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