diff --git a/eladmin-common/pom.xml b/eladmin-common/pom.xml
index c5dc3ae2..180764d6 100644
--- a/eladmin-common/pom.xml
+++ b/eladmin-common/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <artifactId>eladmin</artifactId>
         <groupId>me.zhengjie</groupId>
-        <version>2.6</version>
+        <version>2.7</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
     <properties>
diff --git a/eladmin-common/src/main/java/me/zhengjie/exception/handler/ApiError.java b/eladmin-common/src/main/java/me/zhengjie/exception/handler/ApiError.java
index 5112730b..977788c7 100644
--- a/eladmin-common/src/main/java/me/zhengjie/exception/handler/ApiError.java
+++ b/eladmin-common/src/main/java/me/zhengjie/exception/handler/ApiError.java
@@ -15,9 +15,7 @@
  */
 package me.zhengjie.exception.handler;
 
-import com.fasterxml.jackson.annotation.JsonFormat;
 import lombok.Data;
-import java.time.LocalDateTime;
 
 /**
  * @author Zheng Jie
@@ -27,12 +25,11 @@ import java.time.LocalDateTime;
 class ApiError {
 
     private Integer status = 400;
-    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
-    private LocalDateTime timestamp;
+    private Long timestamp;
     private String message;
 
     private ApiError() {
-        timestamp = LocalDateTime.now();
+        timestamp = System.currentTimeMillis();
     }
 
     public static ApiError error(String message){
diff --git a/eladmin-common/src/main/java/me/zhengjie/utils/QueryHelp.java b/eladmin-common/src/main/java/me/zhengjie/utils/QueryHelp.java
index 5b542faa..587ece98 100644
--- a/eladmin-common/src/main/java/me/zhengjie/utils/QueryHelp.java
+++ b/eladmin-common/src/main/java/me/zhengjie/utils/QueryHelp.java
@@ -53,6 +53,7 @@ public class QueryHelp {
             }
         }
         try {
+            Map<String, Join> joinKey = new HashMap<>();
             List<Field> fields = getAllFields(query.getClass(), new ArrayList<>());
             for (Field field : fields) {
                 boolean accessible = field.isAccessible();
@@ -75,40 +76,43 @@ public class QueryHelp {
                         String[] blurrys = blurry.split(",");
                         List<Predicate> orPredicate = new ArrayList<>();
                         for (String s : blurrys) {
-                            orPredicate.add(cb.like(root.get(s)
-                                    .as(String.class), "%" + val.toString() + "%"));
+                            orPredicate.add(cb.like(root.get(s).as(String.class), "%" + val.toString() + "%"));
                         }
                         Predicate[] p = new Predicate[orPredicate.size()];
                         list.add(cb.or(orPredicate.toArray(p)));
                         continue;
                     }
                     if (ObjectUtil.isNotEmpty(joinName)) {
-                        String[] joinNames = joinName.split(">");
-                        for (String name : joinNames) {
-                            switch (q.join()) {
-                                case LEFT:
-                                    if(ObjectUtil.isNotNull(join) && ObjectUtil.isNotNull(val)){
-                                        join = join.join(name, JoinType.LEFT);
-                                    } else {
-                                        join = root.join(name, JoinType.LEFT);
-                                    }
-                                    break;
-                                case RIGHT:
-                                    if(ObjectUtil.isNotNull(join) && ObjectUtil.isNotNull(val)){
-                                        join = join.join(name, JoinType.RIGHT);
-                                    } else {
-                                        join = root.join(name, JoinType.RIGHT);
-                                    }
-                                    break;
-                                case INNER:
-                                    if(ObjectUtil.isNotNull(join) && ObjectUtil.isNotNull(val)){
-                                        join = join.join(name, JoinType.INNER);
-                                    } else {
-                                        join = root.join(name, JoinType.INNER);
-                                    }
-                                    break;
-                                default: break;
+                        join = joinKey.get(joinName);
+                        if(join == null){
+                            String[] joinNames = joinName.split(">");
+                            for (String name : joinNames) {
+                                switch (q.join()) {
+                                    case LEFT:
+                                        if(ObjectUtil.isNotNull(join) && ObjectUtil.isNotNull(val)){
+                                            join = join.join(name, JoinType.LEFT);
+                                        } else {
+                                            join = root.join(name, JoinType.LEFT);
+                                        }
+                                        break;
+                                    case RIGHT:
+                                        if(ObjectUtil.isNotNull(join) && ObjectUtil.isNotNull(val)){
+                                            join = join.join(name, JoinType.RIGHT);
+                                        } else {
+                                            join = root.join(name, JoinType.RIGHT);
+                                        }
+                                        break;
+                                    case INNER:
+                                        if(ObjectUtil.isNotNull(join) && ObjectUtil.isNotNull(val)){
+                                            join = join.join(name, JoinType.INNER);
+                                        } else {
+                                            join = root.join(name, JoinType.INNER);
+                                        }
+                                        break;
+                                    default: break;
+                                }
                             }
+                            joinKey.put(joinName, join);
                         }
                     }
                     switch (q.type()) {
diff --git a/eladmin-common/src/main/java/me/zhengjie/utils/StringUtils.java b/eladmin-common/src/main/java/me/zhengjie/utils/StringUtils.java
index 9c87bd4c..ddb9f2f5 100644
--- a/eladmin-common/src/main/java/me/zhengjie/utils/StringUtils.java
+++ b/eladmin-common/src/main/java/me/zhengjie/utils/StringUtils.java
@@ -15,11 +15,11 @@
  */
 package me.zhengjie.utils;
 
+import cn.hutool.http.useragent.UserAgent;
+import cn.hutool.http.useragent.UserAgentUtil;
 import lombok.extern.slf4j.Slf4j;
 import net.dreamlu.mica.ip2region.core.Ip2regionSearcher;
 import net.dreamlu.mica.ip2region.core.IpInfo;
-import nl.basjes.parse.useragent.UserAgent;
-import nl.basjes.parse.useragent.UserAgentAnalyzer;
 import javax.servlet.http.HttpServletRequest;
 import java.net.InetAddress;
 import java.net.NetworkInterface;
@@ -43,14 +43,6 @@ public class StringUtils extends org.apache.commons.lang3.StringUtils {
      */
     private final static Ip2regionSearcher IP_SEARCHER = SpringContextHolder.getBean(Ip2regionSearcher.class);
 
-
-    private static final UserAgentAnalyzer USER_AGENT_ANALYZER = UserAgentAnalyzer
-            .newBuilder()
-            .hideMatcherLoadStats()
-            .withCache(10000)
-            .withField(UserAgent.AGENT_NAME_VERSION)
-            .build();
-
     /**
      * 驼峰命名法工具
      *
@@ -178,8 +170,8 @@ public class StringUtils extends org.apache.commons.lang3.StringUtils {
     }
 
     public static String getBrowser(HttpServletRequest request) {
-        UserAgent.ImmutableUserAgent userAgent = USER_AGENT_ANALYZER.parse(request.getHeader("User-Agent"));
-        return userAgent.get(UserAgent.AGENT_NAME_VERSION).getValue();
+        UserAgent ua = UserAgentUtil.parse(request.getHeader("User-Agent"));
+        return ua.getBrowser().toString() + " " + ua.getVersion();
     }
 
     /**
diff --git a/eladmin-generator/pom.xml b/eladmin-generator/pom.xml
index 96089616..3584959b 100644
--- a/eladmin-generator/pom.xml
+++ b/eladmin-generator/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <artifactId>eladmin</artifactId>
         <groupId>me.zhengjie</groupId>
-        <version>2.6</version>
+        <version>2.7</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
@@ -20,7 +20,7 @@
         <dependency>
             <groupId>me.zhengjie</groupId>
             <artifactId>eladmin-common</artifactId>
-            <version>2.6</version>
+            <version>2.7</version>
         </dependency>
 
         <!--模板引擎-->
diff --git a/eladmin-logging/pom.xml b/eladmin-logging/pom.xml
index a713b3f8..8613702d 100644
--- a/eladmin-logging/pom.xml
+++ b/eladmin-logging/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <artifactId>eladmin</artifactId>
         <groupId>me.zhengjie</groupId>
-        <version>2.6</version>
+        <version>2.7</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
@@ -16,7 +16,7 @@
         <dependency>
             <groupId>me.zhengjie</groupId>
             <artifactId>eladmin-common</artifactId>
-            <version>2.6</version>
+            <version>2.7</version>
         </dependency>
     </dependencies>
 </project>
\ No newline at end of file
diff --git a/eladmin-system/pom.xml b/eladmin-system/pom.xml
index fc36c5c5..8f9b969c 100644
--- a/eladmin-system/pom.xml
+++ b/eladmin-system/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <artifactId>eladmin</artifactId>
         <groupId>me.zhengjie</groupId>
-        <version>2.6</version>
+        <version>2.7</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
@@ -23,7 +23,7 @@
         <dependency>
             <groupId>me.zhengjie</groupId>
             <artifactId>eladmin-generator</artifactId>
-            <version>2.6</version>
+            <version>2.7</version>
             <exclusions>
                 <exclusion>
                     <groupId>me.zhengjie</groupId>
@@ -36,7 +36,7 @@
         <dependency>
             <groupId>me.zhengjie</groupId>
             <artifactId>eladmin-tools</artifactId>
-            <version>2.6</version>
+            <version>2.7</version>
         </dependency>
 
         <!-- Spring boot websocket -->
diff --git a/eladmin-system/src/main/java/me/zhengjie/modules/system/domain/vo/MenuVo.java b/eladmin-system/src/main/java/me/zhengjie/modules/system/domain/vo/MenuVo.java
index 82fc0cc5..e1efa5a8 100644
--- a/eladmin-system/src/main/java/me/zhengjie/modules/system/domain/vo/MenuVo.java
+++ b/eladmin-system/src/main/java/me/zhengjie/modules/system/domain/vo/MenuVo.java
@@ -15,7 +15,6 @@
  */
 package me.zhengjie.modules.system.domain.vo;
 
-import com.fasterxml.jackson.annotation.JsonInclude;
 import lombok.Data;
 import java.io.Serializable;
 import java.util.List;
@@ -26,7 +25,6 @@ import java.util.List;
  * @date 2018-12-20
  */
 @Data
-@JsonInclude(JsonInclude.Include.NON_EMPTY)
 public class MenuVo implements Serializable {
 
     private String name;
diff --git a/eladmin-system/src/main/java/me/zhengjie/modules/system/service/dto/DeptDto.java b/eladmin-system/src/main/java/me/zhengjie/modules/system/service/dto/DeptDto.java
index 4c3b12aa..bc236a11 100644
--- a/eladmin-system/src/main/java/me/zhengjie/modules/system/service/dto/DeptDto.java
+++ b/eladmin-system/src/main/java/me/zhengjie/modules/system/service/dto/DeptDto.java
@@ -15,7 +15,6 @@
  */
 package me.zhengjie.modules.system.service.dto;
 
-import com.fasterxml.jackson.annotation.JsonInclude;
 import lombok.Getter;
 import lombok.Setter;
 import me.zhengjie.base.BaseDTO;
@@ -39,7 +38,6 @@ public class DeptDto extends BaseDTO implements Serializable {
 
     private Integer deptSort;
 
-    @JsonInclude(JsonInclude.Include.NON_EMPTY)
     private List<DeptDto> children;
 
     private Long pid;
diff --git a/eladmin-system/src/main/resources/config/application.yml b/eladmin-system/src/main/resources/config/application.yml
index 5a138603..1434cd86 100644
--- a/eladmin-system/src/main/resources/config/application.yml
+++ b/eladmin-system/src/main/resources/config/application.yml
@@ -2,14 +2,13 @@ server:
   port: 8000
   compression:
     enabled: true
+    mime-types: text/html,text/xml,text/plain,text/css,text/javascript,application/javascript,application/json
 
 spring:
   freemarker:
     check-template-location: false
   profiles:
     active: dev
-  jackson:
-    time-zone: GMT+8
   data:
     redis:
       repositories:
diff --git a/eladmin-tools/pom.xml b/eladmin-tools/pom.xml
index dbf5e63b..7c85d8b0 100644
--- a/eladmin-tools/pom.xml
+++ b/eladmin-tools/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <artifactId>eladmin</artifactId>
         <groupId>me.zhengjie</groupId>
-        <version>2.6</version>
+        <version>2.7</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
@@ -23,7 +23,7 @@
         <dependency>
             <groupId>me.zhengjie</groupId>
             <artifactId>eladmin-logging</artifactId>
-            <version>2.6</version>
+            <version>2.7</version>
         </dependency>
 
         <!--邮件依赖-->
diff --git a/pom.xml b/pom.xml
index 9668b9ca..979ad6ef 100644
--- a/pom.xml
+++ b/pom.xml
@@ -7,7 +7,7 @@
     <groupId>me.zhengjie</groupId>
     <artifactId>eladmin</artifactId>
     <packaging>pom</packaging>
-    <version>2.6</version>
+    <version>2.7</version>
 
     <modules>
         <module>eladmin-common</module>
@@ -188,13 +188,6 @@
             <artifactId>commons-text</artifactId>
             <version>1.10.0</version>
         </dependency>
-
-        <!-- 解析客户端操作系统、浏览器信息 -->
-        <dependency>
-            <groupId>nl.basjes.parse.useragent</groupId>
-            <artifactId>yauaa</artifactId>
-            <version>6.11</version>
-        </dependency>
     </dependencies>
 
     <build>