diff --git a/src/main/java/com/sunyard/sge/database/SydApi4Database.java b/src/main/java/com/sunyard/sge/database/SydApi4Database.java
index f101abe..4094c80 100644
--- a/src/main/java/com/sunyard/sge/database/SydApi4Database.java
+++ b/src/main/java/com/sunyard/sge/database/SydApi4Database.java
@@ -13,9 +13,11 @@ import java.util.List;
 public class SydApi4Database implements SydApi {
 
     private SydApi4j[] hsms = null;
+    private boolean isShortLinkMode = false;
 
     @Deprecated
     public SydApi4Database() {
+        isShortLinkMode = true;
     }
 
     public SydApi4Database(SydApi4j[] hsms) {
@@ -25,20 +27,23 @@ public class SydApi4Database implements SydApi {
     @Override
     public SydApi SYD_Connect_Ex(String[] pcIpList, int[] iPortList, int iConnectTimeOut, int iDealTimeOut) {
         SydApi4j api = (SydApi4j) new SydApi4j().connect(pcIpList[0], iPortList[0], null, iConnectTimeOut);
-        hsms = new SydApi4j[]{ api };
+        hsms = new SydApi4j[]{api};
         return this;
     }
 
     @Override
     public void SYD_Disconnect_Ex() {
+        if (isShortLinkMode) {
+            SydApi4j api = hsms[0];
+            if (null != api) {
+                try {
+                    api.disconnect();
+                } catch (Exception e) {
+                }
+            }
+            api = null;
+        }
         // 配合链接池，不再需要释放。
-//        if ( null != api ) {
-//            try {
-//                api.disconnect();
-//            }catch ( Exception e ){
-//            }
-//        }
-//        api = null;
     }
 
     @Override
diff --git a/src/main/java/com/sunyard/sge/database/pool/SydApiPool.java b/src/main/java/com/sunyard/sge/database/pool/SydApiPool.java
index 676e8f6..7239a2a 100644
--- a/src/main/java/com/sunyard/sge/database/pool/SydApiPool.java
+++ b/src/main/java/com/sunyard/sge/database/pool/SydApiPool.java
@@ -42,12 +42,25 @@ public class SydApiPool extends ThreadBasedConnectPool<SydApi> {
 
     // 保活接口
     protected boolean check(SydApi o) {
-        null != o;
+        if ( null == o ) {
+            return false;
+        }
+        try {
+
+            o.SYD_SM3_Hash_ShortData( new byte[8] );
+            return true;
+
+        }catch ( Exception e) {
+            // 忽略
+            return false;
+        }
     }
 
     // 释放
     protected void free(SydApi o) {
-        o.SYD_Disconnect_Ex();
+        if ( null != o ) {
+            o.SYD_Disconnect_Ex();
+        }
     }
 
 }