mybatis注解开发-环境搭建

环境搭建及测试

jar包的引用

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.study</groupId>
    <artifactId>annotation_mybatis</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging>


    <dependencies>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.2.8</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.32</version>
        </dependency>
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </dependency>
    </dependencies>
</project>

主配置文件SqlMapConfig.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>
    <!--引入外部属性文件-->
    <properties resource="db.properties"></properties>
    <!--配置别名-->
    <typeAliases>
        <package name="com.mybatis.model"></package>
    </typeAliases>
    <!--配置环境-->
    <environments default="mysql">
        <environment id="mysql">
            <!--事务-->
            <transactionManager type="JDBC"></transactionManager>
            <!--POOLED连接池-->
            <dataSource type="POOLED">
                <property name="driver" value="${jdbc.driver}"></property>
                <property name="url" value="${jdbc.url}" />
                <property name="username" value="${jdbc.username}" />
                <property name="password" value="${jdbc.password}" />
            </dataSource>
        </environment>
    </environments>
    <!--带有注解的dao接口所在位置-->
    <mappers>
        <package name="com.mybatis.dao"></package>
    </mappers>
    
</configuration>

db.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql:///mybatisdb
jdbc.username=root
jdbc.password=123456

实体类和接口

实体类
public class User {

    private Integer id;
    private String username;
    private String address;
    private String sex;
    private Date birthday;

    get/set方法
}
接口
package com.mybatis.dao;

import com.mybatis.model.User;
import org.apache.ibatis.annotations.Select;
import java.util.List;

public interface UserDao {

    @Select("select * from user")
    List<User> findAll();
}

测试方法

package com.mybatis.test;

import com.mybatis.dao.UserDao;
import com.mybatis.model.User;
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 org.junit.Test;

import java.io.IOException;
import java.io.InputStream;
import java.util.List;

public class MybatsiAnnotationTest {
    @Test
    public void test1() throws IOException {
        String resource = "SqlMapConfig.xml";
        //获取字节输入流
        InputStream is = Resources.getResourceAsStream(resource);
        //根据字节输入流构建SqlSessionFactory
        SqlSessionFactory factory =new  SqlSessionFactoryBuilder().build(is);
        //使用SqlSessionFactory生产一个SqlSession
        SqlSession session = factory.openSession();
        //使用SqlSession获取Dao的代理对象
        UserDao userDao = session.getMapper(UserDao.class);
        //执行方法
        List<User> list = userDao.findAll();
        for (User u:list) {
            System.out.println(u);
        }
        //释放资源
        session.close();
        is.close();

    }
}

日志log4j.properties

# Set root category priority to INFO and its only appender to CONSOLE.
#log4j.rootCategory=INFO, CONSOLE            debug   info   warn error fatal
log4j.rootCategory=debug, CONSOLE, LOGFILE

# Set the enterprise logger category to FATAL and its only appender to CONSOLE.
log4j.logger.org.apache.axis.enterprise=FATAL, CONSOLE

# CONSOLE is set to be a ConsoleAppender using a PatternLayout.
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern=%d{ISO8601} %-6r [%15.15t] %-5p %30.30c %x - %m\n

# LOGFILE is set to be a File appender using a PatternLayout.
log4j.appender.LOGFILE=org.apache.log4j.FileAppender
log4j.appender.LOGFILE.File=d:\axis.log
log4j.appender.LOGFILE.Append=true
log4j.appender.LOGFILE.layout=org.apache.log4j.PatternLayout
log4j.appender.LOGFILE.layout.ConversionPattern=%d{ISO8601} %-6r [%15.15t] %-5p %30.30c %x - %m\n