Come si converte un oggetto in CSV usando JavaScript?

Question

Voglio convertire questo oggetto in file CSV. I nomi delle colonne dovrebbero essere chiavi, questo è un piccolo frammento di array. E l'ultimo array sarà solo uno di tipo (chiavi), tutti gli altri array avranno le stesse chiavi ma valori diversi.

[{ 
Comment: "Good", 
Experince Months: "4", 
Experince Years: "4", 
Score: "3", 
Subject: "CPP", 
Topic: "Scripting (mention details)" 
}, 
{ 
Comment: "Excilent", 
Experince Months: "6", 
Experince Years: "6", 
Score: "6", 
Subject: "CSharp", 
Topic: "WPF" 
}, 
{ 
Anything else worth highlighting: "Web Specialist", 
Result: "Selected", 
Total Business Analysis Experience: false, 
Total Project Management Experience: false, 
Total Score: 75, 
Total Server Side Development Experience: true, 
Total Server Side Support Experience: true, 
Total UI Development Experience: true, 
Total UI Support Experience: true 
}] 

Answer 1

Questa è una semplice implementazione:

// Returns a csv from an array of objects with 
// values separated by tabs and rows separated by newlines 
function CSV(array) { 
    // Use first element to choose the keys and the order 
    var keys = Object.keys(array[0]); 

    // Build header 
    var result = keys.join("\t") + "\n"; 

    // Add the rows 
    array.forEach(function(obj){ 
     keys.forEach(function(k, ix){ 
      if (ix) result += "\t"; 
      result += obj[k]; 
     }); 
     result += "\n"; 
    }); 

    return result; 
} 

Answer 2

JSON al CSV Converter

function ConvertToCSV(objArray) { 
     var array = typeof objArray != 'object' ? JSON.parse(objArray) : objArray; 
     var str = ''; 

     for (var i = 0; i < array.length; i++) { 
      var line = ''; 
      for (var index in array[i]) { 
       if (line != '') line += ',' 

       line += array[i][index]; 
      } 

      str += line + '\r\n'; 
     } 

     return str; 
    } 

Answer 3

Anha !! in realtà ho uno PHP Class che funziona piuttosto bene con same json object key (si sta utilizzando diffrent json key nel terzo set). Quindi, se lo desideri, puoi modificare il mio PHP Export Class come vuoi (per chiave di oggetto diversa). Qui ho intenzione di spiegare un esempio e di condividere la mia lezione con te. La speranza, dopo modificare questa classe il vostro desiderio si avvera :)

PHP Export Class [Class.Export.php]

<?php 
/** 
* Class Export 
* 
* Send JSON data and make an array to save as Excel file 
* 
* @author neeraj.singh 
* @version 1.0 
* 
*/ 

// Class Start Here 
class Export { 

    /** 
    * Set Excel file name 
    * 
    * @var string 
    */ 
    public $filename = 'excel-doc'; 

    /** 
    * Set Excel field title 
    * 
    * @var string 
    */ 
    public $custom_titles; 

    /** 
    * Get JSON data and convert in Excel file 
    */ 
    public function saveAsExcel() { 
     $CSV = trim ($_POST ['exportdata']); 
     if (function_exists ('json_decode')) { 
      $data = json_decode ($CSV, true); 
      if (count ($data) > 0) { 
       // call excel export 
       $this->_createExcelByArray ($data); 
      } else { 
       die ("Sorry!! array not build."); 
      } 
     } else { 
      die ("Sorry!! json_decode not working on this server."); 
     } 
    } 

    /** 
    * Take an array and create 
    * Excel file 
    * 
    * @param array $dataArray   
    */ 
    private function _createExcelByArray($dataArray) { 
     // set excel file name 
     $this->filename = 'DEMO-Excel' . '-' . date ('d-m-Y-H-s'); 
     // get array field by first element of array 
     foreach ($dataArray [0] as $k => $v) { 
      $field [] = $k; 
     } 
     // get total no of field in array 
     $totalFields = count ($field); 
     $i = $j = 0; 
     // get array values 
     foreach ($dataArray as $v) { 
      for($j; $j < $totalFields; $j ++) { 
       $value [$i] [] = $v [$field [$j]]; 
      } 
      $i ++; 
      $j = 0; 
     } 
     $this->initExcel ($field, $value); 
    } 

    /** 
    * Creating an Excel file with array data 
    * 
    * @param array $titles   
    * @param array $array   
    */ 
    public function initExcel($titles, $array) { 
     $data = NULL; 
     if (! is_array ($array)) { 
      die ('The data supplied is not a valid array'); 
     } else { 
      $headers = $this->titles ($titles); 
      if (is_array ($array)) { 
       foreach ($array as $row) { 
        $line = ''; 
        foreach ($row as $value) { 
         if (! isset ($value) or $value == '') { 
          $value = "\t"; 
         } else { 
          $value = str_replace ('"', '""', $value); 
          $value = '"' . $value . '"' . "\t"; 
         } 
         $line .= $value; 
        } 
        $data .= iconv ("UTF-8", "GB18030//IGNORE", trim ($line)) . "\n"; 
       } 
       $data = str_replace ("\r", "", $data); 
       $this->generate ($headers, $data); 
      } 
     } 
    } 

    /** 
    * Create excel header and 
    * write data into file 
    * 
    * @param string $headers   
    * @param string $data   
    */ 
    private function generate($headers, $data) { 
     $this->set_headers(); 
     echo "$headers\n$data"; 
    } 

    /** 
    * Set Excel file field header 
    * 
    * @param array $titles   
    * @return string 
    */ 
    public function titles($titles) { 
     if (is_array ($titles)) { 
      $headers = array(); 
      if (is_null ($this->custom_titles)) { 
       if (is_array ($titles)) { 
        foreach ($titles as $title) { 
         $headers [] = iconv ("UTF-8", "GB18030//IGNORE", $title); 
        } 
       } else { 
        foreach ($titles as $title) { 
         $headers [] = iconv ("UTF-8", "GB18030//IGNORE", $title->name); 
        } 
       } 
      } else { 
       $keys = array(); 
       foreach ($titles as $title) { 
        $keys [] = iconv ("UTF-8", "GB18030//IGNORE", $title->name); 
       } 
       foreach ($keys as $key) { 
        $headers [] = iconv ("UTF-8", "GB18030//IGNORE", $this->custom_titles [array_search ($key, $keys)]); 
       } 
      } 
      return implode ("\t", $headers); 
     } 
    } 

    /** 
    * Set Response Header 
    */ 
    private function set_headers() { 
     $ua = $_SERVER ["HTTP_USER_AGENT"]; 
     $filename = $this->filename . ".xls"; 
     $encoded_filename = urlencode ($filename); 
     $encoded_filename = str_replace ("+", "%20", $encoded_filename); 
     header ("Pragma: public"); 
     header ("Expires: 0"); 
     header ("Cache-Control: must-revalidate, post-check=0, pre-check=0"); 
     header ("Content-Type: application/vnd.ms-excel; charset=UTF-8"); 
     header ("Content-Type: application/force-download"); 
     header ("Content-Type: application/octet-stream"); 
     header ("Content-Type: application/download"); 
     if (preg_match ("/MSIE/", $ua)) { 
      header ('Content-Disposition: attachment; filename="' . $encoded_filename . '"'); 
     } else if (preg_match ("/Firefox/", $ua)) { 
      header ('Content-Disposition: attachment; filename*="utf8\'\'' . $filename . '"'); 
     } else { 
      header ('Content-Disposition: attachment; filename="' . $filename . '"'); 
     } 
     header ("Content-Transfer-Encoding: binary"); 
    } 
} 
// Class End Here 

Va bene, qui è HTML e PHP Code per dimostrare come funziona.

HTML Code:

<!doctype html> 
<html lang="en"> 
<head> 
    <meta charset="UTF-8"> 
    <title>JSON to Excel POC</title>  
    <script type="text/javascript"> 
    <!--  
    function excelExport() { 
     // this is your json data as string or you can 
     // use as object too 
     var jsonObject = '[{ "Comment" : "Good", "ExperinceMonths" : "4", "ExperinceYears" : "4", "Score" : "3", "Subject" : "CPP", "Topic" : "Scripting (mention details)" }, { "Comment" : "Excilent", "ExperinceMonths" : "6", "ExperinceYears" : "6", "Score" : "6", "Subject" : "CSharp", "Topic" : "WPF" }]';  
     // create a form 
     var form   = document.createElement('FORM'); 
     form.name   = 'exportform'; 
     form.id    = 'exportform'; 
     form.method   = 'POST'; 
     form.action   = './export.php'; 
     // create a hidden input inside form 
     var hiddenInput   = document.createElement('INPUT'); 
     hiddenInput.type = 'HIDDEN'; 
     hiddenInput.name = 'exportdata'; 
     hiddenInput.id  = 'exportdata'; 
     hiddenInput.value = jsonObject; 
     // insert hidden element inside form 
     form.appendChild(hiddenInput); 
     // insert form inside body 
     document.body.appendChild(form); 
     // submit the form 
     form.submit(); 
     // remoce the form 
     document.body.removeChild(form); 
     return true; 
    } 
    //--> 
    </script> 
    </head> 
<body> 
    <input type="button" value="Export" onClick='excelExport(); return false;'> 
</body> 
</html> 

e infine Ecco

PHP Code [export.php]

<?php 
// add Class Export File 
require_once 'Class.Export.php'; 
// make a new onject of Class Export 
$export = new Export(); 
// Send POSt data to make 
// Excel File 
if(isset($_POST['exportdata'])){ 
    $export->saveAsExcel(); 
} 
?> 

Speranza, questo pezzo di codice aiuterà le persone Perché, condivisione è sempre cura :) Acclamazioni !!