Netkiller Java 手札

关于《Netkiller Java 手札》

作者2002年开始在项目中使用Java，各种原因没有留下Java文档，2015因工作需要重新拾起Java并整理本文档。

我的系列文档

编程语言

Netkiller Architect 手札	Netkiller Developer 手札	Netkiller PHP 手札	Netkiller Python 手札	Netkiller Testing 手札	Netkiller Cryptography 手札
Netkiller Perl 手札	Netkiller Docbook 手札	Netkiller Project 手札	Netkiller Java 手札	Netkiller DevOps 手札

操作系统

Netkiller Linux 手札	Netkiller Debian 手札	Netkiller CentOS 手札	Netkiller FreeBSD 手札	Netkiller Shell 手札	Netkiller Security 手札
Netkiller Web 手札	Netkiller Monitoring 手札	Netkiller Storage 手札	Netkiller Mail 手札	Netkiller Multimedia 手札

数据库

Netkiller Database 手札	Netkiller PostgreSQL 手札	Netkiller MySQL 手札	Netkiller NoSQL 手札	Netkiller LDAP 手札

网络设备及其他

Netkiller Network 手札	Netkiller Cisco IOS 手札	Netkiller H3C 手札	Netkiller Amateur Radio 手札

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第 7 章 MyBatis

7.1. Mybatis 入门

http://blog.mybatis.org/

7.1. Mybatis 入门

创建数据库与表并插入测试数据

CREATE DATABASE `mybatis` /*!40100 COLLATE 'utf8_general_ci' */;

CREATE USER 'mybatis'@'192.168.%' IDENTIFIED BY 'mybatis';
GRANT USAGE ON *.* TO 'mybatis'@'192.168.%';
GRANT SELECT, EXECUTE, SHOW VIEW, ALTER, ALTER ROUTINE, CREATE, CREATE ROUTINE, CREATE TEMPORARY TABLES, CREATE VIEW, DELETE, DROP, EVENT, INDEX, INSERT, REFERENCES, TRIGGER, UPDATE, LOCK TABLES  ON `mybatis`.* TO 'mybatis'@'192.168.%' WITH GRANT OPTION;
FLUSH PRIVILEGES;
SHOW GRANTS FOR 'mybatis'@'192.168.%';


CREATE TABLE IF NOT EXISTS `user` (
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `name` varchar(50) DEFAULT NULL,
  `age` int(10) unsigned DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8;


INSERT INTO `user` (`id`, `name`, `age`) VALUES
	(1, 'Neo', 35),
	(2, 'Jerry', 36);

Maven pom.xml 中加入依赖包

	<dependencies>
		<dependency>
			<groupId>org.mybatis</groupId>
			<artifactId>mybatis</artifactId>
			<version>3.3.0</version>
		</dependency>
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>5.1.37</version>
		</dependency>
	</dependencies>

pom.xml

		<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>MyBatis</groupId>
	<artifactId>MyBatis</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<dependencies>
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>3.8.1</version>
			<scope>test</scope>
		</dependency>
		<dependency>
			<groupId>org.mybatis</groupId>
			<artifactId>mybatis</artifactId>
			<version>3.3.0</version>
		</dependency>
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>5.1.37</version>
		</dependency>
	</dependencies>
	<build>
		<sourceDirectory>src</sourceDirectory>
		<plugins>
			<plugin>
				<artifactId>maven-compiler-plugin</artifactId>
				<version>3.3</version>
				<configuration>
					<source>1.8</source>
					<target>1.8</target>
				</configuration>
			</plugin>
		</plugins>
	</build>
</project>

src/mybatis.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" />
			<!-- 配置数据库连接信息 -->
			<dataSource type="POOLED">
				<property name="driver" value="com.mysql.jdbc.Driver" />
				<property name="url" value="jdbc:mysql://192.168.6.1:3306/mybatis" />
				<property name="username" value="mybatis" />
				<property name="password" value="mybatis" />
			</dataSource>
		</environment>
	</environments>
	<mappers>

		<mapper resource="cn/netkiller/mapping/userMapping.xml" />
	</mappers>
</configuration>

src/cn/netkiller/mapping/userMapping.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="cn.netkiller.mapping.UserMapping">
	<select id="getUser" parameterType="String" resultType="cn.netkiller.model.User">
		select * from user where id=#{id}
	</select>
</mapper>

resultType 文件

		package cn.netkiller.model;

public class User {
	private String id;
	private String name;
	private int age;

	public String getId() {
		return id;
	}

	public void setId(String id) {
		this.id = id;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public int getAge() {
		return age;
	}

	public void setAge(int age) {
		this.age = age;
	}

	@Override
	public String toString() {
		return "User [id=" + id + ", name=" + name + ", age=" + age + "]";
	}
}

测试代码

		package cn.netkiller.test;

import java.io.InputStream;

import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import cn.netkiller.model.*;

public class Tests {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		String resource = "mybatis.xml";

		InputStream is = Tests.class.getClassLoader().getResourceAsStream(resource);
		SqlSessionFactory sessionFactory = new SqlSessionFactoryBuilder().build(is);
		SqlSession session = sessionFactory.openSession();

		String statement = "cn.netkiller.mapping.UserMapping.getUser";// 映射sql的标识字符串

		User user = session.selectOne(statement, "2");
		System.out.println(user.toString());
	}

}