mybits(1)配置

mybits-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>
        <!-- 默认环境 -->
    <environments default="mysql">
        <!-- 配置mysql数据库 -->
        <environment id="mysql">
            <!-- JDBC事物管理 -->
            <transactionManager type="JDBC" />
            <!-- 数据库连接池 -->
            <dataSource type="POOLED">
                <property name="driver" value="com.mysql.jdbc.Driver" />
                <property name="url" value="jdbc:mysql://localhost:3306/mybits" />
                <property name="username" value="root" />
                <property name="password" value="123456" />
            </dataSource>
        </environment>
    </environments>
    <mappers>
        <mapper resource="com/kaibing/mapper/CustomerMapper.xml" />
    </mappers>
</configuration>

CustomerMapper.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.kaibing.mapper.CustomerMapper">
     <select id="findCustomerById" parameterType="Integer" 
         resultType="com.kaibing.pojo.Customer">
     select * from t_customer where id = #{id}
     </select>
</mapper>

 Customer.java

package com.kaibing.pojo;

public class Customer {
    private Integer id;
    private String username;
    private String jobs;
    private String phone;
    public Integer getId() {
        return id;
    }
    public void setId(Integer id) {
        this.id = id;
    }
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getJobs() {
        return jobs;
    }
    public void setJobs(String jobs) {
        this.jobs = jobs;
    }
    public String getPhone() {
        return phone;
    }
    public void setPhone(String phone) {
        this.phone = phone;
    }
    @Override
    public String toString() {
        return "Customer [id=" + id + ", username=" + username + ", jobs=" + jobs + ", phone=" + phone + "]";
    }
    
    
    

}

MybitsTest.java

package com.kaibing.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.kaibing.pojo.Customer;

public class MybitsTest {
    
    public static void main(String[] args) {
        String resource = "mybits-config.xml";
//        读取配置文件
        InputStream inputStream=null;
        try {
            inputStream = Resources.getResourceAsStream(resource);
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        
//        构建配置文件工厂
        SqlSessionFactory sqlSessionFactory = 
                new SqlSessionFactoryBuilder().build(inputStream);
//        创建会话
        SqlSession sqlSession = sqlSessionFactory.openSession();
//        查询
        Customer customer =  sqlSession.selectOne("com.kaibing.mapper.CustomerMapper"
                + ".findCustomerById",1);
//        输出结果
        System.out.println(customer.toString());
        
//        关闭会话
        sqlSession.close();
    }
    

}

 配置log4j

log4j.properties

# Global logging configuration
log4j.rootLogger=ERROR, stdout
# MyBatis logging configuration...
log4j.logger.com.kaibing=DEBUG
# Console output...
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n