Initialize logger by java

Initialize logger by java

This task use java to initialize logger.

Initialize logger

1. Create /cfg/log-conf.xml as following
2. Create initLog method as following
3. At beginning of program, call initLog method

/cfg/log-conf.xml

---

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration>
    <appender name="fileAppender" class="org.apache.log4j.RollingFileAppender">
        <param name="File"   value="log/bruchia.log" />
        <param name="Append" value="true" />
        <param name="MaxFileSize" value="1024KB" />
        <param name="MaxBackupIndex" value="10240" />
        <layout class="org.apache.log4j.PatternLayout">
            <param name="ConversionPattern" 
                   value="%d %-5p [%t] %C{2} %M (%F:%L) - %m%n"/>
        </layout>     
    </appender>
    <appender name="STDOUT" class="org.apache.log4j.ConsoleAppender">
        <layout class="org.apache.log4j.PatternLayout">
            <param name="ConversionPattern"
                   value="%d %-5p [%t] %C{2} %M (%F:%L) - %m%n"/>
        </layout>     
    </appender>
    
    <category name="org.apache.log4j.xml">
        <priority value="warn" />
        <appender-ref ref="fileAppender" />
        <appender-ref ref="STDOUT" />
    </category>
    
    <logger name="org.apache" >
            <level value ="warn" />
    </logger>
    
    <root>
        <priority value ="info" />
        <appender-ref ref="fileAppender" />
        <appender-ref ref="STDOUT" />
    </root>
</log4j:configuration>
    

formattedraw

1	<?xml version="1.0" encoding="UTF-8"?>
2	<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
3	<log4j:configuration>
4	<appender name="fileAppender" class="org.apache.log4j.RollingFileAppender">
5	<param name="File" value="log/bruchia.log" />
6	<param name="Append" value="true" />
7	<param name="MaxFileSize" value="1024KB" />
8	<param name="MaxBackupIndex" value="10240" />
9	<layout class="org.apache.log4j.PatternLayout">
10	<param name="ConversionPattern"
11	value="%d %-5p [%t] %C{2} %M (%F:%L) - %m%n"/>
12	</layout>
13	</appender>
14	<appender name="STDOUT" class="org.apache.log4j.ConsoleAppender">
15	<layout class="org.apache.log4j.PatternLayout">
16	<param name="ConversionPattern"
17	value="%d %-5p [%t] %C{2} %M (%F:%L) - %m%n"/>
18	</layout>
19	</appender>
20
21	<category name="org.apache.log4j.xml">
22	<priority value="warn" />
23	<appender-ref ref="fileAppender" />
24	<appender-ref ref="STDOUT" />
25	</category>
26
27	<logger name="org.apache" >
28	<level value ="warn" />
29	</logger>
30
31	<root>
32	<priority value ="info" />
33	<appender-ref ref="fileAppender" />
34	<appender-ref ref="STDOUT" />
35	</root>
36	</log4j:configuration>

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration>
    <appender name="fileAppender" class="org.apache.log4j.RollingFileAppender">
        <param name="File"   value="log/bruchia.log" />
        <param name="Append" value="true" />
        <param name="MaxFileSize" value="1024KB" />
        <param name="MaxBackupIndex" value="10240" />
        <layout class="org.apache.log4j.PatternLayout">
            <param name="ConversionPattern" 
                   value="%d %-5p [%t] %C{2} %M (%F:%L) - %m%n"/>
        </layout>     
    </appender>
    <appender name="STDOUT" class="org.apache.log4j.ConsoleAppender">
        <layout class="org.apache.log4j.PatternLayout">
            <param name="ConversionPattern"
                   value="%d %-5p [%t] %C{2} %M (%F:%L) - %m%n"/>
        </layout>     
    </appender>
    
    <category name="org.apache.log4j.xml">
        <priority value="warn" />
        <appender-ref ref="fileAppender" />
        <appender-ref ref="STDOUT" />
    </category>
    
    <logger name="org.apache" >
            <level value ="warn" />
    </logger>
    
    <root>
        <priority value ="info" />
        <appender-ref ref="fileAppender" />
        <appender-ref ref="STDOUT" />
    </root>
</log4j:configuration>

initLog method

---

private static void initLog() {
    try {
        String configDir = new File(System.getProperty("user.dir"), "cfg").getAbsolutePath();
        String logConfigFile = new File(configDir, "log-conf.xml").getAbsolutePath();
        String logDir = new File(System.getProperty("user.dir"), "log").getAbsolutePath();
        String stdoutLogFile = new File(logDir, "stdout.log").getAbsolutePath();
   
        DOMConfigurator.configure(logConfigFile);
        System.setErr(new PrintStream(new BufferedOutputStream(new FileOutputStream(stdoutLogFile)), true));
        System.setOut(new PrintStream(new BufferedOutputStream(new FileOutputStream(stdoutLogFile)), true));
    } catch (Exception e) {
        e.printStackTrace();
    }
}
    

formattedraw

1	private static void initLog() {
2	try {
3	String configDir = new File(System.getProperty("user.dir"), "cfg").getAbsolutePath();
4	String logConfigFile = new File(configDir, "log-conf.xml").getAbsolutePath();
5	String logDir = new File(System.getProperty("user.dir"), "log").getAbsolutePath();
6	String stdoutLogFile = new File(logDir, "stdout.log").getAbsolutePath();
7
8	DOMConfigurator.configure(logConfigFile);
9	System.setErr(new PrintStream(new BufferedOutputStream(new FileOutputStream(stdoutLogFile)), true));
10	System.setOut(new PrintStream(new BufferedOutputStream(new FileOutputStream(stdoutLogFile)), true));
11	} catch (Exception e) {
12	e.printStackTrace();
13	}
14	}

private static void initLog() {
    try {
        String configDir = new File(System.getProperty("user.dir"), "cfg").getAbsolutePath();
        String logConfigFile = new File(configDir, "log-conf.xml").getAbsolutePath();
        String logDir = new File(System.getProperty("user.dir"), "log").getAbsolutePath();
        String stdoutLogFile = new File(logDir, "stdout.log").getAbsolutePath();
   
        DOMConfigurator.configure(logConfigFile);
        System.setErr(new PrintStream(new BufferedOutputStream(new FileOutputStream(stdoutLogFile)), true));
        System.setOut(new PrintStream(new BufferedOutputStream(new FileOutputStream(stdoutLogFile)), true));
    } catch (Exception e) {
        e.printStackTrace();
    }
}

Java