CSV文件解析

实现功能：针对读取的CSV文档字符串进行Map格式输出

主要代码如下：

public class CSVPaser extends Parser {

   @Override
   public Map<String, String> parse(String inputStr) throws ParserException {

      return null;
   }

   public static void main(String[] args) {

      String inputStr = "alice, 22, 1992/03/05\n" + "bob, 33, 1981/11/21\n" + "cart, 40, 1974/07/13";
// 说明：改段代码主要针对单行记录的输入做相应的解析
//    String regex = ",";
//    String[] words = inputStr.split(regex);
//    Map<String, String> map = new HashMap<>();
//    int i;
//    for (i = 0; i < words.length; i++) {
//    String s = String.valueOf(i);
//       map.put(s, words[i]);
//    }
//    System.out.println(map);


//说明：该部分主要针对多条记录做相应的解析
      try {
         BufferedReader br = new BufferedReader(new InputStreamReader(new ByteArrayInputStream(inputStr.getBytes(Charset.forName("utf8"))), Charset.forName("utf8")));
         String line;
         while ( (line = br.readLine()) != null ) {
            StringTokenizer st = new StringTokenizer(line,",");
            List<String> list = new ArrayList<>();
            Map<Integer, String> map = new HashMap<>();
            while(st.hasMoreTokens()){
               list.add(st.nextToken());
            }
//             System.out.println("===="+list);
               for (int i = 0; i < list.size(); i++) {
                  map.put(i,list.get(i));
            }
            System.out.println(map);
         }
      } catch (IOException e) {
         e.printStackTrace();
      }
   }
}

//范例解析结果如下：
{0=alice, 1= 22, 2= 1992/03/05}
{0=bob, 1= 33, 2= 1981/11/21}
{0=cart, 1= 40, 2= 1974/07/13}