at 2012-01-15 will be closed
CodeSearch будет закрыт, виной тому Google+ and Dart
proof
Monday, October 17, 2011
Monday, October 10, 2011
JSON parse in java
google-json (1.7.1) is well designed and very fast with preinitializited new Gson() instance.
time in ms in 10 iterations
If you haven't object to cast the parsed data - you can use Collection or Map
Gson gson = new Gson();
time in ms in 10 iterations
Data data = gson.fromJson(json, Data.class);
>>> alexey: GoogleJsonParse.main time =0= 62
>>> alexey: GoogleJsonParse.main time =1= 3
>>> alexey: GoogleJsonParse.main time =2= 6
>>> alexey: GoogleJsonParse.main time =3= 1
>>> alexey: GoogleJsonParse.main time =4= 1
>>> alexey: GoogleJsonParse.main time =5= 9
>>> alexey: GoogleJsonParse.main time =6= 1
>>> alexey: GoogleJsonParse.main time =7= 1
>>> alexey: GoogleJsonParse.main time =8= 2
>>> alexey: GoogleJsonParse.main time =9= 1
If you haven't object to cast the parsed data - you can use Collection or Map
Type typeOfT = new TypeToken<Map<String, String>>(){}.getType();
Map<String, String> data = gson.fromJson(json, typeOfT);
Java date convert: long milliseconds to string iso 8601
1305637849064 to 2011-10-10T07:46:56.394+0000
Time to covert is 1ms
Time to covert is 1ms
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.TimeZone;
public class MyDateUtilStuff {
private static DateFormat ISO_8601_DATE_TIME = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSZZZZZ");
static {
ISO_8601_DATE_TIME.setTimeZone(TimeZone.getTimeZone("UTC"));
}
public static void main(String[] args) {
String string = "1305637849064";
long startTime = System.currentTimeMillis();
Date date = new Date();
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(Long.parseLong(string));
String outDate = ISO_8601_DATE_TIME.format(date);
long time = System.currentTimeMillis() - startTime;
System.out.println(">>> alexey: MyDateUtilStuff.main ii = " + time);
System.out.println(">>> alexey: MyDateUtilStuff.main outDate = "
+ outDate);
}
}
Sunday, October 9, 2011
The BalusC Code: DateUtil
The BalusC Code: DateUtil: Useful date utilities
An utility class with some fairly simple methods and some very useful methods (such as determineDateFormat() ). This...
An utility class with some fairly simple methods and some very useful methods (such as determineDateFormat() ). This...
Thursday, October 6, 2011
Sunday, October 2, 2011
Интересно про обман с газом в Молдове
Текст не мой.
Saturday, October 1, 2011
Solved two mysql+tomcat problems
Solved two mysql+tomcat problems:
1. The web application registered the JDBC driver [com.mysql.jdbc.Driver] but failed to unregister it when the web.
2. The web application appears to have started a thread named [MySQL Statement Cancellation Timer] but has failed.
1. The web application registered the JDBC driver [com.mysql.jdbc.Driver] but failed to unregister it when the web.
PROBLEM:
SOLUTION:
http://stackoverflow.com/questions/3320400/jdbc-driver-unregisted-when-the-web-application-stops
2. The web application appears to have started a thread named [MySQL Statement Cancellation Timer] but has failed.
PROBLEM:
SOLUTION:
http://bugs.mysql.com/bug.php?id=36565
To upgrage mysql connector jar.
http://dev.mysql.com/downloads/connector/j/
1. The web application registered the JDBC driver [com.mysql.jdbc.Driver] but failed to unregister it when the web.
2. The web application appears to have started a thread named [MySQL Statement Cancellation Timer] but has failed.
1. The web application registered the JDBC driver [com.mysql.jdbc.Driver] but failed to unregister it when the web.
PROBLEM:
org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc
SEVERE: The web application [/rest] registered the JDBC driver [com.mysql.jdbc.Driver] but failed to unregister it when the web
SOLUTION:
http://stackoverflow.com/questions/3320400/jdbc-driver-unregisted-when-the-web-application-stops
import java.sql.Driver;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.Enumeration;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
public class JdbcListener implements ServletContextListener
{
private static final Logger LOG = Logger.getLogger(JdbcListener.class);
public void contextDestroyed(ServletContextEvent sce)
{
deregisterJdbcDriver();
}
public void contextInitialized(ServletContextEvent sce)
{
}
private void deregisterJdbcDriver()
{
// This manually deregisters JDBC driver, which prevents Tomcat 7 from complaining about memory leaks
Enumerationdrivers = DriverManager.getDrivers();
while (drivers.hasMoreElements())
{
Driver driver = drivers.nextElement();
try
{
DriverManager.deregisterDriver(driver);
LOG.info(String.format("Deregistering jdbc driver: %s", driver));
}
catch (SQLException e)
{
LOG.info(String.format("Error deregistering driver %s", driver), e);
}
}
}
}
2. The web application appears to have started a thread named [MySQL Statement Cancellation Timer] but has failed.
PROBLEM:
org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
SEVERE: The web application [/rest] appears to have started a thread named [MySQL Statement Cancellation Timer] but has failed
SOLUTION:
http://bugs.mysql.com/bug.php?id=36565
To upgrage mysql connector jar.
http://dev.mysql.com/downloads/connector/j/
mysql
mysql-connector-java
5.1.17
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