Spring Boot 主要特征是：
创建独立的spring应用程序
直接内嵌tomcat，jetty,underow(不需要打成war包部署)
提供了固定化的"starter"配置,以简化构建配置
尽可能的配置spring和第三方库
提供产品级的功能，如安全指标，运行状况检测，和外部配置等
绝不会生成代码，并且不需要xml配置
Spring Boot为所有 Spring 的开发者提供一个开箱即用的、非常快速的、广泛接受的入门体验
pom配置
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.8.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.tea</groupId>
<artifactId>tea</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>tea</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!-- Druid连接池 -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid-spring-boot-starter</artifactId>
<version>1.1.14</version>
</dependency>
<!--不要忘记数据库驱动，因为springboot不知道我们使用的什么数据库，这里选择mysql-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<!--mybatis -->
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.1.0</version>
</dependency>
<!-- 通用mapper -->
<dependency>
<groupId>tk.mybatis</groupId>
<artifactId>mapper-spring-boot-starter</artifactId>
<version>2.0.2</version>
</dependency>
<!--thymeleaf模板-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
@SpringBootApplication
为一个组合注解,包含了
-
@SpringBootConfiguration
-
@EnableAutoConfiguration //开启自动配置
-
@ComponentScan //开启注解扫描
-
@Configuration：声明JdbcConfiguration是一个配置类。
-
@PropertySource：指定属性文件的路径是:classpath:jdbc.properties
-
通过@Value为属性注入值。
-
通过@Bean将 dataSource()方法声明为一个注册Bean的方法，Spring会自动调用该方法，将方法的返回值加入Spring容器中。相当于以前的bean标签
@Table(name = "tb_user")
public class User {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
private String userName;
private String password;
private String name;
private Integer age;
private Integer sex;
private Date birthday;
private Date created;
private Date updated;
getter setter method
}
//通用mapper
@Mapper
public interface UserMapper extends tk.mybatis.mapper.common.Mapper<User>{
}
@Service
public class UserService {
@Autowired
private UserMapper userMapper;
public User queryById(Long id){
return this.userMapper.selectByPrimaryKey(id);
}
@Transactional
public void deleteById(Long id){
this.userMapper.selectByPrimaryKey(id);
}
public List<User> all(){
return this.userMapper.selectAll();
}
}
@Controller
@RequestMapping("/user")
public class UserController {
@Autowired
private UserService userService;
@GetMapping("{id}")
@ResponseBody
public User queryUserId(@PathVariable("id") Long id){
return this.userService.queryById(id);
}
@GetMapping("/all")
public String all(Model model){
List<User> users = this.userService.all();
model.addAttribute("users",users);
return "user";
}
}
