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。