基于范例，也稍微记录下DynamoDB的用法
STEP1，获取授权，
和S3的步骤类似，都是AWS的服务，授权这块的逻辑是类似的，建立链接前都需要这一步
AWSCredentials credentials = null;
try {
credentials = new ProfileCredentialsProvider("DynamoDBManager").getCredentials();
//credentials = new BasicAWSCredentials("AKIAJTY2VTO7V6OVJQOQ", "WFvY61Ft6hLjCcK+YoARvd94BLHRb3oKkP7LJ8X/");
} catch (Exception e) {
throw new AmazonClientException(
"Cannot load the credentials from the credential profiles file. " +
"Please make sure that your credentials file is at the correct " +
"location (C:\\Users\\guoyu\\.aws\\credentials), and is in valid format.",
e);
}
STEP2，建立链接
dynamoDB = new AmazonDynamoDBClient(credentials);
Region tmpAP_NORTHEAST_1 = Region.getRegion(Regions.AP_NORTHEAST_1);
dynamoDB.setRegion(tmpAP_NORTHEAST_1);
是不是发现和S3很像。。。确实很像。。。。
STEP3，
建表
// Create a table with a primary hash key named 'name', which holds a string
CreateTableRequest createTableRequest = new CreateTableRequest().withTableName(tableName)
.withKeySchema(new KeySchemaElement().withAttributeName("name").withKeyType(KeyType.HASH))
.withAttributeDefinitions(new AttributeDefinition().withAttributeName("name").withAttributeType(ScalarAttributeType.S))
.withProvisionedThroughput(new ProvisionedThroughput().withReadCapacityUnits(10L).withWriteCapacityUnits(10L));
加数据
Map<String, AttributeValue> item = newItem("Bill & Ted's Excellent Adventure", 1989, "****", "James", "Sara");
PutItemRequest putItemRequest = new PutItemRequest(tableName, item);
PutItemResult putItemResult = dynamoDB.putItem(putItemRequest);
查数据
HashMap<String, Condition> scanFilter = new HashMap<String, Condition>();
Condition condition = new Condition()
.withComparisonOperator(ComparisonOperator.GT.toString())
.withAttributeValueList(new AttributeValue().withN("1970"));
scanFilter.put("year", condition);
ScanRequest scanRequest = new ScanRequest(tableName).withScanFilter(scanFilter);
ScanResult scanResult = dynamoDB.scan(scanRequest);
以上。
和S3不同的是，DynamoDB可以下载一个本地版本，用于开发目的，当然如果你不介意的话，服务器部署也不是没可能。
需要JAVA环境，我是在VPS上跑的，CentOS7.当然这样别人也能访问编辑了。。。。
类似这样的东西
