如何使用Spring Cloud AWS连接到S3？
我对Spring以及Amazon AWS都很陌生，所以如果我正在做一些可怕的错误，我会提前道歉。
我似乎无法让Spring Boot应用程序在部署到Elastic Beanstalk时以任何方式与AWS服务进行通信。 我一直在这里遵循指南，试图正确设置我的项目。
我基本上采取他们提供的代码并试图从我的项目运行：
@Component
public class Storage {
@Autowired
private ResourceLoader resourceLoader;
Logger logger = LoggerFactory.getLogger(this.getClass());
public Storage() {
}
public void writeResource() throws IOException {
Resource resource = this.resourceLoader.getResource("s3://server-images/rootFile.log");
WritableResource writableResource = (WritableResource) resource;
try (OutputStream outputStream = writableResource.getOutputStream()) {
outputStream.write("test".getBytes());
}
}
}
超级，似乎很简单。 我还设置了我的application.properties文件：
cloud.aws.credentials.accessKey = A******A
cloud.aws.credentials.secretKey = i******K
cloud.aws.credentials.instanceProfile = true
cloud.aws.region.auto = true
所以我在配置文件中设置了密钥和秘密，最后，我将这些内容添加到build.gradle文件中以获取Spring云的内容：
buildscript {
repositories {
mavenCentral()
}
dependencies {
classpath("org.springframework.boot:spring-boot-gradle-plugin:1.2.4.RELEASE")
classpath("io.spring.gradle:dependency-management-plugin:0.5.2.RELEASE")
}
}
apply plugin: 'java'
apply plugin: 'idea'
apply plugin: 'spring-boot'
apply plugin: 'war'
apply plugin: "io.spring.dependency-management"
war {
baseName = 'server'
// version = '0.0.1'
}
dependencyManagement {
imports {
mavenBom 'org.springframework.cloud:spring-cloud-aws:1.0.2.RELEASE'
}
}
//jar {
// baseName = 'gs-spring-boot'
// version = '0.1.0'
//}
repositories {
mavenCentral()
jcenter()
}
sourceCompatibility = 1.8
targetCompatibility = 1.8
configurations {
providedRuntime
}
dependencies {
// tag::jetty[]
// compile("org.springframework.boot:spring-boot-starter-web") {
// exclude module: "spring-boot-starter-tomcat"
//}
compile("org.springframework.boot:spring-boot-starter-web")
providedRuntime("org.springframework.boot:spring-boot-starter-tomcat")
// Spring Cloud AWS
compile 'org.springframework.cloud:spring-cloud-starter-aws'
//compile("org.springframework.boot:spring-boot-starter-jetty")
// end::jetty[]
// tag::actuator[]
compile("org.springframework.boot:spring-boot-starter-actuator")
compile("org.springframework.boot:spring-boot-starter-thymeleaf")
// end::actuator[]
testCompile("junit:junit")
}
task wrapper(type: Wrapper) {
gradleVersion = '2.4'
}
最后，我不知道这个问题有多重要，但是我给AWS中的elasticbeanstalk角色“AmazonS3FullAccess”和“AmazonEC2FullAccess”。 我还为“每个人”设置了权限以列出/上传/删除。
到目前为止，我所得到的是：
org.springframework.web.util.NestedServletException: Request processing failed; nested exception is java.lang.NullPointerException
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:978)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:868)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:644)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.springframework.boot.actuate.autoconfigure.EndpointWebMvcAutoConfiguration$ApplicationContextHeaderFilter.doFilterInternal(EndpointWebMvcAutoConfiguration.java:295)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.springframework.boot.actuate.trace.WebRequestTraceFilter.doFilterInternal(WebRequestTraceFilter.java:102)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:85)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.springframework.boot.actuate.autoconfigure.MetricsFilter.doFilterInternal(MetricsFilter.java:68)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.springframework.boot.context.web.ErrorPageFilter.doFilter(ErrorPageFilter.java:113)
at org.springframework.boot.context.web.ErrorPageFilter.access$000(ErrorPageFilter.java:59)
at org.springframework.boot.context.web.ErrorPageFilter$1.doFilterInternal(ErrorPageFilter.java:88)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.springframework.boot.context.web.ErrorPageFilter.doFilter(ErrorPageFilter.java:106)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.RemoteIpValve.invoke(RemoteIpValve.java:673)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:610)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:516)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1086)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:659)
at org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:223)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1558)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1515)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NullPointerException: null
at app.data.Storage.readTerminator(Storage.java:44)
at app.controllers.CodeController.getCode(CodeController.java:54)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:776)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:705)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966)
... 54 common frames omitted
正如我所见，resourceLoader没有得到任何东西
也许有一些权限问题？ 也许我错误地配置了它？ 我认为这不应该是这么难，所以我肯定做错了什么！ 如果任何人有任何想法，他们是非常受欢迎的。
布莱恩。
如果原因是错误的权限，则应检查您的用户（您在IAM中创建的）是否具有相应的权限（策略）：
AmazonS3FullAccess，AWSConnector
希望这会有所帮助。
检查您的存储桶策略是否允许您放入未加密的对象 。 如果这不是原因，那么为什么AWS S3不允许上传对象，可能还有其他原因。 当您使用本地AWS库时，他们设置了很多默认值，但弹簧库可能不会设置这些默认值。
我得到了同样的错误，直到我发现我的存储桶策略阻止了任何未加密的对象上传。
{
"Sid": "RequiredEncryptedPutObject",
"Effect": "Deny",
"Principal": "*",
"Action": "s3:PutObject",
"Resource": "arn:aws:s3:::my-bucket/*",
"Condition": {
"StringNotEquals": {
"s3:x-amz-server-side-encryption": [
"AES256",
"aws:kms"
]
}
}
},