Spring提供了一个

MapPropertySource,您可以在ApplicationContext的环境中注册(您需要一个大多数ApplicationContext实现提供的ConfigurableEnvironment).

解析器(按顺序)使用这些已注册的PropertySource值来查找占位符名称的值.

这是一个完整的例子：

@Configuration

@ComponentScan

public class Example {

@Bean

public static PropertySourcesPlaceholderConfigurer configurer() {

PropertySourcesPlaceholderConfigurer configurer = new PropertySourcesPlaceholderConfigurer();

// can also add it here

//configurer.setPropertySources(propertySources);

return configurer;

}

public static void main(String[] args) {

Map propertyMap = new HashMap<>();

propertyMap.put("key.in.map", "value.in.map");

AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext();

MapPropertySource propertySource = new MapPropertySource("map-source", propertyMap);

ctx.getEnvironment().getPropertySources().addLast(propertySource);

ctx.register(Example.class);

ctx.refresh();

MyClass instance = ctx.getBean(MyClass.class);

System.out.println(instance.getMyValue());

}

}

@Component

class MyClass {

private String myValue;

@Autowired

public MyClass(@Value("${key.in.map}") String myValue) {

this.myValue = myValue;

}

public String getMyValue() {

return myValue;

}

}