怎么创建spring boot项目就不说了,下面是pom文件
<?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>4.0.0</modelVersion>
<groupId>com.mybatis</groupId>
<artifactId>mybatistest</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>mybatistest</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.5.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</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>
<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>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid-spring-boot-starter</artifactId>
<version>1.1.9</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
项目结构
controller代码
@Controller
public class UserController {
@Autowired
UserService userService;
@RequestMapping("/find")
@ResponseBody
public List<user> find(){
return userService.find();
}
}
service代码
public interface UserService {
public List<user> find();
}
@Service
public class UserServiceImpl implements UserService{
@Autowired
private UserDao userDao;//此位置会报错,不用管,不影响使用
@Override
public List<user> find() {
return userDao.find();
}
}
dao层代码
@Mapper
public interface UserDao {
@Select("Select * from user")
public List<user> find();
}
pojo代码
public class user {
private Integer id;
private String name;
private String address;
public Integer getId() {
return id;
}
public String getName() {
return name;
}
public String getAddress() {
return address;
}
public void setId(Integer id) {
this.id = id;
}
public void setName(String name) {
this.name = name;
}
public void setAddress(String address) {
this.address = address;
}
}
数据库表结构
application.properties文件
server.port=8080
#指定数据源名(可省略)
##spring.datasource.name=mysql_test
#数据库连接池名称
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
#监控统计拦截的filters
spring.datasource.druid.filters=stat
#基本配置
spring.datasource.druid.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.druid.url=jdbc:mysql://127.0.0.1:3306/mytest?useUnicode=true&characterEncoding=UTF-8&allowMultiQueries=true
spring.datasource.druid.username=root
spring.datasource.druid.password=aaaaaa
#初始化大小
spring.datasource.druid.initial-size=1
#最小
spring.datasource.druid.min-idle=1
#最大
spring.datasource.druid.max-active=20
#获取连接等待的超时时间
spring.datasource.druid.max-wait=600000
#间隔多久进行一次检测,检测需要关闭的链接
spring.datasource.druid.time-between-eviction-runs-millis=60000
#一个链接在池中最小生存时间
spring.datasource.druid.min-evictable-idle-time-millis=3000000
#在这里遇到最大的坑是spring.datasource.druid.driver-class-name=com.mysql.jdbc.Driver,刚开始配置错了,搞了半天才配置对
也可把application.properties文件换成yml文件
server:
port: 8080
spring:
datasource:
name: mysql_test
type: com.alibaba.druid.pool.DruidDataSource
#druid相关配置
druid:
#监控统计拦截的filters
filters: stat
driver-class-name: com.mysql.jdbc.Driver
#基本属性
url: jdbc:mysql://127.0.0.1:3306/mytest?useUnicode=true&characterEncoding=UTF-8&allowMultiQueries=true
username: root
password: aaaaaa
#配置初始化大小/最小/最大
initial-size: 1
min-idle: 1
max-active: 20
#获取连接等待超时时间
max-wait: 60000
#间隔多久进行一次检测,检测需要关闭的空闲连接
time-between-eviction-runs-millis: 60000
#一个连接在池中最小生存的时间
min-evictable-idle-time-millis: 300000
#validation-query: SELECT 'x'
# test-while-idle: true
# test-on-borrow: false
# test-on-return: false
#打开PSCache,并指定每个连接上PSCache的大小。oracle设为true,mysql设为false。分库分表较多推荐设置为false
# pool-prepared-statements: false
# max-pool-prepared-statement-per-connection-size: 20
#mybatis:
#mapper-locations: classpath:mapper/*.xml
#type-aliases-package: com.mybatis.mybatistest.pojo.user