XML轉(zhuǎn)換

注意事項

XML解析及轉(zhuǎn)換需要確保傳入的XML數(shù)據(jù)符合標(biāo)準(zhǔn)格式。

開發(fā)步驟

此處以XML轉(zhuǎn)為JavaScript對象后獲取其標(biāo)簽值為例，說明轉(zhuǎn)換效果。

1. 引入模塊。

   import convertxml from '@ohos.convertxml';

2. 輸入待轉(zhuǎn)換的XML，設(shè)置轉(zhuǎn)換選項。

   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 options = {
     // trim: false 轉(zhuǎn)換后是否刪除文本前后的空格，否
     // declarationKey: "_declaration" 轉(zhuǎn)換后文件聲明使用_declaration來標(biāo)識
     // instructionKey: "_instruction" 轉(zhuǎn)換后指令使用_instruction標(biāo)識
     // attributesKey: "_attributes" 轉(zhuǎn)換后屬性使用_attributes標(biāo)識
     // textKey: "_text" 轉(zhuǎn)換后標(biāo)簽值使用_text標(biāo)識
     // cdataKey: "_cdata" 轉(zhuǎn)換后未解析數(shù)據(jù)使用_cdata標(biāo)識
     // docTypeKey: "_doctype" 轉(zhuǎn)換后文檔類型使用_doctype標(biāo)識
     // commentKey: "_comment" 轉(zhuǎn)換后注釋使用_comment標(biāo)識
     // parentKey: "_parent" 轉(zhuǎn)換后父類使用_parent標(biāo)識
     // typeKey: "_type" 轉(zhuǎn)換后元素類型使用_type標(biāo)識
     // nameKey: "_name" 轉(zhuǎn)換后標(biāo)簽名稱使用_name標(biāo)識
     // elementsKey: "_elements" 轉(zhuǎn)換后元素使用_elements標(biāo)識
     trim: false,
     declarationKey: "_declaration",
     instructionKey: "_instruction",
     attributesKey: "_attributes",
     textKey: "_text",
     cdataKey: "_cdata",
     docTypeKey: "_doctype",
     commentKey: "_comment",
     parentKey: "_parent",
     typeKey: "_type",
     nameKey: "_name",
     elementsKey: "_elements"
   }

3. 調(diào)用轉(zhuǎn)換函數(shù)，打印結(jié)果。

   let conv = new convertxml.ConvertXML();
   let result = conv.convertToJSObject(xml, options);
   let strRes = JSON.stringify(result); // 將js對象轉(zhuǎn)換為json字符串，用于顯式輸出
   console.info(strRes);
   // 也可以直接處理轉(zhuǎn)換后的JS對象，獲取標(biāo)簽值
   let title = result['_elements'][0]['_elements'][0]['_elements'][0]['_text']; // 解析<title>標(biāo)簽對應(yīng)的值
   let todo = result['_elements'][0]['_elements'][1]['_elements'][0]['_text']; // 解析<todo>標(biāo)簽對應(yīng)的值
   let todo2 = result['_elements'][0]['_elements'][2]['_elements'][0]['_text']; // 解析<todo>標(biāo)簽對應(yīng)的值
   console.info(title); // Happy
   console.info(todo); // Work
   console.info(todo2); // Play

   輸出結(jié)果如下所示：

   strRes:
   {"_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"}]}]}]}
   title:Happy
   todo:Work
   todo2:Play