\u82e5\u5b57\u6bb5\u540d\u548c\u5b9e\u4f53\u7c7b\u4e2d\u7684\u5c5e\u6027\u540d\u4e0d\u4e00\u81f4\uff0c\u5219\u53ef\u4ee5\u901a\u8fc7resultMap\u8bbe\u7f6e\u81ea\u5b9a\u4e49\u6620\u5c04<\/p>\n\n\n\n
<!--\n resultMap\uff1a\u8bbe\u7f6e\u81ea\u5b9a\u4e49\u6620\u5c04\n \u5c5e\u6027\uff1a\n id\uff1a\u8868\u793a\u81ea\u5b9a\u4e49\u6620\u5c04\u7684\u552f\u4e00\u6807\u8bc6\n type\uff1a\u67e5\u8be2\u7684\u6570\u636e\u8981\u6620\u5c04\u7684\u5b9e\u4f53\u7c7b\u7684\u7c7b\u578b\n \u5b50\u6807\u7b7e\uff1a\n id\uff1a\u8bbe\u7f6e\u4e3b\u952e\u7684\u6620\u5c04\u5173\u7cfb\n result\uff1a\u8bbe\u7f6e\u666e\u901a\u5b57\u6bb5\u7684\u6620\u5c04\u5173\u7cfb\n association\uff1a\u8bbe\u7f6e\u591a\u5bf9\u4e00\u7684\u6620\u5c04\u5173\u7cfb\n collection\uff1a\u8bbe\u7f6e\u4e00\u5bf9\u591a\u7684\u6620\u5c04\u5173\u7cfb\n \u5c5e\u6027\uff1a\n property\uff1a\u8bbe\u7f6e\u6620\u5c04\u5173\u7cfb\u4e2d\u5b9e\u4f53\u7c7b\u4e2d\u7684\u5c5e\u6027\u540d\n column\uff1a\u8bbe\u7f6e\u6620\u5c04\u5173\u7cfb\u4e2d\u8868\u4e2d\u7684\u5b57\u6bb5\u540d\n -->\n <resultMap id=\"userMap\" type=\"User\">\n <id property=\"id\" column=\"id\"><\/id>\n <result property=\"userName\" column=\"user_name\"><\/result>\n <result property=\"password\" column=\"password\"><\/result>\n <result property=\"age\" column=\"age\"><\/result>\n <result property=\"sex\" column=\"sex\"><\/result>\n <\/resultMap>\n <!--List<User> testMohu(@Param(\"mohu\") String mohu);-->\n <select id=\"testMohu\" resultMap=\"userMap\">\n <!--select * from t_user where username like '%${mohu}%'-->\n select id,user_name,password,age,sex from t_user where user_name like concat('%',#{mohu},'%')\n <\/select><\/code><\/pre>\n\n\n\n\n\u82e5\u5b57\u6bb5\u540d\u548c\u5b9e\u4f53\u7c7b\u4e2d\u7684\u5c5e\u6027\u540d\u4e0d\u4e00\u81f4\uff0c\u4f46\u662f\u5b57\u6bb5\u540d\u7b26\u5408\u6570\u636e\u5e93\u7684\u89c4\u5219\uff08\u4f7f\u7528_\uff09\uff0c\u5b9e\u4f53\u7c7b\u4e2d\u7684\u5c5e\u6027
\u540d\u7b26\u5408Java\u7684\u89c4\u5219\uff08\u4f7f\u7528\u9a7c\u5cf0\uff09<\/p>\n\n\n\n
\u6b64\u65f6\u4e5f\u53ef\u901a\u8fc7\u4ee5\u4e0b\u4e24\u79cd\u65b9\u5f0f\u5904\u7406\u5b57\u6bb5\u540d\u548c\u5b9e\u4f53\u7c7b\u4e2d\u7684\u5c5e\u6027\u7684\u6620\u5c04\u5173\u7cfb<\/p>\n\n\n\n
a>\u53ef\u4ee5\u901a\u8fc7\u4e3a\u5b57\u6bb5\u8d77\u522b\u540d\u7684\u65b9\u5f0f\uff0c\u4fdd\u8bc1\u548c\u5b9e\u4f53\u7c7b\u4e2d\u7684\u5c5e\u6027\u540d\u4fdd\u6301\u4e00\u81f4<\/p>\n\n\n\n
b>\u53ef\u4ee5\u5728MyBatis\u7684\u6838\u5fc3\u914d\u7f6e\u6587\u4ef6\u4e2d\u8bbe\u7f6e\u4e00\u4e2a\u5168\u5c40\u914d\u7f6e\u4fe1\u606fmapUnderscoreToCamelCase\uff0c\u53ef
\u4ee5\u5728\u67e5\u8be2\u8868\u4e2d\u6570\u636e\u65f6\uff0c\u81ea\u52a8\u5c06_\u7c7b\u578b\u7684\u5b57\u6bb5\u540d\u8f6c\u6362\u4e3a\u9a7c\u5cf0<\/p>\n\n\n\n
\u4f8b\u5982\uff1a\u5b57\u6bb5\u540duser_name\uff0c\u8bbe\u7f6e\u4e86mapUnderscoreToCamelCase\uff0c\u6b64\u65f6\u5b57\u6bb5\u540d\u5c31\u4f1a\u8f6c\u6362\u4e3a
userName<\/p>\n<\/blockquote>\n\n\n\n
2\u3001\u591a\u5bf9\u4e00\u6620\u5c04\u5904\u7406<\/h2>\n\n\n\n\n\u67e5\u8be2\u5458\u5de5\u4fe1\u606f\u4ee5\u53ca\u5458\u5de5\u6240\u5bf9\u5e94\u7684\u90e8\u95e8\u4fe1\u606f<\/p>\n<\/blockquote>\n\n\n\n
a>\u7ea7\u8054\u65b9\u5f0f\u5904\u7406\u6620\u5c04\u5173\u7cfb<\/h3>\n\n\n\n <resultMap id=\"empDeptMap\" type=\"Emp\">\n <id column=\"eid\" property=\"eid\"><\/id>\n <result column=\"ename\" property=\"ename\"><\/result>\n <result column=\"age\" property=\"age\"><\/result>\n <result column=\"sex\" property=\"sex\"><\/result>\n <result column=\"did\" property=\"dept.did\"><\/result>\n <result column=\"dname\" property=\"dept.dname\"><\/result>\n <\/resultMap>\n <!--Emp getEmpAndDeptByEid(@Param(\"eid\") int eid);-->\n <select id=\"getEmpAndDeptByEid\" resultMap=\"empDeptMap\">\n select emp.*,dept.* from t_emp emp left join t_dept dept on emp.did = dept.did where emp.eid = #{eid}\n <\/select><\/code><\/pre>\n\n\n\nb>\u4f7f\u7528association\u5904\u7406\u6620\u5c04\u5173\u7cfb<\/h3>\n\n\n\n <resultMap id=\"empDeptMap\" type=\"Emp\">\n <id column=\"eid\" property=\"eid\"><\/id>\n <result column=\"ename\" property=\"ename\"><\/result>\n <result column=\"age\" property=\"age\"><\/result>\n <result column=\"sex\" property=\"sex\"><\/result>\n <association property=\"dept\" javaType=\"Dept\">\n <id column=\"did\" property=\"did\"><\/id>\n <result column=\"dname\" property=\"dname\"><\/result>\n <\/association>\n <\/resultMap>\n <!--Emp getEmpAndDeptByEid(@Param(\"eid\") int eid);-->\n <select id=\"getEmpAndDeptByEid\" resultMap=\"empDeptMap\">\n select emp.*,dept.* from t_emp emp left join t_dept dept on emp.did = dept.did where emp.eid = #{eid}\n <\/select><\/code><\/pre>\n\n\n\nc>\u5206\u6b65\u67e5\u8be2<\/h3>\n\n\n\n
1\uff09\u67e5\u8be2\u5458\u5de5\u4fe1\u606f<\/p>\n\n\n\n
\/**\n * \u901a\u8fc7\u5206\u6b65\u67e5\u8be2\u67e5\u8be2\u5458\u5de5\u4fe1\u606f\n * @param eid\n * @return\n *\/\n Emp getEmpByStep(@Param(\"eid\") int eid);<\/code><\/pre>\n\n\n\n <resultMap id=\"empDeptStepMap\" type=\"Emp\">\n <id column=\"eid\" property=\"eid\"><\/id>\n <result column=\"ename\" property=\"ename\"><\/result>\n <result column=\"age\" property=\"age\"><\/result>\n <result column=\"sex\" property=\"sex\"><\/result>\n <!--\n select\uff1a\u8bbe\u7f6e\u5206\u6b65\u67e5\u8be2\uff0c\u67e5\u8be2\u67d0\u4e2a\u5c5e\u6027\u7684\u503c\u7684sql\u7684\u6807\u8bc6\uff08namespace.sqlId\uff09\n column\uff1a\u5c06sql\u4ee5\u53ca\u67e5\u8be2\u7ed3\u679c\u4e2d\u7684\u67d0\u4e2a\u5b57\u6bb5\u8bbe\u7f6e\u4e3a\u5206\u6b65\u67e5\u8be2\u7684\u6761\u4ef6\n -->\n <association property=\"dept\" select=\"top.qaqaq.MyBatis.mapper.DeptMapper.getEmpDeptByStep\" column=\"did\">\n <\/association>\n <\/resultMap>\n <!--Emp getEmpByStep(@Param(\"eid\") int eid);-->\n <select id=\"getEmpByStep\" resultMap=\"empDeptStepMap\">\n select * from t_emp where eid = #{eid}\n <\/select><\/code><\/pre>\n\n\n\n2\uff09\u6839\u636e\u5458\u5de5\u6240\u5bf9\u5e94\u7684\u90e8\u95e8id\u67e5\u8be2\u90e8\u95e8\u4fe1\u606f<\/p>\n\n\n\n
\/**\n * \u5206\u6b65\u67e5\u8be2\u7684\u7b2c\u4e8c\u6b65\uff1a\u6839\u636e\u5458\u5de5\u6240\u5bf9\u5e94\u7684did\u67e5\u8be2\u90e8\u95e8\u4fe1\u606f\n * @param did\n * @return\n *\/\n Dept getEmpDeptByStep(@Param(\"did\") int did);<\/code><\/pre>\n\n\n\n <!--Dept getEmpDeptByStep(@Param(\"did\") int did);-->\n <select id=\"getEmpDeptByStep\" resultType=\"Dept\">\n select * from t_dept where did = #{did}\n <\/select><\/code><\/pre>\n\n\n\n3\u3001\u4e00\u5bf9\u591a\u6620\u5c04\u5904\u7406<\/h2>\n\n\n\na>collection<\/h3>\n\n\n\n \/**\n * \u6839\u636e\u90e8\u95e8id\u67e5\u65b0\u90e8\u95e8\u4ee5\u53ca\u90e8\u95e8\u4e2d\u7684\u5458\u5de5\u4fe1\u606f\n * @param did\n * @return\n *\/\n Dept getDeptEmpByDid(@Param(\"did\") int did);<\/code><\/pre>\n\n\n\n <resultMap id=\"deptEmpMap\" type=\"Dept\">\n <id property=\"did\" column=\"did\"><\/id>\n <result property=\"dname\" column=\"dname\"><\/result>\n <!--\n ofType\uff1a\u8bbe\u7f6ecollection\u6807\u7b7e\u6240\u5904\u7406\u7684\u96c6\u5408\u5c5e\u6027\u4e2d\u5b58\u50a8\u6570\u636e\u7684\u7c7b\u578b\n -->\n <collection property=\"emps\" ofType=\"Emp\">\n <id property=\"eid\" column=\"eid\"><\/id>\n <result property=\"ename\" column=\"ename\"><\/result>\n <result property=\"age\" column=\"age\"><\/result>\n <result property=\"sex\" column=\"sex\"><\/result>\n <\/collection>\n <\/resultMap>\n <!--Dept getDeptEmpByDid(@Param(\"did\") int did);-->\n <select id=\"getDeptEmpByDid\" resultMap=\"deptEmpMap\">\n select dept.*,emp.* from t_dept dept left join t_emp emp on dept.did = emp.did where dept.did = #{did}\n <\/select><\/code><\/pre>\n\n\n\nb>\u5206\u6b65\u67e5\u8be2<\/h3>\n\n\n\n
1\uff09\u67e5\u8be2\u90e8\u95e8\u4fe1\u606f<\/p>\n\n\n\n
\/**\n * \u5206\u6b65\u67e5\u8be2\u90e8\u95e8\u548c\u90e8\u95e8\u4e2d\u7684\u5458\u5de5\n * @param did\n * @return\n *\/\n Dept getDeptByStep(@Param(\"did\") int did);<\/code><\/pre>\n\n\n\n <resultMap id=\"deptEmpStep\" type=\"Dept\">\n <id property=\"did\" column=\"did\"><\/id>\n <result property=\"dname\" column=\"dname\"><\/result>\n <collection property=\"emps\" fetchType=\"eager\" select=\"top.qaqaq.MyBatis.mapper.EmpMapper.getEmpListByDid\" column=\"did\"><\/collection>\n <\/resultMap>\n <!--Dept getDeptByStep(@Param(\"did\") int did);-->\n <select id=\"getDeptByStep\" resultMap=\"deptEmpStep\">\n select * from t_dept where did = #{did}\n <\/select><\/code><\/pre>\n\n\n\n2\uff09\u6839\u636e\u90e8\u95e8id\u67e5\u8be2\u90e8\u95e8\u4e2d\u7684\u6240\u6709\u5458\u5de5<\/p>\n\n\n\n
\/**\n * \u6839\u636e\u90e8\u95e8id\u67e5\u8be2\u5458\u5de5\u4fe1\u606f\n * @param did\n * @return\n *\/\n List<Emp> getEmpListByDid(@Param(\"did\") int did);<\/code><\/pre>\n\n\n\n <!--List<Emp> getEmpListByDid(@Param(\"did\") int did);-->\n <select id=\"getEmpListByDid\" resultType=\"Emp\">\n select * from t_emp where did = #{did}\n <\/select><\/code><\/pre>\n\n\n\n\n\u5206\u6b65\u67e5\u8be2\u7684\u4f18\u70b9\uff1a\u53ef\u4ee5\u5b9e\u73b0\u5ef6\u8fdf\u52a0\u8f7d\uff0c\u4f46\u662f\u5fc5\u987b\u5728\u6838\u5fc3\u914d\u7f6e\u6587\u4ef6\u4e2d\u8bbe\u7f6e\u5168\u5c40\u914d\u7f6e\u4fe1\u606f\uff1a<\/p>\n\n\n\n
lazyLoadingEnabled\uff1a\u5ef6\u8fdf\u52a0\u8f7d\u7684\u5168\u5c40\u5f00\u5173\u3002\u5f53\u5f00\u542f\u65f6\uff0c\u6240\u6709\u5173\u8054\u5bf9\u8c61\u90fd\u4f1a\u5ef6\u8fdf\u52a0\u8f7d<\/p>\n\n\n\n
aggressiveLazyLoading\uff1a\u5f53\u5f00\u542f\u65f6\uff0c\u4efb\u4f55\u65b9\u6cd5\u7684\u8c03\u7528\u90fd\u4f1a\u52a0\u8f7d\u8be5\u5bf9\u8c61\u7684\u6240\u6709\u5c5e\u6027\u3002 \u5426\u5219\uff0c\u6bcf\u4e2a
\u5c5e\u6027\u4f1a\u6309\u9700\u52a0\u8f7d<\/p>\n\n\n\n
\u6b64\u65f6\u5c31\u53ef\u4ee5\u5b9e\u73b0\u6309\u9700\u52a0\u8f7d\uff0c\u83b7\u53d6\u7684\u6570\u636e\u662f\u4ec0\u4e48\uff0c\u5c31\u53ea\u4f1a\u6267\u884c\u76f8\u5e94\u7684sql\u3002\u6b64\u65f6\u53ef\u901a\u8fc7association\u548c
collection\u4e2d\u7684fetchType\u5c5e\u6027\u8bbe\u7f6e\u5f53\u524d\u7684\u5206\u6b65\u67e5\u8be2\u662f\u5426\u4f7f\u7528\u5ef6\u8fdf\u52a0\u8f7d\uff0cfetchType=”lazy(\u5ef6\u8fdf\u52a0
\u8f7d)|eager(\u7acb\u5373\u52a0\u8f7d)”<\/p>\n<\/blockquote>\n\n\n\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
1\u3001resultMap\u5904\u7406\u5b57\u6bb5\u548c\u5c5e\u6027\u7684\u6620\u5c04\u5173\u7cfb \u82e5\u5b57\u6bb5\u540d\u548c\u5b9e\u4f53\u7c7b\u4e2d\u7684\u5c5e\u6027\u540d\u4e0d\u4e00\u81f4\uff0c\u5219\u53ef\u4ee5\u901a\u8fc7resultMap […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[108],"tags":[111],"class_list":["post-3107","post","type-post","status-publish","format-standard","hentry","category-mybatis-code","tag-mybatis"],"_links":{"self":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/3107"}],"collection":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3107"}],"version-history":[{"count":2,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/3107\/revisions"}],"predecessor-version":[{"id":3243,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/3107\/revisions\/3243"}],"wp:attachment":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3107"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3107"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3107"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}