diff --git a/designer_base/src/com/fr/design/data/datapane/ChoosePane.java b/designer_base/src/com/fr/design/data/datapane/ChoosePane.java
index 6d6bce0e5..17ee74f82 100644
--- a/designer_base/src/com/fr/design/data/datapane/ChoosePane.java
+++ b/designer_base/src/com/fr/design/data/datapane/ChoosePane.java
@@ -7,6 +7,7 @@ import com.fr.data.core.DataCoreUtils;
 import com.fr.data.core.db.DBUtils;
 import com.fr.data.core.db.TableProcedure;
 import com.fr.data.core.db.dialect.DialectFactory;
+import com.fr.data.impl.Connection;
 import com.fr.data.impl.DBTableData;
 import com.fr.dav.LocalEnv;
 import com.fr.design.DesignerEnvManager;
@@ -17,7 +18,11 @@ import com.fr.design.data.datapane.preview.PreviewLabel;
 import com.fr.design.data.datapane.preview.PreviewLabel.Previewable;
 import com.fr.design.data.datapane.preview.PreviewTablePane;
 import com.fr.design.data.tabledata.Prepare4DataSourceChange;
-import com.fr.design.gui.icombobox.*;
+import com.fr.design.gui.icombobox.FRTreeComboBox;
+import com.fr.design.gui.icombobox.FilterableComboBoxModel;
+import com.fr.design.gui.icombobox.UIComboBox;
+import com.fr.design.gui.icombobox.UIComboBoxEditor;
+import com.fr.design.gui.icombobox.UIComboBoxRenderer;
 import com.fr.design.gui.ilable.UILabel;
 import com.fr.design.gui.itree.refreshabletree.ExpandMutableTreeNode;
 import com.fr.design.layout.FRGUIPaneFactory;
@@ -37,7 +42,12 @@ import javax.swing.event.ChangeEvent;
 import javax.swing.event.ChangeListener;
 import javax.swing.event.PopupMenuEvent;
 import javax.swing.event.PopupMenuListener;
-import javax.swing.tree.*;
+import javax.swing.tree.DefaultMutableTreeNode;
+import javax.swing.tree.DefaultTreeCellRenderer;
+import javax.swing.tree.DefaultTreeModel;
+import javax.swing.tree.TreeCellRenderer;
+import javax.swing.tree.TreeNode;
+import javax.swing.tree.TreePath;
 import java.awt.*;
 import java.awt.event.FocusAdapter;
 import java.awt.event.FocusEvent;
@@ -45,8 +55,8 @@ import java.awt.event.ItemEvent;
 import java.awt.event.ItemListener;
 import java.util.ArrayList;
 import java.util.Enumeration;
-import java.util.Iterator;
 import java.util.List;
+import java.util.Map;
 
 /**
  * @author zhou
@@ -179,12 +189,8 @@ public class ChoosePane extends BasicBeanPane<DataBaseItems> implements Refresha
     protected void initDsNameComboBox() {
         dsNameComboBox.setRefreshingModel(true);
         ConnectionConfig connectionConfig = ConnectionConfig.getInstance();
-        @SuppressWarnings("unchecked")
-        Iterator<String> datasourceNameIterator = connectionConfig.getConnections().keySet().iterator();
-        List<String> dsList = new ArrayList<String>();
-        while (datasourceNameIterator.hasNext()) {
-            dsList.add((String) datasourceNameIterator.next());
-        }
+        List<String> dsList = new ArrayList<>();
+        dsList.addAll(connectionConfig.getConnections().keySet());
         FilterableComboBoxModel dsNameComboBoxModel = new FilterableComboBoxModel(dsList);
         dsNameComboBox.setModel(dsNameComboBoxModel);
         dsNameComboBox.setRefreshingModel(false);
@@ -286,12 +292,9 @@ public class ChoosePane extends BasicBeanPane<DataBaseItems> implements Refresha
             return null; // peter:选中了当前的零长度的节点,直接返回.
         }
         ConnectionConfig connectionConfig = ConnectionConfig.getInstance();
-        @SuppressWarnings("unchecked")
-        Iterator<String> datasourceNameIterator = connectionConfig.getConnections().keySet().iterator();
-        while (datasourceNameIterator.hasNext()) {
-            String datasourceName = datasourceNameIterator.next();
-            if (ComparatorUtils.equals(selectedDSName, datasourceName)) {
-                return connectionConfig.getConnection(datasourceName);
+        for (Map.Entry<String, Connection> entry: connectionConfig.getConnections().entrySet()) {
+            if (ComparatorUtils.equals(selectedDSName, entry.getKey())) {
+                return entry.getValue();
             }
         }
         return null;
diff --git a/designer_base/src/com/fr/design/data/datapane/connect/ConnectionListPane.java b/designer_base/src/com/fr/design/data/datapane/connect/ConnectionListPane.java
index 7cb3b5df3..956625f13 100644
--- a/designer_base/src/com/fr/design/data/datapane/connect/ConnectionListPane.java
+++ b/designer_base/src/com/fr/design/data/datapane/connect/ConnectionListPane.java
@@ -133,12 +133,9 @@ public class ConnectionListPane extends JListControlPane implements ConnectionSh
      * @param connectionConfig the new datasourceManager.
      */
     public void populate(ConnectionConfig connectionConfig) {
-        Iterator<String> nameIt = connectionConfig.getConnections().keySet().iterator();
-
         List<NameObject> nameObjectList = new ArrayList<NameObject>();
-        while (nameIt.hasNext()) {
-            String name = nameIt.next();
-            nameObjectList.add(new NameObject(name, connectionConfig.getConnection(name)));
+        for (Map.Entry<String, Connection> entry : connectionConfig.getConnections().entrySet()) {
+            nameObjectList.add(new NameObject(entry.getKey(), entry.getValue()));
         }
         this.populate(nameObjectList.toArray(new NameObject[nameObjectList.size()]));
 
diff --git a/designer_base/src/com/fr/design/data/datapane/connect/ConnectionManagerPane.java b/designer_base/src/com/fr/design/data/datapane/connect/ConnectionManagerPane.java
index f91b16d7e..aa0980ad5 100644
--- a/designer_base/src/com/fr/design/data/datapane/connect/ConnectionManagerPane.java
+++ b/designer_base/src/com/fr/design/data/datapane/connect/ConnectionManagerPane.java
@@ -46,7 +46,6 @@ public class ConnectionManagerPane extends LoadingBasicPane implements Connectio
     }
 
     public void populate(ConnectionConfig datasourceManager) {
-        //todo 原来界面上显示的xml路径
 //        this.connectionTextField.setText(FRContext.getCurrentEnv().getPath() + File.separator + ProjectConstants.RESOURCES_NAME
 //                + File.separator + datasourceManager.fileName());
         this.connectionListPane.populate(datasourceManager);