By default, Java uses $JAVA_HOME/jre/lib/security/cacerts to very an SSL certificate. You can add a certificate to this file: $ keytool -importcert -alias VeriSignClass3Interna... The default password for cacerts is: "changeit".

This code snippet gets the default keystore used by the Java keytool and displays the list of aliases along with the key type (certificate or private key). import java.io.File; import java.io.FileInputSt... The default keystore used by the above code is: $HOME/.keystore .

The annotation @org.hibernate.annotations.Type overrides the default hibernate mapping type used for a column. This can usually be omitted since Hibernate normaly infers the correct type to use. But @Type is required in ambiguous scenarios such as a java.util.Date attribute, which can map to SQL DATE , TIME or TIMESTAMP . You use the @Type("timestamp") annotation to tell Hibernate that a timestamp converter should be used, which identifies an instance of org.hibernate.type.TimestampType . @Type can also be used to identify custom type converters, which can be defined with @TypeDef at the class level: @TypeDefs( { @TypeDef( na... or with an xml file: <?xml version="1.0"?> <!DOCTYPE hibernate-mappi...

Just a reminder that I got this error when I set the Java system property javax.net.ssl.trustStore to a non-existing file (typo). The full error message when running Maven was: [ERROR] java.lang.RuntimeException: Unexpected e...

This was the error message: [ERROR] sun.security.validator.ValidatorExceptio... The certificate was actually signed by Verisign, but somehow failed to pass Java cert validation. To resolve the problem: Download the cert from the server (with RetrieveSSLCert , for example) Import the certificate into the keystore: $ keytool -import -trustcacerts -alias myserver -f... Define MAVEN_OPTS : $ export MAVEN_OPTS='-Djavax.net.ssl.trustStore=/h... The quotes must exist for the value of MAVEN_OPTS , and the path must be absolute ( ~/etc/mavenKeyStore.jks does not work).

You can define environment variables in the Tomcat context.xml file like this: <?xml version="1.0" encoding="UTF-8"?> <Context... which is equivalent to the following in web.xml : <env-entry> <env-entry-name>varName</env-entr... In Java code, the variable can be looked up like this: // import javax.naming.Context; // import javax...

Maven is a powerful yet complex tool. When I started learning Maven, the first obstacle was, of course, its complexity. The second, was the lack of documentation that can get me off the ground quickly. This tutorial is an attempt to create a pragmatic guide that aims to get you familiar with Maven in the quickest way possible. The main theme is to get you on some hands on experience to start out and lead you through the creation of a simple Java EE project as quickly as possible. Instead of trying to give you a good read, I try to get you on the journey right away. The topics are roughly ordered by the logical sequence but you can jump around in any way...

These are the minimum steps to configure Spring MVC in web.xml : Bootstrap Spring MVC by registering ContextLoaderListener : <listener> <listener-class> org.springfra... Register the DispatcherServlet : <servlet> <servlet-name>spring</servlet-name> ... Add servlet-mapping : <servlet-mapping> <servlet-name>spring</servle... Configure DispatcherServlet with WEB-INF/spring-servlet.xml , which configures WebApplicationContext specific to this servlet. <?xml version="1.0" encoding="UTF-8"?> <beans x... Optionally, use context-param in web.xml to configure the global WebApplicationContext : <!-- XmlWebApplicationContext is the default, so t... If you omit this section, you have to create file WEB-INF/applicationContext.xml , even if it's empty. This is the full web.xml : <?xml version="1.0" encoding="UTF-8"?> <web-app...

For some reason I don't know writing to files in Android is very complicated and tedious. Here is some code for those who might need it. Apps should write in the SD in the directory /Android/data/package_name/files/ so that it is deleted with the app uninstall. package randomname; import java.io.BufferedOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.FileWriter; import java.io.IOException; import java.io.OutputStream; import java.io.OutputStreamWriter; import java.nio.ByteBuffer; import android.content.Context; import android.os.Environment; import android.util.Log; public class FileIOLibrary { String packageName; boolean mExternalStorageAvailable = false; boolean mExternalStorageWriteable = false; FileIOLibrary(String packageNamep) { this.packageName=packageNamep; } public boolean isExternalStorageAvailable() { updateExternalStorageState(); return mExternalStorageAvailable; } public boolean isExternalStorageWritable() { updateExternalStorageState(); return mExternalStorageWriteable; } /** * writes the current state of SD card to the corresponding variables */ void updateExternalStorageState() {...

By default, tomcat uses an enhanced java.util.logging implementation called JULI, which can be configured at two different levels: Globally, with the ${catalina.base}/conf/logging.properties file. Per web application, with WEB-INF/classes/logging.properties . The configuration file is a normal Java properties file: Logging handlers are specified with the handlers property. handlers = 1catalina.org.apache.juli.FileHandler, ... The root logger can define its set of handlers using the .handlers property. .handlers = 1catalina.org.apache.juli.FileHandler,... A prefix may be added to handler names. The prefix starts with a digit and ends with a dot ( . ), for example: # 1catalina. is a prefix 1catalina.org.apache.j... System property replacement is performed for property values which contain ${systemPropertyName} . Each handler can have its own specific properties: 3manager.org.apache.juli.FileHandler.level = FINE ... Loggers can define their own...