我正在使用Javascript FileReader。我想读取FileReader的结果,然后将每条记录转换为JS对象。使用以下代码:
$("#csv").bind("change", function (event) {
var reader = new FileReader();
reader.onload = function (theFile) {
try {
var input = $.csv.toArrays(theFile.target.result);
alert("CSV loaded successfully");
alert(input);
}
catch (e) {
alert("CSV Parse error.");
return;
}
};
reader.readAsText(event.target.files[0]);
});
}
alert(input)
将整个csv文件显示为字符串。如何从此输入创建javascript对象或JSON字符串数组?换句话说,我假设我需要在第一行中读取属性集,然后此后的每条记录都将创建一个具有属性集的对象,并将每个对象插入到数组中。
例如,来自以下字符串:
姓名,年龄,性别
约翰20岁,男
我想创建一个对象为:
{ Name: "John", Age: 20, Gender: "Male" }
提前致谢!
使用RegEx
/[\w .]+(?=,?)/g
您可以按照您提到的格式从csv文件中提取数据(如果.csv文件的格式和数据不同,则需要更改RegEx)。
样本数据访问 给定格式
Name,Age,Gender
John,20,Male
Cristine ,34,FeMale
Kate Wilson,65, FeMale
Mike,45,Male
Peter,23,Male
Katty,11,FeMale
Sandy,78,Mal
码
var str = $('#regex_string').val();
var extractValidString = str.match(/[\w .]+(?=,?)/g)
var noOfCols = 3
//in your case it is name,age,gender so we need 3
var objFields = extractValidString.splice(0,noOfCols);
//extract columns - First Row
var arr = [];
while(extractValidString.length>0) {
var obj = {};
//extract remaining rows one by one
var row = extractValidString.splice(0,noOfCols)
for(var i=0;i<row.length;i++) {
//make an object and put each column and set its data
obj[objFields[i]] = row[i].trim()
}
//push row to an array
arr.push(obj)
}
console.log(arr);
//output
[Object, Object, Object, Object, Object, Object, Object]
0: Object
Age: "20"
Gender: "Male"
Name: "John"
1: Object
Age: "34"
Gender: "FeMale"
Name: "Cristine"
2: Object
Age: "65"
Gender: "FeMale"
Name: "Kate Wilson"
3: Object
Age: "45"
Gender: "Male"
Name: "Mike"
4: Object
Age: "23"
Gender: "Male"
Name: "Peter"
5: Object
Age: "11"
Gender: "FeMale"
Name: "Katty"
6: Object
Age: "78"
Gender: "Male"
Name: "Sandy"
length: 7
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