Parameter ‘ew’ not found. Available parameters are [wrapper, page, param1, param2]

源码

Impl类

@Override
public IPage<Vehicle> getVehiclePageList(Query query, VehicleVo vo) {   
    QueryWrapper<Vehicle> wrapper = new QueryWrapper();    wrapper.like("plate_no", vo.getPlateNo()); 
    wrapper.orderByAsc("create_time");  
    IPage<Vehicle> page = Condition.getPage(query); 
    return baseMapper.pageList(page, wrapper);
}

Mapper

IPage<Vehicle> pageList(IPage<Vehicle> page, @Param(Constants.WRAPPER) QueryWrapper<Vehicle> wrapper);

xml

<?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="你的XXXMapper.xml所在位置包名">    
        <select id="pageList" resultType="你的 XXXMapper.java所在位置包名">           
            SELECT *  FROM vehicle v            
            JOIN vs_vehicle_information vvi ON v.id=vvi.veh_ship_id   
            ${ew.customSqlSegment}   
        </select>
    </mapper>

报错点 Parameter ‘ew’ not found. Available parameters are [wrapper, page, param1, param2]

@Param 导错包了

正确包地址：import org.apache.ibatis.annotations.Param;

这个千万不能错。不注意的时候，死活找不到问题的原因。开发中细心可以省去很多找 bug 的时间。