本文為英文版的機器翻譯版本，如內容有任何歧義或不一致之處，概以英文版為準。

# 建置增強型文件
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`[EnhancedDocument](https://sdk.amazonaws.com/java/api/latest/software/amazon/awssdk/enhanced/dynamodb/document/EnhancedDocument.html)` 代表文件類型物件，具有具有巢狀屬性的複雜結構。`EnhancedDocument` 需要最上層屬性，以符合為 指定的主索引鍵屬性`DocumentTableSchema`。其餘內容是任意的，可以包含頂層屬性和深度巢狀屬性。

您可以使用提供數種新增元素方式的建置器來建立`EnhancedDocument`執行個體。

## 從 JSON 字串建置
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使用 JSON 字串，您可以在一個方法呼叫`EnhancedDocument`中建置 。下列程式碼片段`EnhancedDocument`會從`jsonPerson()`協助程式方法傳回的 JSON 字串建立 。`jsonPerson()` 方法會傳回先前顯示[的人員物件](ddb-en-client-doc-api-steps.md#ddb-en-client-doc-api-steps-createschema-obj)的 JSON 字串版本。

```
EnhancedDocument document = 
        EnhancedDocument.builder()
                        .json( jsonPerson() )
                        .build());
```

## 從個別元素建置
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或者，您可以使用建置器的類型安全方法，從個別元件建置`EnhancedDocument`執行個體。

下列範例會建置`person`增強型文件，類似於上一個範例中從 JSON 字串建置的增強型文件。

```
        /* Define the shape of an address map whose JSON representation looks like the following.
           Use 'addressMapEnhancedType' in the following EnhancedDocument.builder() to simplify the code.
           "home": {
             "zipCode": "00000",
             "city": "Any Town",
             "state": "FL",
             "street": "123 Any Street"
           }*/
        EnhancedType<Map<String, String>> addressMapEnhancedType =
                EnhancedType.mapOf(EnhancedType.of(String.class), EnhancedType.of(String.class));


        //  Use the builder's typesafe methods to add elements to the enhanced document.
        EnhancedDocument personDocument = EnhancedDocument.builder()
                .putNumber("id", 50)
                .putString("firstName", "Shirley")
                .putString("lastName", "Rodriguez")
                .putNumber("age", 53)
                .putNull("nullAttribute")
                .putJson("phoneNumbers", phoneNumbersJSONString())
                /* Add the map of addresses whose JSON representation looks like the following.
                        {
                          "home": {
                            "zipCode": "00000",
                            "city": "Any Town",
                            "state": "FL",
                            "street": "123 Any Street"
                          }
                        } */
                .putMap("addresses", getAddresses(), EnhancedType.of(String.class), addressMapEnhancedType)
                .putList("hobbies", List.of("Theater", "Golf"), EnhancedType.of(String.class))
                .build();
```

### 協助程式方法
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```
    private static String phoneNumbersJSONString() {
        return "  [" +
                "    {" +
                "      \"type\": \"Home\"," +
                "      \"number\": \"555-0140\"" +
                "    }," +
                "    {" +
                "      \"type\": \"Work\"," +
                "      \"number\": \"555-0155\"" +
                "    }" +
                "  ]";
    }

    private static Map<String, Map<String, String>> getAddresses() {
        return Map.of(
                "home", Map.of(
                        "zipCode", "00002",
                        "city", "Any Town",
                        "state", "ME",
                        "street", "123 Any Street"));

    }
```