diff --git a/web-infrastructure/src/main/resources/mapper/study/ClassMapper.xml b/web-infrastructure/src/main/resources/mapper/study/ClassMapper.xml
index b857f9f..61ace8a 100644
--- a/web-infrastructure/src/main/resources/mapper/study/ClassMapper.xml
+++ b/web-infrastructure/src/main/resources/mapper/study/ClassMapper.xml
@@ -217,16 +217,16 @@
                 and s.exam_sign_flag = #{params.examination}
             </if>
             <if test="params.eqState != null  ">
-                <if test = "params.eqState = 1">
+                <if test = "params.eqState == 1">
                     and c.state = 1
                 </if>
-                <if test = "params.eqState = 2">
+                <if test = "params.eqState == 2">
                     and c.state = 2 and c.start_time > now()
                 </if>
-                <if test = "params.eqState = 3">
+                <if test = "params.eqState == 3">
                     and c.state = 2 and c.end_time > now() and c.start_time &lt;= now()
                 </if>
-                <if test = "params.eqState = 4">
+                <if test = "params.eqState == 4">
                     and c.state = 2 and c.end_time &lt;= now()
                 </if>
             </if>