diff --git a/designer-base/src/main/java/com/fr/design/gui/itree/filetree/EnvFileTree.java b/designer-base/src/main/java/com/fr/design/gui/itree/filetree/EnvFileTree.java
index 435d5a465a..f3771a0f90 100644
--- a/designer-base/src/main/java/com/fr/design/gui/itree/filetree/EnvFileTree.java
+++ b/designer-base/src/main/java/com/fr/design/gui/itree/filetree/EnvFileTree.java
@@ -13,6 +13,8 @@ import com.fr.stable.CoreConstants;
 import com.fr.stable.StableUtils;
 import com.fr.workspace.WorkContext;
 
+import java.util.HashMap;
+import java.util.Map;
 import javax.swing.BorderFactory;
 import javax.swing.JTree;
 import javax.swing.tree.DefaultTreeCellRenderer;
@@ -21,7 +23,6 @@ import javax.swing.tree.TreePath;
 import java.awt.Color;
 import java.awt.Component;
 import java.io.File;
-import java.util.ArrayList;
 import java.util.Arrays;
 
 /*
@@ -199,14 +200,14 @@ public class EnvFileTree extends RefreshableJTree {
 
         // 用FileNodeFilter过滤一下
         if (filter != null) {
-            java.util.List<FileNode> tList = new ArrayList<FileNode>();
-            for (int i = 0; i < resFns.length; i++) {
-                if (filter.accept(resFns[i])) {
-                    tList.add(resFns[i]);
+            Map<String, FileNode> fileNodes = new HashMap<>();
+            for (FileNode fileNode : resFns) {
+                // war包部署下会生成两份classes目录，需要去重一下
+                if (filter.accept(fileNode)) {
+                    fileNodes.put(fileNode.getName(), fileNode);
                 }
             }
-
-            resFns = tList.toArray(new FileNode[tList.size()]);
+            resFns = fileNodes.values().toArray(new FileNode[fileNodes.size()]);
         }
 
         Arrays.sort(resFns, new FileNodeComparator(FRContext.getFileNodes().getSupportedTypes()));