Description of adding new interfaces

https://gitee.com/openharmony/docs/issues/I5X82BSigned-off-by: Njiangkai43 <jiangkai43@huawei.com>

zh-cn/application-dev/reference/apis/js-apis-convertxml.md

@@ -14,8 +14,53 @@ import convertxml from '@ohos.convertxml';
 
 ## ConvertXML
 
+### convertToJSObject<sup>9+</sup>
 
-### convert
+convertToJSObject(xml: string, options?: ConvertOptions) : Object
+
+转换xml文本为JavaScript对象。
+
+**系统能力：** SystemCapability.Utils.Lang
+
+**参数：**
+
+| 参数名  | 类型                              | 必填 | 说明            |
+| ------- | --------------------------------- | ---- | --------------- |
+| xml     | string                            | 是   | 传入的xml文本。 |
+| options | [ConvertOptions](#convertoptions) | 否   | 转换选项。      |
+
+**返回值：**
+
+| 类型   | 说明                         |
+| ------ | ---------------------------- |
+| Object | 处理后返回的JavaScript对象。 |
+
+**示例：**
+
+```js
+let xml =
+    '<?xml version="1.0" encoding="utf-8"?>' +
+    '<note importance="high" logged="true">' +
+    '    <title>Happy</title>' +
+    '    <todo>Work</todo>' +
+    '    <todo>Play</todo>' +
+    '</note>';
+let conv = new convertxml.convertToJSObject();
+let options = {trim : false, declarationKey:"_declaration",
+    instructionKey : "_instruction", attributesKey : "_attributes",
+    textKey : "_text", cdataKey:"_cdata", doctypeKey : "_doctype",
+    commentKey : "_comment", parentKey : "_parent", typeKey : "_type",
+    nameKey : "_name", elementsKey : "_elements"}
+let result = JSON.stringify(conv.convert(xml, options));
+console.log(result);
+// 输出(宽泛型)
+// {"_declaration":{"_attributes":{"version":"1.0","encoding":"utf-8"}},"_elements":[{"_type":"element","_name":"note","_attributes":{"importance":"high","logged":"true"},"_elements":[{"_type":"element","_name":"title","_elements":[{"_type":"text","_text":"Happy"}]},{"_type":"element","_name":"todo","_elements":[{"_type":"text","_text":"Work"}]},{"_type":"element","_name":"todo","_elements":[{"_type":"text","_text":"Play"}]}]}]}
+```
+
+### convert<sup>(deprecated)</sup>
+
+> **说明：**<br/>
+> 从API Version 9开始废弃，建议使用[convertToJSObject9+](#converttojsobject9)替代。
 
 convert(xml: string, options?: ConvertOptions) : Object
 
@@ -23,7 +68,6 @@ convert(xml: string, options?: ConvertOptions) : Object
 
 **系统能力：** SystemCapability.Utils.Lang
 
-
 **参数：**
 
 | 参数名  | 类型                              | 必填 | 说明            |