更新 MybatisDefaultParameterHandler 代码

mybatis-plus-core/src/main/java/com/baomidou/mybatisplus/core/MybatisDefaultParameterHandler.java

@@ -218,7 +218,7 @@ public class MybatisDefaultParameterHandler extends DefaultParameterHandler {
                         MetaObject metaObject = configuration.newMetaObject(parameterObject);
                         value = metaObject.getValue(propertyName);
                     }
-                    TypeHandler<Object> typeHandler = (TypeHandler<Object>) parameterMapping.getTypeHandler();
+                    TypeHandler typeHandler = parameterMapping.getTypeHandler();
                     JdbcType jdbcType = parameterMapping.getJdbcType();
                     if (value == null && jdbcType == null) {
                         jdbcType = configuration.getJdbcTypeForNull();