一次性加载树结构数据表 mapper加载

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@Override
public List<Organization> getOrganizationTree() throws UnionException {//缓存有就从缓存拿List<Organization> redisObjectOrganizationList = (List<Organization>) redisObjectUtil2.getListObject(assembleRedisKeyOrganizationTree() );if(!CollectionUtils.isEmpty(redisObjectOrganizationList)){return redisObjectOrganizationList;}List<Organization> organizationTreeList = new ArrayList<>();Organization organizationTree = new Organization();List<Organization> allOrganization = getOrganizationAndChildrenById(0L);//目录无限制for (Organization organizationItem : allOrganization) {//第一层if (organizationItem.getPid().equals(0L)) {organizationTree = organizationItem;organizationTree.setOrganizationTreeList(this.getSonOrganizationList(organizationItem.getId(),allOrganization));organizationTreeList.add(organizationTree);}}//数据库查询出来  设置到缓存当中redisObjectUtil2.setListObject(assembleRedisKeyOrganizationTree() ,organizationTreeList);return organizationTreeList;
}private List<Organization> getSonOrganizationList(Long id ,List<Organization> allOrganization) {List<Organization> listvo = new ArrayList<>();for (Organization organizationItem : allOrganization) {//找到父级相同的下级if (organizationItem.getPid().equals(id)) {listvo.add(organizationItem);}}if(!CollectionUtils.isEmpty(listvo)){for(Organization vo:listvo){vo.setOrganizationTreeList(getSonOrganizationList(vo.getId(),allOrganization));}}return listvo;
}

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@Data
@ApiModel(value = "组织机构信息")
public class Organization implements Serializable {@ApiModelProperty(name = "主键id")@JSONField(serializeUsing = ToStringSerializer.class)private Long id;@ApiModelProperty(name = "父主键id")@JSONField(serializeUsing = ToStringSerializer.class)private Long pid;@ApiModelProperty(name = "组织编号")private String code;@ApiModelProperty(name = "组织名称",notes = "长度100",required = true)@NotEmpty@Length(min = 1,max = 100)private String name;@ApiModelProperty(name = "排名")private Integer rank1;@ApiModelProperty(name = "是否有效")@Length(min = 1,max = 1)private String isEnable;@ApiModelProperty(name = "是否删除")@Length(min = 1,max = 1)private String isDeleted;@ApiModelProperty(name = "创建时间")private Date createTime;@ApiModelProperty(name = "更新时间")private Date updateTime;private List<Organization> organizationTreeList;/***      重写equals 和hashcode方法*      alt+insert   之选择id就好了  只要id重复就是重复*/@Overridepublic boolean equals(Object o) {if (this == o) return true;if (o == null || getClass() != o.getClass()) return false;Organization that = (Organization) o;return id.equals(that.id);}@Overridepublic int hashCode() {return Objects.hash(id);}}

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java 一次查询数据库生成树形结构

2019-01-29 00:36:05 suhongliang 阅读数 425更多

分类专栏： IT管理

本文链接：https://blog.csdn.net/suhongliang/article/details/86684787

@Override
public ResultObj getMenu() throws Exception {MenuDomain resultMenuDomain = new MenuDomain();List<MenuDomain> allMenu = menuDao.getMenu();//目录无限制for (MenuDomain menuItem : allMenu) {//第一层if (menuItem.getPid() == 0) {resultMenuDomain = menuItem;resultMenuDomain.setList(this.getSonMenuList(menuItem.getId(),allMenu));}}ResultObj resultObj = new ResultObj();return resultObj;
}private List<MenuDomain> getSonMenuList(Integer id ,List<MenuDomain> allMenu) {List<MenuDomain> listvo = new ArrayList<>();for (MenuDomain menuItem : allMenu) {if (menuItem.getPid() == id) {//找到父级相同的下级listvo.add(menuItem);}}if(listvo.size() > 0){for(MenuDomain vo:listvo){vo.setList(getSonMenuList(vo.getId(),allMenu));}}return listvo;
}

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