4月14号总结

package com.itheima.mapper;

import com.itheima.pojo.Brand;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.ResultMap;
import org.apache.ibatis.annotations.Select;

import java.util.List;

public interface BrandMapper {

    /**
     * 查询所有
     * @return
     */
    @Select("select * from tb_brand")
    @ResultMap("brandResultMap")
    List<Brand> selectAll();

    /**
     * 添加数据
     * @param brand
     */
    @Insert("insert into tb_brand values(null,#{brandName},#{companyName},#{ordered},#{description},#{status})")
    void add(Brand brand);


    /**
     * 批量删除
     * @param ids
     */
    void deleteByIds(@Param("ids") int[] ids);

    /**
     * 分页查询
     * @param begin
     * @param size
     * @return
     */
    @Select("select * from tb_brand limit #{begin} , #{size}")
    @ResultMap("brandResultMap")
    List<Brand> selectByPage(@Param("begin") int begin,@Param("size") int size);

    /**
     * 查询总记录数
     * @return
     */
    @Select("select count(*) from tb_brand ")
    int selectTotalCount();



    /**
     * 分页条件查询
     * @param begin
     * @param size
     * @return
     */
    List<Brand> selectByPageAndCondition(@Param("begin") int begin,@Param("size") int size,@Param("brand") Brand brand);

    /**
     * 根据条件查询总记录数
     * @return
     */
    int selectTotalCountByCondition(Brand brand);

}

package com.itheima.pojo;

public class Brand {
    // id 主键
    private Integer id;
    // 品牌名称
    private String brandName;
    // 企业名称
    private String companyName;
    // 排序字段
    private Integer ordered;
    // 描述信息
    private String description;
    // 状态：0：禁用  1：启用
    private Integer status;


    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getBrandName() {
        return brandName;
    }

    public void setBrandName(String brandName) {
        this.brandName = brandName;
    }

    public String getCompanyName() {
        return companyName;
    }

    public void setCompanyName(String companyName) {
        this.companyName = companyName;
    }

    public Integer getOrdered() {
        return ordered;
    }

    public void setOrdered(Integer ordered) {
        this.ordered = ordered;
    }

    public String getDescription() {
        return description;
    }

    public void setDescription(String description) {
        this.description = description;
    }

    public Integer getStatus() {
        return status;
    }
    //逻辑视图
    public String getStatusStr(){
        if (status == null){
            return "未知";
        }
        return status == 0 ? "禁用":"启用";
    }

    public void setStatus(Integer status) {
        this.status = status;
    }

    @Override
    public String toString() {
        return "Brand{" +
                "id=" + id +
                ", brandName='" + brandName + '\'' +
                ", companyName='" + companyName + '\'' +
                ", ordered=" + ordered +
                ", description='" + description + '\'' +
                ", status=" + status +
                '}';
    }
}