java解析CSV文件

package cvs;

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class CvsAnalyse {
  private InputStreamReader fr = null;
  private BufferedReader br = null;
  public CvsAnalyse(String f) throws IOException {
   fr = new InputStreamReader(new FileInputStream(f));
  }

  /**
   * 解析csv文件 到一个list中 每个单元个为一个String类型记录，每一行为一个list。 再将所有的行放到一个总list中
   */
  public List<List<String>> readCSVFile() throws IOException {
   br = new BufferedReader(fr);
   String rec = null;// 一行
   String str;// 一个单元格
   List<List<String>> listFile = new ArrayList<List<String>>();
   try {
    // 读取一行
    while ((rec = br.readLine()) != null) {
     int index=0;
     Pattern pCells = Pattern
       .compile("(\"[^\"]*(\"{2})*[^\"]*\")*[^,]*,");
     Matcher mCells = pCells.matcher(rec);
     List<String> cells = new ArrayList<String>();// 每行记录一个list
     // 读取每个单元格
     while (mCells.find()) {
      str = mCells.group();
      str = str.replaceAll(
        "(?sm)\"?([^\"]*(\"{2})*[^\"]*)\"?.*,", "$1");
      str = str.replaceAll("(?sm)(\"(\"))", "$2");
      cells.add(str);
      index=mCells.end();
     }
     cells.add(rec.substring(index));
     listFile.add(cells);
    }
   } catch (Exception e) {
    e.printStackTrace();
   } finally {
    if (fr != null) {
     fr.close();
    }
    if (br != null) {
     br.close();
    }
   }
   return listFile;
  }

 
public static void main(String[] args) throws Throwable { 
 CvsAnalyse test = new CvsAnalyse("C:/Users/Lying/Desktop/test.csv"); 
       List<List<String>> csvList = test.readCSVFile();  
       for(List<String> s:csvList){
        for(String ss:s){
        
         System.out.println(ss.toString());
        
        }
       
       }
    } 

}