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javascript 读取csv文件
js读取CSV格式数据，参考如下：
script type="text/javascript"
// This will parse a delimited string into an array of
// arrays. The default delimiter is the comma, but this
// can be overriden in the second argument.
function CSVToArray( strData, strDelimiter ){
// Check to see if the delimiter is defined. If not,
// then default to comma.
strDelimiter = (strDelimiter || ",");
// Create a regular expression to parse the CSV values.
var objPattern = new RegExp(
(
// Delimiters.
"(\\" + strDelimiter + "|\\r?\\n|\\r|^)" +
// Quoted fields.
"(?:\"([^\"]*(?:\"\"[^\"]*)*)\"|" +
// Standard fields.
"([^\"\\" + strDelimiter + "\\r\\n]*))"
),
"gi"
);
// Create an array to hold our data. Give the array
// a default empty first row.
var arrData = [[]];
// Create an array to hold our individual pattern
// matching groups.
var arrMatches = null;
// Keep looping over the regular expression matches
// until we can no longer find a match.
while (arrMatches = objPattern.exec( strData )){
// Get the delimiter that was found.
var strMatchedDelimiter = arrMatches[ 1 ];
// Check to see if the given delimiter has a length
// (is not the start of string) and if it matches
// field delimiter. If id does not, then we know
// that this delimiter is a row delimiter.
if (
strMatchedDelimiter.length
(strMatchedDelimiter != strDelimiter)
){
// Since we have reached a new row of data,
// add an empty row to our data array.
arrData.push( [] );
}
// Now that we have our delimiter out of the way,
// let's check to see which kind of value we
// captured (quoted or unquoted).
if (arrMatches[ 2 ]){
// We found a quoted value. When we capture
// this value, unescape any double quotes.
var strMatchedValue = arrMatches[ 2 ].replace(
new RegExp( "\"\"", "g" ),
"\""
);
} else {
// We found a non-quoted value.
var strMatchedValue = arrMatches[ 3 ];
}
// Now that we have our value string, let's add
// it to the data array.
arrData[ arrData.length - 1 ].push( strMatchedValue );
}
// Return the parsed data.
return( arrData );
}
/script
csvread如何使用
csvread函数与stringfromfile函数类似，都是从外部读取参数，不同的是csv可以从一个文件中读取多个参数。
下面具体讲一下如何使用csvread函数：
1.首先是外部文件的格式，要求是csv格式，每个参数间用逗号相隔。每行表示每一组参数，每列表示每种参数。
2. csvread与stringfromfile函数在jmeter中的使用上是一样的。他的格式是：＿＿csvread(外部文件，参数列）。
例子：＿＿csvread(data.csv,0)，就是从data.csv文件中读取第一列的参数。以此类推。
注意：csvread函数只试用与用逗号分隔的纯数字文件。
第一种：M = CSVREAD(‘FILENAME’），直接读取csv文件的数据，并返回给M。
第二种：M = CSVREAD(‘FILENAME’，R,C)，读取csv文件中从第R-1行，第C-1列的数据开始的数据，这对带有头文件说明的csv文件（如示波器等采集的文件）的读取是很重要的。
JavaScript 如何读取数据库CSV文件，然后再Cesium中运用其中两列
兼容性好点就发送内容到服务器，又服务器处理，设置"Content-Disposition
