springboot2.x——集成mybatis和druid连接池

springboot2.x——集成mybatis和druid连接池

• 　引入mybatis和druid依赖
•    配置打包方式
•    配置mybatis自动生成插件

　　完整的pom.xml

　　

<?xml version="1.0" encoding="UTF-8"?>
<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>com.baiye</groupId>
    <artifactId>spring-boot-mybatis</artifactId>
    <version>1.0.0-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>spring-boot-mybatis</name>
    <description></description>

    <parent>
        <groupId>com.baiye</groupId>
        <artifactId>spring-boot-dependencies</artifactId>
        <version>1.0.0-SNAPSHOT</version>
        <relativePath>../spring-boot-dependencies/pom.xml</relativePath>
    </parent>

    <properties>
        <!--update：2018-6-24-->
        <lombok.version>1.16.18</lombok.version>
    </properties>

    <dependencies>

        <!--集成druid & mybatis start-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.1.10</version>
        </dependency>
        <dependency>
            <groupId>tk.mybatis</groupId>
            <artifactId>mapper-spring-boot-starter</artifactId>
            <version>2.0.2</version>
        </dependency>
        <!--分页插件-->
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper-spring-boot-starter</artifactId>
            <version>1.2.5</version>
        </dependency>
        <!--集成druid & mybatis end-->
        <!--继承 lombok start-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>${lombok.version}</version>
            <scope>provided</scope>
        </dependency>
        <!--集成 lombok  end-->
    </dependencies>

    <build>
        <plugins>
            <!--maven 打包插件-->
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <mainClass>com.baiye.spring.boot.mybatis.SpringBootMybatisApplication</mainClass>
                </configuration>
            </plugin>
            <!--mybatis自动生成插件-->
            <plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.5</version>
                <configuration>
                    <configurationFile>${basedir}/src/main/resources/generator/generatorConfig.xml</configurationFile>
                    <overwrite>true</overwrite>
                    <verbose>true</verbose>
                </configuration>
                <dependencies>
                    <dependency>
                        <groupId>mysql</groupId>
                        <artifactId>mysql-connector-java</artifactId>
                        <version>${mysql.version}</version>
                    </dependency>
                    <dependency>
                        <groupId>tk.mybatis</groupId>
                        <artifactId>mapper</artifactId>
                        <version>3.4.4</version>
                    </dependency>
                </dependencies>
            </plugin>
        </plugins>
    </build>

</project>

重点：

　　注意mybatis代码自动生成插件的xml文件(generatorConfig.xml)路径于pom配置匹配

　　注意generatorConfig.xml生成的entity、dao、xml等文件要与项目的包匹配，数据库名称、密码、表等需要一致！！！

　　完整的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>
    <!-- 数据库驱动:选择你的本地硬盘上面的数据库驱动包-->
    <classPathEntry  location="D:\Repositories\Maven\mysql\mysql-connector-java\5.1.29"/>
    <context id="DB2Tables"  targetRuntime="MyBatis3">
        <commentGenerator>
            <property name="suppressDate" value="true"/>
            <!-- 是否去除自动生成的注释 true：是 ： false:否 -->
            <property name="suppressAllComments" value="true"/>
        </commentGenerator>
        <!--数据库链接URL，用户名、密码 -->
        <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://127.0.0.1(ip地址)/springbootdemo" userId="xxx" password="xxx">
        </jdbcConnection>
        <javaTypeResolver>
            <property name="forceBigDecimals" value="false"/>
        </javaTypeResolver>
        <!-- 生成模型的包名和位置-->
        <javaModelGenerator targetPackage="com.baiye.spring.boot.mybatis.entity" targetProject="src/main/java">
            <property name="enableSubPackages" value="true"/>
            <property name="trimStrings" value="true"/>
        </javaModelGenerator>
        <!-- 生成映射文件的包名和位置-->
        <sqlMapGenerator targetPackage="mapper" targetProject="src/main/resources">
            <property name="enableSubPackages" value="true"/>
        </sqlMapGenerator>
        <!-- 生成DAO的包名和位置-->
        <javaClientGenerator type="XMLMAPPER" targetPackage="com.baiye.spring.boot.mybatis.mapper" targetProject="src/main/java">
            <property name="enableSubPackages" value="true"/>
        </javaClientGenerator>
        <!-- 要生成的表 tableName是数据库中的表名或视图名 domainObjectName是实体类名-->
        <table tableName="t_teacher" domainObjectName="Teacher" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false"></table>
    </context>
</generatorConfiguration>

yml文件的配置：

　　自行修改数据库名称、密码、mapper文件的扫描路径

server:
  port: 8080
spring:
  datasource:
    druid:
      url: jdbc:mysql://127.0.0.1:3306/springbootdemo?useUnicode=true&characterEncoding=utf-8&useSSL=false
      username: xxx 
      password: xxx  
      initial-size: 1
      min-idle: 1
      max-active: 20
      test-on-borrow: true
      driver-class-name: com.mysql.jdbc.Driver
mybatis:
    type-aliases-package: com.spring.boot.mybatis.entity
    mapper-locations: classpath:mapper/*.xml

springboot的Junit测试两个关键注解：

@RunWith(SpringRunner.class)
@SpringBootTest(classes = SpringBootMybatisApplication.class) 

package com.baiye.spring.boot.mybatis;

import com.baiye.spring.boot.mybatis.entity.Teacher;
import com.baiye.spring.boot.mybatis.mapper.TeacherMapper;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

@RunWith(SpringRunner.class)
//SpringBootMybatisApplication 程序的入口类
@SpringBootTest(classes = SpringBootMybatisApplication.class)
public class MybatisCrudTest {

    @Autowired
    private TeacherMapper teacherMapper;

    @Test
    public void getInfo(){
        Teacher teacher = teacherMapper.selectByPrimaryKey(201L);
        System.out.println(teacher.getTName());
        System.out.println(teacher.getTAddress());
    }
}

最后，项目的目录结构如下：