Java Spring Boot 无法识别 application.properties 文件

Spring Boot not recognizing application.properties file

提问by Yu Chen

I'm trying to configure a DynamoDb client with Spring Boot, and placed my endpoints and configuration information in my resources/application.properties file. However, Spring Boot does not seem to pick up these properties. It does pick up the "server.default" key that I have stored in the same file, so it is definitely recognizing the the file itself.

我正在尝试使用 Spring Boot 配置 DynamoDb 客户端，并将我的端点和配置信息放在我的 resources/application.properties 文件中。但是，Spring Boot 似乎并没有选择这些属性。它确实选择了我存储在同一个文件中的“server.default”键，因此它肯定会识别文件本身。

Here is my application.properties file and the class I'm trying to load properties into (DynamoDBClientMapper):

这是我的 application.properties 文件和我试图将属性加载到（DynamoDBClientMapper）中的类：

amazon.dynamodb.endpoint=http://localhost:8000/
amazon.dynamodb.region=us-west-1
amazon.aws.accesskey=key
amazon.aws.secretkey=key2

server.port=8080

Here is my project structure:

这是我的项目结构：

Here is the relevant class I'm trying to load properties into. I tried the @PropertySourceannotation with a new properties file, as well as EnableAutoConfiguration, but neither are registering the properties file(s).

这是我尝试将属性加载到的相关类。我尝试了带有新属性文件的@PropertySource注释以及EnableAutoConfiguration，但都没有注册属性文件。

@PropertySource("database.properties")
public class DynamoClientMapper {

    @Value("${amazon.dynamodb.endpoint}")
    private String amazonDynamoDBEndpoint;

    @Value("${amazon.aws.accesskey}")
    private String amazonAWSAccessKey;

    @Value("${amazon.aws.secretkey}")
    private String amazonAWSSecretKey;

    @Value("${amazon.aws.region}")
    private String amazonAWSRegion;

Here is my App.java:

这是我的 App.java：

@SpringBootApplication
@EnableAutoConfiguration(exclude = {DataSourceAutoConfiguration.class})
public class App {

//    private static final Logger logger = Logger.getLogger(App.class.toString());

    public static void main(String[] args){
        SpringApplication.run(App.class, args);
    }
}

Here is the stack trace:

这是堆栈跟踪：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dynamoClientMapper' defined in file [C:\Users\ychen4\Desktop\DiningApplication\target\classes\main\java\com\dining\dao\DynamoClientMapper.class]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [main.java.com.dining.dao.DynamoClientMapper$$EnhancerBySpringCGLIB$$f4ba10ad]: Constructor threw exception; nested exception is java.lang.IllegalArgumentException: endpoint cannot be null
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1155) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1099) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:513) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:761) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:866) ~[spring-context-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:542) ~[spring-context-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) ~[spring-boot-1.5.2.RELEASE.jar:1.5.2.RELEASE]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:737) [spring-boot-1.5.2.RELEASE.jar:1.5.2.RELEASE]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:370) [spring-boot-1.5.2.RELEASE.jar:1.5.2.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:314) [spring-boot-1.5.2.RELEASE.jar:1.5.2.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1162) [spring-boot-1.5.2.RELEASE.jar:1.5.2.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1151) [spring-boot-1.5.2.RELEASE.jar:1.5.2.RELEASE]
    at main.java.com.dining.App.main(App.java:18) [classes/:na]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_121]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_121]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_121]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_121]
    at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) [spring-boot-devtools-1.5.2.RELEASE.jar:1.5.2.RELEASE]
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [main.java.com.dining.dao.DynamoClientMapper$$EnhancerBySpringCGLIB$$f4ba10ad]: Constructor threw exception; nested exception is java.lang.IllegalArgumentException: endpoint cannot be null
    at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:154) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:89) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1147) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    ... 22 common frames omitted
Caused by: java.lang.IllegalArgumentException: endpoint cannot be null
    at com.amazonaws.util.RuntimeHttpUtils.toUri(RuntimeHttpUtils.java:182) ~[aws-java-sdk-core-1.11.125.jar:na]
    at com.amazonaws.util.RuntimeHttpUtils.toUri(RuntimeHttpUtils.java:171) ~[aws-java-sdk-core-1.11.125.jar:na]
    at com.amazonaws.AmazonWebServiceClient.toURI(AmazonWebServiceClient.java:238) ~[aws-java-sdk-core-1.11.125.jar:na]
    at com.amazonaws.AmazonWebServiceClient.setEndpoint(AmazonWebServiceClient.java:228) ~[aws-java-sdk-core-1.11.125.jar:na]
    at com.amazonaws.client.builder.AwsClientBuilder.setRegion(AwsClientBuilder.java:362) ~[aws-java-sdk-core-1.11.125.jar:na]
    at com.amazonaws.client.builder.AwsClientBuilder.configureMutableProperties(AwsClientBuilder.java:337) ~[aws-java-sdk-core-1.11.125.jar:na]
    at com.amazonaws.client.builder.AwsSyncClientBuilder.build(AwsSyncClientBuilder.java:46) ~[aws-java-sdk-core-1.11.125.jar:na]
    at main.java.com.dining.dao.DynamoClientMapper.<init>(DynamoClientMapper.java:32) ~[classes/:na]
    at main.java.com.dining.dao.DynamoClientMapper$$EnhancerBySpringCGLIB$$f4ba10ad.<init>(<generated>) ~[classes/:na]
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_121]
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_121]
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_121]
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[na:1.8.0_121]
    at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:142) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    ... 24 common frames omitted

I've tried making another separate database.properties file , but Spring Boot isn't recognizing that either. What am I doing wrong?

我尝试制作另一个单独的 database.properties 文件，但 Spring Boot 也无法识别。我究竟做错了什么？

采纳答案by SkyWalker

You can make a try to define resources tag in the build section in your pom.xml file. Set path for resource directory where is application.properties

您可以尝试在 pom.xml 文件的构建部分中定义资源标签。设置资源目录的路径在哪里application.properties

<build>
        <resources>
            <resource>
                <directory>resources</directory>
                <targetPath>${project.build.outputDirectory}</targetPath>
                <includes>
                    <include>application.properties</include>
                </includes>
            </resource>
        </resources>
</build>

Resource Link: https://stackoverflow.com/a/30595114/2293534

资源链接：https: //stackoverflow.com/a/30595114/2293534

Another approach:

另一种方法：

If you use spring 3.X version, You can add @PropertySource("application.properties")

如果您使用 spring 3.X 版本，您可以添加 @PropertySource("application.properties")

@Configuration
@PropertySource(value = "classpath:application.properties")
public class ApplicationConfig {

    // more configuration ...
}

If you use spring 4 version, you add 2 properties file using new annotation called @PropertySources that allows you to declare repeated @PropertySource annotations:

如果您使用 spring 4 版本，则使用名为 @PropertySources 的新注释添加 2 个属性文件，该注释允许您声明重复的 @PropertySource 注释：

@PropertySources({
    @PropertySource("default.properties"),
    @PropertySource("overriding.properties")
})

Details is given here in my another answer: https://stackoverflow.com/a/43659158/2293534

在我的另一个答案中给出了详细信息：https: //stackoverflow.com/a/43659158/2293534

UPDATE#1:

更新#1：

Replace your App.java class with following class

用下面的类替换你的 App.java 类

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.context.web.SpringBootServletInitializer;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;

//@SpringBootApplication
@Configuration
@ComponentScan
@EnableAutoConfiguration
public class Application extends SpringBootServletInitializer {

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }


    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
        return application.sources(applicationClass);
    }

    private static Class<Application> applicationClass = Application.class;
}

For java.io.FileNotFoundException:

对于 java.io.FileNotFoundException：

Use the following

使用以下

@PropertySource(value = "database.properties", ignoreResourceNotFound = true)

UPDATE#2:

更新#2：

I have followed the following steps to run your application. It runs successfully.

我已按照以下步骤运行您的应用程序。它运行成功。

1. Go to your project folder where pom.xml is exists.

2. You have some errors and warning on pom.xml. I have clarified all.

3. Open command prompt and Run mvn clean

4. Run mvn clean install

5. At last mvn spring-boot:run

1. 转到存在 pom.xml 的项目文件夹。

2. 您在 pom.xml 上有一些错误和警告。我都澄清了。

3. 打开命令提示符并运行 mvn clean

4. 跑 mvn clean install

5. 最后 mvn spring-boot:run

Then in browser, I run "http://localhost:8080/"

然后在浏览器中，我运行“ http://localhost:8080/”

It open's the project successfully. I have also searched other pages also opened successfully.

它成功打开了项目。我还搜索了其他页面也成功打开。

First page looks like below http://localhost:8080/

第一页如下所示 http://localhost:8080/

Review all pages looks like below: http://localhost:8080/api/reviews

查看所有页面如下所示： http://localhost:8080/api/reviews

[{"id":1,"userName":"ychennay","reviewText":"This restaurant was terrific!"},{"id":2,"userName":"david","reviewText":"This restaurant was okay!"},{"id":3,"userName":"ben","reviewText":"This restaurant was mediocre!"},{"id":4,"userName":"leon","reviewText":"This restaurant was awful!"},{"id":5,"userName":"lawrence","reviewText":"This restaurant was confusing!"}]

[{"id":1,"userName":"ychennay","re​​viewText":"这家餐厅太棒了！"},{"id":2,"userName":"david","re​​viewText":"这个餐厅还行！"},{"id":3,"userName":"ben","re​​viewText":"这家餐厅很一般！"},{"id":4,"userName":"leon", "reviewText":"这家餐厅太糟糕了！"},{"id":5,"userName":"lawrence","re​​viewText":"这家餐厅令人困惑！"}]

So Replace your pom.xml

所以替换你的 pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.diningapp</groupId>
    <artifactId>Dining</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>war</packaging>
    <properties>
        <Hymanson.version>2.7.5</Hymanson.version>
        <spring-version>4.3.7.RELEASE</spring-version>
        <dynamodb-local.port>8000</dynamodb-local.port>
        <dynamodb-local.endpoint>http://localhost:${dynamodb-local.port}</dynamodb-local.endpoint>
        <spring-boot-version>1.5.2.RELEASE</spring-boot-version>
        <aws-sdk-java-version>1.11.124</aws-sdk-java-version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <!-- For UTF-8 support -->
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <!-- For UTF-8 support -->
    </properties>


    <build>
        <sourceDirectory>src</sourceDirectory>
        <plugins>
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.5.1</version>
                <configuration>
                    <source>1.7</source> <!-- Used java7 -->
                    <target>1.7</target> <!-- Used java7 -->
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <version>${spring-boot-version}</version>
                <executions>
                    <execution>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <artifactId>maven-war-plugin</artifactId>
                <version>3.0.0</version>
                <configuration>
                    <warSourceDirectory>WebContent</warSourceDirectory>
                </configuration>
            </plugin>
        </plugins>
    </build>

    <repositories>
        <repository>
            <id>dynamodb-local-oregon</id>
            <name>DynamoDB Local Release Repository</name>
            <url>https://s3-us-west-2.amazonaws.com/dynamodb-local/release</url>
        </repository>
    </repositories>







    <dependencies>
        <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-releasetrain</artifactId>
            <version>Hopper-SR10</version>
            <type>pom</type>
            <!-- <scope>import</scope> -->
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <version>${spring-boot-version}</version> <!-- You have missed to add this version -->
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-configuration-processor</artifactId>
            <version>${spring-boot-version}</version> <!-- You have missed to add this version -->
            <optional>true</optional>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <version>${spring-boot-version}</version>
        </dependency>
        <dependency>
            <groupId>com.amazonaws</groupId>
            <artifactId>aws-java-sdk-dynamodb</artifactId>
            <version>${aws-sdk-java-version}</version>
        </dependency>
        <dependency>
            <groupId>com.github.derjust</groupId>
            <artifactId>spring-data-dynamodb</artifactId>
            <version>4.3.1</version>
        </dependency>

        <dependency>
            <groupId>com.amazonaws</groupId>
            <artifactId>aws-java-sdk-bom</artifactId>
            <version>${aws-sdk-java-version}</version>
            <type>pom</type>
            <!-- <scope>import</scope> -->
            <scope>provided</scope> <!-- changed import to provided -->
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</artifactId>
            <version>${spring-boot-version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring-version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>${spring-version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>${spring-version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring-version}</version>
        </dependency>
        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>${spring-version}</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.Hymanson.core</groupId>
            <artifactId>Hymanson-databind</artifactId>
            <version>${Hymanson.version}</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.38</version> <!-- You have missed to add this version -->
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-security -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
            <version>${spring-boot-version}</version>
        </dependency>

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.0.1</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.16.10</version>
            <scope>provided</scope>
        </dependency>
    </dependencies>
</project>

Errors and solutions:

错误及解决方法：

Issue#1:

问题#1：

[WARNING] 'dependencies.dependency.scope' for org.springframework.data:spring-data-releasetrain:pom must be one of [provided, compile, runtime, test, system] but is 'import'. @ line 70, column 18

[警告] org.springframework.data:spring-data-releasetrain:pom 的“dependencies.dependency.scope”必须是 [provided, compile, runtime, test, system] 之一，但是是“import”。@ 第 70 行，第 18 列

Solution#1:

解决方案#1：

<dependency>
    <groupId>org.springframework.data</groupId>
    <artifactId>spring-data-releasetrain</artifactId>
    <version>Hopper-SR10</version>
    <type>pom</type>
    <!-- <scope>import</scope> -->
    <scope>provided</scope>  <!-- changed import to provided -->
</dependency>

---

---

Issue#2:

问题#2：

[ERROR] 'dependencies.dependency.version' for org.springframework.boot:spring-boot-devtools:jar is missing. @ line 73, column 19

[错误] 缺少 org.springframework.boot:spring-boot-devtools:jar 的“dependencies.dependency.version”。@ 第 73 行，第 19 列

Solution#2:

解决方案#2：

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-devtools</artifactId>
    <version>${spring-boot-version}</version> <!-- You have missed to add this version -->
    <optional>true</optional>
</dependency>

---

---

Issue#3:

问题#3：

[ERROR] 'dependencies.dependency.version' for org.springframework.boot:spring-boot-configuration-processor:jar is missing. @ line 78, column 19

[错误] org.springframework.boot:spring-boot-configuration-processor:jar 的“dependencies.dependency.version”丢失。@ 第 78 行，第 19 列

Solution#3:

解决方案#3：

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-configuration-processor</artifactId>
    <version>${spring-boot-version}</version> <!-- You have missed to add this version -->
    <optional>true</optional>
</dependency>

---

---

Issue#4:

问题#4：

[WARNING] 'dependencies.dependency.scope' for com.amazonaws:aws-java-sdk-bom:pom must be one of [provided, compile, runtime, test, system] but is 'import'. @ line 105, column 18

[警告] com.amazonaws:aws-java-sdk-bom:pom 的“dependencies.dependency.scope”必须是 [provided, compile, runtime, test, system] 之一，但是是“import”。@ 第 105 行，第 18 列

Solution#4:

解决方案#4：

<dependency>
    <groupId>com.amazonaws</groupId>
    <artifactId>aws-java-sdk-bom</artifactId>
    <version>${aws-sdk-java-version}</version>
    <type>pom</type>
    <!-- <scope>import</scope> -->
    <scope>provided</scope> <!-- changed import to provided -->
</dependency>

---

---

Issue#5:

问题#5：

[ERROR] 'dependencies.dependency.version' for mysql:mysql-connector-java:jar is missing. @ line 148, column 19

[错误] mysql:mysql-connector-java:jar 的“dependencies.dependency.version”丢失。@ 第 148 行，第 19 列

Solution#5:

解决方案#5：

<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>5.1.38</version> <!-- You have missed to add this version -->
</dependency>

回答by Achille_vanhoutte

have tried the following approach?

是否尝试过以下方法？

@Component
@PropertySource("database.properties")
public class DynamoClientMapper { ...}

or

或者

 @Service
 @PropertySource("database.properties")
 public class DynamoClientMapper { ...}

回答by jshcode

Instead of @EnableAutoConfiguration, use @Configuration as below. Also you will need to fix aws region property as its differing in name between prop file and code - [amazon.dynamodb.region vs amazon.aws.region] - this will throw error once it starts picking up property file after below change..

使用@Configuration 代替@EnableAutoConfiguration，如下所示。此外，您还需要修复 aws 区域属性，因为它在 prop 文件和代码之间的名称不同 - [amazon.dynamodb.region vs amazon.aws.region] - 在以下更改后开始拾取属性文件时，这将引发错误..

@Configuration
@PropertySource("database.properties")
public class DynamoClientMapper {

    @Value("${amazon.dynamodb.endpoint}")
    private String amazonDynamoDBEndpoint;

    @Value("${amazon.aws.accesskey}")
    private String amazonAWSAccessKey;

    @Value("${amazon.aws.secretkey}")
    private String amazonAWSSecretKey;

    @Value("${amazon.aws.region}")
    private String amazonAWSRegion;

回答by Torsten

In your screenshot it seems like you are using Intellij. If so, you can clearly see, that your resourcesfolder in not declared as Test Ressources Root. Do this and recompile.

在您的屏幕截图中，您似乎正在使用 Intellij。如果是这样，您可以清楚地看到，您的resources文件夹未声明为Test Ressources Root. 这样做并重新编译。

回答by slartidan

Please double-check, that your maven-pom uses this packaging:

请仔细检查，您的 maven-pom 是否使用此包装：

<packaging>war</packaging>

If it is set to pomor similar, your IDE might not recognize the "Spring"-nature of your module (happend to me in IntelliJ 2018).

如果设置为pom或类似，您的 IDE 可能无法识别模块的“Spring”性质（在 IntelliJ 2018 中发生在我身上）。

回答by SJX

You can use also a fixed path.

您也可以使用固定路径。

@PropertySource("file:${C:/Development/workspace/Project/resources/}/application.properties")

@PropertySource("file:${C:/Development/workspace/Project/resources/}/application.properties")

Helpful in development process where you want to use different property files.

在要使用不同属性文件的开发过程中很有帮助。