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

---

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

<properties>
 
        <maven.compiler.source>1.8maven.compiler.source>
 
        <maven.compiler.target>1.8maven.compiler.target>
 
    properties>
 
    <dependencies>
 
        
 
        <dependency>
 
            <groupId>junitgroupId>
 
            <artifactId>junitartifactId>
 
            <version>4.12version>
 
            <scope>testscope>
 
        dependency>
 
        
 
        <dependency>
 
            <groupId>javax.servletgroupId>
 
            <artifactId>javax.servlet-apiartifactId>
 
            <version>4.0.0version>
 
            <scope>providedscope>
 
        dependency>
 
        
 
        <dependency>
 
            <groupId>org.mybatisgroupId>
 
            <artifactId>mybatisartifactId>
 
            <version>3.4.5version>
 
        dependency>
 
        
 
        <dependency>
 
            <groupId>mysqlgroupId>
 
            <artifactId>mysql-connector-javaartifactId>
 
            <version>5.1.44version>
 
        dependency>
 
        
 
        
 
        
 
        
 
        <dependency>
 
            <groupId>org.apache.logging.log4jgroupId>
 
            <artifactId>log4j-coreartifactId>
 
            <version>2.9.1version>
 
        dependency>
 
        <dependency>
 
            <groupId>org.apache.logging.log4jgroupId>
 
            <artifactId>log4j-apiartifactId>
 
            <version>2.9.1version>
 
        dependency>
 
        
 
        <dependency>
 
            <groupId>org.apache.logging.log4jgroupId>
 
            <artifactId>log4j-webartifactId>
 
            <version>2.9.1version>
 
        dependency>
 
dependencies>
 
 <build>
 
        <resources>
 
            
 
            <resource>
 
                <directory>src/main/javadirectory>
 
                <includes>
 
                    <include>**/*.xmlinclude>
 
                includes>
 
            resource>
 
            
 
            <resource>
 
                <directory>src/main/resourcesdirectory>
 
                <includes>
 
                    <include>jdbc.propertiesinclude>
 
                    <include>*.xmlinclude>
 
                includes>
 
            resource>
 
        resources>
 
        <plugins>
 
            <plugin>
 
                <groupId>org.mybatis.generatorgroupId>
 
                <artifactId>mybatis-generator-maven-pluginartifactId>
 
                <version>1.3.2version>
 
                <dependencies>
 
                    
 
                    <dependency>
 
                        <groupId>mysqlgroupId>
 
                        <artifactId>mysql-connector-javaartifactId>
 
                        <version>5.1.44version>
 
                    dependency>
 
                dependencies>
 
                <configuration>
 
                    <overwrite>trueoverwrite>
 
                configuration>
 
            plugin>
 
        plugins>
 
    build>

 Jdbc.properties

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

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 

mybatis.cfg.xml

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）

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

 generatorConfig.xml

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 敏杰
 */
public class SessionUtil {
    private static SqlSessionFactory sessionFactory;
    private static ThreadLocal threadLocal = new ThreadLocal();
    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 敏杰
 */
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 敏杰
 */
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 敏杰
 */
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);
 
    }
}