android之csv导出

  1 import java.io.BufferedReader;
  2 import java.io.BufferedWriter;
  3 import java.io.File;
  4 import java.io.FileOutputStream;
  5 import java.io.FileReader;
  6 import java.io.IOException;
  7 import java.io.OutputStreamWriter;
  8 import java.util.ArrayList;
  9 import java.util.List;
 10 
 11 import android.os.Environment;
 12 /**   
 13  * CSV操作(导出和导入)
 14  *
 15  */
 16 public class CSVUtil {
 17     public static void testExportCsv(){
 18         List<String> dataList=new ArrayList<String>();
 19         dataList.add("1,黄忠,男");
 20         dataList.add("2,汪倩,女");
 21         dataList.add("3,黄球,女");
 22         dataList.add("4,黄燕,女");
 23         String path=Environment.getExternalStorageDirectory().getPath()+"/students.csv";
 24         exportCsv(path, dataList);
 25     }
 26     /**
 27      * 导出
 28      * 
 29      * @param file csv文件(路径+文件名)，csv文件不存在会自动创建
 30      * @param dataList 数据
 31      * @return
 32      */
 33     public static boolean exportCsv(String path, List<String> dataList){
 34         File file =new File(path);
 35         boolean isSucess=false;
 36         FileOutputStream out=null;
 37         OutputStreamWriter osw=null;
 38         BufferedWriter bw=null;
 39         try {
 40             out = new FileOutputStream(file);
 41             osw = new OutputStreamWriter(out);
 42             bw =new BufferedWriter(osw);
 43             if(dataList!=null && !dataList.isEmpty()){
 44                 for(String data : dataList){
 45                     bw.append(data).append("
");
 46                 }
 47             }
 48             isSucess=true;
 49         } catch (Exception e) {
 50             isSucess=false;
 51         }finally{
 52             if(bw!=null){
 53                 try {
 54                     bw.close();
 55                     bw=null;
 56                 } catch (IOException e) {
 57                     e.printStackTrace();
 58                 } 
 59             }
 60             if(osw!=null){
 61                 try {
 62                     osw.close();
 63                     osw=null;
 64                 } catch (IOException e) {
 65                     e.printStackTrace();
 66                 } 
 67             }
 68             if(out!=null){
 69                 try {
 70                     out.close();
 71                     out=null;
 72                 } catch (IOException e) {
 73                     e.printStackTrace();
 74                 } 
 75             }
 76         }
 77         return isSucess;
 78     }
 79     
 80     /**
 81      * 导入
 82      * 
 83      * @param file csv文件(路径+文件)
 84      * @return
 85      */
 86     public static List<String> importCsv(File file){
 87         List<String> dataList=new ArrayList<String>();
 88         BufferedReader br=null;
 89         try { 
 90             br = new BufferedReader(new FileReader(file));
 91             String line = ""; 
 92             while ((line = br.readLine()) != null) { 
 93                 dataList.add(line);
 94             }
 95         }catch (Exception e) {
 96         }finally{
 97             if(br!=null){
 98                 try {
 99                     br.close();
100                     br=null;
101                 } catch (IOException e) {
102                     e.printStackTrace();
103                 }
104             }
105         }
106  
107         return dataList;
108     }
109 }