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SpringBoot树形结构查询 SpringBoot+MyBatisPlus+MySQL8实现树形结构查询

在奋斗的大道   2021-06-06 我要评论
想了解SpringBoot+MyBatisPlus+MySQL8实现树形结构查询的相关内容吗在奋斗的大道在本文为您仔细讲解SpringBoot树形结构查询的相关知识和一些Code实例欢迎阅读和指正我们先划重点:SpringBoot树形结构查询,SpringBoot树形查询,MySQL8查询下面大家一起来学习吧。

场景:

今天在实现权限功能模块时需要将查询的权限数据以树形结构的方式返回给前端。

功能实现:

第一步:权限表结构定义及其功能演示数据。

DROP TABLE IF EXISTS `baoan_privilege`;
CREATE TABLE `baoan_privilege`  (
  `id` varchar(64) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT '主键',
  `privilege_name` varchar(100) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '权限名称',
  `privilege_code` varchar(100) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '权限编码',
  `pid` varchar(64) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '父Id',
  `url` varchar(200) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '菜单路由',
  `order_rank` int(3) NULL DEFAULT NULL COMMENT '序号',
  `privilege_type` varchar(32) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '权限类型1:项目2菜单3按钮',
  `privilege_description` varchar(200) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '权限描述',
  `state` varchar(10) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT '2' COMMENT '状态(1:禁用,2:启用)',
  `created_by` varchar(32) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '创建人',
  `created_dt` datetime(0) NULL DEFAULT NULL COMMENT '创建时间',
  `version` int(9) NULL DEFAULT 1 COMMENT '版本号',
  `updated_by` varchar(32) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '更新人',
  `updated_dt` datetime(0) NULL DEFAULT NULL COMMENT '更新时间',
  `icon_name` int(15) NULL DEFAULT NULL COMMENT '图标名称',
  `delete_flag` int(1) NULL DEFAULT 1 COMMENT '删除标识(1:未删除2:已删除)',
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_general_ci COMMENT = '权限表' ROW_FORMAT = Dynamic;
 
-- ----------------------------
-- Records of baoan_privilege
-- ----------------------------
INSERT INTO `baoan_privilege` VALUES ('1', '首页', 'A', '0', NULL, NULL, '1', '首页', '2', NULL, NULL, 1, NULL, NULL, NULL, 1);
INSERT INTO `baoan_privilege` VALUES ('10', '通知管理', 'F_02', '6', NULL, NULL, '2', '通知管理', '2', NULL, NULL, 1, NULL, NULL, NULL, 1);
INSERT INTO `baoan_privilege` VALUES ('11', '操作日志', 'F_03', '6', NULL, NULL, '2', '操作日志', '2', NULL, NULL, 1, NULL, NULL, NULL, 1);
INSERT INTO `baoan_privilege` VALUES ('12', '角色管理', 'F_04', '6', NULL, NULL, '2', '角色管理', '2', NULL, NULL, 1, NULL, NULL, NULL, 1);
INSERT INTO `baoan_privilege` VALUES ('13', '存储管理', 'F_05', '6', NULL, NULL, '2', '存储管理', '2', NULL, NULL, 1, NULL, NULL, NULL, 1);
INSERT INTO `baoan_privilege` VALUES ('14', '权限管理', 'F_06', '6', NULL, NULL, '2', '权限管理', '2', NULL, NULL, 1, NULL, NULL, NULL, 1);
INSERT INTO `baoan_privilege` VALUES ('15', '新增', 'F_01_add', '9', NULL, NULL, '3', '管理员新增', '2', NULL, NULL, 1, NULL, NULL, NULL, 1);
INSERT INTO `baoan_privilege` VALUES ('16', '修改', 'F_01_update', '9', NULL, NULL, '3', '管理员修改', '2', NULL, NULL, 1, NULL, NULL, NULL, 1);
INSERT INTO `baoan_privilege` VALUES ('17', '查询', 'F_01_search', '9', NULL, NULL, '3', '管理员查询', '2', NULL, NULL, 1, NULL, NULL, NULL, 1);
INSERT INTO `baoan_privilege` VALUES ('18', '删除', 'F_01_delete', '9', NULL, NULL, '3', '管理员删除', '2', NULL, NULL, 1, NULL, NULL, NULL, 1);
INSERT INTO `baoan_privilege` VALUES ('19', '导出', 'F_01_export', '9', NULL, NULL, '3', '管理员导出', '2', NULL, NULL, 1, NULL, NULL, NULL, 1);
INSERT INTO `baoan_privilege` VALUES ('2', '用户管理', 'B', '0', NULL, NULL, '1', '用户管理', '2', NULL, NULL, 1, NULL, NULL, NULL, 1);
INSERT INTO `baoan_privilege` VALUES ('3', '商场管理', 'C', '0', NULL, NULL, '1', '商场管理', '2', NULL, NULL, 1, NULL, NULL, NULL, 1);
INSERT INTO `baoan_privilege` VALUES ('4', '商品管理', 'D', '0', NULL, NULL, '1', '商品管理', '2', NULL, NULL, 1, NULL, NULL, NULL, 1);
INSERT INTO `baoan_privilege` VALUES ('5', '推广管理', 'E', '0', NULL, NULL, '1', '推广管理', '2', NULL, NULL, 1, NULL, NULL, NULL, 1);
INSERT INTO `baoan_privilege` VALUES ('6', '系统管理', 'F', '0', NULL, NULL, '1', '系统管理', '2', NULL, NULL, 1, NULL, NULL, NULL, 1);
INSERT INTO `baoan_privilege` VALUES ('7', '配置管理', 'G', '0', NULL, NULL, '1', '配置管理', '2', NULL, NULL, 1, NULL, NULL, NULL, 1);
INSERT INTO `baoan_privilege` VALUES ('8', '统计报表', 'H', '0', NULL, NULL, '1', '统计报表', '2', NULL, NULL, 1, NULL, NULL, NULL, 1);
INSERT INTO `baoan_privilege` VALUES ('9', '管理员', 'F_01', '6', NULL, NULL, '2', '管理员', '2', NULL, NULL, 1, NULL, NULL, NULL, 1);

第二步:权限表实体定义及其拓展对象

基本对象

package com.zzg.entity;
 
import java.io.Serializable;
import java.util.Date;
 
import com.baomidou.mybatisplus.annotation.TableName;
 
import lombok.Data;
 
@SuppressWarnings("serial")
@TableName(value = "baoan_privilege")
@Data
public class BaoanPrivilege implements Serializable {
 private String id;
 
    private String privilegeName;
 
    private String privilegeCode;
 
    private String pid;
 
    private String url;
 
    private Integer orderRank;
 
    private String privilegeType;
 
    private String privilegeDescription;
 
    private String state;
 
    private String createdBy;
 
    private Date createdDt;
 
    private Integer version;
 
    private String updatedBy;
 
    private Date updatedDt;
 
    private Integer iconName;
 
    private Integer deleteFlag;
}

拓展对象

package com.zzg.vo;
 
import java.util.List;
 
import com.zzg.entity.BaoanPrivilege;
 
import lombok.Data;
 
@SuppressWarnings("serial")
@Data
public class BaoanPrivilegeVo  extends BaoanPrivilege {
 
 private List<BaoanPrivilege> children;
}

第三步:权限表Mapper 定义

mapper 接口定义

package com.zzg.mapper;
 
import java.util.List;
import java.util.Map;
 
import org.apache.ibatis.annotations.Param;
 
import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.zzg.entity.BaoanPrivilege;
import com.zzg.vo.BaoanPrivilegeVo;
 
public interface BaoanPrivilegeMapper extends BaseMapper<BaoanPrivilege> {
 List<BaoanPrivilegeVo> selectList(Map<String, Object> parameter);
 
 IPage<BaoanPrivilegeVo> selectPage(Page page, @Param("vo")Map<String, Object> parameter);
}

mapper.xml 文件定义

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.zzg.mapper.BaoanPrivilegeMapper">
  <resultMap id="BaseResultMap" type="com.zzg.entity.BaoanPrivilege">
    <id column="id" jdbcType="VARCHAR" property="id" />
    <result column="privilege_name" jdbcType="VARCHAR" property="privilegeName" />
    <result column="privilege_code" jdbcType="VARCHAR" property="privilegeCode" />
    <result column="pid" jdbcType="VARCHAR" property="pid" />
    <result column="url" jdbcType="VARCHAR" property="url" />
    <result column="order_rank" jdbcType="INTEGER" property="orderRank" />
    <result column="privilege_type" jdbcType="VARCHAR" property="privilegeType" />
    <result column="privilege_description" jdbcType="VARCHAR" property="privilegeDescription" />
    <result column="state" jdbcType="VARCHAR" property="state" />
    <result column="created_by" jdbcType="VARCHAR" property="createdBy" />
    <result column="created_dt" jdbcType="TIMESTAMP" property="createdDt" />
    <result column="version" jdbcType="INTEGER" property="version" />
    <result column="updated_by" jdbcType="VARCHAR" property="updatedBy" />
    <result column="updated_dt" jdbcType="TIMESTAMP" property="updatedDt" />
    <result column="icon_name" jdbcType="INTEGER" property="iconName" />
    <result column="delete_flag" jdbcType="INTEGER" property="deleteFlag" />
  </resultMap>
  
  <resultMap id="BaseResultMapVo" type="com.zzg.vo.BaoanPrivilegeVo" extends="BaseResultMap">
   <collection column="id" property="children" javaType="java.util.ArrayList"
ofType="com.zzg.entity.BaoanPrivilege" select="getNextNodeTree"/>
  </resultMap>
  
  <sql id="Base_Column_List">
    id, privilege_name, privilege_code, pid, url, order_rank, privilege_type, privilege_description, 
    state, created_by, created_dt, version, updated_by, updated_dt, icon_name, delete_flag
  </sql>
  
  <sql id="condition">
   <if test="privilegeType != null and privilegeType != '' ">
    and baoan_privilege.privilege_type = #{privilegeType}
   </if>
   <if test="pid != null and pid != '' ">
    and baoan_privilege.pid = #{pid}
   </if>
  </sql>
  
  <sql id="conditionVo">
   <if test="vo.privilegeType != null and vo.privilegeType != '' ">
    and baoan_privilege.privilege_type = #{vo.privilegeType}
   </if>
   <if test="vo.pid != null and vo.pid != '' ">
    and baoan_privilege.pid = #{vo.pid}
   </if>
  </sql>
  
  <select id="getNextNodeTree" resultMap="BaseResultMapVo">
 SELECT
  <include refid="Base_Column_List"/>
 FROM baoan_privilege
 WHERE pid = #{id}
 </select>
 
 <select id="selectList" parameterType="map" resultMap="BaseResultMapVo">
    select
  <include refid="Base_Column_List"></include>
    FROM baoan_privilege
    WHERE 1 = 1 
    <include refid="condition"></include>
  </select>
  <select id="selectPage" parameterType="map" resultMap="BaseResultMapVo">
    select
  <include refid="Base_Column_List"></include>
    FROM baoan_privilege
    WHERE 1 = 1 
    <include refid="conditionVo"></include>
  </select>
</mapper>

第三步:权限表Service 定义

package com.zzg.service;
 
import java.util.List;
import java.util.Map;
 
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.IService;
import com.zzg.entity.BaoanPrivilege;
import com.zzg.vo.BaoanPrivilegeVo;
 
public interface BaoanPrivilegeService extends IService<BaoanPrivilege> {
 List<BaoanPrivilegeVo> selectList(Map<String, Object> parameter);
 
 IPage<BaoanPrivilegeVo> selectPage(Page<BaoanPrivilegeVo> page, Map<String, Object> parameter);
}
package com.zzg.service.impl;
 
import java.util.List;
import java.util.Map;
 
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
 
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.zzg.entity.BaoanPrivilege;
import com.zzg.mapper.BaoanPrivilegeMapper;
import com.zzg.service.BaoanPrivilegeService;
import com.zzg.vo.BaoanPrivilegeVo;
 
@Service
public class BaoanPrivilegeServiceImpl extends ServiceImpl<BaoanPrivilegeMapper, BaoanPrivilege> implements BaoanPrivilegeService {
 @Autowired
 private BaoanPrivilegeMapper mapper;
 
 @Override
 public List<BaoanPrivilegeVo> selectList(Map<String, Object> parameter) {
  // TODO Auto-generated method stub
  return mapper.selectList(parameter);
 }
 
 @Override
 public IPage<BaoanPrivilegeVo> selectPage(Page<BaoanPrivilegeVo> page, Map<String, Object> parameter) {
  // TODO Auto-generated method stub
  return mapper.selectPage(page, parameter);
 }
 
}

第四步:controller 层接口对外提供服务

 // 查
 @ApiOperation(httpMethod = "POST", value = "基于分页查询符合条件权限记录")
 @RequestMapping(value = "/getPage", method = { RequestMethod.POST })
 @ApiImplicitParams({
   @ApiImplicitParam(name = "username", value = "管理员名称", required = false, dataType = "String", paramType = "query") })
 public Result getPage(@RequestBody Map<String, Object> parame) {
  // 动态构建添加参数
//  QueryWrapper<BaoanPrivilegeVo> query = new QueryWrapper<BaoanPrivilegeVo>();
//  this.buildQuery(parame, query);
 
  PageParame pageParame = this.initPageBounds(parame);
  Page<BaoanPrivilegeVo> page = new Page<BaoanPrivilegeVo>(pageParame.getPage(), pageParame.getLimit());
  IPage<BaoanPrivilegeVo> list = baoanPrivilegeService.selectPage(page, parame);
  return Result.ok().setDatas(list);
 }

前端效果展示:


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