MapReduce调试，通过计数器输出变量值到控制台显示

public void map(ImmutableBytesWritable key, Result values,
Context context) throws IOException, InterruptedException {

//这里通过values 获取各个版本的值
for (KeyValue kv : values.list()) {
String qualifier = new String(Bytes.toString(kv.getQualifier()));
String val = new String(Bytes.toString(kv.getValue()));
keycid.set(val+qualifier);

//这里通过计数器输出变量值
Counter countPrint1 = context.getCounter("Map++++keycid", keycid.toString());

//这里将计数器加一，也就是变量输出的次数增加了1次
countPrint1.increment(1l);
context.write(keycid, ONE);

}
}