MybatisPlus中的多表条件排序查询

		<dependency>
			<groupId>com.baomidou</groupId>
			<artifactId>mybatis-plus-boot-starter</artifactId>
			<version>3.0.7</version>
		</dependency>

@Data
@apiModel
public class SupLogUserVO
{
	@ApiModelProperty(value="日志ID")
	private Long id;
	@ApiModelProperty(value="用户ID")
	private Long userId;
	@ApiModelProperty(value="姓名")
	private String name;
	@ApiModelProperty(value="操作类型")
	private String operation;
	@ApiModelProperty(value="方法")
	private String method;
	@ApiModelProperty(value="参数")
	private String param;
	@ApiModelProperty(value="客户端类型")
    private String clientType;
	@ApiModelProperty(value="业务系统")
    private String sysId;
	@ApiModelProperty(value="ip")
    private String ip;
	@ApiModelProperty(value="创建时间")
	private LocalDateTime createTime;
	}

 IPage<SupLogUserVO> getSupLogUser(IPage<SupLogUserVO> page, @Param(Constants.WRAPPER) Wrapper<SupLogUserVO> queryWrapper);

<select id="getSupLogUser" resultType="bw.yth.svc.WEB.sysmng.vo.SupLogUserVO">
   select
	    l.id,l.user_id userId,u.`name`,l.operation,l.method,l.param,
	    l.client_type clientType,l.sys_id sysId,l.ip,l.create_time createTime 
   from 	sup_log l 
   LEFT JOIN 
   		sys_user u 
   on 		l.user_id = u.user_id
     ${ew.customSqlSegment}
</select>

public IPage<SupLogUserVO> getSupLogUser(String name, String six, String order, Integer curPage, Integer limit) {
		QueryWrapper<SupLogUserVO> wrapper = new QueryWrapper<SupLogUserVO>().like(StringUtils.isNotBlank(name), "name", name);
		wrapper = QueryUtil.addOrderBy(wrapper, six, null, order, null);
		Page<SupLogUserVO> page = QueryUtil.getPage(curPage, limit);
		return supLogDao.getSupLogUser(page, wrapper);
	}

import org.apache.commons.lang3.StringUtils;

import bw.common.util.BclSqlUtil;
import bw.yth.svc.base.AppConst;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;


public class QueryUtil
{
	
	public static String filterSql(String sql)
	{
		return BclSqlUtil.filterSql(sql, true);
	}

	
	public static <T> Page<T> getPage(Integer pageNo, Integer pageSize)
	{
		if(pageNo==null || pageNo<1)
			pageNo = 1;
		if(pageSize==null || pageSize<1 || pageSize>AppConst.Q_MAX_PER_PAGE)
			pageSize = AppConst.Q_DEFAULT_PER_PAGE;
		
		return new Page<T>(pageNo, pageSize);
	}

	
	public static <T> QueryWrapper<T> addOrderBy(QueryWrapper<T> wrapper, String orderField, String defOrderField, String orderType, String defOrderType)
	{
		boolean isAsc;
			//先判断排序方向
		isAsc = true;
		if( StringUtils.isBlank(orderType) )			//无指定值
		{
			if( AppConst.DESC.equalsIgnoreCase(defOrderType) )	//判断默认值
				isAsc = false;
		}
		else											//有指定值
		{
			if( AppConst.DESC.equalsIgnoreCase(orderType) )
				isAsc = false;
		}
			//再判断排序字段
		if( StringUtils.isBlank(orderField) )			//无指定值
		{
			if( !StringUtils.isBlank(defOrderField) )		//有默认值
				wrapper.orderBy(true, isAsc, QueryUtil.filterSql(defOrderField));
		}
		else											//有指定值
			wrapper.orderBy(true, isAsc, QueryUtil.filterSql(orderField));
		return wrapper;
	}
	
	public static <T> QueryWrapper<T> addOrderBy(QueryWrapper<T> wrapper, String orderField, String orderType)
	{
		return addOrderBy(wrapper, orderField, null, orderType, null);
	}	
	
	//待删除
	
	
	public static int[] getPageParam(Integer pageNo, Integer pageSize)
	{
		int[] result = new int[3];	
			//条数
		if(pageSize==null || pageSize<1)
			result[1] = 20;
		else if(pageSize > 200)
			result[1] = 200;
		else
			result[1] = pageSize;
			//开始索引
		if(pageNo==null || pageNo<1)
		{
			result[0] = 0;
			result[2] = 1;
		}
		else
		{
			result[0] = (pageNo-1)*result[1];
			result[2] = pageNo;
		}
		return result;
	}
}

public class AppConst
{
	//==== 查询相关的参数
	
	public static final int Q_MAX_RESULT			= 1000;
	
	public static final int Q_MAX_PER_PAGE			= 100;
	
	public static final int Q_DEFAULT_PER_PAGE		= 20;
	
	public static final int Q_MAX_EXPORT			= 5000;	
	//==== 其它
	public static final String ASC					= "ASC";
	public static final String DESC					= "DESC";
	public static final String PAGE					= "page";		//返回给前端的分页数据参数名
}

@GetMapping("/getList")
	@ApiOperation(value="查询用户列表", notes="")
	public CommonResponse<Object> getList(
			@ApiParam(name="name", value="名称(模糊匹配)，空表示不限。",defaultValue="超级") @RequestParam(required=false) String name,
			@ApiParam(name="curPage", value="开始页数",defaultValue="1") @RequestParam(required=false) Integer curPage,
			@ApiParam(name="limit", value="每页条数",defaultValue="5") @RequestParam(required=false) Integer limit,
			@ApiParam(name="six", value="排序字段",defaultValue="createTime") @RequestParam(required=false) String six,
			@ApiParam(name="order", value="排序方向",defaultValue="desc:降序，asc：升序") @RequestParam(required=false) String order
			)
	{
		CommonResponse<Object> resp = new CommonResponse<Object>();
		 //分页参数
		IPage<SupLogUserVO> resultPage = supLogService.getSupLogUser(name,six,order,curPage,limit);
		resp.aDDData("data", resultPage.getRecords());
		resp.addData("page", QueryPage.of(resultPage));
		return resp;
	}

DROP TABLE IF EXISTS `sys_user`;
CREATE TABLE `sys_user` (
  `user_id` int(11) NOT NULL AUTO_INCREMENT COMMENT '用户ID',
  `login_name` varchar(50) NOT NULL COMMENT '登录名',
  `passWord` varchar(100) NOT NULL COMMENT '登录密码 加密后的密码',
  `salt` varchar(50) NOT NULL COMMENT '加密用的盐',
  `type` int(11) NOT NULL DEFAULT '0' COMMENT '账户类别 999999=超级用户',
  `status` tinyint(4) NOT NULL DEFAULT '1' COMMENT '账户状态 ≤0=禁用（0=冻结），>0=正常',
  `check_status` tinyint(4) NOT NULL DEFAULT '1' COMMENT '审核状态 ≤0=待审核，>0=审核通过',
  `delete_flag` tinyint(4) NOT NULL DEFAULT '0' COMMENT '删除标志 0=未删除，1=已删除',
  `name` varchar(10) NOT NULL COMMENT '姓名',
  `sex` char(1) DEFAULT NULL COMMENT '性别 F=男，M=女',
  `birthday` datetime DEFAULT NULL COMMENT '生日',
  `id_card_num` varchar(50) DEFAULT NULL COMMENT '身份证号',
  `mobile_phone` varchar(50) DEFAULT NULL COMMENT '手机号',
  `email` varchar(50) DEFAULT NULL COMMENT '邮箱',
  `dept_id` int(11) NOT NULL DEFAULT '1' COMMENT '所属部门',
  `position` varchar(10) DEFAULT NULL COMMENT '职务',
  `memo` varchar(50) DEFAULT NULL COMMENT '备注',
  `create_user` int(11) DEFAULT NULL COMMENT '创建者 此记录的创建用户',
  `create_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
  PRIMARY KEY (`user_id`),
  UNIQUE KEY `login_name_UNI` (`login_name`)
) ENGINE=InnoDB AUTO_INCREMENT=15 DEFAULT CHARSET=utf8 COMMENT='用户';

DROP TABLE IF EXISTS `sup_log`;
CREATE TABLE `sup_log` (
  `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT 'ID',
  `user_id` bigint(20) NOT NULL COMMENT '用户ID',
  `operation` varchar(50) NOT NULL COMMENT '操作',
  `method` varchar(100) NOT NULL COMMENT '调用的方法',
  `param` varchar(500) DEFAULT NULL COMMENT '参数',
  `client_type` varchar(10) DEFAULT NULL COMMENT '客户端类型 见枚举定义',
  `sys_id` varchar(50) DEFAULT NULL COMMENT '访问的业务系统 见枚举定义',
  `ip` varchar(50) DEFAULT NULL COMMENT 'IP地址',
  `create_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=47 DEFAULT CHARSET=utf8 COMMENT='系统访问日志 记录访问日志（只记录管理相关日志，其它日志仅记录到日志文件）';