1、将debug级别和error级别分别输出到文件
log4j.rootLogger=info,console,file1,file2
log4j.appender.console=org.apache.log4j.ConsoleAppenderlog4j.appender.console.layout=org.apache.log4j.PatternLayout
log4j.appender.console.layout.ConversionPattern=%-d{yyyy-MM-dd HH\:mm\:ss} %-5p [%l][%t] - %m%n
log4j.appender.file1=org.apache.log4j.DailyRollingFileAppender
log4j.appender.file1.File= ../logs/log4j_debug
log4j.appender.file1.MaxFileSize=10MB
log4j.appender.file1.DatePattern='_'yyyy-MM-dd'.out'
log4j.appender.file1.Threshold=DEBUG
log4j.appender.file1.layout=org.apache.log4j.PatternLayout
log4j.appender.file1.layout.ConversionPattern=%-d{yyyy-MM-dd HH\:mm\:ss} %-5p [%l][%t] - %m%n
log4j.appender.file2=org.apache.log4j.DailyRollingFileAppender
log4j.appender.file2.File= ../logs/log4j_error
log4j.appender.file2.DatePattern='_'yyyy-MM-dd'.out'
log4j.appender.file2.Threshold=ERROR
log4j.appender.file2.layout=org.apache.log4j.PatternLayout
log4j.appender.file2.layout.ConversionPattern=%-d{yyyy-MM-dd HH\:mm\:ss} %-5p [%l][%t] - %m%n
2、将system.out输出到文件(默认和debug放在一个文件下)
1)创建监听类,将system.out监听转到log4j下
public class StdoutListener implements ServletContextListener {
public void contextDestroyed(ServletContextEvent event) {
}
private void log(Object info) {
LogFactoryImpl.getLog(getClass()).info(info);
}
public void contextInitialized(ServletContextEvent event) {
PrintStream printStream = new PrintStream(System.out) {
public void println(boolean x) {
log(Boolean.valueOf(x));
System.err.println(Boolean.valueOf(x));
}
public void println(char x) {
log(Character.valueOf(x));
System.err.println(Character.valueOf(x));
}
public void println(char[] x) {
log(x == null ? null : new String(x));
System.err.println(x == null ? null : new String(x));
}
public void println(double x) {
log(Double.valueOf(x));
System.err.println(Double.valueOf(x));
}
public void println(float x) {
log(Float.valueOf(x));
System.err.println(Float.valueOf(x));
}
public void println(int x) {
log(Integer.valueOf(x));
System.err.println(Integer.valueOf(x));
}
public void println(long x) {
log(x);
System.err.println(x);
}
public void println(Object x) {
log(x);
System.err.println(x);
}
public void println(String x) {
log(x);
System.err.println(x);
}
};
System.setOut(printStream);
// System.setErr(printStream);
}
}
2) <!-- 注入log4j监听器,用于将system.out打印到日志文件下 -->
<listener>
<listener-class>com.fxy.yunyou.console.listener.StdoutListener</listener-class>
</listener>