有时候，一些框架提供了日志输出，但是需要我们制定输出流，才会帮我们打印，下面讲解一下如何获取log4j的输出流
spring boot下
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新建以下类
import java.io.OutputStream; import org.slf4j.Logger; public class LogOutputStream extends OutputStream { private final Logger logger; /** The internal memory for the written bytes. */ private StringBuffer mem; public LogOutputStream( final Logger logger ) { this.logger = logger; mem = new StringBuffer(); } @Override public void write( final int b ) { if ( (char) b == '\n' ) { flush(); return; } mem = mem.append( (char) b ); } @Override public void flush() { logger.info( mem.toString() ); mem = new StringBuffer(); } } -
获取输出流
private org.slf4j.Logger log = org.slf4j.LoggerFactory.getLogger(Test.class) // log可以新建也可以使用注解 new LogOutputStream(log);
