diff --git a/diboot-core/src/main/java/com/diboot/core/entity/BaseEntity.java b/diboot-core/src/main/java/com/diboot/core/entity/BaseEntity.java
index cd41b48..7072409 100644
--- a/diboot-core/src/main/java/com/diboot/core/entity/BaseEntity.java
+++ b/diboot-core/src/main/java/com/diboot/core/entity/BaseEntity.java
@@ -1,10 +1,7 @@
 package com.diboot.core.entity;
 
 import com.alibaba.fastjson.annotation.JSONField;
-import com.baomidou.mybatisplus.annotation.IdType;
-import com.baomidou.mybatisplus.annotation.TableField;
-import com.baomidou.mybatisplus.annotation.TableId;
-import com.baomidou.mybatisplus.annotation.TableLogic;
+import com.baomidou.mybatisplus.annotation.*;
 import com.diboot.core.util.JSON;
 
 import java.io.Serializable;
@@ -37,7 +34,7 @@ public abstract class BaseEntity implements Serializable {
     /***
      * 默认记录创建时间字段，新建时由数据库赋值
      */
-    @TableField(update="now()")
+    @TableField(insertStrategy = FieldStrategy.NEVER, updateStrategy = FieldStrategy.NEVER)
     private Date createTime;
 
     public Long getId() {
diff --git a/diboot-core/src/main/java/com/diboot/core/service/impl/DictionaryServiceImpl.java b/diboot-core/src/main/java/com/diboot/core/service/impl/DictionaryServiceImpl.java
index a8908ec..c48896b 100644
--- a/diboot-core/src/main/java/com/diboot/core/service/impl/DictionaryServiceImpl.java
+++ b/diboot-core/src/main/java/com/diboot/core/service/impl/DictionaryServiceImpl.java
@@ -10,6 +10,7 @@ import com.diboot.core.vo.DictionaryVO;
 import com.diboot.core.vo.KeyValue;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+import org.springframework.context.annotation.Primary;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
@@ -21,6 +22,7 @@ import java.util.List;
  * @version 2.0
  * @date 2019/01/01
  */
+@Primary
 @Service("dictionaryService")
 public class DictionaryServiceImpl extends BaseServiceImpl<DictionaryMapper, Dictionary> implements DictionaryService {
     private static final Logger log = LoggerFactory.getLogger(DictionaryServiceImpl.class);
diff --git a/diboot-core/src/main/java/com/diboot/core/vo/JsonResult.java b/diboot-core/src/main/java/com/diboot/core/vo/JsonResult.java
index 49535ab..400efa2 100644
--- a/diboot-core/src/main/java/com/diboot/core/vo/JsonResult.java
+++ b/diboot-core/src/main/java/com/diboot/core/vo/JsonResult.java
@@ -1,5 +1,6 @@
 package com.diboot.core.vo;
 
+import com.diboot.core.util.S;
 import com.diboot.core.util.V;
 
 import java.io.Serializable;
@@ -38,10 +39,8 @@ public class JsonResult implements Serializable {
     public JsonResult(Object data, String... additionalMsg){
         this.code = Status.OK.code();
         this.msg = Status.OK.label();
+        initMsg(additionalMsg);
         this.data = data;
-        if(V.notEmpty(additionalMsg)){
-            this.msg += ": " + additionalMsg[0];
-        }
     }
 
     /***
@@ -52,9 +51,7 @@ public class JsonResult implements Serializable {
     public JsonResult(Status status, String... additionalMsg){
         this.code = status.code();
         this.msg = status.label();
-        if(V.notEmpty(additionalMsg)){
-            this.msg += ": " + additionalMsg[0];
-        }
+        initMsg(additionalMsg);
         this.data = null;
     }
 
@@ -64,9 +61,7 @@ public class JsonResult implements Serializable {
     public JsonResult(Status status, Object data, String... additionalMsg){
         this.code = status.code();
         this.msg = status.label();
-        if(V.notEmpty(additionalMsg)){
-            this.msg += ": " + additionalMsg[0];
-        }
+        initMsg(additionalMsg);
         this.data = data;
     }
 
@@ -99,4 +94,20 @@ public class JsonResult implements Serializable {
     public Object getData() {
         return data;
     }
+
+    /**
+     * 赋值msg（去掉重复前缀以支持与BusinessException嵌套使用）
+     * @param additionalMsg
+     */
+    private void initMsg(String... additionalMsg){
+        if(V.notEmpty(additionalMsg)){
+            if(S.startsWith(additionalMsg[0], this.msg)){
+                this.msg = additionalMsg[0];
+            }
+            else{
+                this.msg += ": " + additionalMsg[0];
+            }
+        }
+    }
+
 }
\ No newline at end of file
diff --git a/diboot-core/src/test/java/diboot/core/test/service/BaseServiceTest.java b/diboot-core/src/test/java/diboot/core/test/service/BaseServiceTest.java
index 80acdd8..4ddf787 100644
--- a/diboot-core/src/test/java/diboot/core/test/service/BaseServiceTest.java
+++ b/diboot-core/src/test/java/diboot/core/test/service/BaseServiceTest.java
@@ -20,6 +20,7 @@ import org.springframework.test.context.ContextConfiguration;
 import org.springframework.test.context.junit4.SpringRunner;
 
 import java.util.ArrayList;
+import java.util.Date;
 import java.util.List;
 
 /**
@@ -125,6 +126,10 @@ public class BaseServiceTest {
         success = dictionaryService.createEntities(dictionaryList);
         Assert.assertTrue(success);
 
+        dictionaryList.get(2).setCreateTime(new Date());
+        dictionaryList.get(2).setItemValue("HZ2");
+        dictionaryService.updateEntity(dictionaryList.get(2));
+
         success = clearTestData(TYPE);
         Assert.assertTrue(success);
     }