我正在尝试从我的模块中的应用程序属性中读取第二个数据库连接信息。我的配置模块应该读取值。

@Configuration
@PropertySource(value={"classpath:application.properties"})
@ConfigurationProperties(prefix = "spring.second-datasource")
public class DatabaseConfiguration {

    @Value("${url}")
    private String url;
    @Value("${username}")
    private String user;
    @Value("${password}")
    private String password;

    public String getUrl() {
        return url;
    }

    public String getUser() {
        return user;
    }

    public String getPassword() {
        return password;
    }
}

当我在控制器内部调用DatabaseConfiguration时，它会给出一个错误。

private DatabaseConfiguration databaseConfiguration;
databaseConfiguration.getUrl();
.
.
.

Caused by: java.lang.IllegalArgumentException: Could not resolve placeholder 'url' in value "${url}"

我找到了一些解决方案，比如这个

Spring boot无法解析字符串中的占位符

我实现了它。

http://maven.apache.org/xsd/maven-4.0.0.xsd"

<artifactId>//artifactID</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<name>fraud-core</name>
<description>Demo project for Spring Boot</description>

<parent>
   //Parent
</parent>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <java.version>1.8</java.version>
    <HMN_CDM_Facade.version>TEST-SNAPSHOT</HMN_CDM_Facade.version>
    <hmn.dependency.scope>compile</hmn.dependency.scope>
</properties>

<dependencies>
    //DEPENDENCIES
</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>

    <resources>
        <resource>
            <directory>src/main/resources</directory>
            <filtering>true</filtering>
            <includes>
                <include>**/*.properties</include>
            </includes>
        </resource>
    </resources>
</build>

谢谢