opencsv writing file with some quoted elements and others unquoted

问题

Does anyone have experience using opencsv in Java to write a csv file where only some of the elements need to be double quoted? The desired output I am looking to test is to make a file that would read:

1,"two",three

but when I try the following code

writer = new CSVWriter(new FileWriter("yourfile.csv"), ',',CSVWriter.NO_QUOTE_CHARACTER);
String[] entries = {"1","\"two\"","three"};
writer.writeNext(entries);
writer.close();

the following output occurs

1,""two"",three

Thoughts?

回答1:

These extra quotes are the escape characters used by OpenCSV. You need to use the overloaded constructor that allows you to turn off these:

writer = new CSVWriter(new FileWriter("yourfile.csv"), ',', 
           CSVWriter.NO_QUOTE_CHARACTER, CSVWriter.NO_ESCAPE_CHARACTER);
...

Output:

1,"two",three

来源：https://stackoverflow.com/questions/14531827/opencsv-writing-file-with-some-quoted-elements-and-others-unquoted