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=false

my.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

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