大约有 19,000 项符合查询结果（耗时：0.0304秒） [XML]
Correct use of flush() in JPA/Hibernate
...ils of em.flush() are implementation-dependent.
In general anyway, JPA providers like Hibernate can cache the SQL instructions they are supposed to send to the database, often until you actually commit the transaction.
For example, you call em.persist(), Hibernate remembers it has to make a database...
What Java ORM do you prefer, and why? [closed]
...e SQL queries, and shift a lot of my processing into the database.
So consider just using the JDBC package.
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How to add text inside the doughnut chart using Chart.js?
How to render Text inside the doughnut chart, I am using ChartJs .
14 Answers
14
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How do you represent a JSON array of strings?
This is all you need for valid JSON, right?
4 Answers
4
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The character encoding of the HTML document was not declared
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second line produces this error in W3 validator for docytype html: Bad value encoding for attribute http-equiv on element meta.
– yitwail
Sep 28 '13 at 0:38
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Performing user authentication in Java EE / JSF using j_security_check
...s = {"/logout"})
public class LogoutServlet extends HttpServlet {
@Override
protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
HttpSession session = request.getSession(false);
// Destroys the session for this user.
i...
Ruby on Rails generates model field:type - what are the options for field:type?
...generate a new model and forget the syntax for referencing another model's ID. I'd look it up myself, but I haven't figured out, among all my Ruby on Rails documentation links, how to find the definitive source.
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Android WebView style background-color:transparent ignored on android 2.2
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it doesn't work in android 3.x if you are using android:hardwareAccelerated="true"
– Macarse
Jul 28 '11 at 18:46
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Rearranging Tab Bar Controller Order in StoryBoard
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Tab dragging ! Ok I didn't even know we could drag the tabs. Not very intuitive since tabs are not selectable...
– Pierre de LESPINAY
Jun 16 '14 at 13:27
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How to find a table having a specific column in postgresql
...t c.relname
from pg_class as c
inner join pg_attribute as a on a.attrelid = c.oid
where a.attname = <column name> and c.relkind = 'r'
sql fiddle demo
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