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# IAM 策略生成器 API 从版本 1 到版本 2 的变化
<a name="migration-iam-policy-builder"></a>

本主题详细说明了 IAM 策略生成器 API 从版本 1（v1）到版本 2（v2）发生的变化。

## 高级别更改
<a name="migration-iam-policy-builder-high-level"></a>


****  

| 更改 | v1 |  v2 | 
| --- | --- | --- | 
|    Maven 依赖项  |  <pre><dependencyManagement><br />    <dependencies><br />        <dependency><br />            <groupId>com.amazonaws</groupId><br />            <artifactId>aws-java-sdk-bom</artifactId><br />            <version>1.12.5871</version><br />            <type>pom</type><br />            <scope>import</scope><br />        </dependency><br />    </dependencies><br /></dependencyManagement><br /><dependencies><br />    <dependency><br />        <groupId>com.amazonaws</groupId><br />        <artifactId>aws-java-sdk-core</artifactId><br />    </dependency><br /></dependencies></pre>  |  <pre><dependencyManagement><br />    <dependencies><br />        <dependency><br />            <groupId>software.amazon.awssdk</groupId><br />            <artifactId>bom</artifactId><br />            <version>2.27.212</version><br />            <type>pom</type><br />            <scope>import</scope><br />        </dependency><br />    </dependencies><br /></dependencyManagement><br /><dependencies><br />    <dependency><br />        <groupId>software.amazon.awssdk</groupId><br />        <artifactId>iam-policy-builder</artifactId><br />    </dependency><br /></dependencies></pre>  | 
| 软件包名称 | com.amazonaws.auth.policy | software.amazon.awssdk.policybuilder.iam | 
| 类名 |  [Policy](https://docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/com/amazonaws/auth/policy/Policy.html) [Statement](https://docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/com/amazonaws/auth/policy/Statement.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/zh_cn/sdk-for-java/latest/developer-guide/migration-iam-policy-builder.html)  |  [IamPolicy](https://sdk.amazonaws.com/java/api/latest/software/amazon/awssdk/policybuilder/iam/IamPolicy.html) [IamStatement](https://sdk.amazonaws.com/java/api/latest/software/amazon/awssdk/policybuilder/iam/IamStatement.html) [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/zh_cn/sdk-for-java/latest/developer-guide/migration-iam-policy-builder.html)  | 

1 [最新版本](https://central.sonatype.com/artifact/com.amazonaws/aws-java-sdk-bom)。2 [最新版本](https://central.sonatype.com/artifact/software.amazon.awssdk/bom)。

## API 更改
<a name="migration-iam-policy-builder-api"></a>


****  

| 设置 | v1 |  v2 | 
| --- | --- | --- | 
|  实例化策略 |  <pre>Policy policy = new Policy();</pre>  |  <pre>IamPolicy.Builder policyBuilder = IamPolicy.builder();<br />...<br />IamPolicy policy = policyBuilder.build();</pre>  | 
|    设置 ID  |  <pre>policy.withtId(...);<br />policy.setId(...);</pre>  |  <pre>policyBuilder.id(...);</pre>  | 
|    设置版本  | 不适用 - 使用默认版本 2012-10-17 |  <pre>policyBuilder.version(...);</pre>  | 
|    创建语句  |  <pre>Statement statement = <br />    new Statement(Effect.Allow)<br />            .withActions(...)<br />            .withConditions(...)<br />            .withId(...)<br />            .withPrincipals(...)<br />            .withResources(...);</pre>  |  <pre>IamStatement statement = <br />    IamStatement.builder()<br />            .effect(IamEffect.ALLOW)<br />            .actions(...)<br />            .notActions(...)<br />            .conditions(...)<br />            .sid(...)<br />            .principals(...)<br />            .notPrincipals(...)<br />            .resources(...)<br />            .notResources(...)<br />            .build()</pre>  | 
|    设置语句  |  <pre>policy.withStatements(statement);<br />policy.setStatements(statement);</pre>  |  <pre>policyBuilder.addStatement(statement);</pre>  | 

## 构建语句时的差异
<a name="migration-iam-policy-builder-statement"></a>

### 操作
<a name="migration-iam-policy-builder-statement-actions"></a>

#### v1
<a name="migration-iam-policy-builder-statement-actions.v1"></a>

v1 SDK 为服务操作使用 [`enum` 类型](https://docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/com/amazonaws/auth/policy/Action.html)，表示策略语句中的 `[https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies_elements_action.html](https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies_elements_action.html)` 元素。以下 `enum` 类型是一些示例。
+ `[IdentityManagementActions](https://docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/com/amazonaws/auth/policy/actions/IdentityManagementActions.html)`
+ `[DynamoDBv2Actions](https://docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/com/amazonaws/auth/policy/actions/DynamoDBv2Actions.html)`
+ `[SQSActions](https://docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/com/amazonaws/auth/policy/actions/SQSActions.html)`

以下示例显示 `SQSActions` 的 `SendMessage` 常量。

```
Action action = SQSActions.SendMessage;
```

在 v1 中，您无法为语句指定 `[https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies_elements_notaction.html](https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies_elements_notaction.html)` 元素。

#### v2
<a name="migration-iam-policy-builder-statement-actions.v2"></a>

在 v2 中，[IamAction](https://sdk.amazonaws.com/java/api/latest/software/amazon/awssdk/policybuilder/iam/IamAction.html)接口代表所有操作。要指定[特定于服务的操作](https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies_elements_action.html)元素，请向 `create` 方法传递一个字符串，如以下代码所示。

```
IamAction action = IamAction.create("sqs:SendMessage");
```

如以下代码所示，使用 v2 时，您可为语句指定 `[https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies_elements_notaction.html](https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies_elements_notaction.html)`。

```
IamAction action = IamAction.create("sqs:SendMessage");
IamStatement.builder().addNotAction(action);
```

### Conditions
<a name="migration-iam-policy-builder-statement-conditions"></a>

#### v1
<a name="migration-iam-policy-builder-statement-conditions-v1"></a>

为了表示语句条件，v1 SDK 使用 [https://docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/com/amazonaws/auth/policy/Condition.html](https://docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/com/amazonaws/auth/policy/Condition.html) 的子类。
+  [ArnCondition](https://docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/com/amazonaws/auth/policy/conditions/ArnCondition.html) 
+  [BooleanCondition](https://docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/com/amazonaws/auth/policy/conditions/BooleanCondition.html)
+  [DateCondition](https://docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/com/amazonaws/auth/policy/conditions/DateCondition.html)
+ [IpAddressCondition](https://docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/com/amazonaws/auth/policy/conditions/IpAddressCondition.html)
+ [NumericCondition](https://docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/com/amazonaws/auth/policy/conditions/NumericCondition.html)
+ [ StringCondition ](https://docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/com/amazonaws/auth/policy/conditions/StringCondition.html)

每个 `Condition` 子类都定义一个比较 `enum` 类型来帮助定义条件。例如，下面显示了条件的*不相似*[字符串比较](https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies_elements_condition_operators.html#Conditions_String)。

```
Condition condition = new StringCondition(StringComparisonType.StringNotLike, "key", "value");
```

#### v2
<a name="migration-iam-policy-builder-statement-conditions-v2"></a>

在 v2 中，您可以使用 `[IamCondition](https://sdk.amazonaws.com/java/api/latest/software/amazon/awssdk/policybuilder/iam/IamCondition.html)` 并提供 `[IamConditionOperator](https://sdk.amazonaws.com/java/api/latest/software/amazon/awssdk/policybuilder/iam/IamConditionOperator.html)`（包含所有类型的 `enums` 条件）来为策略语句构建条件。

```
IamCondition condition = IamCondition.create(IamConditionOperator.STRING_NOT_LIKE, "key", "value");
```

### 资源
<a name="migration-iam-policy-builder-statement-resources"></a>

#### v1
<a name="migration-iam-policy-builder-statement-resources-v1"></a>

策略语句的 `[https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies_elements_resource.html](https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies_elements_resource.html)` 元素用 SDK 的 `[Resource](https://docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/com/amazonaws/auth/policy/Resource.html)` 类表示。在构造函数中以字符串形式提供 ARN。以下子类提供了便捷的构造函数。
+ [S3BucketResource](https://docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/com/amazonaws/auth/policy/resources/S3BucketResource.html)
+ [S3ObjectResource](https://docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/com/amazonaws/auth/policy/resources/S3ObjectResource.html)
+ [SQSQueue资源](https://docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/com/amazonaws/auth/policy/resources/SQSQueueResource.html)

在 v1 中，您可以通过调用 `withIsNotType` 方法为 `[Resource](https://docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/com/amazonaws/auth/policy/Resource.html)` 指定 `[https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies_elements_notresource.html](https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies_elements_notresource.html)` 元素，如以下语句所示。

```
Resource resource = new Resource("arn:aws:s3:::amzn-s3-demo-bucket").withIsNotType(true);
```

#### v2
<a name="migration-iam-policy-builder-statement-resources-v2"></a>

在 v2 中，您可以通过将 ARN 传递给 `IamResource.create` 方法来创建 `[https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies_elements_resource.html](https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies_elements_resource.html)` 元素。

```
IamResource resource = IamResource.create("arn:aws:s3:::amzn-s3-demo-bucket");
```

`[IamResource](https://sdk.amazonaws.com/java/api/latest/software/amazon/awssdk/policybuilder/iam/IamResource.html)` 可以设置为 *[https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies_elements_notresource.html](https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies_elements_notresource.html)* 元素，如以下代码段所示。

```
IamResource resource = IamResource.create("arn:aws:s3:::amzn-s3-demo-bucket");
IamStatement.builder().addNotResource(resource);
```

`IamResource.ALL` 表示所有资源。

### 主体
<a name="migration-iam-policy-builder-statement-principal"></a>

#### v1
<a name="migration-iam-policy-builder-statement-principal-v1"></a>

v1 SDK 提供以下 `[Principal](https://docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/com/amazonaws/auth/policy/Principal.html)` 类来表示包括所有成员的主体的类型：
+ `AllUsers`
+ `AllServices`
+ `AllWebProviders`
+ `All`

您无法向语句添加 `[https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies_elements_notprincipal.html](https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies_elements_notprincipal.html)` 元素。

#### v2
<a name="migration-iam-policy-builder-statement-principal-v2"></a>

在 v2 中，`IamPrincipal.ALL` 表示所有主体：

要表示其他类型主体中的所有成员，请在创建 `IamPrincipal` 时使用 `[IamPrincipalType](https://sdk.amazonaws.com/java/api/latest/software/amazon/awssdk/policybuilder/iam/IamPrincipalType.html)` 类。
+ `IamPrincipal.create(IamPrincipalType.AWS,"*")` 适用于所有用户。
+ `IamPrincipal.create(IamPrincipalType.SERVICE,"*")` 适用于所有服务。
+ `IamPrincipal.create(IamPrincipalType.FEDERATED,"*")` 适用于所有 Web 提供程序。
+ `IamPrincipal.create(IamPrincipalType.CANONICAL_USER,"*")` 适用于所有规范用户。

在创建策略语句时，您可以使用 `addNotPrincipal` 方法来表示 `[https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies_elements_notprincipal.html](https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies_elements_notprincipal.html)` 元素，如以下语句所示。

```
IamPrincipal principal = IamPrincipal.create(IamPrincipalType.AWS, "arn:aws:iam::444455556666:root");
IamStatement.builder().addNotPrincipal(principal);
```