现在写一个100M的文件大概要4~5分钟

因为经常要写超过100万的数据，所以这速度略显不足，求大神看看，哪里还能优化，多线程的就先别说了，这个就是多线程中的一个线程

* @author liuhongtian
*
*/
public class ResultFileTools {

private static Logger log = Logger.getLogger(ResultFileTools.class);

/**
* 根据查询结果集生成结果文件内容
*
* @param rs
* 查询结果集
* @param fileFullName
* 结果文件名称（含路径）
* @param columnNames
* 查询字段名称
* @param properties
* 查询属性
* @return 成功或失败
*/
public static boolean writeFile(ResultSet rs, String fileFullName, String[] columnNames, String[] propertys) {
Handler baseHandler = new BaseHandler();
Handler calcHandler = new CalcHandler(baseHandler);
Handler specialHandler = new SpecialHandler(calcHandler);

File file = new File(fileFullName);

// 创建文件
try (BufferedWriter bos = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(file), "gbk"));) {
// file.createNewFile();

// 写入文件头
StringBuffer hBuffer = new StringBuffer();
for (String string : columnNames) {
hBuffer.append("\"" + string + "\",");
}
String cols = hBuffer.toString().substring(0, hBuffer.toString().length() - 1);
bos.write(cols);
bos.newLine();
bos.flush();

// 写入查询结果记录
try {
int i = 0 ;
while (rs.next()) {
StringBuffer buffer = new StringBuffer();

if(i!=0){
buffer.append("\n");
}
for (String property : propertys) {
String s = specialHandler.toHandle(property, rs);
buffer.append("\"" + s + "\",");
}
bos.write(buffer.toString().substring(0, buffer.toString().length()-1));
buffer = null;
i++;
}
} catch (SQLException e) {
log.error("result set process faild!", e);
return false;
} catch (IOException e) {
log.error("record write faild!", e);
return false;
}
} catch (IOException e1) {
log.error("open file faild!", e1);
return false;
}

return true;
}

}