Preface:

This project is built based on Maven, using Mybatis -spring-boot as the persistence layer framework of spring-boot project

The mybatis persistence framework used in spring-boot is not the same as the original Spring project in terms of usage and annotation, and needs to rely on mybatis-spring-boot package

1. Introduce Mybatis and database and other project dependencies

1.1. Introduce myBatis dependency

<! -- mybatis-spring-boot -->
    <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.1.1</version>
    </dependency>
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1.2. Introduce mysql driver

<! -- mysql-->
    <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
    </dependency>
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1.3 Overview of project POM.xml

<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/maven-v4_0_0.xsd">
 
	<modelVersion>4.0.0</modelVersion>
 
	<groupId>cn.eguid.carDeviceInfoSys</groupId>
	<artifactId>carSys-web</artifactId>
	<packaging>war</packaging>
	<version>1.4.0 - the SNAPSHOT</version>
	<name>carSys-web</name>
 
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.4.0. RELEASE</version>
	</parent>
 
	<dependencies>
		<! -- spring-boot web -->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
			<! --<exclusions> <exclusion> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-tomcat</artifactId> </exclusion> </exclusions> -->
		</dependency>
		<! -- spring aop -->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-aop</artifactId>
		</dependency>
		<! -- mysql-->
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-jdbc</artifactId>
		</dependency>
		<! -- https://mvnrepository.com/artifact/redis.clients/jedis -->
		<dependency>
			<groupId>redis.clients</groupId>
			<artifactId>jedis</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>
		<dependency>
			<groupId>com.jayway.jsonpath</groupId>
			<artifactId>json-path</artifactId>
			<scope>test</scope>
		</dependency>
		<! -- mybatis-spring-boot -->
		<dependency>
			<groupId>org.mybatis.spring.boot</groupId>
			<artifactId>mybatis-spring-boot-starter</artifactId>
			<version>1.1.1</version>
		</dependency>
 
		<! -- fastjson -->
		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>fastjson</artifactId>
			<version>1.2.17</version>
		</dependency>
		
		<dependency>
			<groupId>dom4j</groupId>
			<artifactId>dom4j</artifactId>
			<version>1.6.1</version>
		</dependency>
 
	</dependencies>
 
	<profiles>
		<profile>
			<id>production</id>
			<dependencies>
				<! -- This sample is a test for the autoconfig when commons-pool is *absent*. In production it would be useful to enable pooling by using this dependency. -->
				<dependency>
					<groupId>commons-pool</groupId>
					<artifactId>commons-pool</artifactId>
					<type>pom.lastUpdated</type>
				</dependency>
			</dependencies>
		</profile>
	</profiles>
 
	<! -- Package as an executable jar -->
	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>
	<repositories>
		<repository>
			<id>spring-releases</id>
			<url>https://repo.spring.io/libs-release</url>
		</repository>
	</repositories>
	<pluginRepositories>
		<pluginRepository>
			<id>spring-releases</id>
			<url>https://repo.spring.io/libs-release</url>
		</pluginRepository>
	</pluginRepositories>
</project>
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2. Configure database connection parameters, set the mappers package of Mybatis and the spring-boot service parameter configuration

Create an application.properties file under the project root to define the parameters associated with Spring-boot and the database parameters, and to configure the mappers scan path for Mybatis

For maven projects, application.properties is placed in the SRC /main/resource/ directory

The configuration is as follows:

spring.datasource.url=JDBC: mysql: / / 127.0.0.1:3306 / test
spring.datasource.username=root
spring.datasource.password=eguid
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.max-idle=5
spring.datasource.max-wait=10000
spring.datasource.min-idle=1
spring.datasource.initial-size=3

server.port=8088
server.session.timeout=10
server.tomcat.max-threads=800
server.tomcat.uri-encoding=UTF-8

mybatis.mapperLocations=classpath:cn/eguid/carSysWEB/mappers/*.xml
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3, Mybatis DAO interface and mapper. XML implementation

3.1 define the DAO interface of MyBatis

This interface is different from the Mybatis – Spring approach and requires an @mapper annotation.

The @mapper annotation is used to declare this interface to be the DAO interface of Mybatis.

package cn.eguid.carSysWeb.dao;
 
import java.util.List;
 
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;
 
import cn.eguid.carSysWeb.entity.DepInfo;
// Declare this interface as the DAO interface of Mybatis with Mapper annotations
@Mapper
public interface GetInfoDao {
 
	public List<DepInfo> getRootInfo(a);
 
	public List<DepInfo> getDepInfo(@Param(value = "parentCoding") String org_parent_coding);
	
	public List<DepInfo> getDepInfoById(@Param(value="dep_id") String dep_id);
}
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3.2 Mapper.xml corresponding to dao interface

Mapper. XML is written in the same way as mybatis

<! DOCTYPEmapper
    PUBLIC "- / / mybatis.org//DTD Mapper / 3.0 / EN"
    "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
 
<mapper namespace="cn.eguid.carSysWeb.dao.GetInfoDao">
 <resultMap type="cn.eguid.carSysWeb.entity.DepInfo" id="depMap">
		<id column="org_coding" property="dep_id"/>
		<result column="org_name" property="dep_name"/>
		<result column="org_parent_coding" property="dep_parent_coding"/>
		<result column="last_time" property="last_time"/>
	</resultMap>
<select id="getRootInfo" resultMap="depMap">
select * from car_organization where org_parent_coding is null
</select>
<select id="getDepInfo" parameterType="string" resultMap="depMap">
SELECT * FROM car_organization where org_parent_coding=#{parentCoding,jdbcType=VARCHAR}
</select>
<select id="getDepInfoById" parameterType="string" resultMap="depMap">
SELECT * FROM car_organization where org_coding=#{dep_id}
</select>
</mapper>
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Supplement:

After the above steps, you can directly inject the DAO implementation of Mybatis in the service through spring IOC annotation. My DAO interface here is GetInfoDao, so if you inject ‘GetInfoDao’, you can correctly reference the persistence layer.

Note: The @ComponentScan annotation must be enabled in the spring-Boot entry class to scan all annotations in the project

package cn.eguid.carSysWeb;
 
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
 
import org.springframework.context.annotation.ComponentScan;
 
@SpringBootApplication
// Enable general annotation scanning
@ComponentScan
public class Application extends org.springframework.boot.web.support.SpringBootServletInitializer {
	/ * * * implementation SpringBootServletInitializer can let spring - the boot program running in the web container * /
	@Override
	protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
		builder.sources(this.getClass());
		return super.configure(builder);
	}
 
	public static void main(String[] args) { SpringApplication.run(Application.class, args); }}Copy the code

5. Conclusion:

To use mabatis in the spring-boot project, you need to rely on mybatis-spring-boot
You need to define the database connection parameters in application.xml and the mappers file scan path for Mybatis
Mybatis DAO interface needs to add @mapper annotation in order to be correctly scanned by Spring-boot
The annotation that spring-boot turns on annotation scanning is @ComponentScan

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How to use myabtis persistence layer framework in spring-boot

Preface:

1. Introduce Mybatis and database and other project dependencies

1.1. Introduce myBatis dependency

1.2. Introduce mysql driver

1.3 Overview of project POM.xml

2. Configure database connection parameters, set the mappers package of Mybatis and the spring-boot service parameter configuration

3, Mybatis DAO interface and mapper. XML implementation

3.1 define the DAO interface of MyBatis

3.2 Mapper.xml corresponding to dao interface

Supplement:

5. Conclusion:

How to use myabtis persistence layer framework in spring-boot

Preface:

1. Introduce Mybatis and database and other project dependencies

1.1. Introduce myBatis dependency

1.2. Introduce mysql driver

1.3 Overview of project POM.xml

2. Configure database connection parameters, set the mappers package of Mybatis and the spring-boot service parameter configuration

3, Mybatis DAO interface and mapper. XML implementation

3.1 define the DAO interface of MyBatis

3.2 Mapper.xml corresponding to dao interface

Supplement:

5. Conclusion:

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