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@Override public List<Organization> getOrganizationTree() throws UnionException {//緩存有就從緩存拿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);//目錄無限制for (Organization organizationItem : allOrganization) {//第一層if (organizationItem.getPid().equals(0L)) {organizationTree = organizationItem;organizationTree.setOrganizationTreeList(this.getSonOrganizationList(organizationItem.getId(),allOrganization));organizationTreeList.add(organizationTree);}}//數(shù)據(jù)庫查詢出來 設(shè)置到緩存當(dāng)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) {//找到父級(jí)相同的下級(jí)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 = "組織機(jī)構(gòu)信息") public class Organization implements Serializable {@ApiModelProperty(name = "主鍵id")@JSONField(serializeUsing = ToStringSerializer.class)private Long id;@ApiModelProperty(name = "父主鍵id")@JSONField(serializeUsing = ToStringSerializer.class)private Long pid;@ApiModelProperty(name = "組織編號(hào)")private String code;@ApiModelProperty(name = "組織名稱",notes = "長度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 = "是否刪除")@Length(min = 1,max = 1)private String isDeleted;@ApiModelProperty(name = "創(chuàng)建時(shí)間")private Date createTime;@ApiModelProperty(name = "更新時(shí)間")private Date updateTime;private List<Organization> organizationTreeList;/*** 重寫equals 和hashcode方法* alt+insert 之選擇id就好了 只要id重復(fù)就是重復(fù)*/@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 一次查詢數(shù)據(jù)庫生成樹形結(jié)構(gòu)

2019-01-29 00:36:05?suhongliang?閱讀數(shù) 425更多

分類專欄：?IT管理

版權(quán)聲明：本文為博主原創(chuàng)文章，遵循?CC 4.0 BY-SA?版權(quán)協(xié)議，轉(zhuǎn)載請(qǐng)附上原文出處鏈接和本聲明。

本文鏈接：https://blog.csdn.net/suhongliang/article/details/86684787

@Override public ResultObj getMenu() throws Exception {MenuDomain resultMenuDomain = new MenuDomain();List<MenuDomain> allMenu = menuDao.getMenu();//目錄無限制for (MenuDomain menuItem : allMenu) {//第一層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) {//找到父級(jí)相同的下級(jí)listvo.add(menuItem);}}if(listvo.size() > 0){for(MenuDomain vo:listvo){vo.setList(getSonMenuList(vo.getId(),allMenu));}}return listvo; }

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