parsing - CSV parser in JAVA, double quotes in string (SuperCSV, OpenCSV) -


all day i've been searching how resolve probem , nothing... want write function, convert csv file collection of lists (of strings). here function:

public collection<? extends list<string>> parse() throws ioexception {     collection<list<string>> collectionoflists = new arraylist<list<string>>();     csvlistreader parser = new csvlistreader(files.newbufferedreader(pathtofile, standardcharsets.utf_8), csvpreference.excel_preference);      list<string> row;     while( (row = parser.read()) != null)         collectionoflists.add(row);      return collectionoflists; }  public static string tostring(collection<? extends list<string>> csv) {     stringbuilder builder = new stringbuilder();     for(list<string> l : csv) {         for(string s : l)             builder.append(s).append(',');         if(builder.length() > 0)             builder.setcharat(builder.length()-1,'\n');     }     return builder.tostring(); }

but e.g. input:

id, name, city, age 1,"bob",london,12

output tostring(parse()) is:

id, name, city, age 1,bob,london,12

instead of same input:/ can do, strings contain \" (quotes) ? please me.

you create own preference.

csvpreference excelpreference = new csvpreference.builder('\'', ',', "\n").build(); csvlistreader parser = new csvlistreader(files.newbufferedreader(pathtofile , standardcharsets.utf_8), excelpreference);

after that, output expected. in example, strip single quote if have in csv file , keep double quote untouched.


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