Springboot 整合mybatis可能出现的小问题之selectByPrimaryKey(id)查询不出数据

实体类

@Data
public class AppGroupUser extends AppBaseEntity {
    private static final long serialVersionUID = 1L;

    /**
     * 群组用户关系ID
     */
    private String groupUserId;
    /**
     * 群组ID
     */
    private String groupId;
    /**
     * 用户ID
     */
    private String userId;
    /**
     * 群昵称
     */
    private String userNickName;
    /**
     * 用户等级 0-普通用户 1-管理员 2-群主
     */
    private String userRank;
    /**
     * 邀请入群用户id
     */
    private String entryUserId;
    /**
     * 进群方式
     */
    private String entryType;
    /**
     * 禁言 0-未禁言 1-已禁言
     */
    private String sayStatus;

}

Service方法

@Override
public AppGroupUser selectByPrimaryKey(String appGroupUserId) {
     return super.selectByPrimaryKey(appGroupUserId);
}

错误信息

16:50:05.487 [main] DEBUG c.r.s.m.A.selectByPrimaryKey - [debug,159] - ==>  Preparing: SELECT create_time,creator,update_time,updater,del_flag,group_user_id,group_id,user_id,user_nick_name,user_rank,entry_user_id,entry_type,say_status FROM app_group_user WHERE create_time = ? AND creator = ? AND update_time = ? AND updater = ? AND del_flag = ? AND group_user_id = ? AND group_id = ? AND user_id = ? AND user_nick_name = ? AND user_rank = ? AND entry_user_id = ? AND entry_type = ? AND say_status = ? 

org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.type.TypeException: Could not set parameters for mapping: ParameterMapping{property='createTime', mode=IN, javaType=class java.util.Date, jdbcType=null, numericScale=null, resultMapId='null', jdbcTypeName='null', expression='null'}. Cause: org.apache.ibatis.type.TypeException: Error setting non null for parameter #1 with JdbcType null . Try setting a different JdbcType for this parameter or a different configuration property. Cause: java.lang.ClassCastException: java.lang.String cannot be cast to java.util.Date

我明明是经过主键ID 去查询sql的，为啥是所有条件查询？？？

说明mybatis并不知道按照id去查询数据，而是按照全部条件去查询，难怪查询全部queryList()时能查到数据。因此咱们须要指定id为主键才能够。