有一个文件，正常数据有3个字段（否则为异常数据），'\t'作为分隔符，请补充代码实现一个计数器，用以统计异常数据的条数。异常数据位2条（Tom和Lily）Jim 1 28， Kate 0 26， Tom 1， Lily 0 29 22。public class Counters{public static class MyCounterMapper extends Mapper<LongWritable,Text,Text,Text>{public void map(LongWritable key,Text value,Context context)throws IOException{String line_words=value.toString().split('\t');//请在下方补充代码 }}}}

public static enum CountersEnum {
NUM_OF_INVALID_RECORDS
}

public static class MyCounterMapper extends Mapper<LongWritable, Text, Text, Text> {
public void map(LongWritable key, Text value, Context context) throws IOException, InterruptedException {
String[] fields = value.toString().split("\t");
if (fields.length != 3) {
context.getCounter(CountersEnum.NUM_OF_INVALID_RECORDS).increment(1);
}
}
}