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60K int 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; else return 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 ""; } } }