Hadoop2.6.0中InputFormat和OutputFormat的用法示例
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java.lang.Object org.apache.hadoop.mapreduce.InputFormatorg.apache.hadoop.mapreduce.lib.db.DBInputFormat DataDrivenDBInputFormat OracleDataDrivenDBInputFormat org.apache.hadoop.mapreduce.lib.input.FileInputFormat CombineFileInputFormat CombineSequenceFileInputFormat CombineTextInputFormat FixedLengthInputFormat KeyValueTextInputFormat NLineInputFormat SequenceFileInputFormat TextInputFormat
InputFormat
public abstract class InputFormat{ public abstract List getSplits(JobContext context) throws IOException, InterruptedException; public abstract RecordReader createRecordReader(InputSplit split,TaskAttemptContext context) throws IOException, InterruptedException; }
1、FileInputFormat
1.1 TextInputFormat
1.2 KeyValueTextInputFormat
1.3 SequenceFileInputFormat
1.4 CombineFileInputFormat
1.5 FixedLengthInputFormat
1.6 NLineInputFormat
2、DBInputFormat
2.1 DataDrivenDBInputFormat
2.1.1 OracleDataDrivenDBInputFormat
OutputFormat
public abstract class OutputFormat{ public abstract RecordWriter getRecordWriter(TaskAttemptContext context ) throws IOException, InterruptedException; public abstract RecordWriter getRecordWriter(TaskAttemptContext context ) throws IOException, InterruptedException; public abstract OutputCommitter getOutputCommitter(TaskAttemptContext context ) throws IOException, InterruptedException; }
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