公共下拉选/树
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<artifactId>hutool-all</artifactId>
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<version>5.3.2</version>
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</dependency>
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<dependency>
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<groupId>com.securitycontrol</groupId>
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<artifactId>securitycontrol-commons-entity</artifactId>
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</dependency>
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</dependencies>
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package com.securitycontrol.common.core.utils;
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import com.securitycontrol.entity.system.vo.TreeNode;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.Objects;
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/**
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* @author：cwchen
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* @date：2024-02-22-9:46
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* @version：1.0
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* @description：下拉树-工具类
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*/
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public class TreeBuild {
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public List<TreeNode> nodeList = new ArrayList<>();
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/**
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* 构造方法
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* @param nodeList 将数据集合赋值给nodeList，即所有数据作为所有节点。
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*/
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public TreeBuild(List<TreeNode> nodeList){
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this.nodeList = nodeList;
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}
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/**
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* 获取需构建的所有根节点（顶级节点） "0"
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* @return 所有根节点List集合
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*/
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public List<TreeNode> getRootNode(){
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// 保存所有根节点（所有根节点的数据）
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List<TreeNode> rootNodeList = new ArrayList<>();
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// treeNode：查询出的每一条数据（节点）
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for (TreeNode treeNode : nodeList){
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// 判断当前节点是否为根节点，此处注意：若parentId类型是String，则要采用equals()方法判断。
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if (0 == treeNode.getParentId()) {
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// 是，添加
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rootNodeList.add(treeNode);
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}
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}
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return rootNodeList;
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}
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/**
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* 根据每一个顶级节点（根节点）进行构建树形结构
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* @return 构建整棵树
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*/
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public List<TreeNode> buildTree(){
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// treeNodes：保存一个顶级节点所构建出来的完整树形
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List<TreeNode> treeNodes = new ArrayList<TreeNode>();
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// getRootNode()：获取所有的根节点
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for (TreeNode treeRootNode : getRootNode()) {
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// 将顶级节点进行构建子树
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treeRootNode = buildChildTree(treeRootNode);
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// 完成一个顶级节点所构建的树形，增加进来
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treeNodes.add(treeRootNode);
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}
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return treeNodes;
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}
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/**
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* 递归-----构建子树形结构
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* @param pNode 根节点（顶级节点）
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* @return 整棵树
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*/
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public TreeNode buildChildTree(TreeNode pNode){
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List<TreeNode> childTree = new ArrayList<TreeNode>();
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// nodeList：所有节点集合（所有数据）
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for (TreeNode treeNode : nodeList) {
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// 判断当前节点的父节点ID是否等于根节点的ID，即当前节点为其下的子节点
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if (Objects.equals(treeNode.getParentId(),pNode.getId())) {
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// 再递归进行判断当前节点的情况，调用自身方法
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childTree.add(buildChildTree(treeNode));
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}
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}
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// for循环结束，即节点下没有任何节点，树形构建结束，设置树结果
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pNode.setChildren(childTree);
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return pNode;
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}
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}
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package com.securitycontrol.entity.system.dto;
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import io.swagger.annotations.ApiModelProperty;
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import lombok.Data;
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/**
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* @author：cwchen
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* @date：2024-02-22-9:42
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* @version：1.0
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* @description：下拉选-dto
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*/
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@Data
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public class SelectDto {
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@ApiModelProperty(value = "参数")
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private String param;
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}
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package com.securitycontrol.entity.system.vo;
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import io.swagger.annotations.ApiModelProperty;
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import lombok.Data;
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/**
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* @author：cwchen
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* @date：2024-02-22-9:41
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* @version：1.0
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* @description：下拉选-vo
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*/
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@Data
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public class SelectVo {
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@ApiModelProperty(value = "id")
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private Integer id;
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@ApiModelProperty(value = "名称")
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private String name;
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}
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package com.securitycontrol.entity.system.vo;
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import com.fasterxml.jackson.annotation.JsonInclude;
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import io.swagger.annotations.ApiModelProperty;
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import lombok.Data;
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import java.util.ArrayList;
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import java.util.List;
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/**
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* @author：cwchen
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* @date：2024-02-22-9:31
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* @version：1.0
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* @description：下拉树-vo
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*/
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@Data
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public class TreeNode {
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@ApiModelProperty(value = "id")
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private Integer id;
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@ApiModelProperty(value = "名称")
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private String label;
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@ApiModelProperty(value = "父ID")
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private Integer parentId;
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@ApiModelProperty(value = "层级")
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@JsonInclude(JsonInclude.Include.NON_EMPTY)
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private String level;
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@ApiModelProperty(value = "子节点")
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@JsonInclude(JsonInclude.Include.NON_EMPTY)
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private List<TreeNode> children = new ArrayList<>();
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}
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package com.securitycontrol.system.base.controller;
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import com.securitycontrol.common.core.web.controller.BaseController;
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import com.securitycontrol.common.core.web.domain.AjaxResult;
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import com.securitycontrol.system.base.service.ISelectService;
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import io.swagger.annotations.ApiOperation;
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import org.springframework.web.bind.annotation.PostMapping;
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import org.springframework.web.bind.annotation.RequestBody;
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import org.springframework.web.bind.annotation.RequestMapping;
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import org.springframework.web.bind.annotation.RestController;
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import javax.annotation.Resource;
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/**
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* @author：cwchen
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* @date：2024-02-21-18:25
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* @version：1.0
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* @description：公共下拉选/树
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*/
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@RestController
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@RequestMapping("/sys/select/")
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public class SelectController extends BaseController {
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@Resource(name = "ISelectService")
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private ISelectService service;
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@ApiOperation(value = "组织机构树")
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@PostMapping("getOrgTree")
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public AjaxResult getOrgTree(){
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return service.getOrgTree();
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}
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}
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package com.securitycontrol.system.base.mapper;
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import com.securitycontrol.entity.system.vo.TreeNode;
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import org.springframework.stereotype.Repository;
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import java.util.List;
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/**
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* @author：cwchen
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* @date：2024-02-22-9:37
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* @version：1.0
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* @description：公共下拉选/树-数据库访问层
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*/
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@Repository(value = "ISelectMapper")
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public interface ISelectMapper {
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/**
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* 组织机构树
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* @return List<TreeNode>
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* @description 组织机构树
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* @author cwchen
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* @date 2024/2/22 9:51
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*/
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List<TreeNode> getOrgTree();
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}
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package com.securitycontrol.system.base.service;
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import com.securitycontrol.common.core.web.domain.AjaxResult;
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/**
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* @author：cwchen
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* @date：2024-02-22-9:35
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* @version：1.0
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* @description：公共下拉选/树-业务层
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*/
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public interface ISelectService {
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/**
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* 组织机构树
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* @return AjaxResult
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* @description 组织机构树
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* @author cwchen
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* @date 2024/2/22 9:44
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*/
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AjaxResult getOrgTree();
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}
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package com.securitycontrol.system.base.service.impl;
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import com.securitycontrol.common.core.utils.TreeBuild;
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import com.securitycontrol.common.core.web.domain.AjaxResult;
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import com.securitycontrol.entity.system.vo.TreeNode;
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import com.securitycontrol.system.base.mapper.ISelectMapper;
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import com.securitycontrol.system.base.service.ISelectService;
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import lombok.extern.slf4j.Slf4j;
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import org.apache.commons.collections4.CollectionUtils;
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import org.springframework.stereotype.Service;
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import javax.annotation.Resource;
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import java.util.ArrayList;
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import java.util.List;
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/**
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* @author：cwchen
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* @date：2024-02-22-9:37
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* @version：1.0
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* @description：公共下拉选/树-业务层逻辑层
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*/
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@Service(value = "ISelectService")
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@Slf4j
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public class ISelectServiceImpl implements ISelectService {
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@Resource(name = "ISelectMapper")
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private ISelectMapper mapper;
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@Override
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public AjaxResult getOrgTree() {
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List<TreeNode> groupList = new ArrayList<>();
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List<TreeNode> list = new ArrayList<>();
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try {
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list = mapper.getOrgTree();
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if (CollectionUtils.isNotEmpty(list)) {
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// 创建树形结构（数据集合作为参数）
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TreeBuild treeBuild = new TreeBuild(list);
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// 原查询结果转换树形结构
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groupList = treeBuild.buildTree();
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}
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} catch (Exception e) {
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log.error("组织机构树-查询失败", e);
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}
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return AjaxResult.success(groupList);
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}
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}
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<?xml version="1.0" encoding="UTF-8" ?>
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<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
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<mapper namespace="com.securitycontrol.system.base.mapper.ISelectMapper">
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<!--组织机构树-->
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<select id="getOrgTree" resultType="com.securitycontrol.entity.system.vo.TreeNode">
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SELECT dict_id AS id,
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p_code AS parentId,
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dict_value AS label
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FROM sys_dict
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WHERE del_flag = '0'
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</select>
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</mapper>
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