android之csv导出

 import java.io.BufferedReader;
 import java.io.BufferedWriter;
 import java.io.File;
 import java.io.FileOutputStream;
 import java.io.FileReader;
 import java.io.IOException;
 import java.io.OutputStreamWriter;
 import java.util.ArrayList;
 import java.util.List;

 import android.os.Environment;
 /**
  * CSV操作(导出和导入)
  *
  */
 public class CSVUtil {
     public static void testExportCsv(){
         List<String> dataList=new ArrayList<String>();
         dataList.add("1,黄忠,男");
         dataList.add("2,汪倩,女");
         dataList.add("3,黄球,女");
         dataList.add("4,黄燕,女");
         String path=Environment.getExternalStorageDirectory().getPath()+"/students.csv";
         exportCsv(path, dataList);
     }
     /**
      * 导出
      *
      * @param file csv文件(路径+文件名)，csv文件不存在会自动创建
      * @param dataList 数据
      * @return
      */
     public static boolean exportCsv(String path, List<String> dataList){
         File file =new File(path);
         boolean isSucess=false;
         FileOutputStream out=null;
         OutputStreamWriter osw=null;
         BufferedWriter bw=null;
         try {
             out = new FileOutputStream(file);
             osw = new OutputStreamWriter(out);
             bw =new BufferedWriter(osw);
             if(dataList!=null && !dataList.isEmpty()){
                 for(String data : dataList){
                     bw.append(data).append("\r\n");
                 }
             }
             isSucess=true;
         } catch (Exception e) {
             isSucess=false;
         }finally{
             if(bw!=null){
                 try {
                     bw.close();
                     bw=null;
                 } catch (IOException e) {
                     e.printStackTrace();
                 }
             }
             if(osw!=null){
                 try {
                     osw.close();
                     osw=null;
                 } catch (IOException e) {
                     e.printStackTrace();
                 }
             }
             if(out!=null){
                 try {
                     out.close();
                     out=null;
                 } catch (IOException e) {
                     e.printStackTrace();
                 }
             }
         }
         return isSucess;
     }

     /**
      * 导入
      *
      * @param file csv文件(路径+文件)
      * @return
      */
     public static List<String> importCsv(File file){
         List<String> dataList=new ArrayList<String>();
         BufferedReader br=null;
         try {
             br = new BufferedReader(new FileReader(file));
             String line = "";
             while ((line = br.readLine()) != null) {
                 dataList.add(line);
             }
         }catch (Exception e) {
         }finally{
             if(br!=null){
                 try {
                     br.close();
                     br=null;
                 } catch (IOException e) {
                     e.printStackTrace();
                 }
             }
         }

         return dataList;
     }
 }