IDEA远程连接HBase及其Java API实战详解
开放端口
安全组没开放端口是原罪!!!导致好多bug费时费力。hbase悄悄咪咪的用了好多端口,比如被我抓到的42239,直接搜索报错药不对症。
hbase安装
下载压缩包
可以去官网下载http://hbase.apache.org/downloads.html
也可以去镜像下载历史版本http://archive.apache.org/dist/hbase/
以1.3.2版本为例:
直接下载或者下载到本地再上传都行,看你哪个快。
wget http://archive.apache.org/dist/hbase/1.3.2/hbase-1.3.2-bin.tar.gz tar -zxvf hbase-1.3.2-bin.tar.gz #解压 mv hbase-1.3.2-bin /urs/local/hbase
配置hbase-site.xml
cd /usr/local/hbase/conf vi hbase-site.xml
<property> <name>hbase.cluster.distributed</name> <value>true</value> </property> <property> <name>hbase.rootdir</name> <value>/hbase-data</value> </property> <property> <name>hbase.zookeeper.quorum</name> <value>master:2181</value> </property>
配置hbase-env.sh
cd /usr/local/hbase/conf echo $java_home #若没有安装jdk可百度(偷懒) vi hbase-env.sh #添加要一致 export java_home=/usr/local/java
运行测试
cd /usr/local/hbase/bin ./start-hbase.sh
ip:16010访问
域名配置
服务器 vi /etc/hosts
私网ip master
本地 c:\windows\system32\drivers\etc\hosts
公网ip master
idea源码
目录结构:
创建一个maven项目并在pom.xml添加依赖:
<dependency> <groupid>org.apache.hbase</groupid> <artifactid>hbase-server</artifactid> <version>1.3.2</version> </dependency> <dependency> <groupid>org.apache.hbase</groupid> <artifactid>hbase-client</artifactid> <version>1.3.2</version> </dependency>
版本是1.3.2,注意和你自己的一致,可以登录hbase shell时查看。
(
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log4j.properties配置
log4j.rootlogger=debug, stdout, r log4j.appender.stdout=org.apache.log4j.consoleappender log4j.appender.stdout.layout=org.apache.log4j.patternlayout log4j.appender.stdout.layout.conversionpattern=%5p - %m%n log4j.appender.r=org.apache.log4j.rollingfileappender log4j.appender.r.file=firestorm.log log4j.appender.r.maxfilesize=100kb log4j.appender.r.maxbackupindex=1 log4j.appender.r.layout=org.apache.log4j.patternlayout log4j.appender.r.layout.conversionpattern=%p %t %c - %m%n log4j.logger.com.codefutures=debug
hbase-site.xml配置
<?xml version="1.0"?> <?xml-stylesheet type="text/xsl" href="configuration.xsl" rel="external nofollow" ?> <configuration> <property> <name>hbase.cluster.distributed</name> <value>true</value> </property> <property> <name>hbase.rootdir</name> <value>/hbase-data</value> </property> <property> <name>hbase.zookeeper.quorum</name> <value>master:2181</value> </property> </configuration>
hbasecrud.java
package ex3; import org.apache.hadoop.conf.configuration; import org.apache.hadoop.hbase.*; import org.apache.hadoop.hbase.client.*; import java.io.ioexception; public class hbasecrud { private static configuration configuration; private static connection connection; private static admin admin; /** * 建立连接 */ public static void init(){ configuration=hbaseconfiguration.create(); configuration.set("hbase.zookeeper.quorum","121.36.240.205"); // 换成你自己的ip configuration.set("hbase.zookeeper.property.clientport","2181"); try{ connection=connectionfactory.createconnection(configuration); admin=connection.getadmin(); }catch (ioexception e){ e.printstacktrace(); } } /** * 关闭连接 */ public static void close(){ try{ if(admin!=null) admin.close(); }catch (ioexception e){ e.printstacktrace(); } } /** * 创建表 * @param mytablename 表名 * @param colfamily 列族数组 * @throws ioexception */ public static void createtable(string mytablename,string[]colfamily)throws ioexception{ tablename tablename = tablename.valueof(mytablename); if(admin.tableexists(tablename)){ system.out.println("表名已存在!"); } else{ htabledescriptor htabledescriptor = new htabledescriptor(tablename); for(string str:colfamily){ //增加一列 hcolumndescriptor hcolumndescriptor = new hcolumndescriptor(str); htabledescriptor.addfamily(hcolumndescriptor); } admin.createtable(htabledescriptor); //建表 } } /** * 添加数据 * @param tablename 表名 * @param rowkey 行键 * @param colfamily 列族 * @param col 列限定符 * @param val 数据 * @throws ioexception */ public static void insertdata(string tablename,string rowkey,string colfamily,string col,string val)throws ioexception{ table table = connection.gettable(tablename.valueof(tablename));//获取表名 put put = new put(rowkey.getbytes()); put.addcolumn(colfamily.getbytes(),col.getbytes(),val.getbytes()); table.put(put); table.close(); } /** * 获取数据 * @param tablename 表名 * @param rowkey 行键 * @param colfamily 列族 * @param col 列限定符 * @throws ioexception */ public static void getdata(string tablename,string rowkey,string colfamily,string col)throws ioexception{ table table = connection.gettable(tablename.valueof(tablename)); get get = new get(rowkey.getbytes()); get.addcolumn(colfamily.getbytes(),col.getbytes()); result result = table.get(get); string val = new string(result.getvalue(colfamily.getbytes(),col==null?null:col.getbytes())); system.out.println("值为:"+val); table.close(); } }
client.java
package ex3; import org.apache.log4j.basicconfigurator; import java.io.ioexception; public class client { public static void main(string[] args) throws ioexception { hbasecrud.init(); //建表 hbasecrud.createtable("student",new string[]{"score"}); //插入数据 hbasecrud.insertdata("student","lisa","score","java","85"); hbasecrud.insertdata("student","lisa","score","c/c++","80"); hbasecrud.insertdata("student","lisa","score","mysql","82"); hbasecrud.insertdata("student","jerry","score","java","65"); //查询数据 hbasecrud.getdata("student","lisa","score","java"); hbasecrud.getdata("student","lisa","score","mysql"); hbasecrud.getdata("student","jerry","score","java"); hbasecrud.close(); system.out.println("记得一键三连~"); } }
点击运行后需要点耐心等待,灰色info、debug信息都可不用管,报错的话会是红色字体(评论区交流),有tomcat内味了。
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