Oracle's VARCHAR2 (4000) can store 2000 characters or 4,000 English characters?

In general, using the Ps.setstring () method is not possible, because the Oracle driver will put a Chinese text in three bytes, plus JDBC itself on the word Fu limit to 2000, that is, 600 words, if the English characters can only to 2000, English in 2 bytes, But without the OCI driver, how can you insert 2000 characters through JDBC? Using PreparedStatement's Setcharacterstream method, reader reader = new StringReader (The long character you need to insert); Ps.setcharacterstream (1,reader, character length);     This allows you to insert 2000 Chinese characters into the table if you want to do it in hibernate? I didn't think of it! Do you have a CLOB type?   Reader reader = new StringReader (new String (chars)); PreparedStatement PS = conn.preparestatement ("INSERT into Tvar (value) VALUES (?)");
Ps.setcharacterstream (1,reader,chars.length);
Ps.executeupdate ();