HBase 6, using the Phoenix Java API to manipulate hbase

Preparation of the development environment:eclipse3.5,jdk1.7,window8,hadoop2.2.0 , hbase0.98.0.2 , phoenix4.3.0

1. Copy the following files from the cluster:core-site.xml,hbase-site.xml,hdfs-site.xml files are put into the project src under

2, the Phoenix-4.3.0-client.jar and phoenix-core-4.3.0.jar of Phoenix Add to Project Classpath

3. Configure the hosts file for each node in the cluster to add the client's hostname:IP

4. Join the hostname and IP of the cluster in the client host file

5. Engineering

　　　

　Example 1:

Import Java.sql.connection;import java.sql.drivermanager;import java.sql.resultset;import java.sql.Statement;  public class Phoenix_test {/** * uses the APIs provided by Phoenix to manipulate hbase to read data */public static void Main (string[] args) throws Throwable {try {//The drive below is used for the old version of Phoenix using 2.11, corresponding to hbase0.94+//class.forname ("Com.salesforce.phoenix.jdbc.PhoenixDriver");// phoenix4.3 with the following driver corresponding to Hbase0.98+class.forname ("Org.apache.phoenix.jdbc.PhoenixDriver");} catch (Exception e) {e.printstacktrace ();} This configures the address of the zookeeper, which can be single or multiple. Can be a domain name or ipstring url = "Jdbc:phoenix:node5,node6,node7";//String URL =//"jdbc:phoenix:41.byzoro.com,42.byzoro.com, 43.byzoro.com:2181 "; Connection conn = drivermanager.getconnection (URL); Statement Statement = Conn.createstatement (); String sql = "SELECT COUNT (1) as Num from Web_stat"; long time = System.currenttimemillis (); ResultSet rs = statement.executequery (sql), while (Rs.next ()) {int count = rs.getint ("num"); System.out.println ("Row count is" + count);} Long timeused = System.currenttimemillis ()-TimE System.out.println ("Time" + timeused + "mm");//close connection rs.close (); Statement.close (); Conn.close ();}}

Execution Result:

　　

　　Example 2:

Import Java.sql.connection;import java.sql.drivermanager;import java.sql.resultset;import java.sql.Statement; public class Phoenix_test2 {/** * uses the API operation provided by Phoenix to read data in HBase */public static void Main (string[] args) throws Throwable {T ry {///the drive below is used for the old version of Phoenix 2.11, corresponding to Hbase0.94+//class.forname ("Com.salesforce.phoenix.jdbc.PhoenixDriver");// phoenix4.3 with the following driver corresponding to Hbase0.98+class.forname ("Org.apache.phoenix.jdbc.PhoenixDriver");} catch (Exception e) {e.printstacktrace ();} Here the address of ZK is configured, can be single, or multiple. Can be a domain name or ipstring url = "Jdbc:phoenix:node5,node6,node7"; Connection conn = drivermanager.getconnection (URL); Statement Statement = Conn.createstatement (); String sql = "SELECT * from Web_stat where core = 1"; Long time = System.currenttimemillis (); ResultSet rs = statement.executequery (sql); while (Rs.next ()) {//Get core field value int core = Rs.getint ("core");// Gets the core field value string host = Rs.getstring ("host");//Gets the Domain field value string domain = rs.getstring ("domain");//Gets the feature field value string Feature = rs.getstring ("feature");//Gets the Date field value, in the databasefield is the date type, where the code is automatically converted to a string of type string date = rs.getstring ("date");//Gets the DB fields value string db = Rs.getstring ("db"); System.out.println ("Host:" +host+ "\tdomain:" +domain+ "\tfeature:" +feature+ "\tdate:" +date+ "\tcore:" + core+ "\tdb:" + db);} Long timeused = System.currenttimemillis ()-time; System.out.println ("Time" + timeused + "mm");//close connection rs.close (); Statement.close (); Conn.close ();}}

　　Execution Result:

　　

HBase 6, using the Phoenix Java API to manipulate hbase