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xml解析與生成

2024-01-23 18:20 更新

說明

本模塊首批接口從API version 8開始支持。后續(xù)版本的新增接口，采用上角標(biāo)單獨(dú)標(biāo)記接口的起始版本。

導(dǎo)入模塊


import xml from '@ohos.xml';

XmlSerializer

XmlSerializer接口用于生成XML文件。

constructor

constructor(buffer: ArrayBuffer | DataView, encoding?: string)

XmlSerializer的構(gòu)造函數(shù)。

系統(tǒng)能力： SystemCapability.Utils.Lang

參數(shù)：

參數(shù)名	類型	必填	說明
buffer	ArrayBuffer \| DataView	是	用于接收寫入xml信息的ArrayBuffer或DataView內(nèi)存。
encoding	string	否	編碼格式，默認(rèn)'utf-8'（目前僅支持'utf-8'）。

示例：


let arrayBuffer = new ArrayBuffer(2048);
let thatSer = new xml.XmlSerializer(arrayBuffer,"utf-8");
thatSer.setDeclaration();
let result = '<?xml version="1.0" encoding="utf-8"?>';
let view = new Uint8Array(arrayBuffer);
let view1 = "";
for (let i = 0; i < result.length; ++i) {
    view1 = view1 + String.fromCodePoint(view[i]);
}
console.log(view1) // <?xml version="1.0" encoding="utf-8"?>

setAttributes

setAttributes(name: string, value: string): void

設(shè)置Attributes方法。

系統(tǒng)能力： SystemCapability.Utils.Lang

參數(shù)：

參數(shù)名	類型	必填	說明
name	string	是	屬性的key值。
value	string	是	屬性的value值。

示例：


const myMAX = 2048;
let arrayBuffer = new ArrayBuffer(myMAX);
let thatSer = new xml.XmlSerializer(arrayBuffer);
thatSer.startElement("note");
thatSer.setAttributes("importance1", "high1");
thatSer.endElement();
let result = '<note importance1="high1"/>';
let view = new Uint8Array(arrayBuffer);
let view1 = "";
for (let i = 0; i < result.length; ++i) {
    view1 = view1 + String.fromCodePoint(view[i]);
}
console.log(view1) // <note importance1="high1"/>

addEmptyElement

addEmptyElement(name: string): void

寫入一個空元素。

系統(tǒng)能力： SystemCapability.Utils.Lang

參數(shù)：

參數(shù)名	類型	必填	說明
name	string	是	該空元素的元素名。

示例：


const myMAX = 2048;
let arrayBuffer = new ArrayBuffer(myMAX);
let thatSer = new xml.XmlSerializer(arrayBuffer);
thatSer.addEmptyElement("d");
let result = '<d/>';
let view = new Uint8Array(arrayBuffer);
let view1 = "";
for (let i = 0; i < result.length; ++i) {
    view1 = view1 + String.fromCodePoint(view[i]);
}
console.log(view1) // <d/>

setDeclaration

setDeclaration(): void

設(shè)置Declaration方法。

系統(tǒng)能力： SystemCapability.Utils.Lang

示例：


const myMAX = 2048;
let arrayBuffer = new ArrayBuffer(myMAX);
let thatSer = new xml.XmlSerializer(arrayBuffer);
thatSer.setDeclaration();
thatSer.setNamespace("h", "http://www.w3.org/TR/html4/");
thatSer.startElement("note");
thatSer.endElement();
let result = '<?xml version="1.0" encoding="utf-8"?>\r\n<h:note xmlns:h="http://www.w3.org/TR/html4/"/>';
let view = new Uint8Array(arrayBuffer);
let view1 = "";
for (let i = 0; i < result.length; ++i) {
    view1 = view1 + String.fromCodePoint(view[i]);
}
console.log(view1) 
// <?xml version="1.0" encoding="utf-8"?>
// <h:note xmlns:h="http://www.w3.org/TR/html4/"/>

startElement

startElement(name: string): void

根據(jù)給定名稱寫入元素開始標(biāo)記。

系統(tǒng)能力： SystemCapability.Utils.Lang

參數(shù)：

參數(shù)名	類型	必填	說明
name	string	是	當(dāng)前元素的元素名。

示例：


const myMAX = 2048;
let arrayBuffer = new ArrayBuffer(myMAX);
let thatSer = new xml.XmlSerializer(arrayBuffer);
thatSer.setDeclaration();
thatSer.setNamespace("h", "http://www.w3.org/TR/html4/");
thatSer.startElement("note");
thatSer.endElement();
let result = '<?xml version="1.0" encoding="utf-8"?>\r\n<h:note xmlns:h="http://www.w3.org/TR/html4/"/>';
let view = new Uint8Array(arrayBuffer);
let view1 = "";
for (let i = 0; i < result.length; ++i) {
    view1 = view1 + String.fromCodePoint(view[i]);
}
console.log(JSON.stringify(view1)) // <?xml version="1.0" encoding="utf-8"?>\r\n<h:note xmlns:h="http://www.w3.org/TR/html4/"/>

endElement

endElement(): void

寫入元素結(jié)束標(biāo)記。

系統(tǒng)能力： SystemCapability.Utils.Lang

示例：


const myMAX = 2048;
let arrayBuffer = new ArrayBuffer(myMAX);
let thatSer = new xml.XmlSerializer(arrayBuffer);
thatSer.setDeclaration();
thatSer.setNamespace("h", "http://www.w3.org/TR/html4/");
thatSer.startElement("note");
thatSer.endElement();
let result = '<?xml version="1.0" encoding="utf-8"?>\r\n<h:note xmlns:h="http://www.w3.org/TR/html4/"/>';
let view = new Uint8Array(arrayBuffer);
let view1 = "";
for (let i = 0; i < result.length; ++i) {
    view1 = view1 + String.fromCodePoint(view[i]);
}
console.log(JSON.stringify(view1)) // <?xml version="1.0" encoding="utf-8"?>\r\n<h:note xmlns:h="http://www.w3.org/TR/html4/"/>

setNamespace

setNamespace(prefix: string, namespace: string): void

寫入當(dāng)前元素標(biāo)記的命名空間。

系統(tǒng)能力： SystemCapability.Utils.Lang

參數(shù)：

參數(shù)名	類型	必填	說明
prefix	string	是	當(dāng)前元素及其子元素的前綴。
namespace	string	是	當(dāng)前元素及其子元素的命名空間。

示例：


const myMAX = 2048;
let arrayBuffer = new ArrayBuffer(myMAX);
let thatSer = new xml.XmlSerializer(arrayBuffer);
thatSer.setDeclaration();
thatSer.setNamespace("h", "http://www.w3.org/TR/html4/");
thatSer.startElement("note");
thatSer.endElement();
let result = '<?xml version="1.0" encoding="utf-8"?>\r\n<h:note xmlns:h="http://www.w3.org/TR/html4/"/>';
let view = new Uint8Array(arrayBuffer);
let view1 = "";
for (let i = 0; i < result.length; ++i) {
    view1 = view1 + String.fromCodePoint(view[i]);
}
console.log(JSON.stringify(view1)) // <?xml version="1.0" encoding="utf-8"?>\r\n<h:note xmlns:h="http://www.w3.org/TR/html4/"/>

setComment

setComment(text: string): void

寫入comment屬性。

系統(tǒng)能力： SystemCapability.Utils.Lang

參數(shù)：

參數(shù)名	類型	必填	說明
text	string	是	當(dāng)前元素的注釋內(nèi)容。

示例：


const myMAX = 2048;
let arrayBuffer = new ArrayBuffer(myMAX);
let thatSer = new xml.XmlSerializer(arrayBuffer);
thatSer.setComment("Hello, World!");
let result = '<!--Hello, World!-->';
let view = new Uint8Array(arrayBuffer);
let view1 = "";
for (let i = 0; i < result.length; ++i) {
    view1 = view1 + String.fromCodePoint(view[i]);
}
console.log(view1) // <!--Hello, World!-->

setCDATA

setCDATA(text: string): void

寫入CDATA屬性。

系統(tǒng)能力： SystemCapability.Utils.Lang

參數(shù)：

參數(shù)名	類型	必填	說明
text	string	是	CDATA屬性的內(nèi)容。

示例：


const myMAX = 2048;
let arrayBuffer = new ArrayBuffer(myMAX);
let thatSer = new xml.XmlSerializer(arrayBuffer);
thatSer.setCDATA('root SYSTEM')
let result = '<![CDATA[root SYSTEM]]>';
let view = new Uint8Array(arrayBuffer);
let view1 = "";
for (let i = 0; i < result.length; ++i) {
    view1 = view1 + String.fromCodePoint(view[i]);
}
console.log(view1) // <![CDATA[root SYSTEM]]>

setText

setText(text: string): void

設(shè)置Text方法。

系統(tǒng)能力： SystemCapability.Utils.Lang

參數(shù)：

參數(shù)名	類型	必填	說明
text	string	是	text屬性的內(nèi)容。

示例：


const myMAX = 2048;
let arrayBuffer = new ArrayBuffer(myMAX);
let thatSer = new xml.XmlSerializer(arrayBuffer);
thatSer.startElement("note");
thatSer.setAttributes("importance", "high");
thatSer.setText("Happy1");
thatSer.endElement();
let result = '<note importance="high">Happy1</note>';
let view = new Uint8Array(arrayBuffer);
let view1 = "";
for (let i = 0; i < result.length; ++i) {
    view1 = view1 + String.fromCodePoint(view[i]);
}
console.log(view1) // <note importance="high">Happy1</note>

setDocType

setDocType(text: string): void

寫入DocType屬性。

系統(tǒng)能力： SystemCapability.Utils.Lang

參數(shù)：

參數(shù)名	類型	必填	說明
text	string	是	DocType屬性的內(nèi)容。

示例：


const myMAX = 2048;
let arrayBuffer = new ArrayBuffer(myMAX);
let thatSer = new xml.XmlSerializer(arrayBuffer);
thatSer.setDocType('root SYSTEM "http://www.test.org/test.dtd"');
let result = '<!DOCTYPE root SYSTEM "http://www.test.org/test.dtd">';
let view = new Uint8Array(arrayBuffer);
let view1 = "";
for (let i = 0; i < result.length; ++i) {
    view1 = view1 + String.fromCodePoint(view[i]);
}
console.log(view1) // <!DOCTYPE root SYSTEM "http://www.test.org/test.dtd">

XmlPullParser

XmlPullParser接口用于解析現(xiàn)有的XML文件。

contructor

constructor(buffer: ArrayBuffer | DataView, encoding?: string)

構(gòu)造并返回一個XmlPullParser對象。

系統(tǒng)能力： SystemCapability.Utils.Lang

參數(shù)：

參數(shù)名	類型	必填	說明
buffer	ArrayBuffer \| DataView	是	需要解析的xml文本信息。
encoding	string	否	編碼格式，默認(rèn)'utf-8'（目前僅支持'utf-8'）。

示例：


let strXml =
  '<?xml version="1.0" encoding="utf-8"?>' +
    '<!DOCTYPE note [\n<!ENTITY foo "baa">]>' +
    '<note importance="high" logged="true">' +
    '    <![CDATA[\r\nfuncrion matchwo(a,6)\r\n{\r\nreturn 1;\r\n}\r\n]]>' +
    '    <!--Hello, World!-->' +
    '    <company>John &amp; Hans</company>' +
    '    <title>Happy</title>' +
    '    <title>Happy</title>' +
    '    <lens>Work</lens>' +
    '    <lens>Play</lens>' +
    '    <?go there?>' +
    '    <a><b/></a>' +
    '    <h:table xmlns:h="http://www.w3.org/TR/html4/">' +
    '        <h:tr>' +
    '            <h:td>Apples</h:td>' +
    '            <h:td>Bananas</h:td>' +
    '        </h:tr>' +
    '    </h:table>' +
    '</note>';
let textEncoder = new util.TextEncoder();
let arrbuffer = textEncoder.encodeInto(strXml);
let that = new xml.XmlPullParser(arrbuffer.buffer, 'UTF-8');
let str1 = '';

function func1(name, value) {
  str1 += name + value;
  return true;
}

let options = { supportDoctype: true, ignoreNameSpace: true, tagValueCallbackFunction: func1 }
that.parse(options);
console.log(str1)
//  note [<!ENTITY foo "baa">]note    funcrion matchwo(a,6){return 1;}    Hello, World!    companyJohn amp;amp; Hanscompany    titleHappytitle    titleHappytitle    lensWorklens    lensPlaylens    go there    abba    h:table        h:tr            h:tdApplesh:td            h:tdBananash:td        h:tr    h:tablenote

parse

parse(option: ParseOptions): void

該接口用于解析xml。

系統(tǒng)能力： SystemCapability.Utils.Lang

參數(shù)：

參數(shù)名	類型	必填	說明
option	ParseOptions	是	用戶控制以及獲取解析信息的選項。

示例：


let strXml =
            '<?xml version="1.0" encoding="utf-8"?>' +
            '<note importance="high" logged="true">' +
            '    <title>Happy</title>' +
            '    <todo>Work</todo>' +
            '    <todo>Play</todo>' +
            '</note>';
let arrayBuffer = new ArrayBuffer(strXml.length);
let bufView = new Uint8Array(arrayBuffer);
let strLen = strXml.length;
for (let tmp = 0; tmp < strLen; ++tmp) {
    bufView[tmp] = strXml.charCodeAt(tmp);
}
let that = new xml.XmlPullParser(arrayBuffer);
let arrTag = {};
let str = "";
let i = 0;
function func(key, value){
    arrTag[i] = 'key:'+key+' value:'+ value.getDepth();
    str += arrTag[i];
    i++;
    return true; // Determines whether to continually parse, which is used to continue or terminate parsing.
}
let options = {supportDoctype:true, ignoreNameSpace:true, tokenValueCallbackFunction:func}
that.parse(options);
console.log(str);
// 輸出:
// key:0 value:0key:2 value:1key:10 value:1key:2 value:2key:4 value:2key:3 value:2key:10 value:1key:2 value:2key:4 value:2key:3 value:2key:10 value:1key:2 value:2key:4 value:2key:3 value:2key:3 value:1key:1 value:0
// 解析:
// key代表了當(dāng)前事件類型，value為當(dāng)前解析的深度。你可以根據(jù)EVENTTYPE來知道具體的解析事件。例如本示例結(jié)果key: value代表含義為:
// 0(START_DOCUMENT):0(起始深度為0), 2(START_TAG):1(解析到開始標(biāo)簽node, 對應(yīng)深度為1), 10(WHITESPACE):1(解析到空白標(biāo)簽空格, 對應(yīng)深度為1), 2(START_TAG):2(解析到開始標(biāo)簽title, 對應(yīng)深度為2), ...

ParseOptions

xml解析選項。

系統(tǒng)能力：以下各項對應(yīng)的系統(tǒng)能力均為SystemCapability.Utils.Lang

名稱	類型	必填	說明
supportDoctype	boolean	否	是否忽略Doctype , 默認(rèn)false。
ignoreNameSpace	boolean	否	是否忽略NameSpace，默認(rèn)false。
tagValueCallbackFunction	(name: string, value: string) => boolean	否	獲取tagValue回調(diào)函數(shù), 默認(rèn)null。
attributeValueCallbackFunction	(name: string, value: string) => boolean	否	獲取attributeValue回調(diào)函數(shù), 默認(rèn)null。
tokenValueCallbackFunction	(eventType: EventType, value: ParseInfo) => boolean	否	獲取tokenValue回調(diào)函數(shù), 默認(rèn)null。

ParseInfo

當(dāng)前xml解析信息。

getColumnNumber

getColumnNumber(): number

獲取當(dāng)前列號，從1開始。

系統(tǒng)能力： SystemCapability.Utils.Lang

返回值：

類型	說明
number	返回當(dāng)前列號。

示例：


let strXml =
            '<?xml version="1.0" encoding="utf-8"?>' +
            '<note importance="high" logged="true">' +
            '    <title>Happy</title>' +
            '    <todo>Work</todo>' +
            '    <todo>Play</todo>' +
            '</note>';
let arrayBuffer = new ArrayBuffer(strXml.length);
let bufView = new Uint8Array(arrayBuffer);
let strLen = strXml.length;
for (let tmp = 0; tmp < strLen; ++tmp) {
    bufView[tmp] = strXml.charCodeAt(tmp);
}
let that = new xml.XmlPullParser(arrayBuffer);
let arrTag = {};
let str = "";
let i = 0;
function func(key, value){
    arrTag[i] = 'key:'+key+' value:'+ value.getColumnNumber();
    str += arrTag[i];
    i++;
    return true; // Determines whether to continually parse, which is used to continue or terminate parsing.
}
let options = {supportDoctype:true, ignoreNameSpace:true, tokenValueCallbackFunction:func}
that.parse(options);
console.log(str);
// 輸出:
// key:0 value:1key:2 value:77key:10 value:81key:2 value:88key:4 value:93key:3 value:101key:10 value:105key:2 value:111key:4 value:115key:3 value:122key:10 value:126key:2 value:132key:4 value:136key:3 value:143key:3 value:150key:1 value:299

getDepth

getDepth(): number

獲取元素的當(dāng)前深度。

系統(tǒng)能力： SystemCapability.Utils.Lang

返回值：

類型	說明
number	返回元素的當(dāng)前深度。

示例：


let strXml =
            '<?xml version="1.0" encoding="utf-8"?>' +
            '<note importance="high" logged="true">' +
            '    <title>Happy</title>' +
            '    <todo>Work</todo>' +
            '    <todo>Play</todo>' +
            '</note>';
let arrayBuffer = new ArrayBuffer(strXml.length);
let bufView = new Uint8Array(arrayBuffer);
let strLen = strXml.length;
for (let tmp = 0; tmp < strLen; ++tmp) {
    bufView[tmp] = strXml.charCodeAt(tmp);
}
let that = new xml.XmlPullParser(arrayBuffer);
let arrTag = {};
let str = "";
let i = 0;
function func(key, value){
    arrTag[i] = 'key:'+key+' value:'+ value.getDepth();
    str += arrTag[i];
    i++;
    return true; // Determines whether to continually parse, which is used to continue or terminate parsing.
}
let options = {supportDoctype:true, ignoreNameSpace:true, tokenValueCallbackFunction:func}
that.parse(options);
console.log(str);
// 輸出:
// key:0 value:0key:2 value:1key:10 value:1key:2 value:2key:4 value:2key:3 value:2key:10 value:1key:2 value:2key:4 value:2key:3 value:2key:10 value:1key:2 value:2key:4 value:2key:3 value:2key:3 value:1key:1 value:0
// 解析:
// key代表了當(dāng)前事件類型，value為當(dāng)前解析的深度。你可以根據(jù)EVENTTYPE來知道具體的解析事件。例如本示例結(jié)果key: value代表含義為:
// 0(START_DOCUMENT):0(起始深度為0), 2(START_TAG):1(解析到開始標(biāo)簽node, 對應(yīng)深度為1), 10(WHITESPACE):1(解析到空白標(biāo)簽空格, 對應(yīng)深度為1), 2(START_TAG):2(解析到開始標(biāo)簽title, 對應(yīng)深度為2), ...

getLineNumber

getLineNumber(): number

獲取當(dāng)前行號，從1開始。

系統(tǒng)能力： SystemCapability.Utils.Lang

返回值：

類型	說明
number	返回當(dāng)前行號。

示例：


let strXml =
            '<?xml version="1.0" encoding="utf-8"?>' +
            '<note importance="high" logged="true">' +
            '    <title>Happy</title>' +
            '    <todo>Work</todo>' +
            '    <todo>Play</todo>' +
            '</note>';
let arrayBuffer = new ArrayBuffer(strXml.length);
let bufView = new Uint8Array(arrayBuffer);
let strLen = strXml.length;
for (let tmp = 0; tmp < strLen; ++tmp) {
    bufView[tmp] = strXml.charCodeAt(tmp);
}
let that = new xml.XmlPullParser(arrayBuffer);
let arrTag = {};
let str = "";
let i = 0;
function func(key, value){
    arrTag[i] = 'key:'+key+' value:'+ value.getLineNumber();
    str += arrTag[i];
    i++;
    return true; // Determines whether to continually parse, which is used to continue or terminate parsing.
}
let options = {supportDoctype:true, ignoreNameSpace:true, tokenValueCallbackFunction:func}
that.parse(options);
console.log(str);
// 輸出:
// key:0 value:1key:2 value:1key:10 value:1key:2 value:1key:4 value:1key:3 value:1key:10 value:1key:2 value:1key:4 value:1key:3 value:1key:10 value:1key:2 value:1key:4 value:1key:3 value:1key:3 value:1key:1 value:1

getName

getName(): string

獲取當(dāng)前元素名稱。

系統(tǒng)能力： SystemCapability.Utils.Lang

返回值：

類型	說明
string	返回當(dāng)前元素名稱。

示例：


let strXml =
            '<?xml version="1.0" encoding="utf-8"?>' +
            '<note importance="high" logged="true">' +
            '    <title>Happy</title>' +
            '    <todo>Work</todo>' +
            '    <todo>Play</todo>' +
            '</note>';
let arrayBuffer = new ArrayBuffer(strXml.length);
let bufView = new Uint8Array(arrayBuffer);
let strLen = strXml.length;
for (let tmp = 0; tmp < strLen; ++tmp) {
    bufView[tmp] = strXml.charCodeAt(tmp);
}
let that = new xml.XmlPullParser(arrayBuffer);
let arrTag = {};
let str = "";
let i = 0;
function func(key, value){
    arrTag[i] = 'key:'+key+' value:'+ value.getName();
    str += arrTag[i];
    i++;
    return true; // Determines whether to continually parse, which is used to continue or terminate parsing.
}
let options = {supportDoctype:true, ignoreNameSpace:true, tokenValueCallbackFunction:func}
that.parse(options);
console.log(str);
// 輸出:
// key:0 value:key:2 value:notekey:10 value:key:2 value:titlekey:4 value:key:3 value:titlekey:10 value:key:2 value:todokey:4 value:key:3 value:todokey:10 value:key:2 value:todokey:4 value:key:3 value:todokey:3 value:notekey:1 value:

getNamespace

getNamespace(): string

獲取當(dāng)前元素的命名空間。

系統(tǒng)能力： SystemCapability.Utils.Lang

返回值：

類型	說明
string	返回當(dāng)前元素的命名空間。

示例：


let strXml =
            '<?xml version="1.0" encoding="utf-8"?>' +
            '<note importance="high" logged="true">' +
            '    <title>Happy</title>' +
            '    <todo>Work</todo>' +
            '    <todo>Play</todo>' +
            '</note>';
let arrayBuffer = new ArrayBuffer(strXml.length);
let bufView = new Uint8Array(arrayBuffer);
let strLen = strXml.length;
for (let tmp = 0; tmp < strLen; ++tmp) {
    bufView[tmp] = strXml.charCodeAt(tmp);
}
let that = new xml.XmlPullParser(arrayBuffer);
let arrTag = {};
let str = "";
let i = 0;
function func(key, value){
    arrTag[i] = 'key:'+key+' value:'+ value.getNamespace();
    str += arrTag[i];
    i++;
    return true; // Determines whether to continually parse, which is used to continue or terminate parsing.
}
let options = {supportDoctype:true, ignoreNameSpace:true, tokenValueCallbackFunction:func}
that.parse(options);
console.log(str);
// 輸出:
// key:0 value:key:2 value:key:10 value:key:2 value:key:4 value:key:3 value:key:10 value:key:2 value:key:4 value:key:3 value:key:10 value:key:2 value:key:4 value:key:3 value:key:3 value:key:1 value:

getPrefix

getPrefix(): string

獲取當(dāng)前元素前綴。

系統(tǒng)能力： SystemCapability.Utils.Lang

返回值：

類型	說明
string	返回當(dāng)前元素前綴。

示例：


let strXml =
            '<?xml version="1.0" encoding="utf-8"?>' +
            '<note importance="high" logged="true">' +
            '    <title>Happy</title>' +
            '    <todo>Work</todo>' +
            '    <todo>Play</todo>' +
            '</note>';
let arrayBuffer = new ArrayBuffer(strXml.length);
let bufView = new Uint8Array(arrayBuffer);
let strLen = strXml.length;
for (let tmp = 0; tmp < strLen; ++tmp) {
    bufView[tmp] = strXml.charCodeAt(tmp);
}
let that = new xml.XmlPullParser(arrayBuffer);
let arrTag = {};
let str = "";
let i = 0;
function func(key, value){
    arrTag[i] = 'key:'+key+' value:'+ value.getPrefix();
    str += arrTag[i];
    i++;
    return true; // Determines whether to continually parse, which is used to continue or terminate parsing.
}
let options = {supportDoctype:true, ignoreNameSpace:true, tokenValueCallbackFunction:func}
that.parse(options);
console.log(str);
// 輸出:
// key:0 value:key:2 value:key:10 value:key:2 value:key:4 value:key:3 value:key:10 value:key:2 value:key:4 value:key:3 value:key:10 value:key:2 value:key:4 value:key:3 value:key:3 value:key:1 value:

getText

getText(): string

獲取當(dāng)前事件的文本內(nèi)容。

系統(tǒng)能力： SystemCapability.Utils.Lang

返回值：

類型	說明
string	返回當(dāng)前事件的文本內(nèi)容。

示例：


let strXml =
            '<?xml version="1.0" encoding="utf-8"?>' +
            '<note importance="high" logged="true">' +
            '    <title>Happy</title>' +
            '    <todo>Work</todo>' +
            '    <todo>Play</todo>' +
            '</note>';
let arrayBuffer = new ArrayBuffer(strXml.length);
let bufView = new Uint8Array(arrayBuffer);
let strLen = strXml.length;
for (let tmp = 0; tmp < strLen; ++tmp) {
    bufView[tmp] = strXml.charCodeAt(tmp);
}
let that = new xml.XmlPullParser(arrayBuffer);
let arrTag = {};
let str = "";
let i = 0;
function func(key, value){
    arrTag[i] = 'key:'+key+' value:'+ value.getText();
    str += arrTag[i];
    i++;
    return true; // Determines whether to continually parse, which is used to continue or terminate parsing.
}
let options = {supportDoctype:true, ignoreNameSpace:true, tokenValueCallbackFunction:func}
that.parse(options);
console.log(str);
// 輸出:
// key:0 value:key:2 value:key:10 value:    key:2 value:key:4 value:Happykey:3 value:key:10 value:    key:2 value:key:4 value:Workkey:3 value:key:10 value:    key:2 value:key:4 value:Playkey:3 value:key:3 value:key:1 value:

isEmptyElementTag

isEmptyElementTag(): boolean

判斷當(dāng)前元素是否為空元素。

系統(tǒng)能力： SystemCapability.Utils.Lang

返回值：

類型	說明
boolean	返回true，當(dāng)前元素為空元素。

示例：


let strXml =
            '<?xml version="1.0" encoding="utf-8"?>' +
            '<note importance="high" logged="true">' +
            '    <title>Happy</title>' +
            '    <todo>Work</todo>' +
            '    <todo>Play</todo>' +
            '</note>';
let arrayBuffer = new ArrayBuffer(strXml.length);
let bufView = new Uint8Array(arrayBuffer);
let strLen = strXml.length;
for (let tmp = 0; tmp < strLen; ++tmp) {
    bufView[tmp] = strXml.charCodeAt(tmp);
}
let that = new xml.XmlPullParser(arrayBuffer);
let arrTag = {};
let str = "";
let i = 0;
function func(key, value){
    arrTag[i] = 'key:'+key+' value:'+ value.isEmptyElementTag();
    str += arrTag[i];
    i++;
    return true; // Determines whether to continually parse, which is used to continue or terminate parsing.
}
let options = {supportDoctype:true, ignoreNameSpace:true, tokenValueCallbackFunction:func}
that.parse(options);
console.log(str);
// 輸出:
// key:0 value:falsekey:2 value:falsekey:10 value:falsekey:2 value:falsekey:4 value:falsekey:3 value:falsekey:10 value:falsekey:2 value:falsekey:4 value:falsekey:3 value:falsekey:10 value:falsekey:2 value:falsekey:4 value:falsekey:3 value:falsekey:3 value:falsekey:1 value:false

isWhitespace

isWhitespace(): boolean

判斷當(dāng)前文本事件是否僅包含空格字符。

系統(tǒng)能力： SystemCapability.Utils.Lang

返回值：

類型	說明
boolean	返回true，當(dāng)前文本事件僅包含空格字符。

示例：


let strXml =
            '<?xml version="1.0" encoding="utf-8"?>' +
            '<note importance="high" logged="true">' +
            '    <title>Happy</title>' +
            '    <todo>Work</todo>' +
            '    <todo>Play</todo>' +
            '</note>';
let arrayBuffer = new ArrayBuffer(strXml.length);
let bufView = new Uint8Array(arrayBuffer);
let strLen = strXml.length;
for (let tmp = 0; tmp < strLen; ++tmp) {
    bufView[tmp] = strXml.charCodeAt(tmp);
}
let that = new xml.XmlPullParser(arrayBuffer);
let arrTag = {};
let str = "";
let i = 0;
function func(key, value){
    arrTag[i] = 'key:'+key+' value:'+ value.isWhitespace();
    str += arrTag[i];
    i++;
    return true; // Determines whether to continually parse, which is used to continue or terminate parsing.
}
let options = {supportDoctype:true, ignoreNameSpace:true, tokenValueCallbackFunction:func}
that.parse(options);
console.log(str);
// 輸出:
// key:0 value:truekey:2 value:falsekey:10 value:truekey:2 value:truekey:4 value:falsekey:3 value:truekey:10 value:truekey:2 value:truekey:4 value:falsekey:3 value:truekey:10 value:truekey:2 value:truekey:4 value:falsekey:3 value:truekey:3 value:truekey:1 value:true

getAttributeCount

getAttributeCount(): number

獲取當(dāng)前開始標(biāo)記的屬性數(shù)。

系統(tǒng)能力： SystemCapability.Utils.Lang

返回值：

類型	說明
number	當(dāng)前開始標(biāo)記的屬性數(shù)。

示例：


let strXml =
            '<?xml version="1.0" encoding="utf-8"?>' +
            '<note importance="high" logged="true">' +
            '    <title>Happy</title>' +
            '    <todo>Work</todo>' +
            '    <todo>Play</todo>' +
            '</note>';
let arrayBuffer = new ArrayBuffer(strXml.length);
let bufView = new Uint8Array(arrayBuffer);
let strLen = strXml.length;
for (let tmp = 0; tmp < strLen; ++tmp) {
    bufView[tmp] = strXml.charCodeAt(tmp);
}
let that = new xml.XmlPullParser(arrayBuffer);
let arrTag = {};
let str = "";
let i = 0;
function func(key, value){
    arrTag[i] = 'key:'+key+' value:'+ value.getAttributeCount();
    str += arrTag[i];
    i++;
    return true; // Determines whether to continually parse, which is used to continue or terminate parsing.
}
let options = {supportDoctype:true, ignoreNameSpace:true, tokenValueCallbackFunction:func}
that.parse(options);
console.log(str);
// 輸出:
// key:0 value:0key:2 value:2key:10 value:0key:2 value:0key:4 value:0key:3 value:0key:10 value:0key:2 value:0key:4 value:0key:3 value:0key:10 value:0key:2 value:0key:4 value:0key:3 value:0key:3 value:0key:1 value:0

EventType

事件枚舉。

系統(tǒng)能力：以下各項對應(yīng)的系統(tǒng)能力均為SystemCapability.Utils.Lang

名稱	值	說明
START_DOCUMENT	0	啟動文件事件。
END_DOCUMENT	1	結(jié)束文件事件。
START_TAG	2	啟動標(biāo)簽事件。
END_TAG	3	結(jié)束標(biāo)簽事件。
TEXT	4	文本事件。
CDSECT	5	CDATA事件。
COMMENT	6	XML注釋事件。
DOCDECL	7	XML文檔類型聲明事件。
INSTRUCTION	8	XML處理指令聲明事件。
ENTITY_REFERENCE	9	實體引用事件。
WHITESPACE	10	空白事件。

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導(dǎo)入模塊

XmlSerializer

constructor

setAttributes

addEmptyElement

setDeclaration

startElement

endElement

setNamespace

setComment

setCDATA

setText

setDocType

XmlPullParser

contructor

parse

ParseOptions

ParseInfo

getColumnNumber

getDepth

getLineNumber

getName

getNamespace

getPrefix

getText

isEmptyElementTag

isWhitespace

getAttributeCount

EventType

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