Mybatis01-易微帮

1.搭建mybatis框架环境

1.创建maven工程

2.导入相关pom依赖

3.Mybatis相关插件安装

4.Mybatis.cfg.xml配置

Pom.xml依赖

<maven.compiler.source>1.8</maven.compiler.source>

<maven.compiler.target>1.8</maven.compiler.target>

</properties>

<groupId>junit</groupId>

<artifactId>junit</artifactId>

</dependency>

<groupId>javax.servlet</groupId>

<artifactId>javax.servlet-api</artifactId>

<scope>provided</scope>

</dependency>

<groupId>org.mybatis</groupId>

<artifactId>mybatis</artifactId>

</dependency>

<groupId>mysql</groupId>

<artifactId>mysql-connector-java</artifactId>

</dependency>

<groupId>org.apache.logging.log4j</groupId>

</dependency>

<groupId>org.apache.logging.log4j</groupId>

</dependency>

<groupId>org.apache.logging.log4j</groupId>

</dependency>

</dependencies>

<build>

</includes>

</resource>

<directory>src/main/resources</directory>

<include>jdbc.properties</include>

</includes>

</resource>

</resources>

<groupId>org.mybatis.generator</groupId>

<artifactId>mybatis-generator-maven-plugin</artifactId>

<groupId>mysql</groupId>

<artifactId>mysql-connector-java</artifactId>

</dependency>

</dependencies>

</configuration>

</plugin>

</plugins>

</build>

Jdbc.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/mybatis_ssm?useUnicode=true&characterEncoding=UTF-8
jdbc.username=mybatis_ssm
jdbc.password=xiaoli

Web.xml

<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"

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

xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"

version="3.1"></web-app>

接下来安装以下插件

Free mybatis plugin

Mybatis generator

mybatis tools

maven helper

详细介绍

Intellij Idea Mybatis 插件(plugin和tools插件）_yangshijin1988的博客-CSDN博客_idea mapper 插件

mybatis.cfg.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>
    
    <properties resource="jdbc.properties"/>

    <settings>
        <setting name="logImpl" value="LOG4J2"/>
    </settings>

    
    <typeAliases>
        
    </typeAliases>

    
    <environments default="development">
        <environment id="development">
            
            <transactionManager type="jdbc"/>

            
            
            
            
            <dataSource type="POOLED">
                <property name="driver"
                          value="${jdbc.driver}"/>
                <property name="url"
                          value="${jdbc.url}"/>
                <property name="username" value="${jdbc.username}"/>
                <property name="password" value="${jdbc.password}"/>
            </dataSource>
        </environment>
    </environments>

    <mappers>
        <mapper resource="com/javaxl/mapper/BookMapper.xml"/>
    </mappers>
</configuration>

2.基于ssm逆向工程的使用（IDEA）

安装Mybatis generator插件
配置generatorConfig.xml
配置maven运行generator命令
在pom中处理generatorConfig.xml不能编译问题

generatorConfig.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
        "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd" >
<generatorConfiguration>
    
    <properties resource="jdbc.properties"/>

    
    <classPathEntry location="D:\\initPath\\mvn_repository\\mysql\\mysql-connector-java\\5.1.44\\mysql-connector-java-5.1.44.jar"/>

    
    <context id="infoGuardian">
        
        <commentGenerator>
            <property name="suppressAllComments" value="true"/>
            <property name="suppressDate" value="true"/> 
        </commentGenerator>

        
        <jdbcConnection driverClass="${jdbc.driver}"
                        connectionURL="${jdbc.url}" userId="${jdbc.username}" password="${jdbc.password}"/>

        
        <javaTypeResolver>
            
            <property name="forceBigDecimals" value="false"/>
        </javaTypeResolver>

        
        
        
        <javaModelGenerator targetPackage="com.javaxl.model"
                            targetProject="src/main/java">
            
            <property name="enableSubPackages" value="false"/>
            
            <property name="constructorBased" value="true"/>
            
            <property name="trimStrings" value="false"/>
            
            <property name="immutable" value="false"/>
        </javaModelGenerator>

        
        <sqlMapGenerator targetPackage="com.javaxl.mapper"
                         targetProject="src/main/java">
            
            <property name="enableSubPackages" value="false"/>
        </sqlMapGenerator>

        
        
        
        
        <javaClientGenerator targetPackage="com.javaxl.mapper"
                             targetProject="src/main/java" type="XMLMAPPER">
            
            <property name="enableSubPackages" value="false"/>
        </javaClientGenerator>

        
        
        
        
        
        
               
               
            
            
            
            
        

        <table schema="" tableName="t_mvc_Book" domainObjectName="Book"
               enableCountByExample="false" enableDeleteByExample="false"
               enableSelectByExample="false" enableUpdateByExample="false">
            
            
            
            
        </table>

    </context>
</generatorConfiguration>

mybatis-generator:generate -e

3.Mybatis增删改查案例

SessionUtil.java

package com.javaxl.util;

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

/**
* @author 小李飞刀
* @site www.javaxl.com
* @company xxx公司
* @create 2018-12-10 21:59
*/
public class SessionUtil {
    private static SqlSessionFactory sessionFactory;
    private static ThreadLocal<SqlSession> threadLocal = new ThreadLocal<SqlSession>();
    static {
        sessionFactory = new SqlSessionFactoryBuilder().build(SessionUtil.class.getResourceAsStream("/mybatis.cfg.xml"));
    }

    public static SqlSession openSession() {
        SqlSession session = threadLocal.get();
        if (null == session) {
            session = sessionFactory.openSession();
            threadLocal.set(session);
        }
        return session;
    }

    public static void main(String[] args) {
        SqlSession session = openSession();
        System.out.println(session.getConnection());
        session.close();
//        System.out.println(session.getConnection());
    }
}

BookService.java

package com.javaxl.service;

import com.javaxl.model.Book;

/**
* @author 小李飞刀
* @site www.javaxl.com
* @company
* @create 2019-09-19 15:30
*/
public interface BookService {
    int deleteByPrimaryKey(Integer bid);

    int insert(Book record);

    int insertSelective(Book record);

    Book selectByPrimaryKey(Integer bid);

    int updateByPrimaryKeySelective(Book record);

    int updateByPrimaryKey(Book record);
}

BookServiceImpl.java

package com.javaxl.service.impl;

import com.javaxl.mapper.BookMapper;
import com.javaxl.model.Book;
import com.javaxl.service.BookService;

/**
* @author 小李飞刀
* @site www.javaxl.com
* @company
* @create 2019-09-19 15:31
*/
public class BookServiceImpl implements BookService {
    private BookMapper bookMapper;

    public BookMapper getBookMapper() {
        return bookMapper;
    }

    public void setBookMapper(BookMapper bookMapper) {
        this.bookMapper = bookMapper;
    }

    @Override
    public int deleteByPrimaryKey(Integer bid) {
        return bookMapper.deleteByPrimaryKey(bid);
    }

    @Override
    public int insert(Book record) {
        return bookMapper.insert(record);
    }

    @Override
    public int insertSelective(Book record) {
        return bookMapper.insertSelective(record);
    }

    @Override
    public Book selectByPrimaryKey(Integer bid) {
        return bookMapper.selectByPrimaryKey(bid);
    }

    @Override
    public int updateByPrimaryKeySelective(Book record) {
        return bookMapper.updateByPrimaryKeySelective(record);
    }

    @Override
    public int updateByPrimaryKey(Book record) {
        return bookMapper.updateByPrimaryKey(record);
    }
}

BookServiceImplTest.java

package com.javaxl.test;

import com.javaxl.mapper.BookMapper;
import com.javaxl.model.Book;
import com.javaxl.service.BookService;
import com.javaxl.service.impl.BookServiceImpl;
import com.javaxl.util.SessionUtil;
import org.apache.ibatis.session.SqlSession;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

/**
* @author 小李飞刀
* @site www.javaxl.com
* @company
* @create 2019-09-19 15:35
*/
public class BookServiceImplTest {
    private BookService bookService;
    private SqlSession sqlSession;

    @Before
    public void setUp() throws Exception {
        BookServiceImpl bookServiceImpl = new BookServiceImpl();
        sqlSession = SessionUtil.openSession();
        bookServiceImpl.setBookMapper(sqlSession.getMapper(BookMapper.class));
        this.bookService = bookServiceImpl;
    }

    @After
    public void tearDown() throws Exception {
        sqlSession.commit();
        sqlSession.close();
    }

    @Test
    public void insert() {
        Book book = new Book();
        book.setBname("zzz");
        book.setPrice(99f);
        book.setBid(10003);
        int insert = bookService.insert(book);
    }

    @Test
    public void selectByPrimaryKey() {
        Book book = this.bookService.selectByPrimaryKey(66);
        System.out.println(book);

    }
}

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Mybatis01

目录

1.搭建mybatis框架环境

2.基于ssm逆向工程的使用（IDEA）

3.Mybatis增删改查案例

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