java clob-string转换工具

import java.io.Reader;
import java.sql.Clob;public class ClobTransfer {/*** 将String转成Clob ,静态方法* * @param str*            字段* @return clob对象，如果出现错误，返回 null*/public static Clob stringToClob(String str) {if (null == str)return null;else {try {java.sql.Clob c = new javax.sql.rowset.serial.SerialClob(str.toCharArray());return c;} catch (Exception e) {return null;}}}/*** 将Clob转成String ,静态方法* * @param clob*            字段* @return 内容字串，如果出现错误，返回 null*/public static String clobToString(Clob clob) {if (clob == null)return null;StringBuffer sb = new StringBuffer();Reader clobStream = null;try {clobStream = clob.getCharacterStream();char[] b = new char[60000];// 每次获取60Kint i = 0;while ((i = clobStream.read(b)) != -1) {sb.append(b, 0, i);}} catch (Exception ex) {sb = null;} finally {try {if (clobStream != null) {clobStream.close();}} catch (Exception e) {}}if (sb == null)return null;elsereturn sb.toString();}public static String clobToString(oracle.sql.CLOB clob){try{Reader inStream = clob.getCharacterStream();char[] c = new char[(int) clob.length()];inStream.read(c);String data = new String(c);inStream.close();return data;}catch(Exception e){e.printStackTrace();return "";}}
}