{"id":1982,"date":"2017-06-15T20:53:23","date_gmt":"2017-06-15T12:53:23","guid":{"rendered":"https:\/\/ai.zhousir.top\/?p=1982"},"modified":"2026-08-18T11:22:12","modified_gmt":"2026-08-18T03:22:12","slug":"mybatis%e5%a4%9a%e8%a1%a8%e5%85%b3%e8%81%94%e6%9f%a5%e8%af%a2%e4%b9%8b%e5%a4%9a%e5%af%b9%e4%b8%80%e5%92%8c%e4%b8%80%e5%af%b9%e5%a4%9a","status":"publish","type":"post","link":"https:\/\/ai.zhousir.top\/?p=1982","title":{"rendered":"Mybatis\u591a\u8868\u5173\u8054\u67e5\u8be2\u4e4b\u591a\u5bf9\u4e00\u548c\u4e00\u5bf9\u591a"},"content":{"rendered":"
\n

MyBatis \u591a\u8868\u5173\u8054\u53ef\u4ee5\u5206\u6210\u56db\u79cd\uff1a\u4e00\u5bf9\u4e00\u3001\u4e00\u5bf9\u591a\u3001\u591a\u5bf9\u4e00\u3001\u591a\u5bf9\u591a<\/strong>\u3002\u6620\u5c04\u7684\u5173\u952e\u662f resultMap<\/code>\u3002\u7f51\u4e0a\u4ecb\u7ecd\u5f88\u591a\uff0c\u4f8b\u5982 MyBatis\u5b66\u4e60 \u4e4b \u4e8c\u3001SQL\u8bed\u53e5\u6620\u5c04\u6587\u4ef6(1)resultMap<\/a>\u3002\u672c\u6587\u7528 person \/ orders \u6f14\u793a\u591a\u5bf9\u4e00\u548c\u4e00\u5bf9\u591a\u3002<\/p>\n

\u591a\u5bf9\u4e00\u770b\u8ba2\u5355\u600e\u4e48\u5e26\u51fa\u6240\u5c5e\u4eba\uff0c\u7528 association<\/code>\uff1b\u4e00\u5bf9\u591a\u770b\u4eba\u600e\u4e48\u5e26\u51fa\u8ba2\u5355\u5217\u8868\uff0c\u7528 collection<\/code>\u3002\u4e24\u79cd\u65b9\u5411\u5404\u7ed9\u51e0\u79cd\u5199\u6cd5\uff1a\u5d4c\u5957\u7ed3\u679c\u3001\u590d\u7528 resultMap\u3001\u5d4c\u5957\u67e5\u8be2\u3002<\/p>\n

\u4e00\u3001\u591a\u5bf9\u4e00\uff1a\u8ba2\u5355 \u2192 \u4eba<\/h2>\n

\u51c6\u5907\u4e24\u5f20\u8868\uff0cperson \u548c order \u4e3a 1:n<\/h3>\n

\"person_order\"<\/a><\/p>\n

\u7c7b\u7ed3\u6784<\/h3>\n

\"class7\"<\/p>\n

\u6620\u5c04\u6587\u4ef6\u662f OrderMapper.xml<\/code>\u3002<\/p>\n\n\n\n\n\n\n\n
\u5199\u6cd5<\/th>\nassociation \u600e\u4e48\u914d<\/th>\nSQL<\/th>\n<\/tr>\n<\/thead>\n
\u5d4c\u5957\u7ed3\u679c<\/td>\njavaType<\/code> + \u5185\u5d4c id\/result<\/td>\n\u4e00\u6b21 join\uff0cp.* \u548c o.* \u4e00\u8d77\u67e5\u51fa<\/td>\n<\/tr>\n
\u590d\u7528 resultMap<\/td>\nresultMap<\/code> \u6307\u5411 personBaseBean<\/td>\n\u540c\u6837\u4e00\u6b21 join<\/td>\n<\/tr>\n
\u5d4c\u5957\u67e5\u8be2<\/td>\nselect<\/code> \u53e6\u67e5 Person<\/td>\n\u5148\u67e5\u8ba2\u5355\uff0c\u518d\u6309\u5916\u952e\u67e5\u4eba<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u7b2c\u4e00\u79cd\uff1a\u5d4c\u5957\u7ed3\u679c\u6620\u5c04<\/h3>\n

column<\/code> \u6307\u5916\u952e\uff0cproperty<\/code> \u6307\u5bf9\u8c61\u5c5e\u6027\uff0cjavaType<\/code> \u6307\u5c5e\u6027\u7c7b\u578b\uff1a<\/p>\n

<mapper namespace=\"com.ittx.mybatis.demo1.dao.OrderDao\">\n    <resultMap type=\"com.ittx.mybatis.demo1.model.Order\" id=\"orderBean\">\n        <id column=\"orderId\" property=\"id\"\/>\n        <result column=\"orderNumber\" property=\"number\"\/>\n        <result column=\"orderPrice\" property=\"price\"\/>\n        <!-- \u591a\u5bf9\u4e00\u7684\u5173\u7cfb -->\n        <!-- column: \u5916\u952e\uff1bproperty: \u5c5e\u6027\uff1bjavaType: \u5c5e\u6027\u7c7b\u578b -->\n        <association column=\"pid\" property=\"person\" javaType=\"com.ittx.mybatis.demo1.model.Person\">\n            <id column=\"personId\" property=\"id\"\/>\n            <result column=\"personName\" property=\"name\"\/>\n            <result column=\"personAddress\" property=\"address\"\/>\n            <result column=\"personTel\" property=\"tel\"\/>\n        <\/association>\n    <\/resultMap>\n\n    <!-- \u6839\u636e id \u67e5\u8be2 Order\uff0c\u5173\u8054\u5c06 Person \u67e5\u8be2\u51fa\u6765 -->\n    <select id=\"selectOrderById\" parameterType=\"string\" resultMap=\"orderBean\">\n        select p.*, o.* from person p, orders o where p.personId  = o.pid and o.orderId = #{id}\n    <\/select>\n<\/mapper><\/code><\/pre>\n
\u7b2c\u4e8c\u79cd\uff1aassociation \u5f15\u7528\u5df2\u6709 resultMap<\/h3>\n
<mapper namespace=\"com.ittx.mybatis.demo1.dao.OrderDao\">\n    <resultMap type=\"com.ittx.mybatis.demo1.model.Person\" id=\"personBaseBean\">\n        <id column=\"personId\" property=\"id\"\/>\n        <result column=\"personName\" property=\"name\"\/>\n        <result column=\"personAddress\" property=\"address\"\/>\n        <result column=\"personTel\" property=\"tel\"\/>\n    <\/resultMap>\n\n    <resultMap type=\"com.ittx.mybatis.demo1.model.Order\" id=\"orderBean\">\n        <id column=\"orderId\" property=\"id\"\/>\n        <result column=\"orderNumber\" property=\"number\"\/>\n        <result column=\"orderPrice\" property=\"price\"\/>\n        <!-- column: \u5916\u952e\uff1bproperty: \u5c5e\u6027\uff1bresultMap: \u5c5e\u6027\u7684\u6620\u5c04 -->\n        <association column=\"pid\" property=\"person\" resultMap=\"com.ittx.mybatis.demo1.dao.OrderDao.personBaseBean\"\/>\n    <\/resultMap>\n\n    <select id=\"selectOrderById\" parameterType=\"string\" resultMap=\"orderBean\">\n        select p.*, o.* from person p, orders o where p.personId  = o.pid and o.orderId = #{id}\n    <\/select>\n<\/mapper><\/code><\/pre>\n
\u7b2c\u4e09\u79cd\uff1aassociation \u7684 select \u5d4c\u5957\u67e5\u8be2<\/h3>\n
select<\/code> \u4f7f\u7528\u53e6\u4e00\u4e2a\u67e5\u8be2\u5c01\u88c5\u7ed3\u679c\uff0c\u9002\u5408\u5206\u6b65\u52a0\u8f7d\uff1a<\/p>\n
<mapper namespace=\"com.ittx.mybatis.demo1.dao.OrderDao\">\n    <resultMap type=\"com.ittx.mybatis.demo1.model.Order\" id=\"orderBean\">\n        <id column=\"orderId\" property=\"id\"\/>\n        <result column=\"orderNumber\" property=\"number\"\/>\n        <result column=\"orderPrice\" property=\"price\"\/>\n        <!-- column: \u5916\u952e\uff1bproperty: \u5c5e\u6027\uff1bselect: \u4f7f\u7528\u53e6\u4e00\u4e2a\u67e5\u8be2\u5c01\u88c5\u7684\u7ed3\u679c -->\n        <association column=\"orderId\" property=\"person\" select=\"selectPersonByOrderId\"\/>\n    <\/resultMap>\n\n    <select id=\"selectOrderById\" parameterType=\"string\"  resultMap=\"orderBean\">\n        select * from orders where orderId = #{id}\n    <\/select>\n\n    <select id=\"selectPersonByOrderId\" parameterType=\"string\" resultMap=\"com.ittx.mybatis.demo1.dao.OrderDao.personBaseBean\">\n        select * from person where personId in (select pid from orders where orderId = #{id})\n    <\/select>\n<\/mapper><\/code><\/pre>\n
\u4e8c\u3001\u4e00\u5bf9\u591a\uff1a\u4eba \u2192 \u8ba2\u5355\u5217\u8868<\/h2>\n
\u8868\u7ed3\u6784\u4e0d\u53d8\uff0c\u7c7b\u7ed3\u6784\u5982\u4e0b<\/h3>\n
\"\u4e00\u5bf9\u591a\"<\/a><\/p>\n
\u6620\u5c04\u6587\u4ef6\u6362\u6210 PersonMapper.xml<\/code>\uff0c\u7528 collection<\/code>\u3002<\/p>\n
\u7b2c\u4e00\u79cd\uff1acollection \u5185\u5d4c\u6620\u5c04<\/h3>\n
property<\/code> \u662f\u96c6\u5408\u5c5e\u6027\uff0cofType<\/code> \u662f\u96c6\u5408\u5143\u7d20\u7c7b\u578b\uff1a<\/p>\n
<resultMap type=\"com.ittx.mybatis.demo1.model.Person\" id=\"personBean\">\n        <id column=\"personId\" property=\"id\"\/>\n        <result column=\"personName\" property=\"name\"\/>\n        <result column=\"personAddress\" property=\"address\"\/>\n        <result column=\"personTel\" property=\"tel\"\/>\n\n        <!-- \u4e00\u5bf9\u591a\u7684\u5173\u7cfb -->\n        <!-- property: \u96c6\u5408\u5c5e\u6027\uff1bofType: \u96c6\u5408\u4e2d\u5143\u7d20\u7684\u7c7b\u578b -->\n        <collection property=\"orders\" ofType=\"com.ittx.mybatis.demo1.model.Order\">\n            <id column=\"orderId\" property=\"id\"\/>\n            <result column=\"orderNumber\" property=\"number\"\/>\n            <result column=\"orderPrice\" property=\"price\"\/>\n        <\/collection>\n    <\/resultMap>\n\n    <!-- \u6839\u636e id \u67e5\u8be2 Person\uff0c\u5173\u8054\u5c06 Orders \u67e5\u8be2\u51fa\u6765 -->\n    <select id=\"selectPersonById\" parameterType=\"string\" resultMap=\"personBean\">\n        select p.*, o.* from person p, orders o where p.personId  = o.pid and p.personId = #{id}\n    <\/select><\/code><\/pre>\n
\u7b2c\u4e8c\u79cd\uff1acollection \u5f15\u7528 orderBaseBean<\/h3>\n
<resultMap type=\"com.ittx.mybatis.demo1.model.Order\" id=\"orderBaseBean\">\n        <id column=\"orderId\" property=\"id\"\/>\n        <result column=\"orderNumber\" property=\"number\"\/>\n        <result column=\"orderPrice\" property=\"price\"\/>\n    <\/resultMap>\n    <resultMap type=\"com.ittx.mybatis.demo1.model.Person\" id=\"personBean\">\n        <id column=\"personId\" property=\"id\"\/>\n        <result column=\"personName\" property=\"name\"\/>\n        <result column=\"personAddress\" property=\"address\"\/>\n        <result column=\"personTel\" property=\"tel\"\/>\n\n        <collection property=\"orders\" resultMap=\"com.ittx.mybatis.demo1.dao.OrderDao.orderBaseBean\"\/>\n    <\/resultMap>\n\n    <select id=\"selectPersonById\" parameterType=\"string\" resultMap=\"personBean\">\n        select p.*, o.* from person p, orders o where p.personId  = o.pid and p.personId = #{id}\n    <\/select><\/code><\/pre>\n
\n
\u4e00\u53e5\u8bdd\u603b\u7ed3\uff1a\u591a\u5bf9\u4e00\u7528 association \u88c5\u5355\u4e2a\u5bf9\u8c61\uff0c\u4e00\u5bf9\u591a\u7528 collection \u88c5\u5217\u8868\uff1b\u5d4c\u5957\u7ed3\u679c\u4e00\u6b21 join\uff0c\u5d4c\u5957\u67e5\u8be2\u62c6\u6210\u4e24\u6b21 SQL\u3002id \u5217\u5fc5\u987b\u6620\u5c04\u5bf9\uff0c\u5426\u5219\u96c6\u5408\u53bb\u91cd\u4f1a\u4e71\u3002<\/strong><\/p>\n<\/blockquote>\n<\/section>\n","protected":false},"excerpt":{"rendered":"
MyBatis \u591a\u8868\u5173\u8054\u53ef\u4ee5\u5206\u6210\u56db\u79cd\uff1a\u4e00\u5bf9\u4e00\u3001\u4e00\u5bf9\u591a\u3001\u591a\u5bf9\u4e00\u3001\u591a\u5bf9\u591a\u3002\u6620\u5c04\u7684\u5173\u952e\u662f resultMap\u3002\u7f51\u4e0a\u4ecb […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[92],"tags":[188],"_links":{"self":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/1982"}],"collection":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1982"}],"version-history":[{"count":3,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/1982\/revisions"}],"predecessor-version":[{"id":2412,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/1982\/revisions\/2412"}],"wp:attachment":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1982"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1982"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1982"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}