SpringBoot----[16]—SpringBoot集成MyBatis

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SpringBoot----[16]—SpringBoot集成MyBatis

集成Mybatis

新建maven project

 新建一个maven project,取名为：spring-boot-mybatis

在pom.xml文件中引入相关依赖

（1）基本依赖，jdk版本号；
（2）mysql驱动，mybatis依赖包，mysql分页PageHelper:
<!-- mysql 数据库驱动. -->
    <dependency>
		<groupId>mysql</groupId>
		<artifactId>mysql-connector-java</artifactId>
</dependency>
<!-- 	
			spring-boot mybatis依赖：
			
			请不要使用1.0.0版本，因为还不支持拦截器插件，
	    	1.2.0 是博主写帖子时候的版本，大家使用最新版本即可
	     -->
	<dependency>
	    <groupId>org.mybatis.spring.boot</groupId>
	    <artifactId>mybatis-spring-boot-starter</artifactId>
	    <version>1.2.0</version>
	</dependency>
<!-- 
    	MyBatis提供了拦截器接口，我们可以实现自己的拦截器，
    	将其作为一个plugin装入到SqlSessionFactory中。 
		Github上有位开发者写了一个分页插件，我觉得使用起来还可以，挺方便的。 
		Github项目地址： https://github.com/pagehelper/Mybatis-PageHelper
     -->	
    <dependency>
	    <groupId>com.github.pagehelper</groupId>
	    <artifactId>pagehelper</artifactId>
	    <version>4.1.0</version>
	</dependency>	

创建启动类App.java

在application.properties添加配置文件

•	########################################################
•	###datasource
•	########################################################
•	spring.datasource.url = jdbc:mysql://localhost:3306/test
•	spring.datasource.username = root
•	spring.datasource.password = ok
•	spring.datasource.driverClassName = com.mysql.jdbc.Driver
•	spring.datasource.max-active=20
•	spring.datasource.max-idle=8
•	spring.datasource.min-idle=8
•	spring.datasource.initial-size=10

编写Demo测试类

package com.cheny.spring_boot_mybatis;

public class Demo {

	private long id;
	private String name;
	// 省略get和set
}

编写DemoMapper

package com.cheny.spring_boot_mybatis.mapper;


import java.util.List;

import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Options;
import org.apache.ibatis.annotations.Select;
import org.springframework.stereotype.Repository;

import com.cheny.spring_boot_mybatis.Demo;

@Repository
public interface DemoMapper {
	
	//#{name}:参数占位符
	@Select("select * from Demo where name = #{name}")
	List<Demo> likeName(String name);
	
	@Select("select * from Demo where id = #{id}")
	Demo getById(long id);
	
	@Select("select name from Demo where id = #{id}")
	String getNameByID(long id);
	
	@Insert("insert into demo (name) values(#{name})")
	@Options(useGeneratedKeys=true, keyProperty="id", keyColumn="id")
	void save(Demo demo);
}

编写DemoService

package com.cheny.spring_boot_mybatis;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import com.cheny.spring_boot_mybatis.mapper.DemoMapper;

@Service
public class DemoService {
	
	@Autowired
	private DemoMapper demoMapper;
	
	public List<Demo> likeName(String name){
		return demoMapper.likeName(name);
	}

	@Transactional
	void save(Demo demo) {
		demoMapper.save(demo);
	}
}

编写DemoController

package com.cheny.spring_boot_mybatis;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.github.pagehelper.PageHelper;

@RestController
public class DemoController {
	
	@Autowired
	private DemoService demoService;
	
	@RequestMapping("/likeName")
	public List<Demo> likeName(String name){
		// 第一个参数 第几页
		//第二个参数 每页获取的条数
		PageHelper.startPage(1, 2);
		return demoService.likeName(name);
	}
	
	@RequestMapping("/save")
	public Demo save() {
		Demo demo = new Demo();
		demo.setName("张三");
		demoService.save(demo);
		return demo;
	}
}

使用pageHelper分页

package com.cheny.spring_boot_mybatis.config;

import java.util.Properties;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import com.github.pagehelper.PageHelper;
@Configuration
public class MyBatisConfiguration {
	@Bean
    public PageHelper pageHelper() {
		System.out.println("MyBatisConfiguration.pageHelper()");
        PageHelper pageHelper = new PageHelper();
        Properties p = new Properties();
        p.setProperty("offsetAsPageNum", "true");
        p.setProperty("rowBoundsWithCount", "true");
        p.setProperty("reasonable", "true");
        pageHelper.setProperties(p);
        return pageHelper;
    }

}

获取自增长Id