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("
");
                }
            }
            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;
    }
}