springboot自定义配置文件

环境依赖

sprint-boot version 2.1.7
java version 1.8

pom.xml 依赖 jar 包

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-configuration-processor</artifactId>
    <optional>true</optional>
</dependency>

test.properties

username=test
password=123456
info.age=26

看下目录布局

TestConfig.java 加载配置的类文件

//prefix 为空则加载整个配置文件中的 参数
@ConfigurationProperties(prefix = "")
@PropertySource("classpath:test.properties")
// 注意一定要注册
@Component
public class TestConfig {
    private String username;
    private String password;
    private Info info;

    public void setInfo(Info info) {this.info = info;}

    public Info getInfo() {return info;}

    public String getUsername() {return username;}

    public String getPassword() {return password;}


    public void setUsername(String username) {this.username = username;}

    public void setPassword(String password) {this.password = password;}

   public static class Info{
       private Integer age;

       public Integer getAge() {return age;}

       public void setAge(Integer age) {this.age = age;}

       @Override
       public String toString() {
           return "Info{" +
                   "age=" + age +
                   '}';
       }
   }

    @Override
    public String toString() {
        return "TestConfig{" +
                "username='" + username + '\'' +
                ", password='" + password + '\'' +
                ", info=" + info +
                '}';
    }
}

HelloController.java 用来测试

@Controller
public class HelloController {

    @Autowired
    TestConfig testConfig;

    @ResponseBody
    @GetMapping("/hello")
    public String sayHello()
    {
        // 读取配置
        return "age=" + testConfig.getInfo().getAge();
    }

    @ResponseBody
    @GetMapping("username")
    public String getUsername()
    {
        // 读取配置测试
        return testConfig.getUsername();}
}

访问 http://localhost:8080/hello | http://localhost:8080/username