pom.xml<\/p>\n\n\n\n
<project xmlns=\"http:\/\/maven.apache.org\/POM\/4.0.0\" xmlns:xsi=\"http:\/\/www.w3.org\/2001\/XMLSchema-instance\"\n xsi:schemaLocation=\"http:\/\/maven.apache.org\/POM\/4.0.0 http:\/\/maven.apache.org\/xsd\/maven-4.0.0.xsd\">\n <modelVersion>4.0.0<\/modelVersion>\n\n <groupId>top.qaqaq.mybatis<\/groupId>\n <artifactId>MyBatis_demo2<\/artifactId>\n <version>1.0-SNAPSHOT<\/version>\n <packaging>jar<\/packaging>\n\n <name>MyBatis_demo2<\/name>\n <url>http:\/\/maven.apache.org<\/url>\n\n <properties>\n <project.build.sourceEncoding>UTF-8<\/project.build.sourceEncoding>\n <\/properties>\n\n <dependencies>\n <dependency>\n <groupId>junit<\/groupId>\n <artifactId>junit<\/artifactId>\n <version>3.8.1<\/version>\n <scope>test<\/scope>\n <\/dependency>\n\n <!-- Mybatis\u6838\u5fc3 -->\n <dependency>\n <groupId>org.mybatis<\/groupId>\n <artifactId>mybatis<\/artifactId>\n <version>3.5.7<\/version>\n <\/dependency>\n <!-- junit\u6d4b\u8bd5 -->\n <dependency>\n <groupId>junit<\/groupId>\n <artifactId>junit<\/artifactId>\n <version>4.12<\/version>\n <scope>test<\/scope>\n <\/dependency>\n <!-- MySQL\u9a71\u52a8 -->\n <dependency>\n <groupId>mysql<\/groupId>\n <artifactId>mysql-connector-java<\/artifactId>\n <version>8.0.31<\/version>\n <\/dependency>\n <!-- log4j\u65e5\u5fd7 -->\n <dependency>\n <groupId>log4j<\/groupId>\n <artifactId>log4j<\/artifactId>\n <version>1.2.17<\/version>\n <\/dependency>\n\n <\/dependencies>\n<\/project>\n<\/code><\/pre>\n\n\n\nresources<\/p>\n\n\n\n
mybatis-config.xml<\/p>\n\n\n\n
<?xml version=\"1.0\" encoding=\"UTF-8\" ?>\n<!DOCTYPE configuration\n PUBLIC \"-\/\/mybatis.org\/\/DTD Config 3.0\/\/EN\"\n \"http:\/\/mybatis.org\/dtd\/mybatis-3-config.dtd\">\n<configuration>\n\n <properties resource=\"jdbc.properties\" \/>\n\n <typeAliases>\n <package name=\"top.qaqaq.mybatis.pojo\"\/>\n <\/typeAliases>\n\n <environments default=\"development\">\n <environment id=\"development\">\n <transactionManager type=\"JDBC\"\/>\n <dataSource type=\"POOLED\">\n <property name=\"driver\" value=\"${jdbc.driver}\"\/>\n <property name=\"url\" value=\"${jdbc.url}\"\/>\n <property name=\"username\" value=\"${jdbc.username}\"\/>\n <property name=\"password\" value=\"${jdbc.password}\"\/>\n <\/dataSource>\n <\/environment>\n <\/environments>\n\n <mappers>\n <package name=\"top.qaqaq.mybatis.mapper\"\/>\n <\/mappers>\n<\/configuration><\/code><\/pre>\n\n\n\njdbc.properties<\/p>\n\n\n\n
jdbc.driver=com.mysql.cj.jdbc.Driver\njdbc.url=jdbc:mysql:\/\/localhost:3306\/mybatis\njdbc.username=root\njdbc.password=123456\n<\/code><\/pre>\n\n\n\nlog4j.xml<\/p>\n\n\n\n
<?xml version=\"1.0\" encoding=\"UTF-8\" ?>\n<!DOCTYPE log4j:configuration SYSTEM \"log4j.dtd\">\n<log4j:configuration xmlns:log4j=\"http:\/\/jakarta.apache.org\/log4j\/\">\n <appender name=\"STDOUT\" class=\"org.apache.log4j.ConsoleAppender\">\n <param name=\"Encoding\" value=\"UTF-8\" \/>\n <layout class=\"org.apache.log4j.PatternLayout\">\n <param name=\"ConversionPattern\" value=\"%-5p %d{MM-dd HH:mm:ss,SSS}%m (%F:%L) \\n\" \/>\n <\/layout>\n <\/appender>\n <logger name=\"java.sql\">\n <level value=\"debug\" \/>\n <\/logger>\n <logger name=\"org.apache.ibatis\">\n <level value=\"info\" \/>\n <\/logger>\n <root>\n <level value=\"debug\" \/>\n <appender-ref ref=\"STDOUT\" \/>\n <\/root>\n<\/log4j:configuration><\/code><\/pre>\n\n\n\nresources\/mapper<\/p>\n\n\n\n
ParameterMapper.xml<\/h3>\n\n\n\n<?xml version=\"1.0\" encoding=\"UTF-8\" ?>\n<!DOCTYPE mapper\n PUBLIC \"-\/\/mybatis.org\/\/DTD Mapper 3.0\/\/EN\"\n \"http:\/\/mybatis.org\/dtd\/mybatis-3-mapper.dtd\">\n<mapper namespace=\"top.qaqaq.mybatis.mapper.ParameterMapper\">\n \n <!--List<User> getAllUser();-->\n <select id=\"getAllUser\" resultType=\"User\">\n select * from t_user\n <\/select>\n\n <!--User getUserByUsername(String username);-->\n <select id=\"getUserByUsername\" resultType=\"User\">\n <!--select * from t_user where username = #{username}-->\n select * from t_user where username = '${username}'\n <\/select>\n\n <!--User checkLogin(String username, String password);-->\n <select id=\"checkLogin\" resultType=\"User\">\n <!--select * from t_user where username = #{arg0} and password = #{arg1}-->\n select * from t_user where username = '${param1}' and password = '${param2}'\n <\/select>\n\n <!--User checkLoginByMap(Map<String, Object> map);-->\n <select id=\"checkLoginByMap\" resultType=\"User\">\n select * from t_user where username = '${username}' and password = '${password}'\n <\/select>\n\n <!--int insertUser(User user);-->\n <insert id=\"insertUser\">\n insert into t_user values (null, #{username}, #{password}, #{age}, #{sex}, #{email})\n <\/insert>\n\n <!--User checkLoginByParam(@Param(\"username\") String username, @Param(\"password\") String password);-->\n <select id=\"checkLoginByParam\" resultType=\"User\">\n select * from t_user where username = #{username} and password = #{password}\n <\/select><\/strong>\n\n<\/mapper><\/code><\/pre>\n\n\n\nmapper<\/p>\n\n\n\n
ParameterMapper .java<\/h3>\n\n\n\npackage top.qaqaq.mybatis.mapper;\n\nimport org.apache.ibatis.annotations.Param;\nimport top.qaqaq.mybatis.pojo.User;\n\nimport java.util.List;\nimport java.util.Map;\n\npublic interface ParameterMapper {\n\n \/**\n * \u9a8c\u8bc1\u767b\u5f55\uff08\u4f7f\u7528@Param\uff09\n *\/\n User checkLoginByParam(@Param(\"username\") String username, @Param(\"password\") String password);\n\n \/**\n * \u6dfb\u52a0\u7528\u6237\u4fe1\u606f\n *\/\n int insertUser(User user);\n\n \/**\n * \u9a8c\u8bc1\u767b\u5f55\uff08\u53c2\u6570\u4e3amap\uff09\n *\/\n User checkLoginByMap(Map<String, Object> map);\n\n \/**\n * \u9a8c\u8bc1\u767b\u5f55\n *\/\n User checkLogin(String username, String password);\n\n \/**\n * \u6839\u636e\u7528\u6237\u540d\u67e5\u8be2\u7528\u6237\u4fe1\u606f\n *\/\n User getUserByUsername(String username);\n\n \/**\n * \u67e5\u8be2\u6240\u6709\u7684\u5458\u5de5\u4fe1\u606f\n *\/\n List<User> getAllUser();<\/strong>\n\n}\n<\/code><\/pre>\n\n\n\npojo<\/p>\n\n\n\n
User .java<\/p>\n\n\n\n
package top.qaqaq.mybatis.pojo;\n\n\/**\n * @author RichieZhang\n * @create 2023-01-01 15:37\n *\/\npublic class User {\n\n private Integer id;\n private String username;\n private String password;\n private Integer age;\n private String sex;\n private String email;\n\n public User() {\n }\n\n public User(Integer id, String username, String password, Integer age, String sex, String email) {\n this.id = id;\n this.username = username;\n this.password = password;\n this.age = age;\n this.sex = sex;\n this.email = email;\n }\n\n public Integer getId() {\n return id;\n }\n\n public void setId(Integer id) {\n this.id = id;\n }\n\n public String getUsername() {\n return username;\n }\n\n public void setUsername(String username) {\n this.username = username;\n }\n\n public String getPassword() {\n return password;\n }\n\n public void setPassword(String password) {\n this.password = password;\n }\n\n public Integer getAge() {\n return age;\n }\n\n public void setAge(Integer age) {\n this.age = age;\n }\n\n public String getSex() {\n return sex;\n }\n\n public void setSex(String sex) {\n this.sex = sex;\n }\n\n public String getEmail() {\n return email;\n }\n\n public void setEmail(String email) {\n this.email = email;\n }\n\n @Override\n public String toString() {\n return \"User{\" +\n \"id=\" + id +\n \", username='\" + username + '\\'' +\n \", password='\" + password + '\\'' +\n \", age=\" + age +\n \", sex='\" + sex + '\\'' +\n \", email='\" + email + '\\'' +\n '}';\n }\n}\n<\/code><\/pre>\n\n\n\nutils<\/p>\n\n\n\n
SqlSessionUtils .java<\/p>\n\n\n\n
package top.qaqaq.mybatis.utils;\n\nimport org.apache.ibatis.io.Resources;\nimport org.apache.ibatis.session.SqlSession;\nimport org.apache.ibatis.session.SqlSessionFactory;\nimport org.apache.ibatis.session.SqlSessionFactoryBuilder;\n\nimport java.io.IOException;\nimport java.io.InputStream;\n\npublic class SqlSessionUtils {\n\n public static SqlSession getSqlSession() {\n SqlSession sqlSession = null;\n try {\n InputStream is = Resources.getResourceAsStream(\"mybatis-config.xml\");\n SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(is);\n sqlSession = sqlSessionFactory.openSession(true);\n } catch (IOException e) {\n throw new RuntimeException(e);\n }\n return sqlSession;\n }\n}\n<\/code><\/pre>\n\n\n\ntest<\/p>\n\n\n\n
ParameterMapperTest .java<\/h3>\n\n\n\npackage top.qaqaq.mybatis.test;\n\nimport org.apache.ibatis.session.SqlSession;\nimport org.junit.Test;\nimport top.qaqaq.mybatis.mapper.ParameterMapper;\nimport top.qaqaq.mybatis.pojo.User;\nimport top.qaqaq.mybatis.utils.SqlSessionUtils;\n\nimport java.sql.Connection;\nimport java.sql.DriverManager;\nimport java.sql.PreparedStatement;\nimport java.util.HashMap;\nimport java.util.List;\nimport java.util.Map;\n\npublic class ParameterMapperTest {\n\n \/**\n * MyBatis\u83b7\u53d6\u53c2\u6570\u503c\u7684\u4e24\u79cd\u65b9\u5f0f\uff1a${} \u548c #{}\n * ${} \u672c\u8d28\u5b57\u7b26\u4e32\u62fc\u63a5\n * #{} \u672c\u8d28\u5360\u4f4d\u7b26\u8d4b\u503c\n * MyBatis\u83b7\u53d6\u53c2\u6570\u503c\u7684\u5404\u79cd\u60c5\u51b5\uff1a\n * 1\u3001mapper\u63a5\u53e3\u65b9\u6cd5\u7684\u53c2\u6570\u4e3a\u5355\u4e2a\u7684\u5b57\u9762\u91cf\u7c7b\u578b\n * \u53ef\u4ee5\u901a\u8fc7 ${} \u548c #{} \u4ee5\u4efb\u610f\u7684\u540d\u79f0\u83b7\u53d6\u53c2\u6570\u503c\uff0c\u4f46\u9700\u8981\u6ce8\u610f ${} \u7684\u5355\u5f15\u53f7\u95ee\u9898\n * 2\u3001mapper\u63a5\u53e3\u65b9\u6cd5\u7684\u53c2\u6570\u4e3a\u591a\u4e2a\u65f6\n * \u6b64\u65f6MyBatis\u4f1a\u5c06\u8fd9\u4e9b\u53c2\u6570\u653e\u5728\u4e00\u4e2amap\u96c6\u5408\u4e2d\uff0c\u4ee5\u4e24\u79cd\u65b9\u5f0f\u8fdb\u884c\u5b58\u50a8\n * a>\u4ee5arg0,arg1...\u4e3a\u952e\uff0c\u4ee5\u53c2\u6570\u4e3a\u503c\n * b>\u4ee5param1,param2...\u4e3a\u952e\uff0c\u4ee5\u53c2\u6570\u4e3a\u503c\n * \u56e0\u6b64\u53ea\u9700\u8981\u901a\u8fc7 #{} \u548c ${} \u4ee5\u952e\u7684\u65b9\u5f0f\u8bbf\u95ee\u503c\u5373\u53ef\uff0c\u4f46\u9700\u8981\u6ce8\u610f ${} \u7684\u5355\u5f15\u53f7\u95ee\u9898\n * 3\u3001\u82e5mapper\u63a5\u53e3\u65b9\u6cd5\u7684\u53c2\u6570\u6709\u591a\u4e2a\u65f6\uff0c\u53ef\u4ee5\u624b\u52a8\u5c06\u8fd9\u4e9b\u53c2\u6570\u653e\u5728\u4e00\u4e2amap\u4e2d\u5b58\u50a8\n * \u53ea\u9700\u8981\u901a\u8fc7 #{} \u548c ${} \u4ee5\u952e\u7684\u65b9\u5f0f\u8bbf\u95ee\u503c\u5373\u53ef\uff0c\u4f46\u9700\u8981\u6ce8\u610f ${} \u7684\u5355\u5f15\u53f7\u95ee\u9898\n * 4\u3001mapper\u63a5\u53e3\u65b9\u6cd5\u7684\u53c2\u6570\u662f\u5b9e\u4f53\u7c7b\u7c7b\u578b\u7684\u53c2\u6570\n * \u53ea\u9700\u8981\u901a\u8fc7 #{} \u548c ${} \u4ee5\u5c5e\u6027\u7684\u65b9\u5f0f\u8bbf\u95ee\u503c\u5373\u53ef\uff0c\u4f46\u9700\u8981\u6ce8\u610f ${} \u7684\u5355\u5f15\u53f7\u95ee\u9898\n * 5\u3001\u4f7f\u7528@Param\u6ce8\u89e3\u547d\u540d\u53c2\u6570\n * \u6b64\u65f6MyBatis\u4f1a\u5c06\u8fd9\u4e9b\u53c2\u6570\u653e\u5728\u4e00\u4e2amap\u96c6\u5408\u4e2d\uff0c\u4ee5\u4e24\u79cd\u65b9\u5f0f\u8fdb\u884c\u5b58\u50a8\n * a>\u4ee5@Param\u6ce8\u89e3\u7684\u503c\u4e3a\u952e\uff0c\u4ee5\u53c2\u6570\u4e3a\u503c\n * b>\u4ee5param1,param2...\u4e3a\u952e\uff0c\u4ee5\u53c2\u6570\u4e3a\u503c\n * \u56e0\u6b64\u53ea\u9700\u8981\u901a\u8fc7 #{} \u548c ${} \u4ee5\u952e\u7684\u65b9\u5f0f\u8bbf\u95ee\u503c\u5373\u53ef\uff0c\u4f46\u9700\u8981\u6ce8\u610f ${} \u7684\u5355\u5f15\u53f7\u95ee\u9898\n *\/\n\n @Test\n public void testCheckLoginByParam() {\n SqlSession sqlSession = SqlSessionUtils.getSqlSession();\n ParameterMapper mapper = sqlSession.getMapper(ParameterMapper.class);\n User user = mapper.checkLoginByParam(\"admin\", \"123456\");\n System.out.println(user);\n }\n\n @Test\n public void testInsertUser() {\n SqlSession sqlSession = SqlSessionUtils.getSqlSession();\n ParameterMapper mapper = sqlSession.getMapper(ParameterMapper.class);\n int result = mapper.insertUser(new User(null, \"\u674e\u56db\", \"123\", 23, \"\u7537\", \"123@qq.com\"));\n System.out.println(result);\n }\n\n @Test\n public void testCheckLoginByMap() {\n SqlSession sqlSession = SqlSessionUtils.getSqlSession();\n ParameterMapper mapper = sqlSession.getMapper(ParameterMapper.class);\n Map<String, Object> map = new HashMap<>();\n map.put(\"username\", \"admin\");\n map.put(\"password\", \"123456\");\n User user = mapper.checkLoginByMap(map);\n System.out.println(user);\n }\n\n @Test\n public void testCheckLogin() {\n SqlSession sqlSession = SqlSessionUtils.getSqlSession();\n ParameterMapper mapper = sqlSession.getMapper(ParameterMapper.class);\n User user = mapper.checkLogin(\"admin\", \"123456\");\n System.out.println(user);\n }\n\n @Test\n public void testGetUserByUsername() {\n SqlSession sqlSession = SqlSessionUtils.getSqlSession();\n ParameterMapper mapper = sqlSession.getMapper(ParameterMapper.class);\n User user = mapper.getUserByUsername(\"admin\");\n System.out.println(user);\n }<\/strong>\n\n @Test\n public void testGetAllUser() {\n SqlSession sqlSession = SqlSessionUtils.getSqlSession();\n ParameterMapper mapper = sqlSession.getMapper(ParameterMapper.class);\n List<User> list = mapper.getAllUser();\n list.forEach(user -> System.out.println(user));\n }\n\n @Test\n public void testJDBC() throws Exception {\n String username = \"admin\";\n Class.forName(\"\");\n Connection connection = DriverManager.getConnection(\"\",\"\",\"\");\n \/\/PreparedStatement ps = connection.prepareStatement(\"select * from t_user where username = '\" + username + \"'\");\n PreparedStatement ps = connection.prepareStatement(\"select * from t_user where username = ?\");\n ps.setString(1, username);\n }\n}\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"pom.xml resources mybatis-config.xml jdbc.properties lo […]<\/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-3092","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\/3092"}],"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=3092"}],"version-history":[{"count":3,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/3092\/revisions"}],"predecessor-version":[{"id":3122,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/3092\/revisions\/3122"}],"wp:attachment":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3092"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3092"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3092"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}