<?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.spring</groupId><artifactId>boot</artifactId><version>0.0.1-SNAPSHOT</version><packaging>war</packaging><name>boot</name><description>Demo project for Spring Boot</description><!--sprin boot 父节点依赖，引入这个之后相关的引用就不需要添加version配置了，spring boot会选择最合适的版本进行添加 --><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.0.2.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><!--spring-boot-starter-web : spring相关的jar，内置tomcat服务器，jackson，MVC ，AOP 等 --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></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>

/*** RestController 等价于 @Controller 和 @ResponseBody*/
@RestController //引入spring boot的web模块，就会自动配置web.xml等于web相关的内容
public class HelloController {@RequestMapping("/hello")public String hello(){return "hello";}
}

/*** 指定这是一个spring boot 应用程序*/
@SpringBootApplication
public class BootApplication {public static void main(String[] args) {SpringApplication.run(BootApplication.class,args);}
}

package com.spring.boot;import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.boot.test.web.client.TestRestTemplate;
import org.springframework.boot.web.server.LocalServerPort;
import org.springframework.http.ResponseEntity;
import org.springframework.test.context.junit4.SpringRunner;import java.net.URL;import static org.junit.Assert.assertEquals;@RunWith(SpringRunner.class)
@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
public class BootApplicationTests {@LocalServerPortprivate int port;private URL base;@Autowiredprivate TestRestTemplate template;@Beforepublic void setUp() throws Exception {this.base = new URL("http://localhost:" + port + "/hello");}@Testpublic void hello() throws Exception {ResponseEntity<String> response = template.getForEntity(base.toString(), String.class);assertEquals(response.getBody(), "Hello battcn");}
}

  .   ____          _            __ _ _/\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \\\/  ___)| |_)| | | | | || (_| |  ) ) ) )'  |____| .__|_| |_|_| |_\__, | / / / /=========|_|==============|___/=/_/_/_/:: Spring Boot ::        (v2.0.2.RELEASE)

@SpringBootApplication
public class BootApplication {public static void main(String[] args) {SpringApplication.run(BootApplication.class,args);}
}

@Target({ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Inherited
@SpringBootConfiguration
@EnableAutoConfiguration
@ComponentScan(excludeFilters = {@Filter(type = FilterType.CUSTOM,classes = {TypeExcludeFilter.class}
)}
)
public @interface SpringBootApplication {

@SpringBootConfiguration
public class Config {@Beanpublic String testStr(){return "Hello World";}
}

@RestController //引入spring boot的web模块，就会自动配置web.xml等于web相关的内容
public class HelloController {@AutowiredString testStr;@RequestMapping("/hello")public String hello(){return testStr;}
}