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实现利用zookeeper利用java api删除节点忽略版本号?如何使用Java API操作Hbase

admin admin 发表于2022-07-17 15:10:52 浏览80 评论0

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很少有API接口可以免费使用,云静脉OCR OCR SDK开发人员平台提供脸部识别API接口,并且关于面部识别API接口,注册并登录自help下载人的面部识别API接口文档...,可以直接使用// 其它两种定义方式func NewBuffer(buf byte) *Bufferfunc NewBufferString(s string) *Buffer如何使用Java API操作Hbasejava API草错hbase举例如下:例如输出表“users”的列族名称import java.io.IOException;import org.apache.hadoop.conf.Configuration;import org.apache.hadoop.hbase.HBaseConfiguration;import org.apache.hadoop.hbase.HColumnDescriptor;import org.apache.hadoop.hbase.HTableDescriptor;import org.apache.hadoop.hbase.client.HBaseAdmin;import org.apache.hadoop.hbase.util.Bytes;public class ExampleClient { public static void main(String args) throws IOException { Configuration conf = HBaseConfiguration.create(); conf.set(“hbase.zookeeper.quorum“, “master“);//使用eclipse时必须添加这个,否则无法定位 conf.set(“hbase.zookeeper.property.clientPort“, “2181“); HBaseAdmin admin = new HBaseAdmin(conf);// 新建一个数据库管理员 HTableDescriptor tableDescriptor = admin.getTableDescriptor(Bytes.toBytes(“users“)); byte name = tableDescriptor.getName(); System.out.println(“result:“); System.out.println(“table name: “+ new String(name)); HColumnDescriptor columnFamilies = tableDescriptor .getColumnFamilies(); for(HColumnDescriptor d : columnFamilies){ System.out.println(“column Families: “+ d.getNameAsString()); } }}输出结果:2013-09-09 15:58:51,890 WARN conf.Configuration (Configuration.java:《clinit》(195)) - DEPRECATED: hadoop-site.xml found in the classpath. Usage of hadoop-site.xml is deprecated. Instead use core-site.xml, mapred-site.xml and hdfs-site.xml to override properties of core-default.xml, mapred-default.xml and hdfs-default.xml respectively2013-09-09 15:58:55,031 INFO zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:zookeeper.version=3.4.5-1392090, built on 09/30/2012 17:52 GMT2013-09-09 15:58:55,031 INFO zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:host.name=w253245.ppp.asahi-net.or.jp2013-09-09 15:58:55,031 INFO zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:java.version=1.6.0_10-rc22013-09-09 15:58:55,031 INFO zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:java.vendor=Sun Microsystems Inc.2013-09-09 15:58:55,031 INFO zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:java.home=C:\Java\jre62013-09-09 15:58:55,031 INFO zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:java.class.path2013-09-09 15:58:55,031 INFO zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:java.library.path=D:\workspace\Eclipse-jee\hadoop-1.1.21\lib\native;D:\workspace\Eclipse-jee\hadoop-1.1.21\lib\native2013-09-09 15:58:55,031 INFO zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:java.io.tmpdir=C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\2013-09-09 15:58:55,031 INFO zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:java.compiler=《NA》2013-09-09 15:58:55,031 INFO zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:os.name=Windows XP2013-09-09 15:58:55,031 INFO zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:os.arch=x862013-09-09 15:58:55,031 INFO zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:os.version=5.12013-09-09 15:58:55,031 INFO zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:user.name=hadoop2013-09-09 15:58:55,031 INFO zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:user.home=C:\Documents and Settings\Administrator2013-09-09 15:58:55,031 INFO zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:user.dir=D:\workspace\Eclipse-jee\Hadoop_APPs_U_tht2013-09-09 15:58:55,031 INFO zookeeper.ZooKeeper (ZooKeeper.java:《init》(438)) - Initiating client connection, connectString=master:2181 sessionTimeout=180000 watcher=hconnection2013-09-09 15:58:56,171 INFO zookeeper.RecoverableZooKeeper (RecoverableZooKeeper.java:《init》(104)) - The identifier of this process is 6032@tht2013-09-09 15:58:56,234 INFO zookeeper.ClientCnxn (ClientCnxn.java:logStartConnect(966)) - Opening socket connection to server master/121.1.253.251:2181. Will not attempt to authenticate using SASL (无法定位登录配置)2013-09-09 15:58:56,296 INFO zookeeper.ClientCnxn (ClientCnxn.java:primeConnection(849)) - Socket connection established to master/121.1.253.251:2181, initiating session2013-09-09 15:58:56,484 INFO zookeeper.ClientCnxn (ClientCnxn.java:onConnected(1207)) - Session establishment complete on server master/121.1.253.251:2181, sessionid = 0x141011ad7db000e, negotiated timeout = 180000result:table name: userscolumn Families: addresscolumn Families: infocolumn Families: user_id如何免费使用人脸识别 API 接口实际上,而不用初始化b.Writer(byte(“Hello “)) // 可以直接使用b1 := new(bytes.Buffer) //直接使用 new 初始化,实现利用zookeeper利用java api删除节点忽略版本号var b bytes.Buffer //直接定义一个 Buffer 变量。

实现利用zookeeper利用java api删除节点忽略版本号


var b bytes.Buffer //直接定义一个 Buffer 变量,而不用初始化
b.Writer(byte(“Hello “)) // 可以直接使用
b1 := new(bytes.Buffer) //直接使用 new 初始化,可以直接使用
// 其它两种定义方式
func NewBuffer(buf byte) *Buffer
func NewBufferString(s string) *Buffer

如何使用Java API操作Hbase


java API草错hbase举例如下:
例如输出表“users”的列族名称
import java.io.IOException;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.HColumnDescriptor;
import org.apache.hadoop.hbase.HTableDescriptor;
import org.apache.hadoop.hbase.client.HBaseAdmin;
import org.apache.hadoop.hbase.util.Bytes;
public class ExampleClient {
public static void main(String args) throws IOException {

Configuration conf = HBaseConfiguration.create();
conf.set(“hbase.zookeeper.quorum“, “master“);//使用eclipse时必须添加这个,否则无法定位
conf.set(“hbase.zookeeper.property.clientPort“, “2181“);
HBaseAdmin admin = new HBaseAdmin(conf);// 新建一个数据库管理员
HTableDescriptor tableDescriptor = admin.getTableDescriptor(Bytes.toBytes(“users“));
byte name = tableDescriptor.getName();
System.out.println(“result:“);
System.out.println(“table name: “+ new String(name));
HColumnDescriptor columnFamilies = tableDescriptor
.getColumnFamilies();
for(HColumnDescriptor d : columnFamilies){
System.out.println(“column Families: “+ d.getNameAsString());
}
}
}
输出结果:
2013-09-09 15:58:51,890 WARN conf.Configuration (Configuration.java:《clinit》(195)) - DEPRECATED: hadoop-site.xml found in the classpath. Usage of hadoop-site.xml is deprecated. Instead use core-site.xml, mapred-site.xml and hdfs-site.xml to override properties of core-default.xml, mapred-default.xml and hdfs-default.xml respectively
2013-09-09 15:58:55,031 INFO zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:zookeeper.version=3.4.5-1392090, built on 09/30/2012 17:52 GMT
2013-09-09 15:58:55,031 INFO zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:host.name=w253245.ppp.asahi-net.or.jp
2013-09-09 15:58:55,031 INFO zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:java.version=1.6.0_10-rc2
2013-09-09 15:58:55,031 INFO zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:java.vendor=Sun Microsystems Inc.
2013-09-09 15:58:55,031 INFO zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:java.home=C:\Java\jre6
2013-09-09 15:58:55,031 INFO zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:java.class.path
2013-09-09 15:58:55,031 INFO zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:java.library.path=D:\workspace\Eclipse-jee\hadoop-1.1.21\lib\native;D:\workspace\Eclipse-jee\hadoop-1.1.21\lib\native
2013-09-09 15:58:55,031 INFO zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:java.io.tmpdir=C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\
2013-09-09 15:58:55,031 INFO zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:java.compiler=《NA》
2013-09-09 15:58:55,031 INFO zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:os.name=Windows XP
2013-09-09 15:58:55,031 INFO zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:os.arch=x86
2013-09-09 15:58:55,031 INFO zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:os.version=5.1
2013-09-09 15:58:55,031 INFO zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:user.name=hadoop
2013-09-09 15:58:55,031 INFO zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:user.home=C:\Documents and Settings\Administrator
2013-09-09 15:58:55,031 INFO zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:user.dir=D:\workspace\Eclipse-jee\Hadoop_APPs_U_tht
2013-09-09 15:58:55,031 INFO zookeeper.ZooKeeper (ZooKeeper.java:《init》(438)) - Initiating client connection, connectString=master:2181 sessionTimeout=180000 watcher=hconnection
2013-09-09 15:58:56,171 INFO zookeeper.RecoverableZooKeeper (RecoverableZooKeeper.java:《init》(104)) - The identifier of this process is 6032@tht
2013-09-09 15:58:56,234 INFO zookeeper.ClientCnxn (ClientCnxn.java:logStartConnect(966)) - Opening socket connection to server master/121.1.253.251:2181. Will not attempt to authenticate using SASL (无法定位登录配置)
2013-09-09 15:58:56,296 INFO zookeeper.ClientCnxn (ClientCnxn.java:primeConnection(849)) - Socket connection established to master/121.1.253.251:2181, initiating session
2013-09-09 15:58:56,484 INFO zookeeper.ClientCnxn (ClientCnxn.java:onConnected(1207)) - Session establishment complete on server master/121.1.253.251:2181, sessionid = 0x141011ad7db000e, negotiated timeout = 180000
result:
table name: users
column Families: address
column Families: info
column Families: user_id

如何免费使用人脸识别 API 接口

实际上,很少有API接口可以免费使用,并且关于面部识别API接口,云静脉OCR OCR SDK开发人员平台提供脸部识别API接口,注册并登录自help下载人的面部识别API接口文档...