HBase0.96.x开发使用（三）-- java客户端使用
1、 创建maven项目，将下面配置加入pom.xml
<dependencies> <dependency> <artifactId>slf4j-log4j12</artifactId> <groupId>org.slf4j</groupId> <version>1.7.5</version> </dependency> <dependency> <groupId>org.hbase</groupId> <artifactId>asynchbase</artifactId> <version>1.4.1</version> <exclusions> <exclusion> <artifactId>log4j-over-slf4j</artifactId> <groupId>org.slf4j</groupId> </exclusion> </exclusions> </dependency> <dependency> <groupId>commons-configuration</groupId> <artifactId>commons-configuration</artifactId> <version>1.8</version> </dependency> <dependency> <groupId>commons-lang</groupId> <artifactId>commons-lang</artifactId> <version>2.6</version> </dependency> <dependency> <groupId>commons-logging</groupId> <artifactId>commons-logging</artifactId> <version>1.1.3</version> </dependency> <dependency> <groupId>org.apache.hadoop</groupId> <artifactId>hadoop-core</artifactId> <version>1.2.1</version> </dependency> <dependency> <groupId>org.apache.hbase</groupId> <artifactId>hbase-common</artifactId> <version>0.96.0-hadoop1</version> </dependency> <dependency> <groupId>org.apache.hbase</groupId> <artifactId>hbase-client</artifactId> <version>0.96.0-hadoop1</version> </dependency> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>1.2.17</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>1.7.5</version> </dependency> <dependency> <groupId>org.apache.zookeeper</groupId> <artifactId>zookeeper</artifactId> <version>3.4.5</version> <exclusions> <exclusion> <artifactId>slf4j-log4j12</artifactId> <groupId>org.slf4j</groupId> </exclusion> </exclusions> </dependency> </dependencies>
2、 创建hbase-site.xml文件，添加以下内容：
<?xml version="1.0"?> <?xml-stylesheet type="text/xsl" href="configuration.xsl"?> <configuration> <property> <name>hbase.zookeeper.quorum</name> <value>hadoop234</value> </property> </configuration>
注意：本地需要配置host访问hadoop234
3、Java测试代码：
package hbase;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.NavigableMap;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.Cell;
import org.apache.hadoop.hbase.CellUtil;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.HColumnDescriptor;
import org.apache.hadoop.hbase.HRegionInfo;
import org.apache.hadoop.hbase.HTableDescriptor;
import org.apache.hadoop.hbase.MasterNotRunningException;
import org.apache.hadoop.hbase.ServerName;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.ZooKeeperConnectionException;
import org.apache.hadoop.hbase.client.Delete;
import org.apache.hadoop.hbase.client.Get;
import org.apache.hadoop.hbase.client.HBaseAdmin;
import org.apache.hadoop.hbase.client.HConnection;
import org.apache.hadoop.hbase.client.HConnectionManager;
import org.apache.hadoop.hbase.client.HTable;
import org.apache.hadoop.hbase.client.Increment;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.client.Result;
import org.apache.hadoop.hbase.client.ResultScanner;
import org.apache.hadoop.hbase.client.Scan;
import org.apache.hadoop.hbase.filter.BinaryComparator;
import org.apache.hadoop.hbase.filter.CompareFilter.CompareOp;
import org.apache.hadoop.hbase.filter.Filter;
import org.apache.hadoop.hbase.filter.RowFilter;
import org.apache.hadoop.hbase.util.Bytes;
/**
*
*
* @author whatlly
*/
public class HBaseTest {
private static Configuration conf = null;
/**
* 初始化配置
*/
static {
conf = HBaseConfiguration.create();
}
public static void main(String[] args) throws Exception {
}
/**
* 创建表操作
*
* @throws IOException
*/
public void createTable(String tablename, String[] cfs) throws IOException {
HBaseAdmin admin = new HBaseAdmin(conf);
if (admin.tableExists(tablename)) {
System.out.println("表已经存在！");
} else {
HTableDescriptor tableDesc = new HTableDescriptor(TableName.valueOf(tablename));
for (int i = 0; i < cfs.length; i++) {
tableDesc.addFamily(new HColumnDescriptor(cfs[i]));
}
admin.createTable(tableDesc);
admin.close();
System.out.println("表创建成功！");
}
}
/**
* 删除表操作
*
* @param tablename
* @throws IOException
*/
public void deleteTable(String tablename) throws IOException {
try {
HBaseAdmin admin = new HBaseAdmin(conf);
if (admin.tableExists(tablename)) {
admin.disableTable(tablename);
admin.deleteTable(tablename);
System.out.println("表删除成功！");
} else {
System.out.println("表不存在");
}
admin.close();
} catch (MasterNotRunningException e) {
e.printStackTrace();
} catch (ZooKeeperConnectionException e) {
e.printStackTrace();
}
}
/**
* 插入一行记录
*
* @param tablename
* @param cfs
*/
public void writeRow(String tablename, String[] cfs) {
try {
HTable table = new HTable(conf, tablename);
Put put = new Put(Bytes.toBytes("row1"));
for (int j = 0; j < cfs.length; j++) {
put.add(Bytes.toBytes(cfs[j]), Bytes.toBytes(String.valueOf(1)), Bytes.toBytes("value_1"));
table.put(put);
}
table.close();
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* 删除一行记录
*
* @param tablename
* @param rowkey
* @throws IOException
*/
@SuppressWarnings({ "unchecked", "rawtypes" })
public void deleteRow(String tablename, String rowkey) throws IOException {
HTable table = new HTable(conf, tablename);
List list = new ArrayList();
Delete d1 = new Delete(rowkey.getBytes());
list.add(d1);
table.delete(list);
table.close();
System.out.println("删除行成功！");
}
/**
* 查找一行记录
*
* @param tablename
* @param rowkey
*/
public void selectRow(String tablename, String rowKey) throws IOException {
HTable table = new HTable(conf, tablename);
Get g = new Get(Bytes.toBytes(rowKey));
Result rs = table.get(g);
System.out.println(rs);
table.close();
}
/**
* 查询表中所有行
*
* @param tablename
*/
public void scaner(String tablename) {
try {
HTable table = new HTable(conf, tablename);
Scan s = new Scan();
ResultScanner rs = table.getScanner(s);
for (Result r : rs) {
System.out.println(r);
}
table.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
原文出处： my.oschina.net/u/158197/blog/189272 （原创文章，转载请注明出处）