{"id":2787,"date":"2020-12-19T11:35:41","date_gmt":"2020-12-19T03:35:41","guid":{"rendered":"http:\/\/127.0.0.2\/?p=2787"},"modified":"2020-12-19T16:25:50","modified_gmt":"2020-12-19T08:25:50","slug":"2020java%e6%a1%86%e6%9e%b6%e6%95%99%e7%a8%8b%e4%b9%8bmybatis%e7%9a%84%e5%a2%9e%e5%88%a0%e6%94%b9%e6%9f%a5crud","status":"publish","type":"post","link":"https:\/\/www.9713job.com\/?p=2787","title":{"rendered":"2020java\u6846\u67b6\u6559\u7a0b\u4e4bmybatis\u7684\u589e\u5220\u6539\u67e5CRUD"},"content":{"rendered":"

2020java\u6846\u67b6\u6559\u7a0b\u4e4bmybatis\u7684\u589e\u5220\u6539\u67e5CRUD<\/h3>\n

\u67e5\u8be2\uff1a<\/strong><\/h3>\n

mapper\uff1a<\/strong><\/p>\n

<!-- \u901a\u8fc7 id \u67e5\u8be2\u7528\u6237 -->\r\n<select id=\"selectUser\" resultType=\"Users\" parameterType=\"int\">\r\n    select * from users where id = #{id}\r\n<\/select>\r\n<!--  \u8bbe\u7f6e ResultMap -->\r\n<resultMap id=\"usersResultMap\" type=\"Users\">\r\n    <id column=\"id\" property=\"id\" jdbcType=\"INTEGER\"\/>\r\n    <!-- \u5c06 password \u8bbe\u7f6e pwd \u4e3a\u522b\u540d -->\r\n    <result column=\"pwd\" property=\"password\" jdbcType=\"VARCHAR\"\/>\r\n<\/resultMap>\r\n<!--  \u901a\u8fc7 resultMap \u67e5\u8be2\u7528\u6237 -->\r\n<select id=\"selectUser2\" resultMap=\"usersResultMap\" parameterType=\"int\">\r\n    select * from users where id = #{id}\r\n<\/select>\r\n<\/pre>\n
\"\"
\ndao\uff1a<\/strong><\/p>\n
Users selectUser2(Integer id);<\/pre>\n
\u6d4b\u8bd5\uff1a<\/strong><\/p>\n
@Test\r\npublic void test(){\r\n    SqlSession sqlSession = MybatisUtils.getSqlSession();\r\n    UsersDao mapper = sqlSession.getMapper(UsersDao.class);\r\n    Users users = mapper.selectUser(1);\r\n    sqlSession.close();\r\n    System.out.println(users);\r\n}\r\n@Test\r\npublic void test2(){\r\n    SqlSession sqlSession = MybatisUtils.getSqlSession();\r\n    Users users = (Users) sqlSession.selectOne(\r\n            \"mybatis.dao.UsersDao.selectUser\", 2\r\n    );\r\n    sqlSession.close();\r\n    System.out.println(users);\r\n}\r\n@Test\r\npublic void test3(){\r\n    SqlSession sqlSession = MybatisUtils.getSqlSession();\r\n    UsersDao mapper = sqlSession.getMapper(UsersDao.class);\r\n    Users users = mapper.selectUser2(2);\r\n    sqlSession.close();\r\n    System.out.println(users);\r\n}<\/pre>\n
\"\"
\n\"\"<\/p>\n
\u65b0\u589e\uff1a<\/strong><\/h3>\n
mapper\uff1a<\/strong><\/p>\n
<!-- \u589e\u52a0  -->\r\n<insert id=\"insertUsers\" parameterType=\"Users\" keyProperty=\"id\">\r\n    insert into users(username,password,rolename,identity,mobile)\r\n    values(#{username},#{password},#{rolename},#{identity},#{mobile})\r\n<\/insert><\/pre>\n
\"\"
\ndao\uff1a<\/strong><\/p>\n
int insertUsers(Users users);<\/pre>\n
\u6d4b\u8bd5\uff1a<\/strong><\/p>\n
@Test\r\npublic void test10(){\r\n    SqlSession sqlSession = MybatisUtils.getSqlSession();\r\n    UsersDao mapper = sqlSession.getMapper(UsersDao.class);\r\n    Users users=new Users(\"\u53efadmin444\",\"admin444\",\"\u53efadmin444\",\"7\",\"144\");\r\n    int i = mapper.insertUsers(users);\r\n    if(i>0) System.out.println(\"\u65b0\u589e\u6210\u529f\");\r\n    else System.out.println(\"\u65b0\u589e\u5931\u8d25\");\r\n    sqlSession.commit();\r\n    sqlSession.close();\r\n    System.out.println(users);\r\n}<\/pre>\n
\"\"<\/p>\n
\u4fee\u6539\uff1a<\/strong><\/h3>\n
mapper\uff1a<\/strong><\/p>\n
<!--\u4fee\u6539 -->\r\n<update id=\"updateUsers\" parameterType=\"Users\">\r\n    update users set password=#{password} where id=#{id}\r\n<\/update><\/pre>\n
\"\"
\ndao\uff1a<\/strong><\/p>\n
int updateUsers(Users users);<\/pre>\n
\u6d4b\u8bd5\uff1a<\/strong><\/p>\n
@Test\r\npublic void test11(){\r\n    SqlSession sqlSession = MybatisUtils.getSqlSession();\r\n    UsersDao mapper = sqlSession.getMapper(UsersDao.class);\r\n    Users users=new Users();\r\n    users.setId(1);\r\n    users.setPassword(\"admin666\");\r\n    int i = mapper.updateUsers(users);\r\n    if(i>0) System.out.println(\"\u4fee\u6539\u6210\u529f\");\r\n    else System.out.println(\"\u4fee\u6539\u5931\u8d25\");\r\n    sqlSession.commit();\r\n    sqlSession.close();\r\n    System.out.println(users);\r\n}<\/pre>\n
\"\"<\/p>\n
\u5220\u9664\uff1a<\/strong><\/h3>\n
mapper\uff1a<\/strong><\/p>\n
<!-- \u5220\u9664 -->\r\n<delete id=\"deleteUsers\" parameterType=\"int\">\r\n    delete from users where id=#{id}\r\n<\/delete><\/pre>\n
\"\"
\ndao\uff1a<\/strong><\/p>\n
int deleteUsers(Integer id);<\/pre>\n
\u6d4b\u8bd5\uff1a<\/strong><\/p>\n
@Test\r\npublic void test12(){\r\n    SqlSession sqlSession = MybatisUtils.getSqlSession();\r\n    UsersDao mapper = sqlSession.getMapper(UsersDao.class);\r\n    int i = mapper.deleteUsers(12);\r\n    if(i>0) System.out.println(\"\u5220\u9664\u6210\u529f\");\r\n    else System.out.println(\"\u5220\u9664\u5931\u8d25\");\r\n    sqlSession.commit();\r\n    sqlSession.close();\r\n}<\/pre>\n
\"\"<\/p>\n","protected":false},"excerpt":{"rendered":"
2020java\u6846\u67b6\u6559\u7a0b\u4e4bmybatis\u7684\u589e\u5220\u6539\u67e5CRUD \u67e5\u8be2\uff1a mapper\uff1a <!– \u901a\u8fc7 id […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-2787","post","type-post","status-publish","format-standard","hentry"],"_links":{"self":[{"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/posts\/2787","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.9713job.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2787"}],"version-history":[{"count":3,"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/posts\/2787\/revisions"}],"predecessor-version":[{"id":2798,"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/posts\/2787\/revisions\/2798"}],"wp:attachment":[{"href":"https:\/\/www.9713job.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2787"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.9713job.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2787"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.9713job.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2787"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}