SpringBoot
SpringBoot启动
@SpringBootApplication作用
@SpringBootConfiguration（@Configuration）
@EnableAutoConfiguration
Spring Boot 自动配置标记。SpringBoot内置大量的自动配置组件，可以在启动时加载创建对象纳入Spring容器，例如dispatcherServlet、dataSource、jdbcTemplate等等。
@ComponentScan
SpringBoot 扫描标记.等价于<context:component-scan base-package="xx"/>
Properties配置参数注入
可以将application.properties文件中的参数注入给Spring容器中的Bean对象。
server.port=8888
spring.datasource.username=root
spring.datasource.password=123123123
spring.datasource.url=jdbc:mysql://localhost:3306/test
spring.datasource.driverClassName=com.mysql.jdbc.Driver
my.db.url=jdbc.oracle.thin:@asdasdasdasd
@Component @ConfigurationProperties(prefix = "spring.datasource") public class MyBean { private String username; private String password; @Value("${my.db.url}") private String url1;
单独构建Springboot框架：
pom.xml
<parent> <!--设置boot版本 --> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.1.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> <!--springboot Web包 --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!--thymeleaf模板包 --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-thymeleaf</artifactId> </dependency> <dependency> <!--数据库访问基于jdbc --> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-jdbc</artifactId> </dependency> <dependency> <!-- 数据库驱动包 --> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.25</version> </dependency> <!-- mybatis、mybatis-spring、autocofigurer --> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>1.3.0</version> </dependency> </dependencies> <build />
application.properties
server.port=8888
spring.datasource.username=root
spring.datasource.password=666666
spring.datasource.url=jdbc:mysql://localhost:3306/test
spring.datasource.driverClassName=com.mysql.jdbc.Driver
my.db.url=jdbc.oracle.thin\:@asdasdasdasd
启动类
@SpringBootApplication
@MapperScan(basePackages = { "com.xiaoka.dao" }) public class MyBegin { public static void main(String[] args) { //启动Boot程序 SpringApplication.run(MyBegin.class, args); } }
Controller
@RestController public class MyControllerDemo { @Autowired private MySpringbootService mySpringbootService; @RequestMapping("/hello") public ModelAndView dCon() { List<Employee> list = mySpringbootService.getAll(); ModelAndView modelAndView = new ModelAndView(); modelAndView.setViewName("asd"); modelAndView.getModel().put("list", list); return modelAndView; }
Service
@Service public class MySpringbootService { @Autowired private MySpringbootDao mySpringbootDao; public List<Employee> getAll() { List<Employee> list = mySpringbootDao.selectAll(); return list; } }
Dao
public interface MySpringbootDao { @Select("select * from Employee") public List<Employee> selectAll(); }
templates (src/main/resources目录下 templates 文件夹中添加html文件)
<!DOCTYPE html> <html xmlns:th="http://www.thymeleaf.org"> <head> <meta charset="UTF-8"> <title>Insert title here</title> </head> <body> <tr th:each="employee: ${list}"> <td th:text="${employee.name}"></td> <td th:text="${employee.id}"></td> <td th:text="${employee.age}"></td> </tr> </body> </html>
启动MyBootApplication测试
http://localhost:8888/hello
其他功能
-
热启动
修改Java代码后，自动redeploy
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <version>2.0.1.RELEASE</version> </dependency>
