App.java
package com.kfit.spring_boot_mybatis; import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication; /**
* Spring Boot启动类.
*/
@SpringBootApplication
@MapperScan("com.kfit.*")//扫描：该包下相应的class,主要是MyBatis的持久化类.
public class App {
public static void main(String[] args) {
SpringApplication.run(App.class, args);
}
}
Demo.java
package com.kfit.spring_boot_mybatis;
//这里先要建表demo
public class Demo {
private long id;
private String name;
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
} }
DemoController.java
package com.kfit.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);//请求进行拦截,只返回前2条数据
return demoService.likeName(name);
} @RequestMapping("/save")
public Demo save(){
Demo demo = new Demo();
demo.setName("张三55");
demoService.save(demo);
return demo;
} }
DemoMappper.java
package com.kfit.spring_boot_mybatis; import java.util.List; import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Options;
import org.apache.ibatis.annotations.Select; public interface DemoMappper { //#{name}:参数占位符
@Select("select *from Demo where name=#{name}")
public List<Demo> likeName(String name); @Select("select *from Demo where id = #{id}")
public Demo getById(long id); @Select("select name from Demo where id = #{id}")
public String getNameById(long id); /**
* 保存数据.
*/
@Insert("insert into Demo(name) values(#{name})")
@Options(useGeneratedKeys=true,keyProperty="id",keyColumn="id")
//是否开启自增涨主键key,属性名字和对应的数据库的名字
public void save(Demo demo); }
DemoService.java
package com.kfit.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; @Service
public class DemoService { @Autowired
private DemoMappper demoMappper; public List<Demo> likeName(String name){
return demoMappper.likeName(name);
} @Transactional//添加事务.
public void save(Demo demo){
demoMappper.save(demo);
} }
MyBatisConfiguration.java
package com.kfit.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;
}
}
总结.txt
Spring Boot 集成Mybatis:
---------------------------------------
1、新建一个新的Maven Project;
2、需要在pom.xml文件添加相应的依赖，
比如：mysql驱动；
PageHelper分页插件，需要版本号；
3、编写启动类，大部分和之前的代码是一样的，需要的注意的是：
需要添加一个注解@MapperScan --指定MyBatis持久类的位置；
4、编写一个测试的实体类Demo;
5、编写一个DemoMapper,使用@Select和@Save进行数据库操作；
使用@Options配置返回的主键信息；
6、编写DemoService;
7、编写DemoController;
8、添加分页配置信息，需要添加一个MyBatisConfiguration;
9、使用PageHelper.startPage(pageNum,pageSize)进行分页；
application.properties
spring.datasource.url = jdbc:mysql://localhost:3306/spboot1
spring.datasource.username = root
spring.datasource.password =
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
pom.xml
<!-- 添加依赖 --> <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.kfit</groupId>
<artifactId>spring-boot-mybatis</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging> <name>spring-boot-mybatis</name>
<url>http://maven.apache.org</url> <!-- spring boot parent节点，引入这个之后，在下面和spring boot相关的就不需要引入版本了; -->
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.4.1.RELEASE</version>
</parent> <properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<!-- 指定一下jdk的版本 ，这里我们使用jdk 1.8 ,默认是1.6 -->
<java.version>1.8</java.version>
</properties> <dependencies> <!-- web支持: 1、web mvc; 2、restful; 3、jackjson支持; 4、aop ........ -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency> <!-- 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， 1.1.1 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>1.1.1</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> </dependencies> <build>
<defaultGoal>compile</defaultGoal>
</build>
</project>