SpringBoot整合MybatisPlus绑定异常( org.apache.ibatis.binding.BindingException: Invalid bound statement ...

SpringBoot整合MP过程中报错

org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): com.wjx.demo3_admin.Mapper.EmpMapper.deleteById
	at org.apache.ibatis.binding.MapperMethod$SqlCommand.(MapperMethod.java:235) ~[mybatis-3.5.9.jar:3.5.9]
	at com.baomidou.mybatisplus.core.override.MybatisMapperMethod.(MybatisMapperMethod.java:50) ~[mybatis-plus-core-3.5.1.jar:3.5.1]
	at com.baomidou.mybatisplus.core.override.MybatisMapperProxy.lambda$cachedInvoker$0(MybatisMapperProxy.java:111) ~[mybatis-plus-core-3.5.1.jar:3.5.1]
	at java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1660) ~[na:1.8.0_301]
	at com.baomidou.mybatisplus.core.toolkit.CollectionUtils.computeIfAbsent(CollectionUtils.java:115) ~[mybatis-plus-core-3.5.1.jar:3.5.1]
...

原因:MP的deleteById根据主键进行删除，如果没有在实体类中用注解@TableId标注主键字段，那么该字段的名称必须为 id

解决1：实体类主键添加@TableId注解

@TableId
    private int eid;

解决2：实体类主键字段改名为 id

private int id;