mybatis 入门案例

com.frank.domain

　　Blog.java

package com.frank.domain;

public class Blog {
    
    private Integer id;
    private String title;
    private String content;
    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 getContent() {
        return content;
    }
    public void setContent(String content) {
        this.content = content;
    }
    
    

}

　　BlogMapper.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="com.frank.domain.BlogMapper">
    <select id="selectBlog" resultType="com.frank.domain.Blog">
        select * from Blog where id = #{id}
    </select>
</mapper>

com.frank.test

　　Test.java

package com.frank.test;

import java.io.IOException;
import java.io.InputStream;

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.frank.domain.Blog;

public class Test {

    public static void main(String[] args) throws IOException {
        // TODO Auto-generated method stub

        String resource="mybatis-config.xml";
        InputStream inputStream=Resources.getResourceAsStream(resource);
        SqlSessionFactory sessionFaction=new SqlSessionFactoryBuilder().build(inputStream);
        SqlSession session=sessionFaction.openSession();
        
        Blog blog=session.selectOne("com.frank.domain.BlogMapper.selectBlog", 1);
        System.out.println(blog.getTitle());

    }

}

mybatis-config.xml

　

<?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/mybatis" />
                <property name="username" value="root" />
                <property name="password" value="frank1994" />
            </dataSource>
        </environment>
    </environments>
    <mappers>
        <mapper resource="com/frank/domain/BlogMapper.xml" />
    </mappers>
</configuration>