不管我怎么弄，有且只有一條，而且是最后一條。。。實(shí)體類(lèi)Users中有屬性cardId，為主鍵，是實(shí)體類(lèi)RealEstate的外鍵，RealState中有1對(duì)多關(guān)系屬性private Users user；dao接口和映射文件代碼：public?interface?RealEstateMapper?{ @MapKey("users") public?Map<Users,RealEstate>?getReListByUsers(Users?users); @MapKey("id") public?Map<Integer,RealEstate>?getReListById(Integer?Id); public?Integer?insertRes(RealEstate?realEstate); public?Integer?deleteRes(RealEstate?realEstate); public?Integer?updateRes(RealEstate?realEstate); }<?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="dao.RealEstateMapper"> <select?id="getReListById"?resultType="RealEstate"?parameterType="RealEstate"> select?*?from?real_estate?where?id=#{id} </select> <select?id="getReListByUsers"?resultType="RealEstate"?parameterType="Users"> select?*?from?real_estate?where?cardId=#{cardId} </select> <select?id="insertRes"?parameterType="RealEstate"> insert?into?real_estate(id,cardId,projectName,address,houseType,area,buildTime)?values( #{id},#{cardId},#{projectName},#{address},#{houseType},#{area},#{buildTime} ) </select> <select?id="updateRes"?parameterType="RealEstate"> update?real_estate?set?cardId=#{cardId},projectName=#{projectName},address=#{address},houseType=#{houseType},area=#{area},buildTime=#{buildTime}? where?cardId=#{cardId} </select> <select?id="deleteRes"?parameterType="RealEstate"> delete?from?real_estate?where?cardId=#{cardId}?or?id=#{id} </select> </mapper>controller中調(diào)用了getReListByUsers(users)方法，users對(duì)象的cardId屬性已賦值，控制臺(tái)輸出語(yǔ)句如下：[DEBUG] 2017-09-01 20:26:09,375 dao.RealEstateMapper.getReListByUsers - ==> ?Preparing: select * from real_estate where cardId=??[DEBUG] 2017-09-01 20:26:09,375 dao.RealEstateMapper.getReListByUsers - ==> Parameters: 123456789123456789(String)用foreach輸出查詢(xún)到的對(duì)象只顯示mysql中符合條件的最后一個(gè)數(shù)據(jù)，但是在mysql中能全部查出，參數(shù)我試了好幾種，結(jié)果都一樣，求解啊！