import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileReader; import java.io.FileWriter; import java.io.IOException; import java.io.InputStreamReader; public class csv{  public static void main(String[] args) throws IOException {   File outfile = new File("D://new_car.csv");//存储到新文件的路径   try {    InputStreamReader isr = new InputStreamReader(new FileInputStream("D://car.csv"));//待处理数据的文件路径    BufferedReader reader = new BufferedReader(isr);    BufferedWriter bw = new BufferedWriter(new FileWriter(outfile));    String line = null;    while((line=reader.readLine())!=null){                 String item[] = line.split(",");                 /*                 *信息处理块                 */                  bw.newLine();//新起一行                 bw.write(""+","+"");//写到新文件中             }    bw.close();   } catch (FileNotFoundException e) {    // TODO Auto-generated catch block    e.printStackTrace();   }     } }