HelloWorld.java
package use.basic; import java.io.IOException; import java.io.Reader; import org.apache.ibatis.io.Resources; import org.apache.ibatis.session.SqlSession; import org.apache.ibatis.session.SqlSessionFactory; import org.apache.ibatis.session.SqlSessionFactoryBuilder; import com.mison.mapper.NewsMapper; import com.mison.model.News; public class HelloWorld { public static void main(String[] args) { try { String resource = "Configuration.xml"; //读取配置文件Configuration.xml Reader reader = Resources.getResourceAsReader(resource); SqlSessionFactory sqlMapper = new SqlSessionFactoryBuilder().build(reader); sqlMapper.getConfiguration().addMapper(NewsMapper.class); SqlSession session = sqlMapper.openSession(); //查询 方式一 News news = (News) session.selectOne("NewsMapper.selectNews", 1); System.out.println(news.getTitle()); //查询 方式二 NewsMapper mapper = session.getMapper(NewsMapper.class); News news1 = mapper.selectNews(2); System.out.println(news1.getAuthor()); News news2 = new News(); news2.setTitle("saf"); news2.setAuthor("hjq"); //插入 方式一 mapper.insertNews(news2); //插入 方式二 session.insert("NewsMapper.insertNews", news2); session.commit(); news2.setId(1); news2.setTitle("123"); session.update("NewsMapper.updateNews", news2); session.commit(); session.delete("NewsMapper.deleteNews", 6); session.commit(); session.close(); } catch (IOException e) { e.printStackTrace(); } } }
NewsMapper.java
package com.mison.mapper; import org.apache.ibatis.annotations.Delete; import org.apache.ibatis.annotations.Insert; import org.apache.ibatis.annotations.Select; import org.apache.ibatis.annotations.Update; import com.mison.model.News; public interface NewsMapper { @Select("SELECT * FROM news WHERE id = #{id}") News selectNews(int id); @Insert("insert into news(id,title,author) values(#{id},#{title},#{author})") void insertNews(News news); @Update("update news set title = #{title}, author = #{author} where id = #{id}") void updateNews(int id); @Delete("delete from news where id = #{id}") void deleteNews(int id); }
News.java
package com.mison.model; public class News { private Integer id; private String title; private String author; public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getTitle() { return title; } public void setTitle(String title) { this.title = title; } public String getAuthor() { return author; } public void setAuthor(String author) { this.author = author; } }
Configuration.xml
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<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd"> <configuration> <environments default="development"> <environment id="development"> <transactionManager type="JDBC" /> <dataSource type="POOLED"> <property name="driver" value="com.mysql.jdbc.Driver" /> <property name="url" value="jdbc:mysql://127.0.0.1:3306/test" /> <property name="username" value="root" /> <property name="password" value="root" /> </dataSource> </environment> </environments> <mappers> <mapper resource="NewsMapper.xml" /> </mappers> </configuration>
或
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd"> <configuration> <properties resource="jdbc.properties" /> <environments default="development"> <environment id="development"> <transactionManager type="JDBC" /> <dataSource type="POOLED"> <property name="driver" value="${jdbc.driver}" /> <property name="url" value="${jdbc.url}" /> <property name="username" value="${jdbc.username}" /> <property name="password" value="${jdbc.password}" /> </dataSource> </environment> </environments> <mappers> <mapper resource="NewsMapper.xml" /> </mappers> </configuration>
jdbc.properties
jdbc.driver=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://127.0.0.1:3306/test jdbc.username=root jdbc.password=root
NewsMapper.xml
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <mapper namespace="NewsMapper"> <select id="selectNews" parameterType="int" resultType="com.mison.model.News"> select * from news where id = #{id} </select> <insert id="insertNews" parameterType="com.mison.model.News"> insert into news(title,author) values(#{title},#{author}) </insert> <update id="updateNews" parameterType="com.mison.model.News"> update news set title = #{title} , author = #{author} where id = #{id} </update> <delete id="deleteNews" parameterType="com.mison.model.News"> delete from news where id = #{id} </delete> </mapper>