tree_0">以树-tree的形式返回数据

—后台

java">实体类：
import com.baomidou.mybatisplus.annotation.TableField;
import com.baomidou.mybatisplus.annotation.TableId;
import com.baomidou.mybatisplus.annotation.TableName;
import lombok.Data;

import java.io.Serializable;
import java.util.Date;
import java.util.List;

/**
 * @author Administrator
 */
@Data
@TableName("sys_org")
public class SysOrgEntity implements Serializable {
    private static final long serialVersionUID = 1L;

    /**
     * 组织id
     */
    @TableId
    private Long orgId;

    /**
     * 组织名称
     */
    private String name;

    /**
     * 组织父id
     */
    private Long parentId;

    /**
     * 父菜单名称
     */
    @TableField(exist=false)
    private String parentName;

    /**
     * 组织编号
     */
    private String orgNum;

    /**
     * 组织负责人
     */
    private String orgLeader;

    /**
     * 手机号
     */
    private String phone;

    /**
     * 创建人名称
     */
    private String createUser;

    /**
     * 修改人名称
     */
    private String updateUser;

    /**
     * 创建时间
     */
    private Date createTime;

    /**
     * 修改时间
     */
    private Date updateTime;

    /**
     * 组织备注
     */
    private String orgRemark;

    /**
     * ztree属性
     */
    @TableField(exist=false)
    private Boolean open;

    @TableField(exist=false)
    private List<?> list;
}

java">业务类
 /**
     * 获取树的组织
     * @return
     */
    List<SysOrgEntity> getTreeList();

java">业务层实现类
 @Override
    public List<SysOrgEntity> getTreeList() {
        List<SysOrgEntity> list = this.list();
        if (list == null || list.size() <= 0){
            return null;
        }
        LinkedList<SysOrgEntity> linkedList = new LinkedList<>();
        list.forEach(orgEntity -> {
            if (orgEntity.getParentId() == 0){
                linkedList.add(orgEntity);
            }
        });
        linkedList.forEach(orgEntity -> {
            orgEntity.setList(getChildren(orgEntity.getOrgId(),list));
        });
        return linkedList;
    }
 private List<SysOrgEntity> getChildren(Long parentId, List<SysOrgEntity> orgList){
        //孩子集合
        LinkedList<SysOrgEntity> linkedList = new LinkedList<>();
        orgList.forEach(orgEntity -> {
            if (parentId.equals(orgEntity.getParentId())){
                linkedList.add(orgEntity);
            }
        });
        // 递归退出条件
        if (linkedList.size() == 0){
            return null;
        }
        // 把子菜单的子菜单再递归循环一遍
        linkedList.forEach(orgEntity -> {
            orgEntity.setList(getChildren(orgEntity.getOrgId(),orgList));
        });
        return linkedList;
    }

javascript">前台---级联
  <el-form-item placeholder="学院名称">
        <el-cascader expand-trigger="hover" :options="options" :props="defaultParams" change-on-select v-model="selectedOptions"
          @change="handleMenu" ref="cascaderMenu" change-on-select :show-all-levels="false" clearable>
        </el-cascader>
  </el-form-item>

javascript">export default {
    data() {
      return {
        defaultParams: {
          label: 'name',
          value: 'orgId',
          children: 'list'
        },
        options: [],
        selectedOptions: [],
        selectedOrgId: ''
      }
    },
    handleMenu() {
        this.selectedOrgId = this.$refs['cascaderMenu'].currentValue
        console.log(this.selectedOrgId)
      },
      mounted: function() {
      // 调用方法获取所有数据
      this.getOrgList()
    },
    getOrgList() {
        this.$http({
          url: this.$http.adornUrl('/sys/org/tree'),
          method: 'get',
          params: this.$http.adornParams()
        }).then(({
          data
        }) => {
          this.options = data
        })
      }