Spring Boot整合tk.mybatis及pageHelper分页插件及mybatis逆向工程

Spring Boot整合druid数据源

1）引入依赖

<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>druid-spring-boot-starter</artifactId>
    <version>1.1.10</version>
</dependency>
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <scope>runtime</scope>
</dependency>

2）application.properties引入配置

# datasource config
spring.datasource.druid.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.druid.url=jdbc:mysql://localhost:3306/test?serverTimezone=UTC&useUnicode=true&characterEncoding=utf8
spring.datasource.druid.username=root
spring.datasource.druid.password=123

spring.datasource.druid.initial-size=5
spring.datasource.druid.min-idle=5
spring.datasource.druid.max-active=20

spring.datasource.druid.test-on-borrow=true

3）整合MyBatis

tk.mybatis是在MyBatis的基础上提供了很多工具，让开发更加高效

• 添加依赖

<!-- 整合tk.mybatis -->
<dependency>
    <groupId>tk.mybatis</groupId>
    <artifactId>mapper-spring-boot-starter</artifactId>
    <version>2.0.2</version>
</dependency>

• application.properties中添加mybatis的配置

mybatis.type-aliases-package=com.fei.entity
mybatis.mapper-locations=classpath:mapper/*.xml

• 创建通用的父级接口

package tk.mybatis;

import tk.mybatis.mapper.common.Mapper;
import tk.mybatis.mapper.common.MySqlMapper;

/**
 * 自己的Mapper，特别注意不能被扫描到，否则会出错
 * Created by zxf on 2019年10月16日
 */
public interface MyMapper<T> extends Mapper<T>, MySqlMapper<T>{

}

4）整合PageHelper分页插件

PageHelper是MyBatis的分页插件，支持多数据源，多数据库，可以简化数据库的分页查询操作，整合过程极其简单，只需要引入依赖即可。

• 引入依赖

<dependency>
    <groupId>com.github.pagehelper</groupId>
    <artifactId>pagehelper-spring-boot-starter</artifactId>
    <version>1.2.5</version>
</dependency>

5）配置逆向工程代码自动生成

1. 引入依赖插件

<!-- MyBatis 逆向工程 插件配置start -->
<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>
        <verbose>true</verbose><!-- 允许移动生成的文件 -->
        <overwrite>true</overwrite><!-- 是否覆盖 -->
    </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><!-- MyBatis 逆向工程 插件配置end -->

2. 代码生成器配置文件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>
	<!-- 引入 jdbc.properties数据库连接配置 -->
	<properties resource="jdbc.properties" />
	
	<!-- MyBatis3Simple：不生成 Example相关类及方法 -->
	<context id="Mysql" targetRuntime="MyBatis3Simple" defaultModelType="flat">
		<property name="beginningDelimiter" value="`" />
		<property name="endingDelimiter" value="`" />
		
		<!-- 指定生成 Mapper 的继承模板 tk.mybatis插件 -->
		<plugin type="tk.mybatis.mapper.generator.MapperPlugin">
			<property name="mappers" value="tk.mybatis.MyMapper" />
		</plugin>
		
		<!-- jdbc 数据库连接配置 -->
		<jdbcConnection
			driverClass="${jdbc.driver-class-name}"
			connectionURL="${jdbc.url}"
			userId="${jdbc.username}"
			password="${jdbc.password}">
		</jdbcConnection>

		<!-- 配置数据库表实体类存放路径 -->
		<javaModelGenerator targetPackage="com.fei.entity" targetProject="src/main/java" />
		
		<!-- 配置XxxMapper.xml文件存放路径 -->
		<sqlMapGenerator targetPackage="mapper" targetProject="src/main/resources" />
		
		<!-- 配置XxxMapper实体接口存放路径 -->
		<javaClientGenerator
			targetPackage="com.fei.dao"
			targetProject="src/main/java" type="XMLMAPPER" />
			
		<!-- 配置需要生成的表 -->
		<!-- tableName：数据库表名，%代表所有，domainObjectName：生成文件名 ，schema：数据源 -->
		<table tableName="tb_item">
			<generatedKey column="id" sqlStatement="Mysql" identity="true" />
		</table>
		
	</context>

</generatorConfiguration>

3. jdbc.properties

jdbc.driver-class-name=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/web13?serverTimezone=UTC&useUnicode=true&characterEncoding=utf8
jdbc.username=root
jdbc.password=123

4. 插件自动成命令

mvn mybatis-generator:generate 

在STS中，项目右键-Run as->Maven Build...->Goals处输入：mybatis-generator:generate ，run即可

整合mybatis、分页插件、逆向工程及druid数据源完整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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.1.9.RELEASE</version>
		<relativePath /> <!-- lookup parent from repository -->
	</parent>
	<groupId>com.fei</groupId>
	<artifactId>spring-boot-mybatis-druid</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>spring-boot-mybatis-druid</name>
	<description>My project for Spring Boot</description>

	<properties>
		<java.version>1.8</java.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>

		<!-- 整合数据源 -->
		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>druid-spring-boot-starter</artifactId>
			<version>1.1.10</version>
		</dependency>
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<scope>runtime</scope>
		</dependency>

		<!-- 整合tk.mybatis及分页插件 -->
		<dependency>
			<groupId>tk.mybatis</groupId>
			<artifactId>mapper-spring-boot-starter</artifactId>
			<version>2.0.2</version>
		</dependency>
		<dependency>
			<groupId>com.github.pagehelper</groupId>
			<artifactId>pagehelper-spring-boot-starter</artifactId>
			<version>1.2.5</version>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>

	</dependencies>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>

			<!-- MyBatis 逆向工程 插件配置start -->
			<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>
					<verbose>true</verbose><!-- 允许移动生成的文件 -->
					<overwrite>true</overwrite><!-- 是否覆盖 -->
				</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><!-- MyBatis 逆向工程 插件配置end -->

		</plugins>
	</build>

</project>