Lombok - 快速入门 & 实战

• 一般不推荐使用@Data注解，用到什么就加什么比较好。

package com.mmall.pojo;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.EqualsAndHashCode;
import lombok.Getter;
import lombok.NoArgsConstructor;
import lombok.Setter;
import lombok.ToString;
import java.util.Date;

@Getter
@Setter
@NoArgsConstructor
@AllArgsConstructor
@EqualsAndHashCode(of = "id")
@ToString(exclude = "parentId")
public class Category {
    private Integer id;

    private Integer parentId;

    private String name;

    private Boolean status;

    private Integer sortOrder;

    private Date createTime;

    private Date updateTime;

}      

package com.mmall.service.impl;

import com.google.common.collect.Lists;
import com.google.common.collect.Sets;
import com.mmall.common.ServerResponse;
import com.mmall.dao.CategoryMapper;
import com.mmall.pojo.Category;
import com.mmall.service.ICategoryService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.collections.CollectionUtils;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
import java.util.Set;

@Service("iCategoryService")
@Slf4j
public class CategoryServiceImpl implements ICategoryService {
    // ......
    public ServerResponse<List<Category>> getChildrenParallelCategory(Integer categoryId){
        List<Category> categoryList = categoryMapper.selectCategoryChildrenByParentId(categoryId);
        if(CollectionUtils.isEmpty(categoryList)){
            log.info("未找到当前分类的子分类"); // 这里用 log
        }
        return ServerResponse.createBySuccess(categoryList);
    }
    // ......
}