标签:parent mil 配置 pre oid ram reconnect mapping 分类
application.properties中配置
Spring.profiles.active=prd
配置环境:
Application-dev.properties 开发环境
Application-test.properties 测试环境
Application-uat.properties 用户测试环境
Application-prd.properties 生产环境
注意:使用springboot2和mysql8+(8.0.11),jdk8+(jdk8)
配置和之前版本有所不同
项目结构:
从上到下依次创建
public class Employee implements Serializable{ private static final long serialVersionUID = 1L; private Integer id; private String lastName; 省略get/set
2.12.2 controller
@RestController @RequestMapping("/employee") public class EmployeeController { @Resource EmployeeService employeeService; @RequestMapping("/insert") public String insert(String lastName){ Employee emp=new Employee(); emp.setLastName(lastName); int i=employeeService.insert(emp); return i+""; } }
@Service public class EmployeeService { @Resource EmployeeDao employeeDao; public Integer insert(Employee emp) { return employeeDao.insert(emp); } }
省去了接口类写法,直接写service类
public interface EmployeeDao { int insert(Employee emp); }
<?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="com.springboot2.dao.EmployeeDao"> <insert id="insert" parameterType="com.springboot2.bean.Employee"> insert into myemployeee(last_name) values (#{lastName,jdbcType=VARCHAR}) </insert> </mapper>
注意:mapping和dao不在同一个包下,配置时通过
mapper-locations: classpath:com/springboot2/mapping/*.xml
扫描xml文件
2.12.6 application配置文件
mybatis: mapper-locations: classpath:com/springboot2/mapping/*.xml spring: datasource: url: jdbc:mysql://localhost:3306/mytest?useSSL=false&useUnicode=true&characterEncoding=UTF-8&autoReconnect=true&serverTimezone=GMT%2B8&allowMultiQueries=true username: root password: (****) driver-class-name: com.mysql.cj.jdbc.Driver
注意:
1)url连接与之前版本有所不同,如添加serverTimezone时区,useSSL
2)Url中有时报错,可能是&不识别,需要转为&但有时&也会报错,改为&再尝试。本例即改为&不报错。
3)Jdbc驱动变动为com.mysql.cj.jdbc.Driver,之前为com.mysql.jdbc.Driver
https://blog.csdn.net/qq_22076345/article/details/81952035
@SpringBootApplication @MapperScan("com.springboot2.dao") public class StartApplication { public static void main(String[] args) { SpringApplication.run(StartApplication.class, args); } }
<parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.9.RELEASE</version> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!-- mybatis --> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>2.0.1</version> </dependency> <!-- mysql 驱动 --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>8.0.11</version> </dependency> </dependencies>
如果不需要start-web,仅使用mybatis-spring-boot-starter和mysql-connector-java即可。
http://localhost:8080/employee/insert?lastName=test2019
入口成功返回1
1)提示找不到jdbc驱动。清除maven仓库中的mysql-connnector包,重新下载。
2)新版本驱动名称变更:
为com.mysql.cj.jdbc.Driver,之前为com.mysql.jdbc.Driver
springboot事务分类:
1)声明事务
2)编程事务
事务原理:AOP技术环绕通知。
注意点:不能捕捉异常,事务通过异常回滚。
Springboot默认集成事务,只要在方法或类上加上@TransacTional即可,
不需要在启动类上@EnableTransactionManagement
springboot学习入门简易版八---springboot2.0多环境配置、整合mybatis mysql8+(19-20)
标签:parent mil 配置 pre oid ram reconnect mapping 分类
原文地址:https://www.cnblogs.com/cslj2013/p/10852352.html