JavaAPI 连接Hbase 增删改查 操作案例，Junit 测试
刚做的一个小例子，本测试类是在Idea 2017 中完成的maven 构建项目 Pom.xml 中添加依赖信息
<properties>
<hbase-version>1.4.2hbase-version>
properties>
<dependencies>
<dependency>
<groupId>org.apache.hbasegroupId>
<artifactId>hbase-clientartifactId>
<version>${hbase-version}version>
dependency>
<dependency>
<groupId>org.apache.hbasegroupId>
<artifactId>hbase-serverartifactId>
<version>${hbase-version}version>
dependency>
dependencies>
下面是Java代码
package com.apache.hbase;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.*;
import org.apache.hadoop.hbase.client.*;
import org.apache.hadoop.hbase.filter.*;
import org.apache.hadoop.hbase.util.Bytes;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import java.util.ArrayList;
import java.util.List;
public class Hbase {
/**
* 连接 Hbase 的 接口
*/
Connection connection = null;
/**
* 用于和Hbase单个表交互
* 可以使用get, put, delete or scan data
*/
Table table = null;
/**
* HBase的管理API。
* Admin可用于创建、删除、列表、启用和禁用表、添加和删除表。
* 列家庭及其他行政运作。
*/
Admin admin = null;
/**
* 开始之前 创建配置信息
*/
@Before
public void setUp() throws Exception {
Configuration configuration = new Configuration();
System.setProperty("hadoop.home.dir", "D:\\Program Files\\hadoop-2.7.5");
configuration.set("hbase.rootdir", "hdfs://192.168.255.130:9000/hbase");
configuration.set("hbase.zookeeper.quorum", "192.168.255.132:2181");//:2181
connection = ConnectionFactory.createConnection(configuration);
admin = connection.getAdmin();
}
/**
* 结束之后 关闭对象
*/
@After
public void End_up() throws Exception {
if (connection != null) connection.close();
}
/**
* 创建表
*/
@Test
public void Create_Table() throws Exception {
String table_name = "school";
if (admin.tableExists(TableName.valueOf("table_name"))) {
System.out.println("表已经存在");
} else {
HTableDescriptor hTableDescriptor = new HTableDescriptor(TableName.valueOf(table_name));
//添加列族columnFamily ，不必指定列
hTableDescriptor.addFamily(new HColumnDescriptor("address"));
hTableDescriptor.addFamily(new HColumnDescriptor("more"));
hTableDescriptor.addFamily(new HColumnDescriptor("info"));
admin.createTable(hTableDescriptor);
System.out.println("表" + table_name + "创建成功");
}
}
/**
* 查询表
**/
@Test
public void ShowTable_Data() throws Exception {
HTableDescriptor[] listTables = admin.listTables();
if (listTables.length > 0) {
for (HTableDescriptor ta : listTables) {
System.out.println(ta.getNameAsString());
for (HColumnDescriptor column :
ta.getColumnFamilies()) {
System.out.println("\t" + column.getNameAsString());
}
}
}
}
/**
* 添加多条数据
* 添加单条数据 传入参数换成put 对象就可以了
* table.put(Put put);
*/
@Test
public void Put_table() throws Exception {
Table table = connection.getTable(TableName.valueOf("school"));
//创建 put，并制定 put 的Rowkey
Put put = new Put(Bytes.toBytes("zhangsan"));
//byte [] family, byte [] qualifier, byte [] value
put.addColumn(Bytes.toBytes("student"), Bytes.toBytes("age"), Bytes.toBytes(18));
put.addColumn(Bytes.toBytes("student"), Bytes.toBytes("sex"), Bytes.toBytes("男"));
put.addColumn(Bytes.toBytes("student"), Bytes.toBytes("city"), Bytes.toBytes("beijing"));
put.addColumn(Bytes.toBytes("student"), Bytes.toBytes("address"), Bytes.toBytes("henan"));
put.addColumn(Bytes.toBytes("info"), Bytes.toBytes("hobby"), Bytes.toBytes("girl"));
put.addColumn(Bytes.toBytes("info"), Bytes.toBytes("good"), Bytes.toBytes("basketball"));
Put put1 = new Put(Bytes.toBytes("lisi"));
// family ,qualifier, value 顺序不可乱，列族，列，内容
put1.addColumn(Bytes.toBytes("student"), Bytes.toBytes("age"), Bytes.toBytes(22));
put1.addColumn(Bytes.toBytes("student"), Bytes.toBytes("sex"), Bytes.toBytes("女"));
put1.addColumn(Bytes.toBytes("student"), Bytes.toBytes("city"), Bytes.toBytes("nanjing"));
put1.addColumn(Bytes.toBytes("student"), Bytes.toBytes("address"), Bytes.toBytes("hebei"));
put1.addColumn(Bytes.toBytes("info"), Bytes.toBytes("hobby"), Bytes.toBytes("boy"));
put1.addColumn(Bytes.toBytes("info"), Bytes.toBytes("good"), Bytes.toBytes("ball"));
List list = new ArrayList();
list.add(put);
list.add(put1);
table.put(list);
}
/**
* 根据Rowkey进行查询
*/
@Test
public void Scan_by_Rowkey() throws Exception {
String rowKey = "zhangsan";
table = connection.getTable(TableName.valueOf("school"));
Get get = new Get(rowKey.getBytes());
Result result = table.get(get);
System.out.println("列族\t列名\t内容");
for (Cell cell : result.rawCells()) {
System.out.println(
Bytes.toString(CellUtil.cloneRow(cell)) + "\t" + //Rowkey
Bytes.toString(CellUtil.cloneFamily(cell)) + "\t" + //CF
Bytes.toString(CellUtil.cloneQualifier(cell)) + "\t" +//qualifier
Bytes.toString(CellUtil.cloneValue(cell)) //value
);
}
}
/**
* 根据Rowkey 和列祖和列进行查询内容
*/
@Test
public void Scan_by_Rowkey1() throws Exception {
String rowKey = "zhangsan";
table = connection.getTable(TableName.valueOf("school"));
Get get = new Get(rowKey.getBytes());
get.addColumn(Bytes.toBytes("info"), Bytes.toBytes("good"));
Result result = table.get(get);
System.out.println("列族rowKey = \"zhangsan\"列族为info,列为age的值是：");
String age = Bytes.toString(result.getValue(Bytes.toBytes("info"), Bytes.toBytes("age")));
System.out.println(age);
}
/**
* Scan 全表 在实际生产当中是不这样干的，内容上百万千万的，很浪费时间的
* S
* 一般添加过滤器Filter
*/
@Test
public void Scan_Table() throws Exception {
table = connection.getTable(TableName.valueOf("school"));
Scan scan = new Scan();
ResultScanner rs = table.getScanner(scan);
for (Result result :
rs) {
PrintResult(result);
}
}
/**
* Scan 查询 添加个条件，Scan 对象参数是 Rowkey
*/
@Test
public void Scan_Table2() throws Exception {
table = connection.getTable(TableName.valueOf("school"));
Scan scan = new Scan(Bytes.toBytes("wangwu"));
ResultScanner rs = table.getScanner(scan);
for (Result result :
rs) {
PrintResult(result);
}
}
/**
* 定义私有方法 用于打印表的信息
*/
private void PrintResult(Result result) {
for (Cell cell :
result.rawCells()) {
System.out.println(
Bytes.toString(CellUtil.cloneRow(cell)) + "\t" +//Rowkey
Bytes.toString(CellUtil.cloneFamily(cell)) + "\t" +//CF
Bytes.toString(CellUtil.cloneQualifier(cell)) + "\t" +//qualifier
Bytes.toString(CellUtil.cloneValue(cell)) //value
);
}
System.out.println("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~");
}
/**
* 条件过滤 Filter
* 查询后最名 为 wu的
* Hbase 中数据是按照字典顺序进行排列的
* 不会因为插入的时间不同而不同
*/
@Test
public void Filter_01() throws Exception {
table = connection.getTable(TableName.valueOf("school"));
String reg = "^*wu";
org.apache.hadoop.hbase.filter.Filter filter = new RowFilter(CompareFilter.CompareOp.EQUAL, new RegexStringComparator(reg));
Scan scan = new Scan();
scan.setFilter(filter);
ResultScanner results = table.getScanner(scan);
for (Result result :
results) {
PrintResult(result);
}
}
/**
* 前罪名
*/
@Test
public void Filter_0sss() throws Exception {
table = connection.getTable(TableName.valueOf("school"));
String reg = "^*wu";
org.apache.hadoop.hbase.filter.Filter filter = new PrefixFilter(Bytes.toBytes("li"));
Scan scan = new Scan();
scan.setFilter(filter);
ResultScanner results = table.getScanner(scan);
for (Result result :
results) {
PrintResult(result);
}
}
/**
* 多条件过滤 FilterList
*
* MUST_PASS_ALL 全都满足条件
*
* MUST_PASS_ONE 满足一个就可以
*/
@Test
public void FilterList() throws Exception {
table = connection.getTable(TableName.valueOf("school"));
String reg = "^*wu";
FilterList filterList = new FilterList(FilterList.Operator.MUST_PASS_ONE);
org.apache.hadoop.hbase.filter.Filter filter = new PrefixFilter(Bytes.toBytes("li"));
org.apache.hadoop.hbase.filter.Filter filter2 = new PrefixFilter(Bytes.toBytes("zh"));
filterList.addFilter(filter);
filterList.addFilter(filter2);
Scan scan = new Scan();
scan.setFilter(filterList);
ResultScanner results = table.getScanner(scan);
for (Result result :
results) {
PrintResult(result);
}
}
/**
* 删除数据
*/
@Test
public void Delete_Data() throws Exception {
table = connection.getTable(TableName.valueOf("school"));
Delete delete = new Delete(Bytes.toBytes("lisi"));
table.delete(delete);
}
@Test
public void Delete_Data_mutilDelete() throws Exception {
table = connection.getTable(TableName.valueOf("school"));
Delete delete = new Delete(Bytes.toBytes("zhangsan"));
//删除当前版本的内容
// delete.addColumn(Bytes.toBytes("info"),Bytes.toBytes("good"));
//删除所有版本
//delete.addColumns(Bytes.toBytes("info"),Bytes.toBytes("good"));
/**
* addColumn addColumns 是不一样的 ，记住了，
*
* addColumn 是删除单元格当前最近版本的 内容，
*
* addColumns 是删除单元格所有版本的内容
* */
//删除列族
delete.addFamily(Bytes.toBytes("info"));
table.delete(delete);
}
/**
* 删除表
*/
@Test
public void Drop_table() throws Exception {
table = connection.getTable(TableName.valueOf("school"));
if (admin.tableExists(TableName.valueOf("school"))) {
admin.disableTable(TableName.valueOf("school"));
admin.deleteTable(TableName.valueOf("school"));
System.out.println("删除成功");
} else {
System.out.println("表不存在");
}
}
}