ConfigurationProperties不绑定属性
我想通过使用@ConfigurationProperties批注将我的application.properties自动绑定到一个类中。首先,我尝试使用@Value批注,并且能够将属性值注入到类变量中。但是,@
ConfigurationProperties不会将属性注入值。
我的application.properties:
spring.jpa.show-sql=falsemy.url=my_url
my.name=muatik
application.java
package com.muatik;import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ApplicationContext;
@SpringBootApplication
public class Application {
public static void main(String[] args) {
final ApplicationContext ctx = SpringApplication.run(Application.class, args);
final ConfigBinder confs = ctx.getBean(ConfigBinder.class);
System.out.println(confs.getUrl());
System.out.println(confs.getName());
}
}
ConfigBinder.java
package com.muatik;import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;
@Component
@ConfigurationProperties(prefix="my")
public class ConfigBinder {
@Value("${my.name}")
private String name;
private String url; // expected to be filled automatically
public String getUrl() {
return this.url;
}
public String getName() {
return this.name;
}
}
输出:
...2017-01-18 15:19:29.720 INFO 4153 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8080 (http)
2017-01-18 15:19:29.724 INFO 4153 --- [ main] com.muatik.Application : Started Application in 4.212 seconds (JVM running for 4.937)
null
muatik
此实现有什么问题?
:可能的重复:Spring Boot
@ConfigurationProperties无法从环境中检索属性
我发现我错过了ConfigBinder中的设置器。添加它们后,它现在可以使用。
回答:
您需要从属性类中删除@Component并添加setter,因为标准的bean属性绑定被使用@ConfigurationProperties
:
@ConfigurationProperties(prefix="my")public class ConfigBinder {
private String name;
private String url; // expected to be filled automatically
public String getUrl() {
return this.url;
}
public String getName() {
return this.name;
}
public void setName(String name) {
this.name = name;
}
public void setUrl(String url) {
this.url = url;
}
}
并将@EnableConfigurationProperties添加到您的主类中:
@SpringBootApplication@EnableConfigurationProperties(ConfigBinder.class)
public class Application {
public static void main(String[] args) {
final ApplicationContext ctx = SpringApplication.run(Application.class, args);
final ConfigBinder confs = ctx.getBean(ConfigBinder.class);
System.out.println(confs.getUrl());
System.out.println(confs.getName());
}
}
以上是 ConfigurationProperties不绑定属性 的全部内容, 来源链接: utcz.com/qa/431598.html