Spring Boot无法识别application.properties文件
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似乎没有获得这些属性。它确实选择了我存储在同一文件中的“server.default”密钥，因此它肯定会识别文件本身。
这是我的application.properties文件和我正在尝试将属性加载到（ DynamoDBClientMapper ）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
这是我的项目结构：
这是我正在尝试加载属性的相关类。我尝试使用新的属性文件 @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;
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);
}
}
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$1.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
我尝试过制作另一个单独的database.properties文件，但Spring Boot也没有认识到这一点。我做错了什么？
8 个答案:
答案 0 :(得分：18)
您可以尝试在pom.xml文件的build部分中定义resources标记。设置资源目录的路径，其中application.properties
<build>
<resources>
<resource>
<directory>resources</directory>
<targetPath>${project.build.outputDirectory}</targetPath>
<includes>
<include>application.properties</include>
</includes>
</resource>
</resources>
</build>
资源链接：https://stackoverflow.com/a/30595114/2293534
另一种方法：
如果您使用spring 3.X版本，则可以添加@PropertySource("application.properties")
@Configuration
@PropertySource(value = "classpath:application.properties")
public class ApplicationConfig {
// more configuration ...
}
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")
})
详细信息在我的另一个答案中给出：https://stackoverflow.com/a/43659158/2293534
更新＃1：
将App.java类替换为以下类
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;
}
对于java.io.FileNotFoundException：
使用以下
@PropertySource(value = "database.properties", ignoreResourceNotFound = true)
更新＃2：
我已按照以下步骤运行您的应用程序。它运行成功。
-
转到存在pom.xml的项目文件夹。
-
pom.xml上有一些错误和警告。我澄清了一切。
-
打开命令提示符并运行
mvn clean -
运行
mvn clean install -
最后
mvn spring-boot:run
然后在浏览器中，我运行＆＃34; http://localhost:8080/＆＃34;
成功打开项目。我也搜索了其他页面也成功打开了。
首页如下http://localhost:8080/
查看以下所有网页：http://localhost:8080/api/reviews
[{＆＃34; id＆＃34;：1，＆＃34; userName＆＃34;：＆＃34; ychennay＆＃34;，＆＃34; reviewText＆＃34;：＆＃34;这家餐厅是！了不起＃＆34;}，{＆＃34; ID＆＃34;：2＆＃34;用户名＆＃34;：＆＃34;大卫＆＃34;＆＃34; reviewText＆＃34;：＆＃34这家餐厅 没关系！＆＃34;}，{＆＃34; id＆＃34;：3，＆＃34; userName＆＃34;：＆＃34; ben＆＃34;，＆＃34; reviewText＆＃34;：＆＃ 34;这家餐厅是 ！平庸＃＆34;}，{＆＃34; ID＆＃34：4，＆＃34;用户名＆＃34;：＆＃34;莱昂＆＃34;＆＃34; reviewText＆＃34;：＆＃34这家餐厅 很糟糕！＆＃34;}，{＆＃34; id＆＃34;：5，＆＃34; userName＆＃34;：＆＃34; lawrence＆＃34;，＆＃34; reviewText＆＃34;：＆＃ 34;此 餐厅很混乱！＆＃34;}]
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>
<jackson.version>2.7.5</jackson.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.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>${jackson.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.38</version> <!-- You have missed to add this version -->
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-security -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
<version>${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>
错误和解决方案：
<强>问题＃1：
[警告]＆＃39; dependencies.dependency.scope＆＃39;对于org.springframework.data:spring-data-releasetrain:pom必须是其中之一 [提供，编译，运行时，测试，系统]但是“导入”＃。 @第70行， 第18栏
<强>溶液＃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>
<强>问题＃2：
[ERROR]＆＃39; dependencies.dependency.version＆＃39;对于org.springframework.boot：spring-boot-devtools：jar丢失了。 @ line 73，第19栏
<强>溶液＃2：
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<version>${spring-boot-version}</version> <!-- You have missed to add this version -->
<optional>true</optional>
</dependency>
<强>问题＃3：
[ERROR]＆＃39; dependencies.dependency.version＆＃39;对于org.springframework.boot：spring-boot-configuration-processor：jar是 失踪。 @第78行，第19栏
<强>解决方案＃3：
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-configuration-processor</artifactId>
<version>${spring-boot-version}</version> <!-- You have missed to add this version -->
<optional>true</optional>
</dependency>
<强>问题＃4：
[警告]＆＃39; dependencies.dependency.scope＆＃39;对于com.amazonaws：aws-java-sdk-bom：pom必须是[提供，编译， 运行时，测试，系统]但是“导入”＃。 @第105行，第18栏
<强>溶液＃4：
<dependency>
<groupId>com.amazonaws</groupId>
<artifactId>aws-java-sdk-bom</artifactId>
<version>${aws-sdk-java-version}</version>
<type>pom</type>
<!-- <scope>import</scope> -->
<scope>provided</scope> <!-- changed import to provided -->
</dependency>
<强>问题＃5：
[ERROR]＆＃39; dependencies.dependency.version＆＃39;对于mysql：mysql-connector-java：jar丢失了。 @第148行，第19栏
<强>解决方案＃5：
<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.38</version> <!-- You have missed to add this version -->
</dependency>
答案 1 :(得分：2)
而不是@EnableAutoConfiguration，使用@Configuration，如下所示。此外，您将需要修复aws region属性，因为它在prop文件和代码之间的名称不同 - [amazon.dynamodb.region vs amazon.aws.region] - 一旦它在下面的更改后开始拾取属性文件，这将抛出错误。
@Configuration
@PropertySource("database.properties")
public class DynamoClientMapper {
@Value("${amazon.dynamodb.endpoint}")
private String amazonDynamoDBEndpoint;
@Value("${amazon.aws.accesskey}")
private String amazonAWSAccessKey;
@Value("${amazon.aws.secretkey}")
private String amazonAWSSecretKey;
@Value("${amazon.aws.region}")
private String amazonAWSRegion;
答案 2 :(得分：0)
尝试了以下方法吗？
@Component
@PropertySource("database.properties")
public class DynamoClientMapper { ...}
或
@Service
@PropertySource("database.properties")
public class DynamoClientMapper { ...}
答案 3 :(得分：0)
在屏幕截图中，您似乎正在使用Intellij。如果是这样，您可以清楚地看到您的resources文件夹未声明为Test Ressources Root。执行此操作，然后重新编译。
答案 4 :(得分：0)
请仔细检查，您的maven-pom是否使用此包装：
<packaging>war</packaging>
如果将其设置为pom或类似名称，则您的IDE可能无法识别模块的“ Spring”性质（在IntelliJ 2018中发生在我身上）。
答案 5 :(得分：0)
您也可以使用固定路径。
@PropertySource（“文件：$ {C：/ Development / workspace / Project / resources /} / application.properties”）
在使用不同属性文件的开发过程中很有用。
答案 6 :(得分：0)
问题可能还在于，您的spring-data-jpa的依赖项在依赖项的层次结构中重复，因此，对于环境，您有2套不同的配置文件，运行该应用程序时，运行程序正在使用一套有害环境。
api("org.springframework.data", "spring-data-jpa", "2.3.4.RELEASE")
因此，我建议检查项目模块，如果在一个层次结构中不只一个定义的依赖项下载。尽管没有必要删除重新出现或重复的内容，但有必要注释和取消注释它们以重新同步，并使SpringRunner能够采用所需的一组环境。
- 评论依赖
- 同步
- 取消注释依赖
- 同步
- 运行应用
Gradle的东西
GL
答案 7 :(得分：0)
确保属性文件末尾没有 .txt 扩展名。
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