解决SpringBoot使用yaml作为配置文件遇到的坑

目录

• SpringBoot yaml作为配置文件遇到的坑
  • 背景
  • 感觉修改一下比较好，类似这样：
• SpringBoot-yaml配置注入
  • yaml基础语法
    • 字面量：普通的值 [ 数字，布尔值，字符串 ]
    • 对象、Map（键值对）
    • 数组（ List、set ）
    • 修改SpringBoot的默认端口号
  • yaml注入配置文件
    • 原来的方法
    • Yaml方法
    • @PropertySource的使用
    • @configurationProperties的使用
    • 结论

Skipped (empty) config file "file:/E:/workspace/union-service/union-service-dao/target/test-classes/application.yml" (classpath:/application.yml)

public PropertySource<?> load(Resource resource, String group, String name,
  String profile) throws IOException {
if (isFile(resource)) {
  String sourceName = generatePropertySourceName(name, profile);
  for (PropertySourceLoader loader : this.loaders) {
  if (canLoadFileExtension(loader, resource)) {
    PropertySource<?> specific = loader.load(sourceName, resource,
      profile);
    addPropertySource(group, specific, profile);
    return specific;
  }
  }
}
return null;
}

@Override
public PropertySource<?> load(String name, Resource resource, String profile)
  throws IOException {
if (ClassUtils.isPresent("org.yaml.snakeyaml.Yaml", null)) {
  Processor processor = new Processor(resource, profile);
  Map<String, Object> source = processor.process();
  if (!source.isEmpty()) {
  return new MapPropertySource(name, source);
  }
}
return null;
}

@Override
public PropertySource<?> load(String name, Resource resource, String profile)
  throws IOException {
if (ClassUtils.isPresent("org.yaml.snakeyaml.Yaml", null)) {
  Processor processor = new Processor(resource, profile);
  Map<String, Object> source = processor.process();
  if (!source.isEmpty()) {
  return new MapPropertySource(name, source);
  }
} else {
  logger.warn("Found " + name + " while lacking of snakeyaml");
}
return null;
}

yaml name: "kuang 
 shen"

yaml name: ‘kuang 
 shen"

#对象、Map格式k:     v1:    v2:

student:    name: qinjiang    age: 3

student: {name: qinjiang,age: 3}

pets: - cat - dog - pig

pets: [cat,dog,pig]

server:  port: 8082

package com.kuang.springboot.pojo;
@Component  //注册bean到容器中
public class Dog {
    private String name;
    private Integer age;
    
    //有参无参构造、get、set方法、toString()方法  
}

@Component //注册bean
public class Dog {
    @Value("阿黄")
    private String name;
    @Value("18")
    private Integer age;
}

@SpringBootTest
class DemoApplicationTests {
    @Autowired //将狗狗自动注入进来
    Dog dog;
    @Test
    public void contextLoads() {
        System.out.println(dog); //打印看下狗狗对象
    }
}

@Component //注册bean到容器中
public class Person {
    private String name;
    private Integer age;
    private Boolean happy;
    private Date birth;
    private Map<String,Object> maps;
    private List<Object> lists;
    private Dog dog;
    
    //有参无参构造、get、set方法、toString()方法  
}

person:
  name: qinjiang
  age: 3
  happy: false
  birth: 2000/01/01
  maps: {k1: v1,k2: v2}
  lists:
   - code
   - girl
   - music
  dog:
    name: 旺财
    age: 1

/*
@ConfigurationProperties作用：
将配置文件中配置的每一个属性的值，映射到这个组件中；
告诉SpringBoot将本类中的所有属性和配置文件中相关的配置进行绑定
参数 prefix = “person” : 将配置文件中的person下面的所有属性一一对应
*/
@Component //注册bean
@ConfigurationProperties(prefix = "person")
public class Person {
    private String name;
    private Integer age;
    private Boolean happy;
    private Date birth;
    private Map<String,Object> maps;
    private List<Object> lists;
    private Dog dog;
}

@SpringBootTest
class DemoApplicationTests {
    @Autowired
    Person person; //将person自动注入进来
    @Test
    public void contextLoads() {
        System.out.println(person); //打印person信息
    }
}

name=kuangshen

@PropertySource(value = "classpath:person.properties")
@Component //注册bean
public class Person {
    @Value("${name}")
    private String name;
    ......  
}