Spring @ConfigurationProperties 不映射对象列表 [英] Spring @ConfigurationProperties not mapping list of objects

问题描述

我在使用 spring 属性映射器时遇到了奇怪的问题.我有 yml 包含值列表.我想将其转换为为什么要构建应用程序的对象列表.所以，我使用了@ConfigurationProperties.有了这个，我就可以映射简单的类型.当我使用它来复杂类型(对象列表)时，它失败了.也不例外，但是当我调试时，值列表为零.请在下面找到 yml 和 java 文件.我试过 spring 2.0.0,2.0.1,2.0.2,2.0.3 没有成功.任何人都可以有办法修复它吗?

I am facing strange issue with spring property mapper. I have yml contains list of values. I want convert that to list of object why building application. So, i used @ConfigurationProperties. With this i am able to map simple types. when i use this to complex type(list of objects) it failed. No exception, but values list is zero when i debug. please find below yml and java files. I tried with spring 2.0.0,2.0.1,2.0.2,2.0.3 No success. Can any one have idea to fix it?

应用程序.yml

acme:
  list:
    - name: my name
      description: my description
    - name: another name
      description: another description

AcmeProperties.java

AcmeProperties.java

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.PropertySource;
import org.springframework.stereotype.Component;

import java.util.ArrayList;
import java.util.List;

@Component
@ConfigurationProperties("acme")
@PropertySource("classpath:configuration/yml/application.yml")
public class AcmeProperties {

    private final List<MyPojo> list = new ArrayList<>();

    public List<MyPojo> getList() {
        return this.list;
    }

    static class MyPojo {
        private String name;
        private String description;

        public String getName() {
            return name;
        }

        public String getDescription() {
            return description;
        }
    }
}

使用 setter 和 getter 方法:

With setter and getter methods:

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.PropertySource;
import org.springframework.stereotype.Component;

import java.util.List;

@Component
@ConfigurationProperties(prefix = "acme")
@PropertySource("classpath:configuration/yml/application.yml")
public class AcmeProperties {

    private List<MyPojo> list;

    public List<MyPojo> getList() {
        return list;
    }

    public void setList(List<MyPojo> list) {
        this.list = list;
    }

    public static class MyPojo {
        private String name;
        private String description;

        public String getName() {
            return name;
        }

        public void setName(String name) {
            this.name = name;
        }

        public String getDescription() {
            return description;
        }

        public void setDescription(String description) {
            this.description = description;
        }
    }
}

这个类的用法:

@Autowired
public HomeController(AppProperties appProperties, AcmeProperties acmeProperties) {
    this.appProperties = appProperties;
    this.acmeProperties = acmeProperties;
}

推荐答案

问题是PropertySource 只支持属性文件，无法从yml 文件中读取值.你可以像这样更新它:

The problem is PropertySource only support the properties file, you cannot read the value from yml file. you can update it like:

@Component
@ConfigurationProperties("acme")
@PropertySource("classpath:/configuration/yml/test.properties")
class AcmeProperties {

configuration/yml/test.properties

acme.list[0].name=my name
acme.list[0].description=my description
acme.list[1].name=another name
acme.list[1].description=another description

代码应该可以工作.

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