java Clob类型的字段转化为String类型的字段

/**
* 将Clob类型的字段转化为String类型的字段
* @param clob  Clob类型的字段
* @return String
*/
public static  String ClobToString(Clob clob){
String reString = "";
try{
Reader is = clob.getCharacterStream();// 得到流
BufferedReader br = new BufferedReader(is);
String s = br.readLine();
StringBuffer sb = new StringBuffer();
while (s != null) {// 执行循环将字符串全部取出付值给StringBuffer由StringBuffer转成STRING
sb.append(s);
s = br.readLine();
}
reString = sb.toString();
}catch( Exception e){
e.printStackTrace();
}
return reString;
}