Question

我尝试使用aws更新我的dynamodb，但我无法创建一个dynamodb对象或一个表对象，因为import com.amazonaws.services.dynamodbv2.**document**.*没有注册文档，但它读取所有其他导入：

import com.amazonaws.services.dynamodbv2.AmazonDynamoDBClient;
import com.amazonaws.services.dynamodbv2.model.AttributeDefinition;
import com.amazonaws.services.dynamodbv2.model.CreateTableRequest;
import com.amazonaws.services.dynamodbv2.model.KeySchemaElement;
import com.amazonaws.services.dynamodbv2.model.KeyType;
import com.amazonaws.services.dynamodbv2.model.ListTablesResult;
import com.amazonaws.services.dynamodbv2.model.ProvisionedThroughput;
import com.amazonaws.services.dynamodbv2.model.TableDescription;

以下是我正在使用的完整课程：

import android.Manifest;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.location.LocationManager;
import android.os.Bundle;
import android.provider.Settings;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.widget.Toast;
import com.amazonaws.services.dynamodbv2.AmazonDynamoDBClient;
import com.amazonaws.services.dynamodbv2.model.UpdateItemRequest;
import java.util.Arrays;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;

import com.amazonaws.services.dynamodbv2.document.Table;
import com.amazonaws.services.dynamodbv2.document.spec.UpdateItemSpec;
import com.amazonaws.services.dynamodbv2.document.utils.ValueMap;
import com.amazonaws.auth.profile.ProfileCredentialsProvider;
import com.amazonaws.services.dynamodbv2.AmazonDynamoDBClient;
import com.amazonaws.services.dynamodbv2.document.DynamoDB;
import com.amazonaws.services.dynamodbv2.document.Table;
import com.amazonaws.services.dynamodbv2.document.TableCollection;
import com.amazonaws.services.dynamodbv2.document.Table;
import com.amazonaws.services.dynamodbv2.document.spec.UpdateItemSpec;
import com.amazonaws.services.dynamodbv2.document.utils.ValueMap;
import com.amazonaws.auth.profile.ProfileCredentialsProvider;
import com.amazonaws.services.dynamodbv2.AmazonDynamoDBClient;
import com.amazonaws.services.dynamodbv2.document.DynamoDB;
import com.amazonaws.services.dynamodbv2.document.Table;
import com.amazonaws.services.dynamodbv2.document.TableCollection;
import com.amazonaws.services.dynamodbv2.model.AttributeDefinition;
import com.amazonaws.services.dynamodbv2.model.CreateTableRequest;
import com.amazonaws.services.dynamodbv2.model.KeySchemaElement;
import com.amazonaws.services.dynamodbv2.model.KeyType;
import com.amazonaws.services.dynamodbv2.model.ListTablesResult;
import com.amazonaws.services.dynamodbv2.model.ProvisionedThroughput;
import com.amazonaws.services.dynamodbv2.model.TableDescription;

public class LoadingPage extends AppCompatActivity {
    static AmazonDynamoDBClient dynamoDB;
    LocationManager locationmanager;
    private TrackGPS gps;
    double longitude;
    double latitude;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_loading_page);
        gps = new TrackGPS(LoadingPage.this);
        DynamoDB dynamoDB = new DynamoDB(new AmazonDynamoDBClient(
                new ProfileCredentialsProvider()));

        Table table = dynamoDB.getTable("ProductCatalog");

        Map<String, String> expressionAttributeNames = new HashMap<String, String>();
        expressionAttributeNames.put("#A", "Authors");
        expressionAttributeNames.put("#P", "Price");
        expressionAttributeNames.put("#I", "ISBN");

        Map<String, Object> expressionAttributeValues = new HashMap<String, Object>();
        expressionAttributeValues.put(":val1",
                new HashSet<String>(Arrays.asList("Author YY","Author ZZ")));
        expressionAttributeValues.put(":val2", 1);   //Price

        UpdateItemOutcome outcome =  table.updateItem(
                "Id",          // key attribute name
                101,           // key attribute value
                "add #A :val1 set #P = #P - :val2 remove #I", 
                expressionAttributeNames,
                expressionAttributeValues);

Answer 1

我遇到了类似的问题，并且我了解到软件包的可用性和/或源存储库会随着时间的推移而变化。因此，如果无法解决导入问题，则以下过程可能会有所帮助。

标识提供依赖项的软件包。
找到软件包的来源。
使用Gradle或Maven配置源。

对于我的回答，我在Kotlin下针对com.amazonaws:DynamoDBLocal:1.11.477验证了您想要的导入。

我从artifact page at MVNRepository中选择了查看全部。

这导致我进入了具有以下URL的存储库源：

https://repository.mulesoft.org/nexus/content/repositories/public/com/amazonaws/DynamoDBLocal/1.11.477/

自从我使用Kotlin以来，我就在repositories的Gradle中向build.gradle.kts添加了相应的存储库数据。

// Local DynamoDB.

repositories {
    maven(url = "https://repository.mulesoft.org/nexus/content/repositories/public")
}

dependencies {
    implementation ("com.amazonaws:DynamoDBLocal:1.11.477")
}

对于非本地情况，也可以从以下软件包获得这些进口：

http://central.maven.org/maven2/com/amazonaws/aws-java-sdk-dynamodb/1.11.564/

因此，以下条目也适用：

// Remote DynamoDB.

repositories {
    mavenCentral()
}

dependencies {
    implementation("com.amazonaws:aws-java-sdk-dynamodb:1.11.564")
}

在为本地或远程版本配置项目后，我能够验证所有包含“文档” 的导入文件都是可用的。

Answer 2

我假设您已经尝试过这个，但它对我有用，所以我还是要提一下：我确保已经添加了AWS SDK for Java库，然后我刷新了项目。现在一切正常！

我关闭了我的项目并多次重新打开但没有成功，但刷新项目就行了。祝你好运。

import com.amazonaws.services.dynamodbv2.document.DynamoDB;导入的文档部分无法解析

2 个答案: