SpringBoot+MyBatisPlus+MySQL8实现树形结构查询
作者：在奋斗的大道
这篇文章主要为大家详细介绍了SpringBoot+MyBatisPlus+MySQL8实现树形结构查询，文中示例代码介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们可以参考一下
本文实例为大家分享了SpringBoot+MyBatisPlus+MySQL8实现树形结构查询，供大家参考，具体内容如下
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:
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。