我是Hadoop框架的新手.我试图编写一个从hdfs读取XML文件的程序,使用JDOM解析它并将其发送到数据库.以下是Java文件
package JDOMprs;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.conf.Configured;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.DoubleWritable;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.Mapper;
import org.apache.hadoop.mapreduce.Reducer;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.util.Tool;
import org.apache.hadoop.util.ToolRunner;
import org.jdom2.Document;
import org.jdom2.Element;
import org.jdom2.JDOMException;
import org.jdom2.input.SAXBuilder;
import com.vertica.hadoop.VerticaOutputFormat;
import com.vertica.hadoop.VerticaRecord;
public class ExampleParser extends Configured implements Tool {
public static class Map extends Mapper<LongWritable, Text, Text, DoubleWritable> {
private final static DoubleWritable one = new DoubleWritable(1);
private Text word = new Text();
private List mylist; …我最近开始学习Java中Hadoop map-reduce编程的基础知识.到目前为止,我发现的唯一方法是使用vi或emacs将代码写入文件中,这看起来很糟糕,原始且非常痛苦.
是否有用于编写,编译和运行Hadoop程序的IDE？