http://csvjdbc.sourceforge.net/. Einschränkungen (natürlich):
CsvJdbc accepts only SQL SELECT queries from a single table and does not support INSERT, UPDATE, DELETE or CREATE statements. Joins between tables in SQL SELECT queries are not supported.
Open Source
Putziger kleiner OR-Mapper: ORMLite, für JDBC und auch für Android
package tutego; import java.sql.SQLException; import com.j256.ormlite.dao.*; import com.j256.ormlite.db.HsqldbDatabaseType; import com.j256.ormlite.field.DatabaseField; import com.j256.ormlite.jdbc.JdbcConnectionSource; import com.j256.ormlite.support.ConnectionSource; import com.j256.ormlite.table.*; @DatabaseTable class Contact { @DatabaseField( generatedId = true ) Long id; @DatabaseField String name; // Setter/Getter sparen } public class ORMLiteDemo { public static void main( String[] args ) { System.setProperty( "tutegoHsqldbDatabasePath", "TutegoDB" ); String url = "jdbc:hsqldb:file:${tutegoHsqldbDatabasePath};shutdown=true"; ConnectionSource connectionSource; try { connectionSource = new JdbcConnectionSource( url, "sa", "", new HsqldbDatabaseType() ); Dao<Contact, String> dao = DaoManager.createDao( connectionSource, Contact.class ); // TableUtils.createTable( connectionSource, Contact.class ); Contact c1 = new Contact(); c1.name = "Chris"; dao.create( c1 ); Contact c2 = new Contact(); c2.name = "Juvy"; dao.create( c2 ); Contact c3 = dao.queryForId( "1" ); System.out.println( c3.name ); connectionSource.close(); } catch ( SQLException e ) { e.printStackTrace(); } } }
1. Klassen annotieren mit den ORMLite-Annotationen oder mit JPA-Annotationen
2. Sind die Tabellen nicht da, muss man TableUtils.createTable( connectionSource, Contact.class ); aufrufen, dann erzeugt ORMLite die Tabellen.
3. Der Rest ist einfach, siehe Beispiel 🙂
Mehr unter http://ormlite.com/.
Guava kommt bald in die Version 13
Und das erste RC ist raus, zur Beschreibung mehr hier: http://code.google.com/p/guava-libraries/wiki/Release13.
JDOM 2.0.1 freigegeben
http://www.jdom.org/news/index.html. Von der Webseite:
04.28.2012: JDOM 2.0.1 Released!
JDOM 2.0.1 is here!
JDOM 2.0.1 Introduces official support for Android! See the JDOM and Android page. JDOM 2.0.1 also fixes a bug in the ‚Compact‘ output of XML.
Get JDOM 2.0.0 Here! or from the maven-central repository here: Group: org.jdom, Articact: jdom
04.08.2012: JDOM 2.0.0 Released!
JDOM 2.0.0 is here!
JDOM 2.0.0 brings JDOM in to the world of Generics and other Java language items introduced with Java 5. As a result, JDOM 2.0.0 requires Java 5 or later, but is only fully supported on Java 6 and later.
Get JDOM 2.0.0 Here! or from the maven-central repository here: Group: org.jdom, Articact: jdom
In der Insel habe ich meine Programme nun auf JDOM 2 gebracht – ohne große Probleme. Nur die Generics muss ich in der Doku dokumentieren. Das einzige, was ich umschreiben musste, was das Kapitel über XPath, dazu gleich ein eigener Beitrag.
Google Guava Version 12 veröffentlicht
Jerry: ein jQuery in Java
Jerry ist eine Open-Source-Lib, die eine von jQuery bekannte Funktionalität in Java abbildet. Beispiele von der Webseite: http://jodd.org/doc/jerry/index.html.
import static jodd.lagarto.dom.jerry.Jerry.jerry;
...
Jerry doc = jerry(html);
doc.$("div#jodd p.neat").css("color", "red").addClass("ohmy");
und:
doc.$("select option:selected").each(new JerryFunction() {
public boolean onNode(Jerry $this, int index) {
str.append($this.text()).append(' ');
return true;
}
});
Statt aus einem String kann die Eingabe auch direkt aus der Datei kommen:
File file = new File(SystemUtil.getTempDir(), "allmusic.html");
NetUtil.downloadFile("http://allmusic.com", file);
// create Jerry, i.e. document context
Jerry doc = Jerry.jerry(FileUtil.readString(file));
// parse
doc.$("div#new_releases div.list_item").each(new JerryFunction() {
public boolean onNode(Jerry $this, int index) {
System.out.println("-----");
System.out.println($this.$("div.album_title").text());
System.out.println($this.$("div.album_artist").text().trim());
return true;
}
});
Apache POI 3.8 ist fertig
Nach genau einem Jahr Arbeit an dem Release 3.8 ist die neue Version von Apache POI veröffentlicht. Die Änderungen gibt es unter http://poi.apache.org/changes.html, Download unter http://poi.apache.org/download.html. Links zu den Component APIs:
Apache Ant 1.8.3 freigegeben
Änderungen unter http://svn.apache.org/repos/asf/ant/core/trunk/WHATSNEW aufgeführt:
Changes from Ant 1.8.3 TO Ant 1.9.0
===================================
Changes that could break older environments:
-------------------------------------------
Fixed bugs:
-----------
* External XML catalog resolver failed to use project basedir when given an
unmentioned relative path like the internal resolver does.
Bugzilla Report 52754.
* Fixed some potential stream leaks.
Bugzilla Reports 52738, 52740, 52742, 52743.
Other changes:
--------------
Changes from Ant 1.8.2 TO Ant 1.8.3
===================================
Changes that could break older environments:
-------------------------------------------
* The Enumeration returned by AntClassLoader#getResources used to
return null in nextElement after hasNextElement would return false.
It has been changed to throw a NoSuchElementException instead so
that it now adheres to the contract of java.util.Enumeration.
Bugzilla Report 51579.
Fixed bugs:
-----------
* Removed buggy duplicate JAR list in RPM mode.
Bugzilla Report 52556.
* Launcher fixed to pass the right class loader parent.
Bugzilla Report 48633.
* <junitreport> mishandled ${line.separator}.
Bugzilla Report 51049.
* <junitreport> did not work in embedded environments on JDK 7.
Nor did <xslt> when using Xalan redirects.
Bugzilla Report 51668, 52382.
* Encoding of unicode escape sequences by the property file task
Bugzilla Report 50515.
* The code that implicitly sets the -source switch if only -target
has been specified in <javac> was broken for Java 5 and 6.
Bugzilla Report 50578.
* MailLogger ignore the Maillogger.starttls.enable property.
Bugzilla Report 50668.
* Delete task example does not work
Bugzilla Report 50816.
* <splash>'s proxy handling has been delegated to <setproxy>
internally so the two tasks are consistent. <splash>'s way of not
setting a proxy caused problems with other Java libraries.
Bugzilla Report 50888.
* Include task breaks dependencies or extension-points for multiple
files.
Bugzilla Report 50866.
* Read on System.in hangs for forked java task.
Bugzilla Report 50960.
* FileResource specified using basedir/name attributes was non-functional.
* Resource collection implementation of mapped PropertySet returned
unusable resources.
* The hasmethod condition failed with a NullPointerException when
ignoresystemclasses is true and Ant tried to load a "restricted
class" - i.e. a class that the Java VM will only accept when loaded
via the bootclassloader (a java.* class).
It will now fail with a more useful error message.
Bugzilla Report 51035.
* Exec task may mix the stderr and stdout output while logging it
Bugzilla Report 50507.
* Missing space between "finished" and timestamp in task/target
finish message from ProfileLogger.
Bugzilla Report 51109.
* Redirecting the output of a java, exec or apply task could print in the
error output stream some "Pipe broken" errors.
Bugzilla Report 48789.
* ZipFile failed to clean up some resources which could lead to
OutOfMemoryException while unzipping large archives.
A similar problem in ZipArchiveOutputStream has been fixed as well.
Bugzilla Report 42696.
* quiet attribute added to the copy and move tasks, to be used together
with failonerror=false, so warnings won't get logged
Bugzilla Report 48789.
* System.in was closed and not readable anymore by the DefaultInputHandler
when Ant is used via its Java API.
Bugzilla Report 51161
* <sync> only supported a single non-fileset resource collection even
though the manual said it could be multiple.
* <sync> didn't work properly when working on resource collections.
Bugzilla Report 51462.
* <augment> cause a NullPointerException if it was used in a target
that was invoked by multiple targets from the command line.
Bugzilla Report 50894.
* The ZipFile class could read past the start of the file if the
given file is not a ZIP archive and it is smaller than the size of
a ZIP "end of central directory record".
* <javac> would create the empty package-info.class file in the wrong
directory if no destdir was specified. Note it may still pick the
wrong directory if you specify more than one source directory but
no destDir. It is highly recommended that you always explicitly
specify the destDir attribute.
Bugzilla Report 51947.
* packagemapper now honors the handleDirSep attribute.
Bugzilla Report 51086.
* the attributes of macrodef tasks had their values run through
property expansion twice. Still true by default, but can be disabled.
Bugzilla Report 42046.
* jvc doesn't like it if source file names in argument files are
quoted.
Bugzilla Report 31667.
* ZipFile didn't work properly for archives using unicode extra
fields rather than UTF-8 filenames and the EFS-Flag.
* Access to DirectoryScanner's default excludes wasn't synchronized.
Bugzilla Report 52188.
* When a Project instance was created by a custom tasks its
createTask method didn't work.
Bugzilla Report 50788.
Other changes:
--------------
* -f/-file/-buildfile accepts a directory containing build.xml.
* The <javacc>, <jjtree> and <jjdoc> now support a new maxmemory
attribute.
Bugzilla Report 50513.
* the documented inputstring attribute of sshexec has been
implemented and the actually existing attribute inputproperty
documented.
Bugzilla Report 50576.
* The concat task now permits the name of its exposed resource
by means of its 'resourcename' attribute.
* The expandproperties filter now accepts a nested propertyset
which, if specified, provides the properties for expansion.
Bugzilla Report 51044.
* <junit filtertrace="true"/> will no longer filter out the very
first line of the stacktrace containing the original exception
message even if it matches one of the filter expressions.
* Upgraded to Apache AntUnit 1.2
* Provide read access to Mkdir.dir. Bugzilla Report 51684.
* <delete> and <move> have a new attribute performGCOnFailedDelete
that may - when set to true - help resolve some problems with
deleting empty directories on NFS shares.
Bugzilla Report 45786.
* <loadfile> and <loadresource> used to log at level INFO to signal a
property hasn't been set when the resource was empty even if the
quiet attribute was set to true. They will now use VERBOSE
instead.
Bugzilla Report 52107.
* <javac> has a new attribute createMissingPackageInfoClass that can
be set to false to prevent Ant from creating empty dummy classes
used for up-to-date-ness checks.
Bugzilla Report 52096.
* URLResources#isExists has become less noisy.
Bugzilla Report 51829.
* The <retry> task has a new optional attribute retryDelay that can
be used to make the task sleep between retry attempts.
Bugzilla Report 52076.
* <signjar> has new attributes that control the signature and digest
algorithms.
Bugzilla Report 52344.
* Initial support for Java 8.
* <sshexec> can optionally create a pseudo terminal (like ssh -t)
Bugzilla Report 52554.
Erster Milestone von Jersey 2, implementiert JAX-RS 2
Weitere Details im Blog http://marek.potociar.net/2012/02/22/first-milestone-build-of-jersey-2-0/. Für Clients gibt es vielleicht die größte Änderung: Die Einführung der JAX-RS Client API. Die API ist allerdings noch nicht verabschiedet, kann sich daher also ändern. Die bisherige Spezi von JAX-RS liegt unter http://jcp.org/aboutJava/communityprocess/edr/jsr339/index.html.
Java –> Flash mit PlayN
Sehr sehr cool, mit http://code.google.com/p/playn/ kann man mit GWT eine Java-Anwendung schreiben und der GWT-Compiler setzt das nicht nur in JavaScript um, sondern in ActionScript, und da hinten kommt Flash raus.
JMeter 2.6
Änderungen: http://jmeter.apache.org/changes.html
Update der Hibernate Version 4.0.1
Erst ein paar Tage ist es her, da kam Hibernate 4 heraus. Nun gibt es auch schon das erste Update. Die Änderungen: https://hibernate.onjira.com/secure/ReleaseNote.jspa?projectId=10031&version=11754
Google Guava 11
Neues unter http://code.google.com/p/guava-libraries/wiki/Release11, genauer http://docs.guava-libraries.googlecode.com/git-history/v11.0/jdiff/changes.html. 2 neue Pakete sind:
- http://docs.guava-libraries.googlecode.com/git-history/v11.0/javadoc/com/google/common/hash/package-summary.html und
- http://docs.guava-libraries.googlecode.com/git-history/v11.0/javadoc/com/google/common/math/package-summary.html
Mit der neuen MathInt Klasse beschäftigt sich ausführlicher der Blogpost http://marxsoftware.blogspot.com/2011/12/guava-release-11s-intmath.html.
FindBugs 2 ist da
Nach dem auf der Mailingliste schon seit längerem eine Version 2 angekündigt wurde, mussten Entwickler doch noch längere Zeit warten. Jetzt ist es soweit. Infos unter http://findbugs.sourceforge.net/findbugs2.html und http://code.google.com/p/findbugs/w/list.
Die Version 2 kann man gleich über JNLP mit ein paar Sourcen ausprobieren:
Im JDK finden sich immer noch einige Fehler, toll, was FindBugs so findet. Das hier zum Beispiel:
- if (name != null || name.length > 0). Ist name == null, wird name.length zu einer NPE führen. Hier muss ein && statt ||.
oder
- if (lookbehind.length() == 1) {
char c0 = (lookbehind == null) ? ‚|‘ : lookbehind.charAt(0);
oder
- if (!wellformed){
if (!wellformed){
oder
if ((parent instanceof LiteralElement) ||
(parent instanceof LiteralElement)) {
oder
- boolean isInitValueValid(int v) {
if ((v < 0) || (v > SnmpUnsignedInt.MAX_VALUE)) {
COOL!
Spring Update auf Version 3.1
Features wie auf http://www.springsource.org/node/3334 genannt:
- Comprehensive Java-based application configuration
- New caching abstraction
- Environment support, including bean definition profiles and hierarchical property source management
- Support for Hibernate 4
- Java 7 fork/join and JDBC 4.1 support
Hibernate in Version 4
Download wie üblich unter http://www.hibernate.org/. News im Blog (http://in.relation.to/Bloggers/HibernateCore40IsFinal), gerade offline…
Flex geht zu Apache, das ist dann wohl das Aus
Adobe kündigte dies in http://blogs.adobe.com/flex/2011/11/your-questions-about-flex.html an. Damit ist klar: HTML 5 is the way to go. Flex war ein Nischenprodukt und der Wechsel zum Friedhof Apache wird das nicht ändern. Tschüss zur nächsten Client-Technologie.
Google Plugin für Eclipse ist nun quelloffen
Mehr Details unter http://googlewebtoolkit.blogspot.com/2011/11/google-plugin-for-eclipse-gpe-is-now.html. Was das für Konsequenzen hat, muss sich aber erst noch zeigen.
ASM 4.0 mit Java 7, invokedynamic und interne Änderungen
Schöner Vergleich von Java-Serialisierern
https://github.com/eishay/jvm-serializers/wiki. Der Java SE Default Serialisierer ist mit der Beste, interessant sind aber die Vergleiche zwischen XML und JSON und diversen Implementierungen auf dem Markt.