Java避免UTF-8的csv文件打开中文出现乱码的方法

import java.io.*;
/**
 * Created by zhaozhi on 15-5-29.
 */
public class TestCSV {
  public static String join(String[] strArr, String delim) {
    StringBuilder sb = new StringBuilder();
    for(String s : strArr) {
      sb.append(s);
      sb.append(delim);
    }
    String ret;
    if (strArr.length > 1) {
      ret = sb.substring(0, sb.length()-1);
    }
    else {
      ret = sb.toString();
    }
    return ret;
  }
  public static void main (String[] args) throws Exception {
    String[] heads = {"日期", "产品", "订单数"};
    String[][] rows = {
        {"20150228", "安卓", "23"},
        {"20150301", "web", "34"}
    };
    byte[] bom = {(byte)0xFF, (byte)0xFE};
    String fname = "d:\\utf-16le.csv";
    BufferedOutputStream bo = new BufferedOutputStream(new FileOutputStream(fname));
    bo.write(bom);
    bo.write(join(heads, "\t").getBytes("utf-16le"));
    bo.write("\n".getBytes("utf-16le"));
    for (String[] row : rows) {
      bo.write(join(row, "\t").getBytes("utf-16le"));
      bo.write("\n".getBytes("utf-16le"));
    }
    bo.close();
    UTF8();
  }
  public static void UTF8() throws IOException {
    String line = "中文,标题,23";
    OutputStream os = new FileOutputStream("d:/utf-8.csv");
    os.write(239);  // 0xEF
    os.write(187);  // 0xBB
    os.write(191);  // 0xBF
    PrintWriter w = new PrintWriter(new OutputStreamWriter(os, "UTF-8"));
    w.print(line);
    w.flush();
    w.close();
  }
}