feat: 完成二阶段的优化处理

src/main/java/com/codechecker/cache/analyze/FileScanner.java

@@ -31,22 +31,24 @@ public class FileScanner {
     public Map<String, String> scan() {
         Map<String, String> result = new LinkedHashMap<>();
         try (Stream<Path> stream = Files.walk(repoRoot)) {
-            stream.filter(Files::isRegularFile)
+            List<Path> javaFiles = stream
+                    .filter(Files::isRegularFile)
                     .filter(p -> p.toString().endsWith(".java"))
-                    .forEach(p -> {
+                    .filter(p -> {
                         String rel = repoRoot.relativize(p).toString().replace('\\', '/');
-                        if (!rel.contains("/src/main/java/")) {
-                            return;
-                        }
-                        if (!moduleAllowed(rel)) {
-                            return;
-                        }
-                        try {
-                            result.put(rel, new String(Files.readAllBytes(p), StandardCharsets.UTF_8));
-                        } catch (IOException e) {
-                            throw new UncheckedIOException(e);
-                        }
-                    });
+                        return rel.contains("/src/main/java/") && moduleAllowed(rel);
+                    })
+                    .collect(java.util.stream.Collectors.toList());
+            javaFiles.parallelStream().forEach(p -> {
+                String rel = repoRoot.relativize(p).toString().replace('\\', '/');
+                try {
+                    synchronized (result) {
+                        result.put(rel, new String(Files.readAllBytes(p), StandardCharsets.UTF_8));
+                    }
+                } catch (IOException e) {
+                    throw new UncheckedIOException(e);
+                }
+            });
         } catch (IOException e) {
             throw new UncheckedIOException(e);
         }