SpringBoot实战系列-SpringBoot 2.0 基础环境搭建
1. SpringBoot 2.0 是什么？
Spring Boot是由Pivotal团队提供的基于Spring的框架，其设计目的是用来简化新Spring应用的初始搭建以及开发过程。SpringBoot 提供了一些非功能性特性，如嵌入式服务器、安全、健康检查、外部化配置等等。目前SpringBoot最新版本为2.0
2. 获取SpringBoot
使用Maven构建工具获取SpringBoot，在Maven的POM.xml文件中添加以下代码
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.0.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies>
编写启动类
@SpringBootApplication(exclude = {DataSourceAutoConfiguration.class})
@EnableAutoConfiguration
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
编写Controller
@RestController
public class TestController {
@GetMapping(value = "test")
public String test(){
return "test";
}
}
在浏览器中输入http://localhost:8080/test，在浏览器中可以看到test文本
3.集成Mybatis
引入mybatis-spring-boot-starter，以及数据库连接池和MySQL驱动
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.3.2</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.1.8</version>
</dependency>
在resources目录下添加application.properties
server.port=8080
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.driverClassName=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8&serverTimezone=GMT&useSSL=false&autoReconnect=true&failOverReadOnly=false
spring.datasource.username=username
spring.datasource.password=password
spring.datasource.initialSize=5
spring.datasource.minIdle=5
spring.datasource.maxActive=20
spring.datasource.maxWait=60000
spring.datasource.timeBetweenEvictionRunsMillis=60000
spring.datasource.minEvictableIdleTimeMillis=300000
spring.datasource.validationQuery=SELECT 1 FROM DUAL
spring.datasource.testWhileIdle=true
spring.datasource.testOnBorrow=false
spring.datasource.testOnReturn=false
spring.datasource.poolPreparedStatements=true
spring.datasource.maxPoolPreparedStatementPerConnectionSize=20
spring.datasource.filters=stat,wall,log4j
spring.datasource.connectionProperties=druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000
#扫描Mybatis SQL文件
mybatis.mapper-locations=classpath:/mapper/*Mapper.xml
编写Mapper接口和SQL文件
@Mapper
public interface TestMapper {
/**
* 返回数据库版本号
* @return
*/
String version();
}
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="me.smile.practice.mapper.TestMapper" >
<select id="version" resultType="java.lang.String">
select version()
</select>
</mapper>
在test目录下通过编写单元测试检测配置是否正确
@SpringBootTest(classes = App.class)
@RunWith(SpringJUnit4ClassRunner.class)
@WebAppConfiguration
public class TestMapperTest {
@Resource
private TestMapper testMapper;
@Test
public void version() {
String version = testMapper.version();
System.out.println(version);
Assert.assertEquals("5.7.21", version);
}
}
运行单元测试会在控制台输出当前数据库所使用的版本号。
至此基于SpringBoot2.0的基本开发环境搭建完毕。
