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我有带有 aws jars 的 /aws 文件夹，我的主程序 Aws.class aws 也是一个包：

spectjrt.jar                           
aspectjweaver.jar                       
aws-java-sdk-1.9.23-javadoc.jar         
aws-java-sdk-1.9.23-sources.jar         
aws-java-sdk-1.9.23.jar                 
aws-java-sdk-flow-build-tools-1.9.23.jar
Aws.class                      
commons-codec-1.6.jar          
commons-logging-1.1.3.jar      
freemarker-2.3.18.jar          
httpclient-4.3.jar             
httpcore-4.3.jar               
jackson-annotations-2.3.0.jar  
jackson-core-2.3.2.jar         
jackson-databind-2.3.2.jar     
javax.mail-api-1.4.6.jar       
joda-time-2.2.jar              
namast1.csv                    
spring-beans-3.0.7.jar         
spring-context-3.0.7.jar       
spring-core-3.0.7.jar                  

aws.java 程序：

package aws;
import com.amazonaws.AmazonClientException;
import com.amazonaws.AmazonServiceException;
import com.amazonaws.auth.BasicAWSCredentials;
import com.amazonaws.auth.AWSCredentials;
import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.AmazonS3Client;
import com.amazonaws.services.s3.model.PutObjectRequest;
import java.io.File;
import java.io.IOException;


public class Aws {

   private static final String USERNAME = "xxx”;
private static final String PASSWORD =  "yyy";
private static final  String  FILEPATH = "/aws/";

private static final …