MyBatis 综合例子

步骤 1:创建数据库

/*

SQLyog Professional v12.08 (64 bit)

MySQL - 5.7.22-log : Database - mybatis

*********************************************************************

*/

/*!40101 SET NAMES utf8 */;

/*!40101 SET SQL_MODE=''*/;

/*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 */;

/*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */;

/*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */;

/*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */;

CREATE DATABASE /*!32312 IF NOT EXISTS*/`mybatis` /*!40100 DEFAULT CHARACTER SET utf8 */;

USE `mybatis`;

/*Table structure for table `author` */

DROP TABLE IF EXISTS `author`;

CREATE TABLE `author` (

  `id` int(11) NOT NULL AUTO_INCREMENT,

  `username` varchar(100) DEFAULT NULL,

  `password` varchar(100) DEFAULT NULL,

  `email` varchar(100) DEFAULT NULL,

  `bio` varchar(100) DEFAULT NULL,

  `favourite_section` varchar(100) DEFAULT NULL,

  PRIMARY KEY (`id`)

) ENGINE=InnoDB AUTO_INCREMENT=306 DEFAULT CHARSET=utf8;

/*Data for the table `author` */

insert  into `author`(`id`,`username`,`password`,`email`,`bio`,`favourite_section`) values (301,'克林顿','123456',' [email protected]','MyBatis团队成员','打球'),(302,'布兰登','123456',' [email protected]','MyBatis团队成员','听歌'),(303,'亚当','123456','[email protected]','MyBatis团队贡献者','游泳');

/*Table structure for table `blog` */

DROP TABLE IF EXISTS `blog`;

CREATE TABLE `blog` (

  `id` int(11) NOT NULL AUTO_INCREMENT,

  `title` varchar(100) DEFAULT NULL,

  `author_id` int(11) DEFAULT NULL,

  `content` varchar(1000) DEFAULT NULL,

  `state` varchar(100) DEFAULT NULL,

  `featured` int(11) DEFAULT NULL,

  PRIMARY KEY (`id`),

  KEY `author_id` (`author_id`)

) ENGINE=InnoDB AUTO_INCREMENT=104 DEFAULT CHARSET=utf8;

/*Data for the table `blog` */

insert  into `blog`(`id`,`title`,`author_id`,`content`,`state`,`featured`) values (101,'MyBatis',301,'MyBatis https://mybatis.org/mybatis-3/','ACTIVE',1),(102,'MyBatis Github',302,'MyBatis Github https://github.com/mybatis/mybatis-3/tree/master/src/site','ACTIVE',2),(103,'MyBatis Blog',303,'MyBatis Blog https://blog.mybatis.org/','INACTIVE',3);

/*Table structure for table `comment` */

DROP TABLE IF EXISTS `comment`;

CREATE TABLE `comment` (

  `id` int(11) NOT NULL AUTO_INCREMENT,

  `post_id` int(11) DEFAULT NULL,

  `name` varchar(100) DEFAULT NULL,

  `comment` varchar(100) DEFAULT NULL,

  PRIMARY KEY (`id`)

) ENGINE=InnoDB AUTO_INCREMENT=605 DEFAULT CHARSET=utf8;

/*Data for the table `comment` */

insert  into `comment`(`id`,`post_id`,`name`,`comment`) values (601,501,'好评1','看起来不错!谢谢@ kazuki43zoo!'),(602,502,'好评2','非常感谢您的帮助@ huan0huan!'),(603,503,'差评3','为什么不保留Java中SQL的灵活性和语法感觉?'),(604,504,'好评4','非常感谢您的解答');

/*Table structure for table `person` */

DROP TABLE IF EXISTS `person`;

CREATE TABLE `person` (

  `id` int(11) NOT NULL AUTO_INCREMENT,

  `username` varchar(100) DEFAULT NULL,

  `password` varchar(100) DEFAULT NULL,

  `full_name` varchar(100) DEFAULT NULL,

  `first_name` varchar(100) DEFAULT NULL,

  `last_name` varchar(100) DEFAULT NULL,

  `date_of_birth` date DEFAULT NULL,

  `created_on` date DEFAULT NULL,

  `update_on` date DEFAULT NULL,

  PRIMARY KEY (`id`)

) ENGINE=InnoDB AUTO_INCREMENT=204 DEFAULT CHARSET=utf8;

/*Data for the table `person` */

insert  into `person`(`id`,`username`,`password`,`full_name`,`first_name`,`last_name`,`date_of_birth`,`created_on`,`update_on`) values (201,'emacarron','123456','爱德华多·马卡龙','爱德华多','马卡龙','2000-01-01','2020-01-01','2020-01-02'),(202,'mnesarco','123456','弗兰克·马丁内斯','弗兰克','马丁内斯','2000-01-01','2020-01-01','2020-01-02'),(203,'agustafson','123456','安德鲁·古斯塔夫森','安德鲁','古斯塔夫森','2000-01-01','2020-01-01','2020-01-02');

/*Table structure for table `post` */

DROP TABLE IF EXISTS `post`;

CREATE TABLE `post` (

  `id` int(11) NOT NULL AUTO_INCREMENT,

  `blog_id` int(11) DEFAULT NULL,

  `author_id` int(11) DEFAULT NULL,

  `created_on` date DEFAULT NULL,

  `section` varchar(100) DEFAULT NULL,

  `subject` varchar(100) DEFAULT NULL,

  `draft` int(11) DEFAULT NULL,

  `body` varchar(1000) DEFAULT NULL,

  PRIMARY KEY (`id`)

) ENGINE=InnoDB AUTO_INCREMENT=505 DEFAULT CHARSET=utf8;

/*Data for the table `post` */

insert  into `post`(`id`,`blog_id`,`author_id`,`created_on`,`section`,`subject`,`draft`,`body`) values (501,101,301,'2020-02-01','1','MyBatis 3.5.1',1,'以下是用户可见更改的列表。用参数名称指定的keyProperty可能导致ExecutorException。#1485'),(502,102,302,'2020-02-02','2','MyBatis 3.5.2',1,'以下是用户可见更改的列表。SQL Builder现在支持LIMIT,OFFSET #1521和FETCH FIRST #1582。'),(503,103,303,'2020-02-03','3','MyBatis 3.5.3',1,'以下是用户可见更改的列表。在包含的的CDATA中支持变量替换。#1615'),(504,101,301,'2020-02-01','1','MyBatis 3.5.4',1,'以下是用户可见更改的列表。用参数名称指定的keyProperty可能导致ExecutorException。#4');

/*Table structure for table `post_tag` */

DROP TABLE IF EXISTS `post_tag`;

CREATE TABLE `post_tag` (

  `id` int(11) NOT NULL AUTO_INCREMENT,

  `post_id` int(11) DEFAULT NULL,

  `tag_id` int(11) DEFAULT NULL,

  PRIMARY KEY (`id`)

) ENGINE=InnoDB AUTO_INCREMENT=805 DEFAULT CHARSET=utf8;

/*Data for the table `post_tag` */

insert  into `post_tag`(`id`,`post_id`,`tag_id`) values (801,501,701),(802,502,702),(803,503,703),(804,504,704);

/*Table structure for table `tag` */

DROP TABLE IF EXISTS `tag`;

CREATE TABLE `tag` (

  `id` int(11) NOT NULL AUTO_INCREMENT,

  `name` varchar(100) DEFAULT NULL,

  PRIMARY KEY (`id`)

) ENGINE=InnoDB AUTO_INCREMENT=705 DEFAULT CHARSET=utf8;

/*Data for the table `tag` */

insert  into `tag`(`id`,`name`) values (701,'Alpha'),(702,'Beta'),(703,'RC'),(704,'GA');

/*Table structure for table `users` */

DROP TABLE IF EXISTS `users`;

CREATE TABLE `users` (

  `user_id` int(11) NOT NULL AUTO_INCREMENT,

  `user_name` varchar(100) DEFAULT NULL,

  `hashed_password` varchar(100) DEFAULT NULL,

  `email` varchar(100) DEFAULT NULL,

  PRIMARY KEY (`user_id`)

) ENGINE=InnoDB AUTO_INCREMENT=413 DEFAULT CHARSET=utf8;

/*Data for the table `users` */

insert  into `users`(`user_id`,`user_name`,`hashed_password`,`email`) values (401,'admin','123456','admin@@gmail.com'),(402,'user','123456','[email protected]'),(403,'guest','123456','[email protected]'),(411,'test','123456','[email protected]'),(412,'test2','123456','[email protected]');

/*Table structure for table `vehicle` */

DROP TABLE IF EXISTS `vehicle`;

CREATE TABLE `vehicle` (

  `id` int(11) NOT NULL AUTO_INCREMENT,

  `vin` varchar(100) DEFAULT NULL,

  `year` varchar(100) DEFAULT NULL,

  `make` varchar(100) DEFAULT NULL,

  `model` varchar(100) DEFAULT NULL,

  `color` varchar(100) DEFAULT NULL,

  `vehicle_type` int(11) DEFAULT NULL,

  `door_count` int(11) DEFAULT NULL,

  `box_size` int(11) DEFAULT NULL,

  PRIMARY KEY (`id`)

) ENGINE=InnoDB AUTO_INCREMENT=904 DEFAULT CHARSET=utf8;

/*Data for the table `vehicle` */

insert  into `vehicle`(`id`,`vin`,`year`,`make`,`model`,`color`,`vehicle_type`,`door_count`,`box_size`) values (901,'奔驰汽车','1883','德国奔驰汽车公司','AMG GT4','绿色',1,2,NULL),(902,'麦克卡车','1940','麦克制造公司','Mack NR','白色',2,NULL,4),(903,'雷诺货车','1941','美国雷诺货车公司','LCV','红色',3,NULL,NULL);

/* Procedure structure for procedure `getBlogsAndAuthors` */

/*!50003 DROP PROCEDURE IF EXISTS  `getBlogsAndAuthors` */;

DELIMITER $$

/*!50003 CREATE DEFINER=`root`@`localhost` PROCEDURE `getBlogsAndAuthors`(IN blog_id INT, IN author_id INT)

BEGIN

SELECT * FROM BLOG WHERE ID = blog_id;

SELECT * FROM AUTHOR WHERE ID = author_id;

END */$$

DELIMITER ;

/* Procedure structure for procedure `getBlogsAndPosts` */

/*!50003 DROP PROCEDURE IF EXISTS  `getBlogsAndPosts` */;

DELIMITER $$

/*!50003 CREATE DEFINER=`root`@`localhost` PROCEDURE `getBlogsAndPosts`(IN in_id INT)

BEGIN

SELECT * FROM BLOG WHERE ID = in_id;

SELECT * FROM POST WHERE BLOG_ID = in_id;

END */$$

DELIMITER ;

/*!40101 SET SQL_MODE=@OLD_SQL_MODE */;

/*!40014 SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS */;

/*!40014 SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS */;

/*!40111 SET SQL_NOTES=@OLD_SQL_NOTES */;

步骤 2:使用IDE创建Maven项目

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">

4.0.0

org.mybatis

example

0.0.1-SNAPSHOT

example

example

org.mybatis

mybatis

3.5.4

mysql

mysql-connector-java

5.1.48

log4j

log4j

1.2.17

junit

junit

4.12

步骤 3:配置MyBatis

driver=com.mysql.jdbc.Driver

url=jdbc:mysql://127.0.0.1:3306/mybatis

username=root

password_dev=123456

password_pro=12345678

  PUBLIC "-//mybatis.org//DTD Config 3.0//EN"

  "http://mybatis.org/dtd/mybatis-3-config.dtd">

# 全局日志配置

log4j.rootLogger=ERROR, stdout

# MyBatis 日志配置

log4j.logger.org.mybatis.example=DEBUG

# 控制台输出

log4j.appender.stdout=org.apache.log4j.ConsoleAppender

log4j.appender.stdout.layout=org.apache.log4j.PatternLayout

log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n

步骤 4:创建MyBatis工具类

package org.mybatis.example.util;

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;

/**

* MyBatis工具类

*

* @author 大强

*

*/

public class MyBatisUtil {

public static SqlSessionFactory sqlSessionFactory;

static {

try {

// 从类路径下加载资源文件mybatis-config.xml

String resource = "org/mybatis/example/mybatis-config.xml";

InputStream inputStream = Resources.getResourceAsStream(resource);

// 由 SqlSessionFactoryBuilder创建SqlSessionFactory

sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);

} catch (IOException e) {

e.printStackTrace();

}

}

/**

* 由 SqlSessionFactory创建SqlSession

*

* @return

*/

public static SqlSession getSqlSession() {

return sqlSessionFactory.openSession();

}

/**

* 关闭SqlSession

*

* @param sqlSession

*/

public static void closeSqlSession(SqlSession sqlSession) {

if (sqlSession != null) {

sqlSession.close();

}

}

}

步骤 5:创建POJO类

package org.mybatis.example.domain;

/**

* 作者POJO类

*

* @author 大强

*

*/

public class Author {

public int id;

// public int authorid;

public String username;

public String password;

public String email;

public String bio;

public String favouriteSection;

// public int getAuthorid() {

// return authorid;

// }

//

// public void setAuthorid(int authorid) {

// this.authorid = authorid;

// }

public int getId() {

return id;

}

public void setId(int id) {

this.id = id;

}

public String getUsername() {

return username;

}

public void setUsername(String username) {

this.username = username;

}

public String getPassword() {

return password;

}

public void setPassword(String password) {

this.password = password;

}

public String getEmail() {

return email;

}

public void setEmail(String email) {

this.email = email;

}

public String getBio() {

return bio;

}

public void setBio(String bio) {

this.bio = bio;

}

public String getFavouriteSection() {

return favouriteSection;

}

public void setFavouriteSection(String favouriteSection) {

this.favouriteSection = favouriteSection;

}

}

package org.mybatis.example.domain;

import java.util.List;

/**

* 博客POJO类

*

* @author 大强

*

*/

public class Blog {

public int id;

public String title;

public String authorId;

public String content;

public String state;

// 一对一

// 作者

public Author author;

// 一对多

// 文章

public List posts;

public Blog(Integer id) {

super();

this.id = id;

}

public int getId() {

return id;

}

public void setId(int id) {

this.id = id;

}

public String getTitle() {

return title;

}

public void setTitle(String title) {

this.title = title;

}

public String getAuthorId() {

return authorId;

}

public void setAuthorId(String authorId) {

this.authorId = authorId;

}

public String getContent() {

return content;

}

public void setContent(String content) {

this.content = content;

}

public Author getAuthor() {

return author;

}

public void setAuthor(Author author) {

this.author = author;

}

public List getPosts() {

return posts;

}

public void setPosts(List posts) {

this.posts = posts;

}

public String getState() {

return state;

}

public void setState(String state) {

this.state = state;

}

}

package org.mybatis.example.domain;

/**

* 汽车POJO类

*

* @author 大强

*

*/

public class Car extends Vehicle {

// Car

public String doorCount;

public String getDoorCount() {

return doorCount;

}

public void setDoorCount(String doorCount) {

this.doorCount = doorCount;

}

}

package org.mybatis.example.domain;

/**

* 评论POJO类

*

* @author 大强

*

*/

public class Comment {

public int id;

public int postId;

public String name;

public String comment;

public int getId() {

return id;

}

public void setId(int id) {

this.id = id;

}

public int getPostId() {

return postId;

}

public void setPostId(int postId) {

this.postId = postId;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public String getComment() {

return comment;

}

public void setComment(String comment) {

this.comment = comment;

}

}

package org.mybatis.example.domain;

/**

* 草稿文章POJO类

*

* @author 大强

*

*/

public class DraftPost extends Post {

public String draftBody;

public String getDraftBody() {

return draftBody;

}

public void setDraftBody(String draftBody) {

this.draftBody = draftBody;

}

}

package org.mybatis.example.domain;

import java.util.Date;

/**

* 人员POJO类

*

* @author 大强

*

*/

public class Person {

public int id;

public String username;

public String password;

public String fullName;

public String firstName;

public String lastName;

public Date dateOfBirth;

public Date createdOn;

public Date updateOn;

public int getId() {

return id;

}

public void setId(int id) {

this.id = id;

}

public String getUsername() {

return username;

}

public void setUsername(String username) {

this.username = username;

}

public String getPassword() {

return password;

}

public void setPassword(String password) {

this.password = password;

}

public String getFullName() {

return fullName;

}

public void setFullName(String fullName) {

this.fullName = fullName;

}

public String getFirstName() {

return firstName;

}

public void setFirstName(String firstName) {

this.firstName = firstName;

}

public String getLastName() {

return lastName;

}

public void setLastName(String lastName) {

this.lastName = lastName;

}

public Date getDateOfBirth() {

return dateOfBirth;

}

public void setDateOfBirth(Date dateOfBirth) {

this.dateOfBirth = dateOfBirth;

}

public Date getCreatedOn() {

return createdOn;

}

public void setCreatedOn(Date createdOn) {

this.createdOn = createdOn;

}

public Date getUpdateOn() {

return updateOn;

}

public void setUpdateOn(Date updateOn) {

this.updateOn = updateOn;

}

}

package org.mybatis.example.domain;

import java.util.Date;

import java.util.List;

/**

* 文章POJO类

*

* @author 大强

*

*/

public class Post {

public int id;

public int blogId;

public int authorId;

public Date createdOn;

public String section;

public String subject;

public String draft;

public String body;

public Author author;

public List comments;

public List tags;

public int getId() {

return id;

}

public void setId(int id) {

this.id = id;

}

public int getBlogId() {

return blogId;

}

public void setBlogId(int blogId) {

this.blogId = blogId;

}

public int getAuthorId() {

return authorId;

}

public void setAuthorId(int authorId) {

this.authorId = authorId;

}

public Date getCreatedOn() {

return createdOn;

}

public void setCreatedOn(Date createdOn) {

this.createdOn = createdOn;

}

public String getSection() {

return section;

}

public void setSection(String section) {

this.section = section;

}

public String getSubject() {

return subject;

}

public void setSubject(String subject) {

this.subject = subject;

}

public String getDraft() {

return draft;

}

public void setDraft(String draft) {

this.draft = draft;

}

public String getBody() {

return body;

}

public void setBody(String body) {

this.body = body;

}

public List getComments() {

return comments;

}

public void setComments(List comments) {

this.comments = comments;

}

public List getTags() {

return tags;

}

public void setTags(List tags) {

this.tags = tags;

}

public Author getAuthor() {

return author;

}

public void setAuthor(Author author) {

this.author = author;

}

}

package org.mybatis.example.domain;

/**

* 标签POJO类

*

* @author 大强

*

*/

public class Tag {

public int id;

public String name;

public int getId() {

return id;

}

public void setId(int id) {

this.id = id;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

}

package org.mybatis.example.domain;

/**

* 卡车POJO类

*

* @author 大强

*

*/

public class Truck extends Vehicle {

// Truck

public String boxSize;

public String getBoxSize() {

return boxSize;

}

public void setBoxSize(String boxSize) {

this.boxSize = boxSize;

}

}

package org.mybatis.example.domain;

/**

* 用户POJO类

*

* @author 大强

*

*/

public class User {

public int id;

public String username;

public String password;

// public String hashedPassword;

public String email;

// public User(Integer id, String username, String password) {

// super();

// this.id = id;

// this.username = username;

// this.password = password;

// }

public int getId() {

return id;

}

public void setId(int id) {

this.id = id;

}

public String getUsername() {

return username;

}

public void setUsername(String username) {

this.username = username;

}

public String getPassword() {

return password;

}

public void setPassword(String password) {

this.password = password;

}

// public String getHashedPassword() {

// return hashedPassword;

// }

//

// public void setHashedPassword(String hashedPassword) {

// this.hashedPassword = hashedPassword;

// }

public String getEmail() {

return email;

}

public void setEmail(String email) {

this.email = email;

}

}

package org.mybatis.example.domain;

/**

* 车辆POJO类

*

* @author 大强

*

*/

public class Vehicle {

public int id;

public String vin;

public String year;

public String make;

public String model;

public String color;

// 1:Car 2:Truck

public String vehicleType;

// Car

// public String doorCount;

// Truck

// public String boxSize;

public int getId() {

return id;

}

public void setId(int id) {

this.id = id;

}

public String getVin() {

return vin;

}

public void setVin(String vin) {

this.vin = vin;

}

public String getYear() {

return year;

}

public void setYear(String year) {

this.year = year;

}

public String getMake() {

return make;

}

public void setMake(String make) {

this.make = make;

}

public String getModel() {

return model;

}

public void setModel(String model) {

this.model = model;

}

public String getColor() {

return color;

}

public void setColor(String color) {

this.color = color;

}

public String getVehicleType() {

return vehicleType;

}

public void setVehicleType(String vehicleType) {

this.vehicleType = vehicleType;

}

}

步骤 6:创建映射器接口类

package org.mybatis.example.mapper;

import java.util.List;

import org.mybatis.example.domain.Blog;

/**

* 博客映射器

*

* @author 大强

*

*/

public interface BlogMapper {

List selectBlogDetails(int id);

}

步骤 7:创建映射器XML文件

  PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"

  "http://mybatis.org/dtd/mybatis-3-mapper.dtd">

column="author_favourite_section" />

package org.mybatis.example.mapper;

import java.util.List;

import org.apache.ibatis.session.SqlSession;

import org.apache.log4j.Logger;

import org.junit.Test;

import org.mybatis.example.domain.Blog;

import org.mybatis.example.util.MyBatisUtil;

/**

* Author测试类

*

* @author 大强

*

*/

public class BlogMapperTest {

Logger logger = Logger.getLogger(BlogMapperTest.class);

// 注意:选中方法名,单击鼠标右键,选择 Run as -> JUnit Test,就能执行单个方法。

/**

* 非常复杂的结果映射测试方法

*/

@Test

public void detailedBlogResultMapTest() {

logger.info("非常复杂的结果映射开始...");

SqlSession session = MyBatisUtil.getSqlSession();

BlogMapper mapper = session.getMapper(BlogMapper.class);

List list = mapper.selectBlogDetails(101);

if (list != null) {

for (Blog blog : list) {

logger.info(blog.getId());

logger.info(blog.getTitle());

}

}

MyBatisUtil.closeSqlSession(session);

logger.info("非常复杂的结果映射结束");

}

}

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