关于mybatis:Mybatis单表增删改查抽取

在日常开发中，针对mybatis单表的增删改查咱们能够提取进去或者采纳mybatisplus

1. 抽取公共Dao接口

public interface IBaseDao<T> {    int deleteByPrimaryKey(Long id);    int insert(T t);    int insertSelective(T t);    T selectByPrimaryKey(Long id);    int updateByPrimaryKeySelective(T t);    int updateByPrimaryKey(T t);}

2. 抽取公共Service

public interface IBaseService<T> {    int deleteByPrimaryKey(Long id);    int insert(T t);    int insertSelective(T t);    T selectByPrimaryKey(Long id);    int updateByPrimaryKeySelective(T t);    int updateByPrimaryKey(T t);}

public abstract class BaseServiceImpl<T> implements IBaseService<T>{    public abstract IBaseDao<T> getBaseDao();    @Override    public int deleteByPrimaryKey(Long id) {        return getBaseDao().deleteByPrimaryKey(id);    }    @Override    public int insert(T t) {        return getBaseDao().insert(t);    }    @Override    public int insertSelective(T t) {        return getBaseDao().insertSelective(t);    }    @Override    public T selectByPrimaryKey(Long id) {        return getBaseDao().selectByPrimaryKey(id);    }    @Override    public int updateByPrimaryKeySelective(T t) {        return getBaseDao().updateByPrimaryKeySelective(t);    }    @Override    public int updateByPrimaryKey(T t) {        return getBaseDao().updateByPrimaryKey(t);    }}

之后咱们写的Mapper接口须要继承IBaseDao<?>,
Service层接口须要继承IBaseService<?>并补上泛型，实现类除了实现接口还须要继承BaseServiceImpl，并重写getBaseDao()办法返回对应的mapper接口，这样根本的增删改查咱们就不必写了。