OpenHarmony語言基礎(chǔ)類庫【@ohos.xml (xml解析與生成)】

將XML文本轉(zhuǎn)換為JavaScript對象、以及XML文件生成和解析的一系列接口。

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)：

鴻蒙開發(fā)指導(dǎo)文檔：gitee.com/li-shizhen-skin/harmony-os/blob/master/README.md點(diǎn)擊或者復(fù)制轉(zhuǎn)到。

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)：

示例：

const MY_MAX = 2048;
let arrayBuffer = new ArrayBuffer(MY_MAX);
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(gè)空元素。

系統(tǒng)能力： SystemCapability.Utils.Lang

參數(shù)：

示例：

const MY_MAX = 2048;
let arrayBuffer = new ArrayBuffer(MY_MAX);
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

編寫帶有編碼的文件聲明。

系統(tǒng)能力： SystemCapability.Utils.Lang

示例：

const MY_MAX = 2048;
let arrayBuffer = new ArrayBuffer(MY_MAX);
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"? >rn< 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)：

示例：

const MY_MAX = 2048;
let arrayBuffer = new ArrayBuffer(MY_MAX);
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"? >rn< 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"? >rn< 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 MY_MAX = 2048;
let arrayBuffer = new ArrayBuffer(MY_MAX);
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"? >rn< 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"? >rn< 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)：

示例：

const MY_MAX = 2048;
let arrayBuffer = new ArrayBuffer(MY_MAX);
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"? >rn< 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"? >rn< 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)：

示例：

const MY_MAX = 2048;
let arrayBuffer = new ArrayBuffer(MY_MAX);
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)：

示例：

const MY_MAX = 2048;
let arrayBuffer = new ArrayBuffer(MY_MAX);
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]] >

[](https://gitee.com/openharmony/docs/blob/OpenHarmony-3.2-Release/zh-cn/application-dev/reference/apis/js-apis-xml.md#settext)setText

setText(text: string): void

設(shè)置Text方法。

系統(tǒng)能力： SystemCapability.Utils.Lang

參數(shù)：

示例：

const MY_MAX = 2048;
let arrayBuffer = new ArrayBuffer(MY_MAX);
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)：

示例：

const MY_MAX = 2048;
let arrayBuffer = new ArrayBuffer(MY_MAX);
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。

constructor

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

構(gòu)造并返回一個(gè)XmlPullParser對象。

系統(tǒng)能力： SystemCapability.Utils.Lang

參數(shù)：

示例：

let strXml =
    '< ?xml version="1.0" encoding="utf-8"? >' +
    '< !DOCTYPE note [n< !ENTITY foo "baa" >] >' +
    '< note importance="high" logged="true" >' +
    '    < ![CDATA[rnfuncrion matchwo(a,6)rn{rnreturn 1;rn}rn]] >' +
    '    < !--Hello, World!-- >' +
    '    < company >John & 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)：

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 textEncoder = new util.TextEncoder();
let arrbuffer = textEncoder.encodeInto(strXml);
let that = new xml.XmlPullParser(arrbuffer.buffer);
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(xiàng)。

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

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：

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 textEncoder = new util.TextEncoder();
let arrbuffer = textEncoder.encodeInto(strXml);
let that = new xml.XmlPullParser(arrbuffer.buffer);
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：

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 textEncoder = new util.TextEncoder();
let arrbuffer = textEncoder.encodeInto(strXml);
let that = new xml.XmlPullParser(arrbuffer.buffer);
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：

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 textEncoder = new util.TextEncoder();
let arrbuffer = textEncoder.encodeInto(strXml);
let that = new xml.XmlPullParser(arrbuffer.buffer);
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：

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 textEncoder = new util.TextEncoder();
let arrbuffer = textEncoder.encodeInto(strXml);
let that = new xml.XmlPullParser(arrbuffer.buffer);
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：

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 textEncoder = new util.TextEncoder();
let arrbuffer = textEncoder.encodeInto(strXml);
let that = new xml.XmlPullParser(arrbuffer.buffer);
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：

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 textEncoder = new util.TextEncoder();
let arrbuffer = textEncoder.encodeInto(strXml);
let that = new xml.XmlPullParser(arrbuffer.buffer);
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：

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 textEncoder = new util.TextEncoder();
let arrbuffer = textEncoder.encodeInto(strXml);
let that = new xml.XmlPullParser(arrbuffer.buffer);
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：

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 textEncoder = new util.TextEncoder();
let arrbuffer = textEncoder.encodeInto(strXml);
let that = new xml.XmlPullParser(arrbuffer.buffer);
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：

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 textEncoder = new util.TextEncoder();
let arrbuffer = textEncoder.encodeInto(strXml);
let that = new xml.XmlPullParser(arrbuffer.buffer);
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：

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 textEncoder = new util.TextEncoder();
let arrbuffer = textEncoder.encodeInto(strXml);
let that = new xml.XmlPullParser(arrbuffer.buffer);
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(xiàng)對應(yīng)的系統(tǒng)能力均為SystemCapability.Utils.Lang

審核編輯 黃宇