diff --git a/ruoyi-system/src/main/java/com/ruoyi/system/mapper/SysUserOnlineMapper.java b/ruoyi-system/src/main/java/com/ruoyi/system/mapper/SysUserOnlineMapper.java
index 5bd68ed..94aec47 100644
--- a/ruoyi-system/src/main/java/com/ruoyi/system/mapper/SysUserOnlineMapper.java
+++ b/ruoyi-system/src/main/java/com/ruoyi/system/mapper/SysUserOnlineMapper.java
@@ -34,6 +34,16 @@ public interface SysUserOnlineMapper
      */
     public int saveOnline(SysUserOnline online);
 
+
+    /**
+     *
+     *  修改
+     * @param online
+     * @return int
+     */
+
+    public int updateOnline(SysUserOnline online);
+
     /**
      * 查询会话集合
      * 
diff --git a/ruoyi-system/src/main/java/com/ruoyi/system/service/impl/SysUserOnlineServiceImpl.java b/ruoyi-system/src/main/java/com/ruoyi/system/service/impl/SysUserOnlineServiceImpl.java
index ae6087a..91c13c2 100644
--- a/ruoyi-system/src/main/java/com/ruoyi/system/service/impl/SysUserOnlineServiceImpl.java
+++ b/ruoyi-system/src/main/java/com/ruoyi/system/service/impl/SysUserOnlineServiceImpl.java
@@ -82,9 +82,16 @@ public class SysUserOnlineServiceImpl implements ISysUserOnlineService
     @Override
     public void saveOnline(SysUserOnline online)
     {
-        userOnlineDao.saveOnline(online);
+        SysUserOnline  sysUserOnline = userOnlineDao.selectOnlineById(online.getSessionId());
+        if(StringUtils.isNull(sysUserOnline)){
+            userOnlineDao.saveOnline(online);
+        }else{
+            userOnlineDao.updateOnline(online);
+        }
+
     }
 
+
     /**
      * 查询会话集合
      * 
diff --git a/ruoyi-system/src/main/resources/mapper/system/SysUserOnlineMapper.xml b/ruoyi-system/src/main/resources/mapper/system/SysUserOnlineMapper.xml
index ff85fd8..47f7295 100644
--- a/ruoyi-system/src/main/resources/mapper/system/SysUserOnlineMapper.xml
+++ b/ruoyi-system/src/main/resources/mapper/system/SysUserOnlineMapper.xml
@@ -29,9 +29,26 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
 	</select>
 
 	<insert id="saveOnline" parameterType="SysUserOnline">
-		replace into sys_user_online(sessionId, login_name, dept_name, ipaddr, login_location, browser, os, status, start_timestamp, last_access_time, expire_time)
+		insert into sys_user_online(sessionId, login_name, dept_name, ipaddr, login_location, browser, os, status, start_timestamp, last_access_time, expire_time)
         values (#{sessionId}, #{loginName}, #{deptName}, #{ipaddr}, #{loginLocation}, #{browser}, #{os}, #{status}, #{startTimestamp}, #{lastAccessTime}, #{expireTime})
 	</insert>
+
+	<update id="updateOnline" parameterType="SysUserOnline">
+		update sys_user_online
+		<set>
+			<if test="loginName != null ">login_name = #{loginName},</if>
+			<if test="deptName != null and deptName != ''">dept_name = #{deptName},</if>
+			<if test="ipaddr != null and ipaddr != ''">ipaddr = #{ipaddr},</if>
+			<if test="loginLocation != null and loginLocation != ''">login_location = #{loginLocation},</if>
+			<if test="browser != null and browser != ''">browser = #{browser},</if>
+			<if test="os != null and os != ''">os = #{os},</if>
+			<if test="status != null">status = #{status},</if>
+			<if test="startTimestamp != null ">start_timestamp = #{startTimestamp},</if>
+			<if test="lastAccessTime != null ">last_access_time = #{lastAccessTime},</if>
+			<if test="expireTime != null ">expire_time = #{expireTime},</if>
+		</set>
+		where sessionId = #{sessionId}
+	</update>
 	
  	<delete id="deleteOnlineById" parameterType="String">
  		delete from sys_user_online where sessionId = #{sessionId}