日志如何打印异常堆栈信息。

package com.doctor.slf4j;

import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * 如何打印异常堆栈信息。
 * @author doctor
 *
 * @time   2014年12月11日 上午9:49:00
 */
public class LogThrowableRule {
private final Logger log = LoggerFactory.getLogger(getClass());

/**
 * 这种e.toString()方法只是得到异常信息，异常堆栈没有得到
 */
@Test
public void test_wrongLogThrowable(){
try {
int test = 10/0;
} catch (Exception e) {
log.error("error" + e);
//main  ERROR c.d.s.LogThrowableRule -
//                         errorjava.lang.ArithmeticException: / by zero
}
}

/**
 * 得到异常堆栈信息正确的log方法
 */
@Test
public void test_rightWayGetInfoForThrowable(){
int a = 10;
int b = 0;
try {

int test = a/b;
} catch (Exception e) {
log.error("error" ,e);
//main  ERROR c.d.s.LogThrowableRule -
//error
//java.lang.ArithmeticException: / by zero
//          at com.doctor.slf4j.LogThrowableRule.test_rightWayGetInfoForThrowable(LogThrowableRule.java:35) ~[classes/:na]
//          at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_11]
//          .............

String msg = String.format("{error:'%s/%s'}", a,b);//string带参数，利用String.format
log.error(msg, e);
}
}
}