printStackTrace&getMessage

朱雀 2022-03-18 02:36 119阅读 0赞

package com.ly.test.fql;
    
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    
    public class TestPrintStackTrace {
        private static final Logger LOG = LoggerFactory.getLogger(TestPrintStackTrace.class);
        public static void main(String[] args) {
            try {
                String[] data = new String[] {"aaaa", "bbbb"};
                data[3] = "IndexOutOfBounds";
            } catch (Exception e) {
                LOG.info("==========================");
                LOG.info("e.printStackTrace(): info ", e);
                LOG.info("==========================");
                LOG.info("e.getMessage(): " + e.getMessage());
                LOG.info("==========================");
                LOG.info("e.getLocalizedMessage(): " + e.getLocalizedMessage());
                LOG.info("==========================");
                LOG.info("e.toString(): " + e.toString());
                LOG.info("===========e.printStackTrace()===============");
                e.printStackTrace();
            }
        }
    }

运行

21:20:25.483 [main] INFO com.ly.test.TestPrintStackTrace - ==========================
    21:20:25.483 [main] INFO com.ly.test.TestPrintStackTrace - e.printStackTrace(): info 
    java.lang.ArrayIndexOutOfBoundsException: 3
    	at com.ly.test.TestPrintStackTrace.main(TestPrintStackTrace.java:11)
    21:20:25.483 [main] INFO com.ly.test.TestPrintStackTrace - ==========================
    21:20:25.483 [main] INFO com.ly.test.TestPrintStackTrace - e.getMessage(): 3
    21:20:25.483 [main] INFO com.ly.test.TestPrintStackTrace - ==========================
    21:20:25.483 [main] INFO com.ly.test.TestPrintStackTrace - e.getLocalizedMessage(): 3
    21:20:25.483 [main] INFO com.ly.test.TestPrintStackTrace - ==========================
    21:20:25.483 [main] INFO com.ly.test.TestPrintStackTrace - e.toString(): java.lang.ArrayIndexOutOfBoundsException: 3
    21:20:25.483 [main] INFO com.ly.test.TestPrintStackTrace - ===========e.printStackTrace()===============
    java.lang.ArrayIndexOutOfBoundsException: 3
    	at com.ly.test.TestPrintStackTrace.main(TestPrintStackTrace.java:11)

RunTimeException

**正确的方式：**

log.xxx("",e)

ByteArrayOutputStream baos = new ByteArrayOutputStream();
            PrintStream ps = new PrintStream(baos);
            e.printStackTrace(ps);
            return new String(baos.toByteArray(), StandardCharsets.UTF_8);

printStackTrace&getMessage

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