aws s3 withRegion:无法解析方法“withRegion(com.amazonaws.regions.Regions)”

Question

尝试使用aws s3 java api创建AmazonS3ClientBuilder对象并获取错误

如下所示：

https://docs.aws.amazon.com/code-samples/latest/catalog/java-s3-src-main-java-aws-example-s3-PutObject.java.html

使用( S3 )：

<dependency>
    <groupId>com.amazonaws</groupId>
    <artifactId>aws-java-sdk-s3</artifactId>
    <version>1.11.651</version>
</dependency>

代码：

AmazonS3 s3 = AmazonS3ClientBuilder.standard().withRegion(Regions.DEFAULT_REGION).build();

错误：

无法解析方法“withRegion(com.amazonaws.regions.Regions)”

这是个窃听器还是我做错什么了？

我正在使用Java 8，IntelliJ IDE和Maven for build工具.

更新(15/10/19 @8:48 15)：

我的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/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>helloworld</groupId>
    <artifactId>HelloWorld</artifactId>
    <version>1.0</version>
    <packaging>jar</packaging>
    <name>A sample Hello World created for SAM CLI.</name>
    <properties>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>

    <dependencies>
        <dependency>
            <groupId>com.amazonaws</groupId>
            <artifactId>aws-lambda-java-core</artifactId>
            <version>1.2.0</version>
        </dependency>
        <dependency>
          <groupId>junit</groupId>
          <artifactId>junit</artifactId>
          <version>4.12</version>
          <scope>test</scope>
        </dependency>
        <dependency>
            <!-- jsoup HTML parser library @ https://jsoup.org/ -->
            <groupId>org.jsoup</groupId>
            <artifactId>jsoup</artifactId>
            <version>1.12.1</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/com.amazonaws/aws-lambda-java-events -->
        <dependency>
            <groupId>com.amazonaws</groupId>
            <artifactId>aws-lambda-java-events</artifactId>
            <version>2.2.7</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/com.amazonaws/aws-java-sdk -->
        <dependency>
            <groupId>com.amazonaws</groupId>
            <artifactId>aws-java-sdk</artifactId>
            <version>1.11.651</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/software.amazon.awssdk/sdk-core -->
        <dependency>
            <groupId>com.amazonaws</groupId>
            <artifactId>aws-java-sdk-core</artifactId>
            <version>1.11.0</version>
        </dependency>
        <dependency>
            <groupId>com.amazonaws</groupId>
            <artifactId>aws-java-sdk-dynamodb</artifactId>
            <version>1.11.0</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/com.google.code.gson/gson -->
        <dependency>
            <groupId>com.google.code.gson</groupId>
            <artifactId>gson</artifactId>
            <version>2.8.6</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/com.amazonaws/aws-java-sdk-s3 -->
        <dependency>
            <groupId>com.amazonaws</groupId>
            <artifactId>aws-java-sdk-s3</artifactId>
            <version>1.11.651</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.freemarker/freemarker -->
        <dependency>
            <groupId>org.freemarker</groupId>
            <artifactId>freemarker</artifactId>
            <version>2.3.20</version>
        </dependency>



    </dependencies>

    <build>
      <plugins>
        <plugin>
          <groupId>org.apache.maven.plugins</groupId>
          <artifactId>maven-shade-plugin</artifactId>
          <version>3.1.1</version>
          <configuration>
          </configuration>
          <executions>
            <execution>
              <phase>package</phase>
              <goals>
                <goal>shade</goal>
              </goals>
            </execution>
          </executions>
        </plugin>
      </plugins>
    </build>
</project>

Answer 1

我猜问题在于您在pom文件中添加了aws-java-sdk-dynamodb依赖项。这在内部依赖于aws-java-sdk-s3。

因为依赖版本是1.11.0，所以这个版本的aws-java-sdk-s3中可能没有withRegion方法(但是没有检查)

试着把这个版本升级到最新版本，我想你的问题应该解决了。

如果仍然看到相同的问题，请尝试通过发出命令mvn dependency:tree来发布依赖树结果