将Java代码导出为CSV并导入Excel 2013

Question

I export Java source code to a CSV file. Because Java code can contain a lot of normal separators, I used ´ as separator (is there a better one for Java?).

One of my exported data rows looks like this in the output file:

2.0´"if (x < 1) {
  System.out.println(x + x);
  if (x < 2) {
    System.out.println("xy");
  }
}"

But when I import this into excel, what happens is that the first System.out until the end of the actual row ( " ) will land in the second row. I also tried omitting the " in the second column.

The String generated by Java for the second column is

condStr = ((IfStatement) cond.getOriginalNode()).toString();

I think this is a problem of Excel, as my CSV file looks fine. What can I change to make it be imported properly in Excel (2013)?

Answer 1

You need \\r\\n at each end of line in the CSV file. Quotes inside the text should be escaped with double quotes. If you choose the semicolon as field separator, you can open the file directly with Excel (file extension *.csv should be bound to Excel).

Here is a small example:

import java.io.IOException;

public class CsvTest {

  /**
   * CSV quote 
   *  
   * @param fieldContent String to quote
   * @param sep Field separator
   * @param quote Text quote character
   * @param target Target (e.g. StringBuilder or Writer)
   * @throws IOException
   */
  private static void quote(CharSequence fieldContent, char sep, char quote, Appendable target) throws IOException {
    target.append(quote);

    // Escape the quoting character. 
    final int len = fieldContent.length();
    for(int i = 0; i < len; i++) {
      final char c = fieldContent.charAt(i);
      if(c == quote) {
        target.append(quote).append(quote);
      } else {
        target.append(c);
      }
    }

    target.append(quote);
  }

  public static void main(String[] args) throws IOException {
    final char sep = ';';
    final char quote = '"';
    final StringBuilder sb = new StringBuilder();

    quote("2.0", sep, quote, sb);
    sb.append(sep);
    quote("if (x < 1) {\r\n" + 
        "  System.out.println(x + x);\r\n" + 
        "  if (x < 2) {\r\n" + 
        "    System.out.println(\"xy\");\r\n" + 
        "  }\r\n" + 
        "}", sep, quote, sb);

    System.out.println(sb.toString());
  }
}

Resulting in

"2.0";"if (x < 1) {
  System.out.println(x + x);
  if (x < 2) {
    System.out.println(""xy"");
  }
}"