java-sevice-demo/src/main/java/com/yunzhi/demo/service/impl/BaseServiceImpl.java

package com.yunzhi.demo.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.conditions.update.UpdateWrapper;
import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.baomidou.mybatisplus.core.metadata.TableInfo;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.baomidou.mybatisplus.extension.toolkit.SqlHelper;
import com.yunzhi.demo.service.IBaseService;

import java.io.Serializable;

public class BaseServiceImpl<M extends BaseMapper<T>, T> extends ServiceImpl<M, T> implements IBaseService<T> {
    @Override
    public boolean removeLogicById(Serializable id) {

        TableInfo tableInfo = SqlHelper.table(currentModelClass());
        UpdateWrapper<T> updateWrapper = new UpdateWrapper<>();
        updateWrapper.set("state", -1)
                .eq(tableInfo.getKeyColumn(), id);

        return update(updateWrapper);
    }

    @Override
    public int countBy(String column, Object value, boolean notDelete) {
        QueryWrapper<T> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq(column, value);
        queryWrapper.gt(notDelete, "state", -1);

        return count(queryWrapper);
    }

    @Override
    public T getByButNot(String column, Object value, String col, Object val, boolean notDelete) {
        QueryWrapper<T> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq(column, value);
        queryWrapper.ne(col, val);
        queryWrapper.gt(notDelete, "state", -1);
        queryWrapper.last("limit 1");

        return getOne(queryWrapper);
    }

    @Override
    public T getExistBy(String column, Object value, boolean normal, boolean notDelete) {
        QueryWrapper<T> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq(column, value);
        queryWrapper.eq(normal, "state", 1);
        queryWrapper.gt(notDelete, "state", -1);
        queryWrapper.last("limit 1");
        return getOne(queryWrapper);
    }
}