Use platform-neutral path composition

src/main/java/com/example/workutils/biz/apidoc/ApiDocWindow.java

@@ -515,7 +515,7 @@ public class ApiDocWindow {
             Path projDir = Paths.get(projPath);
             if (!Files.isDirectory(projDir)) continue;
             List<Path> srcBases = new ArrayList<>();
-            Path selfSrc = projDir.resolve("src/main/java");
+            Path selfSrc = projDir.resolve(Path.of("src", "main", "java"));
             if (Files.isDirectory(selfSrc)) srcBases.add(selfSrc);
             try (Stream<Path> children = Files.list(projDir)) {
                 children.filter(Files::isDirectory)
@@ -579,7 +579,7 @@ public class ApiDocWindow {
         for (String projPath : selectedPaths) {
             Path projDir = Paths.get(projPath);
             if (!Files.isDirectory(projDir)) continue;
-            Path selfSrc = projDir.resolve("src/main/java");
+            Path selfSrc = projDir.resolve(Path.of("src", "main", "java"));
             String key = selfSrc.toString().replace('\\', '/');
             if (Files.isDirectory(selfSrc) && seenSrcBases.add(key)) {
                 modules.add(new ModuleInfo(projDir.getFileName().toString(), projPath, selfSrc));
@@ -905,7 +905,7 @@ public class ApiDocWindow {
 
     private void collectSrcBases(Path dir, List<Path> srcBases) {
         if (!Files.isDirectory(dir)) return;
-        Path sb = dir.resolve("src/main/java");
+        Path sb = dir.resolve(Path.of("src", "main", "java"));
         if (Files.isDirectory(sb)) srcBases.add(sb);
         try (Stream<Path> children = Files.list(dir)) {
             children.filter(Files::isDirectory).filter(d -> !d.getFileName().toString().startsWith("."))
@@ -932,7 +932,7 @@ public class ApiDocWindow {
 
     private void collectModules(Path dir, List<ModuleInfo> modules, Set<String> seen) {
         if (!Files.isDirectory(dir)) return;
-        Path sb = dir.resolve("src/main/java");
+        Path sb = dir.resolve(Path.of("src", "main", "java"));
         String key = sb.toString().replace('\\', '/');
         if (Files.isDirectory(sb) && seen.add(key)) {
             modules.add(new ModuleInfo(dir.getFileName().toString(),

src/main/java/com/example/workutils/biz/apidoc/parser/JavaSourceParser.java

@@ -81,7 +81,7 @@ public class JavaSourceParser {
      * 扫描项目目录下所有 .java 文件（自动追加 src/main/java）
      */
     public List<Path> findJavaFiles(Path projectPath) {
-        Path javaSrc = projectPath.resolve("src/main/java");
+        Path javaSrc = projectPath.resolve(Path.of("src", "main", "java"));
         if (!Files.isDirectory(javaSrc)) {
             log.debug("项目 {} 没有 src/main/java 目录", projectPath);
             return new ArrayList<>();

src/main/java/com/example/workutils/biz/mybatisgenerator/application/OutputLayoutPolicy.java

@@ -10,9 +10,9 @@ public final class OutputLayoutPolicy {
         Path root = requireProjectRoot(projectRoot);
         return new OutputLayout(
                 root,
-                root.resolve("src/main/java"),
-                root.resolve("src/main/resources"),
-                root.resolve("src/main/java"));
+                root.resolve(Path.of("src", "main", "java")),
+                root.resolve(Path.of("src", "main", "resources")),
+                root.resolve(Path.of("src", "main", "java")));
     }
 
     public OutputLayout custom(

src/main/java/com/example/workutils/system/support/FileOperationHelper.java

@@ -71,7 +71,8 @@ public class FileOperationHelper {
     public String generateFileName(String baseDirectory, String prefix, String extension) {
         String timestamp = java.time.LocalDateTime.now()
                 .format(java.time.format.DateTimeFormatter.ofPattern("yyyy-MM-dd-HH-mm-ss"));
-        return String.format("%s/%s_%s.%s", baseDirectory, prefix, timestamp, extension);
+        String fileName = String.format("%s_%s.%s", prefix, timestamp, extension);
+        return Paths.get(baseDirectory).resolve(fileName).toString();
     }
 
     public String generateFileName(String prefix, String extension) {

src/test/java/com/example/workutils/biz/mybatisgenerator/application/OutputLayoutPolicyTest.java

@@ -21,9 +21,9 @@ class OutputLayoutPolicyTest {
 
         Path root = tempDir.toAbsolutePath().normalize();
         assertEquals(root, layout.projectRoot());
-        assertEquals(root.resolve("src/main/java"), layout.modelDirectory());
-        assertEquals(root.resolve("src/main/resources"), layout.xmlDirectory());
-        assertEquals(root.resolve("src/main/java"), layout.mapperDirectory());
+        assertEquals(root.resolve(Path.of("src", "main", "java")), layout.modelDirectory());
+        assertEquals(root.resolve(Path.of("src", "main", "resources")), layout.xmlDirectory());
+        assertEquals(root.resolve(Path.of("src", "main", "java")), layout.mapperDirectory());
     }
 
     @Test

src/test/java/com/example/workutils/system/support/FileOperationHelperPathTest.java

@@ -0,0 +1,31 @@
+package com.example.workutils.system.support;
+
+import org.junit.jupiter.api.Test;
+
+import java.nio.file.Path;
+
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+class FileOperationHelperPathTest {
+
+    @Test
+    void emptyBaseDirectoryProducesRelativeFileName() {
+        String generated = new FileOperationHelper().generateFileName("", "报告", "html");
+        Path path = Path.of(generated);
+
+        assertFalse(path.isAbsolute());
+        assertNull(path.getRoot());
+        assertTrue(path.getFileName().toString().matches("报告_\\d{4}-\\d{2}-\\d{2}-\\d{2}-\\d{2}-\\d{2}\\.html"));
+    }
+
+    @Test
+    void baseDirectoryWithSpacesAndChineseIsPreserved() {
+        Path base = Path.of("build", "输出 空间");
+        Path generated = Path.of(new FileOperationHelper()
+                .generateFileName(base.toString(), "报告", "html"));
+
+        assertTrue(generated.startsWith(base));
+    }
+}