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springboot(6)从springboot配置文件获取值

 2 years ago
source link: https://wakzz.cn/2018/01/22/springboot/(6)%E4%BB%8Espringboot%E9%85%8D%E7%BD%AE%E6%96%87%E4%BB%B6%E8%8E%B7%E5%8F%96%E5%80%BC/
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springboot(6)从springboot配置文件获取值

祈雨的博客
2018-01-22

1、配置文件

在application.properties中添加测试数据

my.name = wxtx
my.age = 20
#my.desc的实际值为hello wxtx
my.desc = hello ${my.name}
my.host[0] = 127.0.0.1
my.host[1] = 127.0.0.2
my.host[2] = 127.0.0.3

2、获取值

@Autowired
private Environment envir;

@Value("${my.desc}")
private String desc;

@Value("${my.age}")
private Integer age;

// 不存在的值设置null
@Value("${my.history:#{null}}")
private String history;

public void testProperty() throws Exception {
	//通过Environment获取值
	System.out.println(envir.getProperty("my.name"));
	//直接获取指定值
	System.out.println(age);
	System.out.println(desc);
	//输出null
	System.out.println(history);
}

3、依赖注入值

@Component
@ConfigurationProperties("my")
public class TestProperties {

// 自动将my.host[0]、my.host[1]、my.host[2]组装成list对象注入
	private List<String> host;
	public List<String> getHost() {
		return host;
	}
	public void setHost(List<String> host) {
		this.host = host;
	}

}

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