Posted on 2008-01-28 09:53
G_G 閱讀(361)
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hibernate
1.數(shù)據(jù)庫
mysql>?desc?lotteryinformation?;
+-------------+--------------+------+-----+---------+-------+
|?Field???????|?Type?????????|?Null?|?Key?|?Default?|?Extra?|
+-------------+--------------+------+-----+---------+-------+
|?id??????????|?int(11)??????|?NO???|?PRI?|?NULL????|???????|
|?type????????|?varchar(255)?|?NO???|?????|?NULL????|???????|
|?title???????|?varchar(255)?|?YES??|?????|?NULL????|???????|
|?inputTime???|?datetime?????|?YES??|?????|?NULL????|???????|
|?content?????|?blob?????????|?YES??|?????|?NULL????|???????|
|?recommended?|?bit(1)???????|?YES??|?????|?NULL????|???????|
|?categories??|?varchar(255)?|?YES??|?????|?NULL????|???????|
+-------------+--------------+------+-----+---------+-------+
2.代碼
??????? //插入
??? ??? Session?sess?=??HibernateSessionFactory.getSession();
????????Transaction?tr?=?sess.beginTransaction();
????????LotteryNew?nn?=?new?LotteryNew();
????????nn.setInputTime(new?Date());
????????nn.setCategories("t");
????????nn.setTitle("new");
????????nn.setRecommended(true);
????????Blob?bo?=?Hibernate.createBlob("ggggg".getBytes());
????????nn.setContent(bo);
????????sess.save(nn);
????????tr.commit();
????????HibernateSessionFactory.closeSession();
???????
??? ??? //修改
????????sess?=??HibernateSessionFactory.getSession();
????????tr?=?sess.beginTransaction();
????????LotteryNew?lo?=?(LotteryNew)?sess.get(LotteryNew.class,?nn.getId());
????????Blob?bog?=?Hibernate.createBlob("xxxxx".getBytes());
????????lo.setContent(bog);
????????tr.commit();
????????HibernateSessionFactory.closeSession();
????????
??????? //查找
????????sess?=??HibernateSessionFactory.getSession();
????????LotteryNew?lo2?=?(LotteryNew)?sess.get(LotteryNew.class,?lo.getId());
????????InputStream?in?=?lo2.getContent().getBinaryStream()?;
????????byte[]?bbr?=?new?byte[in.available()];
????????in.read(bbr);
????????System.out.println(new?String(bbr));
????????HibernateSessionFactory.closeSession();