汽车4s网站设计,做外贸是不是要有网站,做网站ps的图片,星辰博客wordpress一、需求背景 需要给一份问卷进行授权#xff0c;授权的角色固定为4类#xff0c;分别是#xff1a; 农户、企业、金融机构、政府用户#xff0c;这4类角色定义在字典里面#xff0c;并且很少改动。这4类角色下面#xff0c;可能有多个角色#xff0c;这些角色通过字典的…一、需求背景 需要给一份问卷进行授权授权的角色固定为4类分别是 农户、企业、金融机构、政府用户这4类角色定义在字典里面并且很少改动。这4类角色下面可能有多个角色这些角色通过字典的key关联到上述4个类型中的一个; 在新增、编辑问卷的时候需要把这4类所有的角色都展示出来供管理员选择。
二、需求分析 由于涉及到的数据很少改动且主要以查询为主于是第一想法就是通过 枚举链对实现,具体实现如下:
三、实现过程
1. 枚举类
import lombok.Getter;
import lombok.Setter;import java.util.*;
import java.util.concurrent.ConcurrentHashMap;
import java.util.function.Consumer;
import java.util.stream.Stream;import static com.xxx.xxx.utils.StreamUtil.forEachIfPresent;/*** Author: wxz* Date: 2023.11.29 10:35* Description: 问卷调查授权枚举*/
public enum PaperAuthorRoleEnum {ANONYMITY(un-limit, 不限, Collections.singletonList()),AGRICULTURAL(member, 农户,Collections.singletonList(member)),ENTERPRISE(enterprises, 企业, Collections.singletonList(agricultural-enterprises)),FINANCIAL_INSTITUTION(finance, 金融机构,FinanceRoleKeys()),GOVERNMENT_USERS(government, 政府用户, GovernmentRoleKeys()),;/*** 角色类型*/Getterprivate final String type;/*** 角色类型名称*/Getterprivate final String typeName;/*** 角色id集合*/Getterprivate final ListString roleKeys;/*** 角色列表*/Getterprivate final ListPaperRole paperRoleList;/*** 角色缓存数据*/private static MapString, SysRole roleCache new ConcurrentHashMap();PaperAuthorRoleEnum(String type, String typeName, ListString roleKeys) {this.type type;this.typeName typeName;this.roleKeys roleKeys;this.paperRoleList getRolesFromCache(roleKeys);}/*** 根据角色类型查找枚举* param type 角色类型* return 类型枚举*/public static PaperAuthorRoleEnum of(String type) {if (type null) {return null;}PaperAuthorRoleEnum[] values PaperAuthorRoleEnum.values();for (PaperAuthorRoleEnum a : values) {if (a.type.equals(type)) {return a;}}return null;}/*** 金融机构角色keys*/private static ListString FinanceRoleKeys() {ListString list new ArrayList();//银行机构有5个等级for (int i 1; i 5; i) {list.add(bank_level_ i);}return list;}/*** 政府角色keys*/private static ListString GovernmentRoleKeys() {return new ArrayList(Arrays.asList(collector,government,government-role));}/*** 获取所有枚举的keys* return*/private ListString getAllRolKeys() {ListString roleKeys new ArrayList();roleKeys.addAll(Collections.singletonList(member));roleKeys.addAll(Collections.singletonList(agricultural-enterprises));roleKeys.addAll(FinanceRoleKeys());roleKeys.addAll(GovernmentRoleKeys());return roleKeys;}/*** 从缓存中获取角色列表* param roleKeys* return*/private ListPaperRole getRolesFromCache(ListString roleKeys) {ListPaperRole paperRoles new ArrayList();SetString notExitKeys new HashSet();boolean sign (roleCache null);//如果已经存在缓存里面,则优先从缓存里面获取if (sign) {notExitKeys.addAll(getAllRolKeys());roleCache new ConcurrentHashMap();} else {roleKeys.forEach(key - {if (!roleCache.containsKey(key)) {notExitKeys.add(key);} else {PaperRole paperRole new PaperRole().setRoleId(roleCache.get(key).getRoleId()).setRoleName(roleCache.get(key).getRoleName());paperRoles.add(paperRole);}});}//不存在于缓存的数据,重新从数据库里面查询出来,放在缓存里面if (notExitKeys.size() 0) {OptionalListSysRole sysRoles Optional.ofNullable(SpringUtils.getBean(SysRoleMapper.class).selectListByRoleKeys(new ArrayList(notExitKeys)));// forEachIfPresent()方法参考: https://blog.csdn.net/qq_37844454/article/details/134964619forEachIfPresent(sysRoles,item-{roleCache.put(item.getRoleKey(), item);PaperRole paperRole new PaperRole().setRoleId(item.getRoleId()).setRoleName(item.getRoleName());paperRoles.add(paperRole);});}return paperRoles;}/*** 获取所有的枚举*/public static PaperAuthorRoleEnum[] getValues() {return new PaperAuthorRoleEnum[]{AGRICULTURAL, ENTERPRISE, FINANCIAL_INSTITUTION, GOVERNMENT_USERS};}
}2. 控制器调用 //使用线程安装的链对做缓存,避免读多写少的数据频繁请求数据库private static ConcurrentLinkedQueuePaperAuthorTypeDTO dtoQueue new ConcurrentLinkedQueue();GetMapping(value /getRoleList)public AjaxResult getRoleList() {if (CollectionUtils.isEmpty(dtoQueue)) {dtoQueue new ConcurrentLinkedQueue();Arrays.stream(PaperAuthorRoleEnum.getValues()).forEach(anEnum-{dtoQueue.offer(new PaperAuthorTypeDTO().setRoleId(anEnum.getType()).setRoleName(anEnum.getTypeName()));});}return AjaxResult.success(dtoQueue);}
