spring代码异常捕获到logback logging.config=logback-spring.xml文件中不能输出异常e.printStackTrace

在spring中使用logging.config=logback-spring.xml将日志转存到了文件中。但是代码中的捕获的异常无法用 e.printStackTrace 打印到文件中。使用如下方法打印：

main:

catch(Exception e){

log.error("xxx",e);

}

这里可以重新定向 system.out 和err的输出，到logback：
https://stackoverflow.com/questions/1200175/log4j-redirect-stdout-to-dailyrollingfileappender

用于捕获运行时异常。

package com.italktv.platform.audioDist;

import java.io.IOException;

import java.io.OutputStream;

import java.io.PrintStream;

import org.apache.log4j.Level;

import org.apache.log4j.Logger;

public class Log4jStdOutErrProxy {

    public static void bind() {

        bind(Logger.getLogger("STDOUT"), Logger.getLogger("STDERR"));

    }

    @SuppressWarnings("resource")

    public static void bind(Logger loggerOut, Logger loggerErr) {

//            System.setOut(new PrintStream(new LoggerStream(loggerOut, Level.INFO,  System.out), true));

        System.setErr(new PrintStream(new LoggerStream(loggerErr, Level.ERROR, System.err), true));

    }

    private static class LoggerStream extends OutputStream {

        private final Logger logger;

        private final Level logLevel;

        private final OutputStream outputStream;

        private StringBuilder sbBuffer;

        public LoggerStream(Logger logger, Level logLevel, OutputStream outputStream) {

            this.logger = logger;

            this.logLevel = logLevel;

            this.outputStream = outputStream;

            sbBuffer = new StringBuilder();

        }

        @Override

        public void write(byte[] b) throws IOException {

            doWrite(new String(b));

        }

        @Override

        public void write(byte[] b, int off, int len) throws IOException {

            doWrite(new String(b, off, len));

        }

        @Override

        public void write(int b) throws IOException {

            doWrite(String.valueOf((char) b));

        }

        private void doWrite(String str) throws IOException {

            sbBuffer.append(str);

            if (sbBuffer.charAt(sbBuffer.length() - 1) == '\n') {

                // The output is ready

                sbBuffer.setLength(sbBuffer.length() - 1); // remove '\n'

                if (sbBuffer.charAt(sbBuffer.length() - 1) == '\r') {

                    sbBuffer.setLength(sbBuffer.length() - 1); // remove '\r'

                }

                String buf = sbBuffer.toString();

                sbBuffer.setLength(0);

                outputStream.write(buf.getBytes());

                outputStream.write('\n');

                logger.log(logLevel, buf);

            }

        }

    } // inner class LoggerStream

}

初始化时调用:

// initialize logging to go to rolling log file
LogManager.resetConfiguration();

// and output on the original stdout
System.out.println("Hello on old stdout");
Log4jStdOutErrProxy.bind();