Mybatis_Class_No.1

Posted 2020-10-22 MESGOD纯贱

 

IBookDao

package MESGOD.dao.dao;
import MESGOD.dao.entity.Book;
import java.util.List;
public interface IBookDao {
    public List<Book>findAllBooks();
}

 

IBookDao.xml

 1 <?xml version="1.0" encoding="UTF-8" ?>
 2 <!DOCTYPE mapper
 3         PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
 4         "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
 5 
 6 
 7 <mapper namespace="MESGOD.dao.dao.IBookDao">
 8     <select id="findAllBooks" resultType="MESGOD.dao.entity.Book">
 9         select * from book
10     </select>
11 </mapper>

Book

package MESGOD.dao.entity;
public class Book {


    private Integer bookID;

    private String bookName;

    private String bookAuthor;

    private Integer bookPrice;


    public Integer getBookID() {
        return bookID;
    }

    public void setBookID(Integer bookID) {
        this.bookID = bookID;
    }

    public String getBookName() {
        return bookName;
    }

    public void setBookName(String bookName) {
        this.bookName = bookName;
    }

    public String getBookAuthor() {
        return bookAuthor;
    }

    public void setBookAuthor(String bookAuthor) {
        this.bookAuthor = bookAuthor;
    }

    public Integer getBookPrice() {
        return bookPrice;
    }

    public void setBookPrice(Integer bookPrice) {
        this.bookPrice = bookPrice;
    }



}

Test

package MESGOD.dao.Test;

import MESGOD.dao.entity.Book;
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 java.io.IOException;
import java.io.InputStream;
import java.util.List;


public class Test {

    public static void main(String[] args) {
        String path="mybatis-config.xml";
        //InputStream inputStream=null;

        try {
            InputStream is=Resources.getResourceAsStream(path);
            //MyBatis  为了 访问数据 库
            SqlSessionFactoryBuilder builder=new SqlSessionFactoryBuilder();
            //SessionFactory
            SqlSessionFactory factory=builder.build(is);

            SqlSession session = factory.openSession();
            List<Book> list = session.selectList("findAllBooks");
            for (Book book:list){
                System.out.println(book.getBookName()+"\\t"+book.getBookAuthor());
            }
            session.close();
        }catch (IOException e){
            e.printStackTrace();
        }

    }
}

 

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:///study"/>
                <property name="username" value="root"/>
                <property name="password" value=""/>
            </dataSource>
        </environment>
    </environments>
    <mappers>
        <mapper resource="MESGOD/dao/dao/IBookDao.xml"/>
    </mappers>
</configuration>

 

数据库

 

/*
SQLyog v10.2 
MySQL - 5.6.24 : Database - study
*********************************************************************
*/


/*!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*/`study` /*!40100 DEFAULT CHARACTER SET utf8 */;

USE `study`;

/*Table structure for table `book` */

DROP TABLE IF EXISTS `book`;

CREATE TABLE `book` (
  `bookId` int(11) NOT NULL AUTO_INCREMENT,
  `bookName` varchar(50) DEFAULT NULL,
  `bookAuthor` varchar(50) DEFAULT NULL,
  `bookPrice` int(11) DEFAULT NULL,
  PRIMARY KEY (`bookId`)
) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8;

/*Data for the table `book` */

insert  into `book`(`bookId`,`bookName`,`bookAuthor`,`bookPrice`) values (1,\'吉安娜的抉择\',\'卡莉。费奥林啊\',100),(2,\'思绪飘零\',\'微冷的雨\',200),(3,\'平凡的世界\',\'路遥\',300);

/*!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 */;