通过查阅官方文档和支持社区，找到以下解决办法：

1. 确保eb_codebuild_settings在buildspec.yml中已正确设置，并使用正确的语法。示例代码如下：

version: 0.2

phases: install: runtime-versions: java: corretto11 docker: 18

pre_build: commands: - echo Logging in to Amazon ECR... - aws --version - $(aws ecr get-login --region $AWS_DEFAULT_REGION --no-include-email) - IMAGE_TAG=$(echo $CODEBUILD_RESOLVED_SOURCE_VERSION) - IMAGE_URI=$REPOSITORY_URI:$IMAGE_TAG - echo $IMAGE_URI

build: commands: - echo Build started on date - echo Building the Docker image... - docker build -t $IMAGE_URI . - docker tag $IMAGE_URI $REPOSITORY_URI:latest

post_build: commands: - echo Build completed on date - echo Pushing the Docker images... - docker push $REPOSITORY_URI:$IMAGE_TAG - docker push $REPOSITORY_URI:latest - aws elasticbeanstalk create-application-version --application-name $APP_NAME --version-label $IMAGE_TAG --description "Created by AWS CodeBuild" --source-bundle S3Bucket=$BUCKET,S3Key=$ZIP_FILE - aws elasticbeanstalk update-environment --environment-name $ENV_NAME --version-label $IMAGE_TAG

2. 确认AWS CLI已正确安装并已登录。运行以下命令确认CLI安装状态：

aws --version

运行以下命令登录CLI：

aws configure

3. 使用正确的选项和参数运行命令。例如，正确设置代码生成器环境变量：

export AWS_CODEBUILD_BUILD_IMAGE="aws/codebuild/amazonlinux2-x86_64-standard:3.0"