将Java中的字符串导出为CSV

Question

How to export a string in Java to a csv file having this format using only one column.

This is what i am expecting:

                Column 1    
Row 1:     string1,string2,string3  
Row 2:     string4, string5, string6

Thanks in advance

Answer 1

In the code below you provide a List of elements. Each element contains the info for one line of the csv file. The StringBuilder is used to create the String for one line, which then is output at once to the file.

public void writeCsvFile(List elements, String fileName) throws IOException {    
     BufferedWriter csvFile = null;
     String delim = ",";
     try {
             csvFile = new BufferedWriter(new OutputStreamWriter(
                        new FileOutputStream(fileName), StandardCharsets.UTF_8));
             for (int i = 0; i < objects.size(); i++) {
                 StringBuilder buf = new StringBuilder();
                 Elements elem = elements.get(i);
                 buf.append(elem.info1).append(delim);
                 buf.append(elem.info2).append(delim);
                 buf.append(elem.info3);
                 csvFile.write(buf.toString());
                 csvFile.newLine();
            }
        } finally {
            try {
                if (csvFile != null) {
                    csvFile.close();
                }
            } catch (IOException e) {
                // empty
            }
        }

    }

Answer 2

You essentially have to "escape" the commas so the CSV reader won't interrpret them as columns delimiters.

If you wrap your row values in quotes then the commas should be ignored as delimeters

This will give you 3 columns

Value1,Value2,Value3

This should give you 1 column with the entire string as a single value

"Value1,Value2,Value3"