diff --git a/psa/src/files.rs b/psa/src/files.rs
index 8407df1a..57495f32 100644
--- a/psa/src/files.rs
+++ b/psa/src/files.rs
@@ -18,10 +18,11 @@ pub fn list_file_names<P: AsRef<Path>>(path: P) -> Vec<String> {
     files
 }
 
-pub fn list_dirs<P: AsRef<Path>>(path: P) -> Vec<String> {
+pub fn list_sub_dirs<P: AsRef<Path>>(path: P) -> Vec<String> {
     let mut dirs = Vec::new();
     let walk_dir = WalkDir::new(path);
     for dir_entry in walk_dir
+        .min_depth(1)
         .max_depth(1)
         .sort_by(|a, b| a.file_name().cmp(b.file_name()))
         .into_iter()
diff --git a/psa/src/jvm/maven_module.rs b/psa/src/jvm/maven_module.rs
index 011d4e92..12839898 100644
--- a/psa/src/jvm/maven_module.rs
+++ b/psa/src/jvm/maven_module.rs
@@ -1,18 +1,34 @@
 use std::path::Path;
 
-use crate::files::list_file_names;
+use crate::files::{list_file_names, list_sub_dirs};
 use crate::jvm::psa_jvm::ModuleAnalyzer;
 use crate::{Module, Project};
 
 pub struct MavenModuleAnalyzer {}
 
+impl MavenModuleAnalyzer {
+    fn analysis_sub_modules(&self, module_path: &str) -> Vec<Module> {
+        let mut sub_modules = Vec::new();
+        let sub_dirs = list_sub_dirs(Path::new(module_path));
+        for each_sub_dir in sub_dirs.iter() {
+            let sub_module = self.analysis(each_sub_dir);
+            match sub_module {
+                Some(sub_module) => sub_modules.push(sub_module),
+                _ => continue,
+            }
+        }
+        sub_modules
+    }
+}
+
 impl ModuleAnalyzer for MavenModuleAnalyzer {
     fn analysis(&self, module_path: &str) -> Option<Module> {
-        let module_name = get_module_name(module_path);
-        match has_build_file(module_path) {
-            true => Some(Module::new(module_name.as_str(), module_path)),
-            _ => None,
+        let mut module = create_module(module_path);
+        if !module.is_none() {
+            let sub_modules = &mut self.analysis_sub_modules(module_path);
+            module.as_mut().unwrap().add_sub_modules(sub_modules);
         }
+        module
     }
 
     fn is_related(&self, project: &Project) -> bool {
@@ -20,6 +36,14 @@ impl ModuleAnalyzer for MavenModuleAnalyzer {
     }
 }
 
+fn create_module(module_path: &str) -> Option<Module> {
+    let module_name = get_module_name(module_path);
+    match has_build_file(module_path) {
+        true => Some(Module::new(module_name.as_str(), module_path)),
+        _ => None,
+    }
+}
+
 fn has_build_file(module_path: &str) -> bool {
     let file_names = list_file_names(module_path);
     for file_name in file_names.iter() {
diff --git a/psa/src/jvm/psa_jvm.rs b/psa/src/jvm/psa_jvm.rs
index 1372cc36..7bfeb982 100644
--- a/psa/src/jvm/psa_jvm.rs
+++ b/psa/src/jvm/psa_jvm.rs
@@ -16,21 +16,18 @@ pub struct JvmProjectStructureAnalyzer {
 impl JvmProjectStructureAnalyzer {
     fn analysis_modules(&self, project: &Project) -> Vec<Module> {
         let mut modules = Vec::new();
-        let dirs = files::list_dirs(Path::new(&project.path));
-        for each_dir in dirs.iter() {
-            let module = self.analysis_module(project, each_dir);
-            match module {
-                Some(module) => modules.push(module),
-                _ => continue,
-            }
+        let module = self.analysis_module(project);
+        match module {
+            Some(module) => modules.push(module),
+            _ => (),
         }
         modules
     }
 
-    fn analysis_module(&self, project: &Project, module_path: &String) -> Option<Module> {
+    fn analysis_module(&self, project: &Project) -> Option<Module> {
         for module_analyzer in self.module_analyzers.iter() {
             return match module_analyzer.is_related(project) {
-                true => module_analyzer.analysis(module_path),
+                true => module_analyzer.analysis(&project.path),
                 _ => continue,
             };
         }
@@ -123,9 +120,10 @@ mod tests {
 
         let modules = project.modules;
         let project_module = modules.get(0).unwrap();
-        let module1 = modules.get(1).unwrap();
-        let module2 = modules.get(2).unwrap();
-        assert_eq!(modules.len(), 3);
+        let module1 = project_module.sub_modules.get(0).unwrap();
+        let module2 = project_module.sub_modules.get(1).unwrap();
+        assert_eq!(modules.len(), 1);
+        assert_eq!(project_module.sub_modules.len(), 2);
         assert_eq!(project.project_type, "maven");
         assert_eq!(project_module.name, "multi_mod_maven_project");
         assert_eq!(module1.name, "module1");
diff --git a/psa/src/psa_module.rs b/psa/src/psa_module.rs
index 37769889..23e5f527 100644
--- a/psa/src/psa_module.rs
+++ b/psa/src/psa_module.rs
@@ -24,6 +24,10 @@ impl Module {
         self.sub_modules.push(sub_module);
     }
 
+    pub fn add_sub_modules(&mut self, sub_modules: &mut Vec<Module>) {
+        self.sub_modules.append(sub_modules);
+    }
+
     pub fn new(name: &str, path: &str) -> Self {
         Module {
             name: name.to_string(),