clob

String s1="1231dsdgasd的飒飒大";

Clob c = new SerialClob(s1.toCharArray());//String 转 clob
Blob b = new SerialBlob(s1.getBytes("GBK"));//String 转 blob
// 也可以这样不传字符集名称，默认使用系统的
// Blob b = new SerialBlob(s1.getBytes());

String clobString = c.getSubString(1, (int) c.length());//clob 转 String
String blobString = new String(b.getBytes(1, (int) b.length()),"GBK");//blob 转 String
// 前面若没传入字符集名称，则这里也不需要传入，以免出错
// String blobString = new String(b.getBytes(1, (int) b.length()));

System.out.println(clobString);
System.out.println(blobString);