Algorithms & Data Structures
Languages
Tools
Tag: Java
jsonschema2pojo
Generate Plain Old Java Objects from JSON or JSON-Schema.
Typed map in Java
Class definition:
public class TypedMap extends HashMap<String, Object> {
public <T> T getTyped(String key) {
return (T) super.get(key); //unchecked cast warning here
}
}
Usage:
TypedMap map = new TypedMap();
map.put("string", "string");
map.put("boolean", true);
map.put("integer", 4);
Integer i = map.getTyped("integer");
String s = map.getTyped("string");
boolean b = map.getTyped("boolean");
Spring/Jackson + @JsonView: filter REST response
Let's say we have a class User:
public class User { private int id; private String name; private String password; }
and we want to show on UI fields id and name, and we want to export fields name and password.
(more…)
Intellij Idea: Colored and clickable log4j/slf4j log
Just define appender in your logback.xml file as follows:
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender"> <encoder> <pattern>%highlight(%-5level) %d{yyyy-MM-dd'T'HH:mm:ss.SSS} %yellow([%thread]) %blue(%logger{36}\(%class{0}.java:%line\)) %msg%n</pattern> </encoder> </appender>
log4j - xml config
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE log4j:configuration SYSTEM "log4j.dtd"> <log4j:configuration xmlns:log4j='http://jakarta.apache.org/log4j/'> <!-- declare output to console --> <appender name="console" class="org.apache.log4j.ConsoleAppender"> <layout class="org.apache.log4j.PatternLayout"> <param name="ConversionPattern" value="%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n" /> </layout> </appender> <!-- declare output to file --> <appender name="file" class="org.apache.log4j.RollingFileAppender"> <param name="append" value="false" /> <param name="maxFileSize" value="10MB" /> <param name="maxBackupIndex" value="10" /> <param name="file" value="${catalina.home}/logs/myStruts1App.log" /> <layout class="org.apache.log4j.PatternLayout"> <param name="ConversionPattern" value="%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n" /> </layout> </appender> <!-- set common log level --> <root> <level value="ERROR" /> <appender-ref ref="console" /> <appender-ref ref="file" /> </root> <!-- set log level for custom packages --> <logger name="org.iblogger.lbn"> <level value="DEBUG"/> </logger> </log4j:configuration>
Free programming books
Как следует из названия, куча-мала ссылок на бесплатные книги по программированию. Выбор огромен - от ассемблера до JavaScript, от книг по Windows GUI до Spring.
Судя по history, актуальность ссылок активно поддерживается.
Ссылка на GitHub: https://github.com/vhf/free-programming-books/blob/master/free-programming-books.md