在集群中Java 通过调用API操作HBase

本文的内容是在集群中创建java项目调用api来操作hbase，主要涉及对hbase的创建表格，删除表格，插入数据，删除数据，查询一条数据，查询所有数据等操作。

具体流程如下：

1.创建项目
2.获取jar包到项目的lib目录下（这边试用的事hbase 0.98 lib目录下的所有jar包）
3.编写java程序
4.编写ant脚本

 

 

1. package com.wan.hbase;
2. import java.io.IOException;
3. import org.apache.Hadoop.conf.Configuration;
4. import org.apache.hadoop.hbase.Cell;
5. import org.apache.hadoop.hbase.CellUtil;
6. import org.apache.hadoop.hbase.HBaseConfiguration;
7. import org.apache.hadoop.hbase.HColumnDescriptor;
8. import org.apache.hadoop.hbase.HTableDescriptor;
9. import org.apache.hadoop.hbase.MasterNotRunningException;
10. import org.apache.hadoop.hbase.TableName;
11. import org.apache.hadoop.hbase.ZooKeeperConnectionException;
12. import org.apache.hadoop.hbase.client.Delete;
13. import org.apache.hadoop.hbase.client.Get;
14. import org.apache.hadoop.hbase.client.HBaseAdmin;
15. import org.apache.hadoop.hbase.client.HTable;
16. import org.apache.hadoop.hbase.client.Put;
17. import org.apache.hadoop.hbase.client.Result;
18. import org.apache.hadoop.hbase.client.ResultScanner;
19. import org.apache.hadoop.hbase.client.Scan;
20. import org.apache.hadoop.hbase.util.Bytes;
22. public class SimpleHBase {
23. public static void main(String[] args) {
24.   Configuration configuration=HBaseConfiguration.create();
25.   String tableName="student";
26.   createTable(configuration, tableName);
27. //  addData(configuration, tableName);
28. //  getData(configuration, tableName);
29. //  getAllData(configuration, tableName);
30. //  deleteDate(configuration, tableName);
31. //  dropTable(configuration, tableName);
32.   
33. }
36. public static void createTable(Configuration configuration,String tableName){
37.   HBaseAdmin admin;
38.   try {
39.    admin = new HBaseAdmin(configuration);
40.    if(admin.tableExists(tableName)){
41.     admin.disableTable(tableName);
42.     admin.deleteTable(tableName);
43.     System.out.println(tableName+"is exist ,delete ......");
44.    }
45.    
46.    
47.    HTableDescriptor tableDescriptor=new HTableDescriptor(TableName.valueOf(tableName));
48.    tableDescriptor.addFamily(new HColumnDescriptor("info"));
49.    tableDescriptor.addFamily(new HColumnDescriptor("address"));
50.    admin.createTable(tableDescriptor);
51.    System.out.println("end create table");
52.   } catch (MasterNotRunningException e) {
53.    // TODO Auto-generated catch block
54.    e.printStackTrace();
55.   } catch (ZooKeeperConnectionException e) {
56.    // TODO Auto-generated catch block
57.    e.printStackTrace();
58.   } catch (IOException e) {
59.    // TODO Auto-generated catch block
60.    e.printStackTrace();
61.   }
62.   
63. }
66. public static void dropTable(Configuration configuration,String tableName){
67.   HBaseAdmin admin;
68.   try {
69.    admin = new HBaseAdmin(configuration);
70.    if(admin.tableExists(tableName)){
71.     admin.disableTable(tableName);
72.     admin.deleteTable(tableName);
73.     System.out.println(tableName+"delete success!");
74.    }else{
75.     System.out.println(tableName+"Table does not exist!");
76.    }
77.   } catch (MasterNotRunningException e) {
78.    // TODO Auto-generated catch block
79.    e.printStackTrace();
80.   } catch (ZooKeeperConnectionException e) {
81.    // TODO Auto-generated catch block
82.    e.printStackTrace();
83.   } catch (IOException e) {
84.    // TODO Auto-generated catch block
85.    e.printStackTrace();
86.   }
87. }
90. public static void addData(Configuration configuration,String tableName){
91.   HBaseAdmin admin;
92.   try {
93.    admin = new HBaseAdmin(configuration);
94.    if(admin.tableExists(tableName)){
95.     HTable table=new HTable(configuration, tableName);
96.     Put put=new Put(Bytes.toBytes("zhangsan"));
97.     put.add(Bytes.toBytes("info"), Bytes.toBytes("age"), Bytes.toBytes("28"));
98.     table.put(put);
99.     System.out.println("add success!");
100.    }else{
101.     System.out.println(tableName+"Table does not exist!");
102.    }
103.   } catch (MasterNotRunningException e) {
104.    // TODO Auto-generated catch block
105.    e.printStackTrace();
106.   } catch (ZooKeeperConnectionException e) {
107.    // TODO Auto-generated catch block
108.    e.printStackTrace();
109.   } catch (IOException e) {
110.    // TODO Auto-generated catch block
111.    e.printStackTrace();
112.   }
113. }
116. public static void deleteDate(Configuration configuration,String tableName){
117.   HBaseAdmin admin;
118.   try {
119.    admin=new HBaseAdmin(configuration);
120.    if(admin.tableExists(tableName)){
121.     HTable table=new HTable(configuration, tableName);
122.     Delete delete=new Delete(Bytes.toBytes("zhangsan"));
123.     table.delete(delete);
124.     System.out.println("delete success!");
125.    }else{
126.     System.out.println("Table does not exist!");
127.    }
128.   } catch (MasterNotRunningException e) {
129.    // TODO Auto-generated catch block
130.    e.printStackTrace();
131.   } catch (ZooKeeperConnectionException e) {
132.    // TODO Auto-generated catch block
133.    e.printStackTrace();
134.   } catch (IOException e) {
135.    // TODO Auto-generated catch block
136.    e.printStackTrace();
137.   }
138. }
141. public static void getData(Configuration configuration,String tableName){
142.   HTable table;
143.   try {
144.    table = new HTable(configuration, tableName);
145.    Get get=new Get(Bytes.toBytes("zhangsan"));
146.    Result result=table.get(get);
148.    for(Cell cell:result.rawCells()){   
149.     System.out.println("RowName:"+new String(CellUtil.cloneRow(cell))+" ");
150.     System.out.println("Timetamp:"+cell.getTimestamp()+" ");
151.     System.out.println("column Family:"+new String(CellUtil.cloneFamily(cell))+" ");
152.     System.out.println("row Name:"+new String(CellUtil.cloneQualifier(cell))+" ");
153.     System.out.println("value:"+new String(CellUtil.cloneValue(cell))+" ");
154.    }
155.   } catch (IOException e) {
156.    // TODO Auto-generated catch block
157.    e.printStackTrace();
158.   }
159. }
162. public static void getAllData(Configuration configuration,String tableName){
163.   HTable table;
164.   try {
165.    table=new HTable(configuration, tableName);
166.    Scan scan=new Scan();
167.    ResultScanner results=table.getScanner(scan);
168.    for(Result result:results){
169.     for(Cell cell:result.rawCells()){   
170.      System.out.println("RowName:"+new String(CellUtil.cloneRow(cell))+" ");
171.      System.out.println("Timetamp:"+cell.getTimestamp()+" ");
172.      System.out.println("column Family:"+new String(CellUtil.cloneFamily(cell))+" ");
173.      System.out.println("row Name:"+new String(CellUtil.cloneQualifier(cell))+" ");
174.      System.out.println("value:"+new String(CellUtil.cloneValue(cell))+" ");
175.     }
176.    }
177.   } catch (IOException e) {
178.    // TODO Auto-generated catch block
179.    e.printStackTrace();
180.   }
181.     
182. }
183. }

 

 

 

 

 

http://blog.sina.com.cn/s/blog_68674da70102vaaw.html