本文介紹了Log4j2-版本2.5-如何使用java.util.properties對(duì)象配置log4j2的處理方法，對(duì)大家解決問題具有一定的參考價(jià)值，需要的朋友們下面隨著小編來一起學(xué)習(xí)吧！

問題描述

我正在嘗試使用屬性對(duì)象配置log4j2版本2.5。這樣做的原因是從版本1.2.17遷移。我不能直接使用屬性文件。我們對(duì)它做了一些程序化的修改。

以下是我嘗試過的內(nèi)容：

LogTest.java

public class LogTest {

   static {
          System.setProperty("log4j.configurationFactory",     "logsample.common.util.LogsampleConfigurationFactory");
   }

    private static Logger logger =      LogManager.getLogger(LogTest.class.getName());

    public static void main(String[] args) throws Exception
    {
        logger.debug("First log");
        logger.info("Infoed");
    }
}

跟蹤屬性

name = PropertiesConfig

property.filename = D:/rolling/rollingtest.log


appenders = file


appender.file.type = File
appender.file.name = LOGFile
appender.file.fileName = ${filename}
appender.file.layout.type = PatternLayout
appender.file.layout.pattern = %d %p %C{1.} [%t] %m%n


loggers = file

logger.file.name = logware.common.util
logger.file.level = debug
logger.file.appenderRefs = file
logger.file.appenderRef.file.ref = LOGFile

LogwareConfigurationFactory.java

public class LogsampleConfigurationFactory extends ConfigurationFactory {

    @Override
    protected String[] getSupportedTypes() {
        return new String[]{".properties", "*"};
    }

    @Override
    public Configuration getConfiguration(ConfigurationSource source) {


        return new PropertiesConfiguration(createConfigurationSource(), null);
    }



    @Override
    public Configuration getConfiguration(String name, URI configLocation) {
        return new PropertiesConfiguration(createConfigurationSource(), null);
    }

    private ConfigurationSource createConfigurationSource()
    {
        Properties p = new Properties();
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        InputStream in = null;
        try {
            p.load(new  FileInputStream("D:/log4jSample/properties/trace.properties"));

            p.store(out, null);

        } catch (IOException e) {
            e.printStackTrace();
        }

        in = new ByteArrayInputStream(out.toByteArray());

        ConfigurationSource configSrc = null;
        try {
            configSrc = new ConfigurationSource(in);
        }
        catch (IOException i)
        {

        }
        return configSrc;
    }
}

當(dāng)我運(yùn)行LogTest類時(shí)，它無法獲取指針為空的LogContext。

異常堆棧

java.lang.ExceptionInInitializerError
Caused by: java.lang.NullPointerException
at org.apache.logging.log4j.core.config.builder.impl.BuiltConfiguration.<init>(BuiltConfiguration.java:58)
at org.apache.logging.log4j.core.config.properties.PropertiesConfiguration.<init>(PropertiesConfiguration.java:36)
at logware.common.util.LogwareConfigurationFactory.getConfiguration(LogwareConfigurationFactory.java:46)
at org.apache.logging.log4j.core.config.ConfigurationFactory$Factory.getConfiguration(ConfigurationFactory.java:427)
at org.apache.logging.log4j.core.config.ConfigurationFactory.getConfiguration(ConfigurationFactory.java:256)
at org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:561)
at org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:578)
at org.apache.logging.log4j.core.LoggerContext.start(LoggerContext.java:214)
at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:235)
at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:41)
at org.apache.logging.log4j.LogManager.getContext(LogManager.java:167)
at org.apache.logging.log4j.LogManager.getLogger(LogManager.java:522)
at logware.common.util.LogTest.<clinit>(LogTest.java:58)

因此，我沒有將rootComponent放入PropertiesConfiguration構(gòu)造函數(shù)中。但我不知道它應(yīng)該是什么。
在這方面有任何指導(dǎo)或線索都是很好的。

推薦答案

對(duì)于2.5，我建議您這樣做：

@Override
public Configuration getConfiguration(ConfigurationSource source) {
    PropertiesConfigurationFactory factory = new PropertiesConfigurationFactory();
    return factory.getConfiguration(source);
}

在最新版本中，您必須對(duì)其進(jìn)行修改才能執(zhí)行以下操作：

@Override
public Configuration getConfiguration(LoggerContext ctx, ConfigurationSource source) {
    PropertiesConfigurationFactory factory = new PropertiesConfigurationFactory();
    return factory.getConfiguration(ctx, source);
}

這篇關(guān)于Log4j2-版本2.5-如何使用java.util.properties對(duì)象配置log4j2的文章就介紹到這了，希望我們推薦的答案對(duì)大家有所幫助，