Springboot入门（二）项目配置

pom.xml文件相关信息

    <!-- 项目的相关信息-->    <groupId>com.example</groupId>    <artifactId>Test</artifactId>    <version>0.0.1-SNAPSHOT</version>    <packaging>jar</packaging>    <name>Test</name>    <description>Demo project for Spring Boot</description>    <!--SpringBoot的parent配置  -->    <parent>        <groupId>org.springframework.boot</groupId>        <artifactId>spring-boot-starter-parent</artifactId>        <version>1.5.6.RELEASE</version>        <relativePath/> <!-- lookup parent from repository -->    </parent>        <!--Springboot web配置  -->        <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter-web</artifactId>        </dependency>        <!--Springboot的单元测试  -->        <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter-test</artifactId>            <scope>test</scope>        </dependency>    <!--SpringBoot 构建项目时使用的插件配置  -->    <build>        <plugins>            <plugin>                <groupId>org.springframework.boot</groupId>                <artifactId>spring-boot-maven-plugin</artifactId>            </plugin>        </plugins>    </build>

TestApplication.java

//要启动springboot项目必须添加该注解@SpringBootApplicationpublic class TestApplication {    public static void main(String[] args) {    //springboot的启动        SpringApplication.run(TestApplication.class, args);    }}

HelloWorld.java

1、在类上面条件声明@RestController
2、增加方法@RequestMapping(“/hello”）

@RestControllerpublic class HelloWorld {    @RequestMapping(value="/hello",method=RequestMethod.GET)    public String say() {        return "Hello Springboot";    }}

application.properties

server.port=8081server.context-path=/Test

server.context-path=/Test为浏览网址添加了一个路径
访问地址：http://127.0.0.1:8081/Test/hello

这里推荐使用application.yml文件，application.yml文件写法上更加简单。

server:  port: 8082  context-path: /Test  

1、注意port：跟8082之间有空格，context-path也是一样有空格。
2、使用yml文件必须进行配置

        <!-- 支持 @ConfigurationProperties 注解 --><!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-configuration-processor --><dependency>      <groupId>org.springframework.boot</groupId>      <artifactId>spring-boot-configuration-processor</artifactId>  </dependency>

例如：

@RestControllerpublic class HelloController {    @Value("${age}")    private Integer age ;    @RequestMapping(value="/helloctrl", method=RequestMethod.GET)    public String say() {        return age+"";    }}

application.yml

server:  port: 8081age: 18

Demo

HelloController.java

@RestControllerpublic class HelloController {    @Value("${age}")    private Integer age ;    @Value("${name}")    private String name;    @Value("${content}")    private String content;    @RequestMapping(value="/helloctrl", method=RequestMethod.GET)    public String say() {        return content;    }}

application.yml

server:  port: 8081age: 18name: 小芳content: "name:${name} age:${age} "

简化书写方式：

PersonProperties.java

//添加组件@Component//设置前缀是person@ConfigurationProperties(prefix="person")public class PersonProperties {    private String name;    private Integer age;    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public Integer getAge() {        return age;    }    public void setAge(Integer age) {        this.age = age;    }}

application.yml

server:  port: 8081person:  age: 19  name: 小芳

调用

@RestControllerpublic class HelloController {    @Autowired    private PersonProperties mPersonProperties;    @RequestMapping(value="/helloctrl", method=RequestMethod.GET)    public String say() {        return "name:"+mPersonProperties.getName()+"age:"+mPersonProperties.getAge();    }}

结果图省略

开发环境与测试环境配置