配置javaapachelog4jlog4j。xml配置多个错误
我想以前可能有人问过。但它还有一些关于如何使用该房产的额外问题。这是我的log4j。xml.:-
<?xml version="1.0" encoding="UTF-8"?>
<Configuration>
<Properties>
<Property name="myinfo">INFO</Property>
<Property name="mywarn" value="WARN"/>
</Properties>
<appender name="STDOUT" class="org.apache.log4j.ConsoleAppender">
<param name="threshold" value="info" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d{HH:mm:ss.SSS} [%thread] %-5level Line: %L - %msg%n" />
</layout>
</appender>
<appender name="LOGFILE" class="org.apache.log4j.RollingFileAppender">
<param name="File" value="c:/temp/logfile.log" />
<param name="Append" value="true" />
<param name="MaxFileSize" value="2MB" />
<param name="MaxBackupIndex" value="2" />
<priority value="WARN" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d{HH:mm:ss.SSS} [%thread] %-5level Line: %L - %msg%n" />
</layout>
</appender>
<appender name="UNMAPFILE" class="org.apache.log4j.RollingFileAppender">
<param name="File" value="c:/temp/unmapped.log" />
<param name="Append" value="true" />
<param name="MaxFileSize" value="2MB" />
<param name="MaxBackupIndex" value="2" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern"
value="%d [%t] %-5p %c - %m%n" />
</layout>
</appender>
<category name="com.ma.dev" additivity="false">
<priority value="INFO" /> <!-- <priority value="${myinfo}" /> -->
<appender-ref ref="STDOUT" />
<appender-ref ref="LOGFILE" />
</category>
<root>
<priority value="WARN" />
<appender-ref ref="UNMAPFILE" />
</root>
</Configuration>
以下是我的Java代码:-
包com。文科硕士德夫
import org.apache.log4j.Logger;
public class App
{
public static Logger logger = Logger.getLogger(App.class.getName());
public static void main( String[] args )
{
logger.info("test");
System.out.println( "Hello World!" );
logger.warn("Dummy warning");
}
}
我收到以下错误/警告:-
log4j:WARN Continuable parsing error 2 and column 16
log4j:WARN Document root element "Configuration", must match DOCTYPE root "null".
log4j:WARN Continuable parsing error 2 and column 16
log4j:WARN Document is invalid: no grammar found.
log4j:ERROR DOM element is - not a <log4j:configuration> element.
log4j:WARN No appenders could be found for logger (com.ma.dev.App).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
Hello World!
Process finished with exit code 0
在log4j中。xml文件我有以下属性:-
<Properties>
<Property name="myinfo">INFO</Property>
<Property name="mywarn" value="WARN"/>
</Properties>
我想使用此属性将优先级更改为:-
<priority value="${myinfo}" />
可能吗
# 1 楼答案
之所以会出现这些错误,是因为在DOCTYPE元素中没有包含log4j名称空间。文件顶部应如下所示:
至于你的第二个问题,我不太确定这是否可能
# 2 楼答案
看起来你试图混用Log4j 1。x和2。x配置
如果你想使用Log4j 2。x、 您应该创建log4j2。类路径中的xml。 简单的例子是:
此外,还应该有log4j-api-2.12.1。jar和log4j-core-2.12.1。jar存储在类路径中,然后就可以使用它了
更多详细信息,请参见here