCodeExtension(fileName)) {
+                    return FileVisitResult.CONTINUE;
+                }
+
+                String extension = getExtension(fileName);
+                if (!SOURCE_EXTENSIONS.contains(extension)) {
+                    return FileVisitResult.CONTINUE;
+                }
+                result.addExtension(extension);
+                return FileVisitResult.CONTINUE;
+            }
+        });
+
+        result.finish(TARGET_EXTENSION_RATIO);
+        return result;
+    }
+
+    private static boolean isTargetCodeExtension(String extension) {
+        return ".cs".equals(extension) || ".m".equals(extension);
+    }
+
+    private static boolean shouldIgnoreWhenDetectingCodeExtension(String fileName) {
+        return fileName.startsWith(".") || fileName.toLowerCase().endsWith(".meta");
+    }
+
+    private static String getExtension(String fileName) {
+        int index = fileName.lastIndexOf(".");
+        if (index < 0 || index == fileName.length() - 1) {
+            return "";
+        }
+        return fileName.substring(index).toLowerCase();
+    }
+
     public static void removeFullCode(String path){
         // 删除完整代码
         File directory = new File(path);
@@ -200,4 +286,56 @@ public class RarUtil {
             }
         });
     }
+
+    private static class ExtensionScanResult {
+        private boolean matched;
+        private String extension;
+        private int sourceFileCount;
+        private int targetFileCount;
+        private double targetRatio;
+        private final Map<String, Integer> extensionCountMap = new HashMap<>();
+
+        public void addExtension(String extension) {
+            sourceFileCount++;
+            extensionCountMap.put(extension, extensionCountMap.getOrDefault(extension, 0) + 1);
+        }
+
+        public void finish(double targetExtensionRatio) {
+            for (String targetExtension : Arrays.asList(".cs", ".m", ".ets")) {
+                int count = extensionCountMap.getOrDefault(targetExtension, 0);
+                double ratio = sourceFileCount == 0 ? 0 : count * 1.0 / sourceFileCount;
+                if (count > targetFileCount) {
+                    extension = targetExtension;
+                    targetFileCount = count;
+                    targetRatio = ratio;
+                }
+            }
+            matched = sourceFileCount > 0 && targetFileCount > 0 && targetRatio >= targetExtensionRatio;
+        }
+
+        public boolean isMatched() {
+            return matched;
+        }
+
+        public void setMatched(boolean matched) {
+            this.matched = matched;
+        }
+
+        public String getExtension() {
+            return extension;
+        }
+
+        public int getSourceFileCount() {
+            return sourceFileCount;
+        }
+
+        public int getTargetFileCount() {
+            return targetFileCount;
+        }
+
+        public double getTargetRatio() {
+            return targetRatio;
+        }
+
+    }
 }
diff --git a/src/test/java/net/educoder/ecsonar/EcsonarApplicationTests.java b/src/test/java/net/educoder/ecsonar/EcsonarApplicationTests.java
index 2bc8547..593ece9 100644
--- a/src/test/java/net/educoder/ecsonar/EcsonarApplicationTests.java
+++ b/src/test/java/net/educoder/ecsonar/EcsonarApplicationTests.java
@@ -100,7 +100,7 @@ public class EcsonarApplicationTests {
             Metrics metrics = reportService.getMetrics(projectName);
 
             String templatePath = this.getClass().getClassLoader().getResource("template1.xlsx").getPath();
-            String outPath = "/Users/youyongsheng/Desktop/bbbb2.xlsx";
+            String outPath = "/Users/youyongsheng/Desktop/cccc.xlsx";
 
             System.out.println("第"+(i++)+"个学生," + uid);
             if (CollectionUtils.isEmpty(collect.get(uid))) {