hbase的javaapi

pom.xml里添加依赖
添加依赖
<dependency>
<groupId>org.apache.hbase</groupId>
<artifactId>hbase-server</artifactId>
<version>0.98.6-hadoop2</version>
</dependency>
<dependency>
<groupId>org.apache.hbase</groupId>
<artifactId>hbase-client</artifactId>
<version>0.98.6-hadoop2</version>
</dependency>
复制hbase-site.xml到工程
拷贝hbase-site.xml到resource里面去
弄好之后右键项目 maven ->update project
然后开始码代码
代码

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package com.cniao5.mapreduce;
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import org.apache.hadoop.conf.Configuration;
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import org.apache.hadoop.hbase.Cell;
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import org.apache.hadoop.hbase.CellUtil;
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import org.apache.hadoop.hbase.HBaseConfiguration;
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import org.apache.hadoop.hbase.client.Delete;
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import org.apache.hadoop.hbase.client.Get;
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import org.apache.hadoop.hbase.client.HTable;
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import org.apache.hadoop.hbase.client.Put;
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import org.apache.hadoop.hbase.client.Result;
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import org.apache.hadoop.hbase.client.ResultScanner;
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import org.apache.hadoop.hbase.client.RetriesExhaustedWithDetailsException;
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import org.apache.hadoop.hbase.client.Scan;
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import org.apache.hadoop.hbase.util.Bytes;
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public class HBaseClient {
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public static HTable getTable(String name) throws Exception {
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//获取配置，使用HBaseConfiguration
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Configuration conf = HBaseConfiguration.create();
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//操作的表
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HTable table = new HTable(conf, name);
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return table;
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}
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public static void getData(HTable table) throws Exception {
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//实例化一个get，指定一个rowkey
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Get get = new Get(Bytes.toBytes("20180218_1325"));
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//get某列的值
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//get.addColumn(Bytes.toBytes("f1"), Bytes.toBytes("age"));
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//get一个列簇
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get.addFamily(Bytes.toBytes("f1"));
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//定义一个result
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Result rs = table.get(get);
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//打印数据
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for (Cell cell : rs.rawCells()) {
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System.out.println(
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Bytes.toString(CellUtil.cloneFamily(cell)) + " *** " + Bytes.toString(CellUtil.cloneQualifier(cell))
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+ " *** " + Bytes.toString(CellUtil.cloneValue(cell)) + " *** " + cell.getTimestamp());
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System.out.println("---------------------------------------------");
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}
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// get加载到表中
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table.get(get);
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}
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public static void putData(HTable table) throws Exception {
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Put put = new Put(Bytes.toBytes("20180218_1325"));
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put.add(Bytes.toBytes("f1"), Bytes.toBytes("sex"), Bytes.toBytes("male"));
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table.put(put);
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getData(table);
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}
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public static void deleteData(HTable table) throws Exception {
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Delete del = new Delete(Bytes.toBytes("20180218_1325"));
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del.deleteColumns(Bytes.toBytes("f1"), Bytes.toBytes("sex"));
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table.delete(del);
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getData(table);
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}
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public static void scanData(HTable table) throws Exception {
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Scan scan = new Scan();
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ResultScanner rsscan = table.getScanner(scan);
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for (Result rs : rsscan) {
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System.out.println(Bytes.toString(rs.getRow()));
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for (Cell cell : rs.rawCells()) {
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System.out.println(Bytes.toString(CellUtil.cloneFamily(cell)) + " *** "
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+ Bytes.toString(CellUtil.cloneQualifier(cell)) + " *** "
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+ Bytes.toString(CellUtil.cloneValue(cell)) + " *** " + cell.getTimestamp());
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}
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System.out.println("---------------------------------------------");
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}
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}
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public static void rangeData(HTable table) throws Exception {
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Scan scan = new Scan();
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// conf the scan
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//scan.addColumn(Bytes.toBytes("f1"), Bytes.toBytes("name"));
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scan.setStartRow(Bytes.toBytes("20180218_1325"));
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scan.setStopRow(Bytes.toBytes("20180218_1328"));
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ResultScanner rsscan = table.getScanner(scan);
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for (Result rs : rsscan) {
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System.out.println(Bytes.toString(rs.getRow()));
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for (Cell cell : rs.rawCells()) {
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System.out.println(Bytes.toString(CellUtil.cloneFamily(cell)) + " *** "
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+ Bytes.toString(CellUtil.cloneQualifier(cell)) + " *** "
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+ Bytes.toString(CellUtil.cloneValue(cell)) + " *** " + cell.getTimestamp());
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}
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System.out.println("---------------------------------------------");
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}
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}
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public static void main(String[] args) throws Exception {
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HTable table = getTable("ns1:t1");
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//查询数据
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//getData(table);
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//添加数据
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//putData(table);
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//删除数据
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//deleteData(table);
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//scan数据
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//scanData(table);
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//scan范围查看
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rangeData(table);
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}
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}
完了之后打成jar包 去运行