idea+Spring Boot之springboot+mysql+mybatis搭建
springboot的优势之一就是快速搭建项目，省去了自己导入jar包和配置xml的时间，使用非常方便。
1、选择file>new>project创建项目project,然后选择Spring initializr，点击下一步
2、按图示进行勾选，点击下一步，给项目起个名字，点击确定。
3、选择左边的列web，右边列勾选web框
4、如果前面没有修改工程名称，可以在这一界面更改，然后点击finish。
5、项目开始生成，界面右下角回弹出一个小方框，点击Enable Autop-Import ，idea 会自动下载jar包，时间比较长 （5分钟左右）
6、等待片刻后，项目格式如下图。
7、构建pom
xml version="1.0" encoding="UTF-8"?>
<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>4.0.0modelVersion>
<groupId>com.examplegroupId>
<artifactId>demoartifactId>
<version>0.0.1-SNAPSHOTversion>
<packaging>jarpackaging>
<name>demoname>
<description>Demo project for Spring Bootdescription>
<parent>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-parentartifactId>
<version>2.0.3.RELEASEversion>
<relativePath/>
parent>
<properties>
<project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8project.reporting.outputEncoding>
<java.version>1.8java.version>
properties>
<dependencies>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-webartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-testartifactId>
<scope>testscope>
dependency>
<dependency>
<groupId>org.mybatis.spring.bootgroupId>
<artifactId>mybatis-spring-boot-starterartifactId>
<version>1.1.1version>
dependency>
<dependency>
<groupId>mysqlgroupId>
<artifactId>mysql-connector-javaartifactId>
<scope>runtimescope>
dependency>
<dependency>
<groupId>com.alibabagroupId>
<artifactId>druid-spring-boot-starterartifactId>
<version>1.1.0version>
dependency>
dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-maven-pluginartifactId>
plugin>
plugins>
build>
project>
8、创建application.yml文件
server: port: 8080 spring: datasource: name: test driver-class-name: com.mysql.jdbc.Driver url: jdbc:mysql://192.168.3.164:3307/kuangke?useUnicode=true&characterEncoding=utf-8&useSSL=true username: root password: root # 使用druid数据源 type: com.alibaba.druid.pool.DruidDataSource filters: stat maxActive: 20 initialSize: 1 maxWait: 60000 minIdle: 1 timeBetweenEvictionRunsMillis: 60000 minEvictableIdleTimeMillis: 300000 validationQuery: select 'x' testWhileIdle: true testOnBorrow: false testOnReturn: false poolPreparedStatements: true maxOpenPreparedStatements: 20 mybatis: mapper-locations: classpath*:mybatis/mapper/*.xml
9、user实体类
public class User { private String id; private String name; private String sex; private String age ; private String memo; public String getId() { return id; } public void setId(String id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getSex() { return sex; } public void setSex(String sex) { this.sex = sex; } public String getAge() { return age; } public void setAge(String age) { this.age = age; } public String getMemo() { return memo; } public void setMemo(String memo) { this.memo = memo; } }
10 、创建Usermapper 接口
//@Mapper //声明是一个Mapper,与springbootApplication中的@MapperScan二选一写上即可 @Repository public interface UserMapper { ListgetAllUser(); }
11、创建接口 UserService
public interface UserService { ListgetAllUser(); }
12 、创建UserServiceImpl
@Service(value = "userService") public class UserServiceImpl implements UserService { @Resource private UserMapper userMapper; @Override public ListgetAllUser() { return userMapper.getAllUser(); } }
13 、在resource目录下创建mybatis文件下、在该文件下创建mapper文件夹、然后在该文件夹下创建UserMapper.xml
xml version="1.0" encoding="UTF-8"?>
mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="com.yangkai.mapper.UserMapper">
<select id="getAllUser" resultType="com.yangkai.entity.User">
SELECT * FROM user
select>
mapper>
14 、创建controller
@Controller @RequestMapping(value = "/user") public class UserController { @Autowired private UserService userService; @RequestMapping("/getAllUser") @ResponseBody private ListgetAllUser() { List users = userService.getAllUser(); return users; } }
15、最后附上启动器的代码
@SpringBootApplication @EnableTransactionManagement //开启事务管理 @ComponentScan("com.yangkai") @MapperScan("com.yangkai.mapper")//与dao层的@Mapper二选一写上即可(主要作用是扫包) public class DemoApplication { public static void main(String[] args) { SpringApplication.run(DemoApplication.class, args); } @Bean(destroyMethod = "close", initMethod = "init") @ConfigurationProperties(prefix = "spring.datasource") public DataSource druidDataSource() { DruidDataSource druidDataSource = new DruidDataSource(); return druidDataSource; } }
16、项目结构图
17、启动项目在浏览器输入：http://localhost:8080/user/getAllUser ，如下图
源码下载：https://download.csdn.net/download/qq_36245532/10515363