{"id":2748,"date":"2020-12-18T11:38:02","date_gmt":"2020-12-18T03:38:02","guid":{"rendered":"http:\/\/127.0.0.2\/?p=2748"},"modified":"2020-12-18T15:09:04","modified_gmt":"2020-12-18T07:09:04","slug":"2020java%e6%a1%86%e6%9e%b6%e6%95%99%e7%a8%8b%e4%b9%8bmybatis%e5%85%a5%e9%97%a8","status":"publish","type":"post","link":"https:\/\/www.9713job.com\/?p=2748","title":{"rendered":"2020java\u6846\u67b6\u6559\u7a0b\u4e4bMybatis\u5165\u95e8"},"content":{"rendered":"

2020java\u6846\u67b6\u6559\u7a0b\u4e4bMybatis\u5165\u95e8<\/h3>\n

\u5927\u7eb2\uff1a<\/strong><\/p>\n

1.Mybatis \u6301\u4e45\u5c42\uff1a\u7b80\u5316\u5de5\u4f5c\u91cf\uff0c\u7075\u6d3b<\/strong><\/p>\n

2.spring \u7c98\u5408\u5242\uff1a\u6574\u5408\u6846\u67b6\u3001AOP\u3001IOC\u3001DI<\/strong><\/p>\n

3.SpringMVC \u8868\u73b0\u5c42\uff1a\u65b9\u4fbf\u524d\u540e\u7aef\u6570\u636e\u7684\u4f20\u8f93\u3002<\/strong><\/p>\n

 <\/p>\n

1.\u4ec0\u4e48\u662fMybatis<\/h3>\n

a.Mybatis\u662f\u5bf9jdbc\u7684\u5c01\u88c5
\nb.\u5c06SQL\u8bed\u53e5\u653e\u5728\u6620\u5c04\u6587\u4ef6\u4e2d(xml)
\nc.\u81ea\u52a8\u5c06\u8f93\u5165\u53c2\u6570\u6620\u5c04\u5230sql\u8bed\u53e5\u7684\u52a8\u6001\u53c2\u6570\u4e0a
\nd.\u81ea\u52a8\u5c06sql\u8bed\u53e5\u6267\u884c\u7684\u7ed3\u679c\u6620\u5c04\u6210java\u5bf9\u8c61<\/p>\n

2.Mybatis\u5165\u95e8<\/h3>\n

a.\u521b\u5efaweb\u9879\u76ee
\nb.\u5bfc\u5165\u76f8\u5173\u4f9d\u8d56\uff1a
\n<\/p>\n

<dependency>\r\n  <groupId>log4j<\/groupId>\r\n  <artifactId>log4j<\/artifactId>\r\n  <version>1.2.12<\/version>\r\n<\/dependency>\r\n<dependency>\r\n  <groupId>org.wisdom-framework<\/groupId>\r\n  <artifactId>mysql-connector-java<\/artifactId>\r\n  <version>5.1.34_1<\/version>\r\n<\/dependency>\r\n<dependency>\r\n  <groupId>org.mybatis<\/groupId>\r\n  <artifactId>mybatis<\/artifactId>\r\n  <version>3.2.8<\/version>\r\n<\/dependency><\/pre>\n
3.\u52a0\u5165\u914d\u7f6e\u6587\u4ef6<\/h3>\n
a.database.properties<\/strong><\/p>\n
#\u8fde\u63a5\u8bbe\u7f6e\r\ndriver=com.mysql.jdbc.Driver\r\nurl=jdbc:mysql:\/\/localhost:3306\/demo?useUnicode=true&characterEncoding=utf8\r\nusername=root\r\npassword=root\r\n#<!-- \u521d\u59cb\u5316\u8fde\u63a5 -->\r\ninitialSize=10\r\n#\u6700\u5927\u8fde\u63a5\u6570\u91cf\r\nmaxActive=50\r\n#<!-- \u6700\u5c0f\u7a7a\u95f2\u8fde\u63a5 -->\r\nminIdle=5\r\n#<!-- \u8d85\u65f6\u7b49\u5f85\u65f6\u95f4\u4ee5\u6beb\u79d2\u4e3a\u5355\u4f4d 6000\u6beb\u79d2\/1000\u7b49\u4e8e60\u79d2 -->\r\nmaxWait=5000<\/pre>\n
\n
b.log4j.properties<\/strong><\/p>\n
#log4j.rootCategory=INFO, stdout\r\nlog4j.rootCategory=error, stdout\r\n\r\nlog4j.appender.stdout=org.apache.log4j.ConsoleAppender\r\nlog4j.appender.stdout.layout=org.apache.log4j.PatternLayout\r\nlog4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p %t %c{2}:%L - %m%n\r\n\r\n#log4j.category.org.springframework.beans.factory=DEBUG\r\nlog4j.category.org.springframework.beans.factory=error<\/pre>\n
\n
c.mybatis-config.xml<\/strong><\/p>\n
<?xml version=\"1.0\" encoding=\"UTF-8\" ?>\r\n<!DOCTYPE configuration PUBLIC \"-\/\/mybatis.org\/\/DTD Config 3.0\/\/EN\"\r\n        \"http:\/\/mybatis.org\/dtd\/mybatis-3-config.dtd\">\r\n<configuration>\r\n    <!--\u5f15\u5165\u6570\u636e\u5e93\u8fde\u63a5\u914d\u7f6e -->\r\n    <properties resource=\"database.properties\"\/>\r\n    <!--\u5b9a\u4e49\u522b\u540d-->\r\n    <typeAliases>\r\n        <package name=\"mybatis.entity\"\/>\r\n    <\/typeAliases>\r\n    <!--\u5b9a\u4e49\u6570\u636e\u6e90-->\r\n    <environments default=\"development\">\r\n        <environment id=\"development\">\r\n            <transactionManager type=\"JDBC\"\/>\r\n            <dataSource type=\"POOLED\">\r\n                <property name=\"driver\" value=\"${driver}\"\/>\r\n                <property name=\"url\" value=\"${url}\"\/>\r\n                <property name=\"username\" value=\"${username}\"\/>\r\n                <property name=\"password\" value=\"${password}\"\/>\r\n            <\/dataSource>\r\n        <\/environment>\r\n    <\/environments>\r\n    <mappers>\r\n        <mapper resource=\"MybatisMapper.xml\"\/>\r\n    <\/mappers>\r\n<\/configuration><\/pre>\n
\n
d.\u6620\u5c04\u6587\u4ef6 MybatisMapper.xml<\/strong><\/p>\n
<?xml version=\"1.0\" encoding=\"UTF-8\" ?>\r\n<!DOCTYPE mapper PUBLIC \"-\/\/mybatis.org\/\/DTD Mapper 3.0\/\/EN\"\r\n        \"http:\/\/mybatis.org\/dtd\/mybatis-3-mapper.dtd\">\r\n<mapper namespace=\"mybatis.dao.UsersDao\">\r\n    <!-- \u901a\u8fc7 id \u67e5\u8be2\u7528\u6237 -->\r\n    <select id=\"selectUser\" resultType=\"Users\" parameterType<\/strong>=\"int\">\r\n        select * from users where id = #{id}\r\n    <\/select>\r\n<\/mapper><\/pre>\n
parameterType\u7c7b\u578b\uff1a<\/strong><\/p>\n
\"\"<\/p>\n
4.\u7f16\u5199\u63a5\u53e3<\/h3>\n
public interface UsersDao {\r\n    Users selectUser(Integer id);\r\n}<\/pre>\n
5.\u521b\u5efa\u5b9e\u4f53\u7c7b<\/h3>\n
6.\u521b\u5efa\u5de5\u5177\u7c7b<\/h3>\n
public class MybatisUtils {\r\n    private static SqlSessionFactory ssf;\r\n    static{\r\n        try{\r\n            InputStream in= Resources.getResourceAsStream(\"mybatis-config.xml\");\r\n            ssf=new SqlSessionFactoryBuilder().build(in);\r\n        }catch (Exception e){}\r\n    }\r\n    public static SqlSession getSqlSession(){\r\n        return ssf.openSession();\r\n    }\r\n}<\/pre>\n
\u76ee\u5f55\u7ed3\u6784<\/h3>\n
\"\"<\/p>\n
7.\u521b\u5efa\u6d4b\u8bd5\u7528\u4f8b<\/h3>\n
public class Tests {\r\n    @Test\r\n    public 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}<\/pre>\n
\"\"<\/p>\n
\u4e0d\u4f7f\u7528\u63a5\u53e3\u65b9\u6cd5<\/p>\n
public class Tests {\r\n    @Test\r\n    public void test2(){\r\n        SqlSession sqlSession = MybatisUtils.getSqlSession();\r\n        Users users = (Users) sqlSession.selectOne(\r\n                \"mybatis.dao.UsersDao<\/strong>.selectUser<\/span>\", 2\r\n        );\r\n        sqlSession.close();\r\n        System.out.println(users);\r\n    }\r\n}<\/pre>\n","protected":false},"excerpt":{"rendered":"
2020java\u6846\u67b6\u6559\u7a0b\u4e4bMybatis\u5165\u95e8 \u5927\u7eb2\uff1a 1.Mybatis \u6301\u4e45\u5c42\uff1a\u7b80\u5316\u5de5\u4f5c\u91cf\uff0c\u7075\u6d3b 2.spr […]<\/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-2748","post","type-post","status-publish","format-standard","hentry"],"_links":{"self":[{"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/posts\/2748","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=2748"}],"version-history":[{"count":13,"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/posts\/2748\/revisions"}],"predecessor-version":[{"id":2772,"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/posts\/2748\/revisions\/2772"}],"wp:attachment":[{"href":"https:\/\/www.9713job.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2748"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.9713job.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2748"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.9713job.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2748"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}