[ORACLE]如何新增 BLOB/CLOB ？

CREATE TABLE article(
subject VARCHAR2(50 char),
content CLOB ,
tstamp TIMESTAMP DEFAULT SYSDATE
);

--使用EMPTY_CLOB()来初始化CLOB字段
String strSql = "INSERT INTO article(subject,content) VALUES('文章標題:Empty_clob()的使用方法',EMPTY_CLOB())";
Connection conn = db.getConnection();
conn.setAutoCommit(false);

PreparedStatement ptmt = conn.prepareStatement(sqlBuffer.toString());
ptmt.executeUpdate();
strSql = "select content from article where subject = "+subject+" for update ";
ResultSet rs = ptmt.executeQuery(strSql);
if (rs.next()) {
/* 取出此CLOB物件 */
oracle.sql.CLOB clob = null;
clob = (oracle.sql.CLOB) rs.getClob("content");
/* 向CLOB物件中寫入資料 */
BufferedWriter out = new BufferedWriter(clob.getCharacterOutputStream());
out.write(content);
out.close();
out = null;