HBase Filter使用方法（一）
一、FilterList
// 通过将operator参数设置为Operator.MUST_PASS_ONE,达到list中各filter为"或"的关系 or // 默认operator参数的值为Operator.MUST_PASS_ALL,即list中各filter为"并"的关系 and FilterList f=new FilterList(FilterList.Operator.MUST_PASS_ONE);
二、几大Filter
1、Comparision Filters
1.1 RowFilter √
1.2 FamilyFilter √
1.3 QualifierFilter √
1.4 ValueFilter √
1.5 DependentColumnFilter ×
2、Dedicated Filters
2.1 SingleColumnValueFilter ×
2.2 SingleColumnValueExcludeFilter ×
2.3 PrefixFilter ×
2.4 PageFilter ×
2.5 KeyOnlyFilter ×
2.6 FirstKeyOnlyFilter ×
2.7 TimestampsFilter ×
2.8 RandomRowFilter ×
3、Decorating Filters
3.1 SkipFilter ×
3.2 WhileMatchFilters ×
1.1 RowFilter
格式：RowFilter(CompareFilter.CompareOp rowCompareOp, ByteArrayComparable rowComparator)
参数一 Operator Description
LESS 小于
LESS_OR_EQUAL 小于等于
EQUAL 等于
NOT_EQUAL 不等于
GREATER_OR_EQUAL 大于等于
GREATER 大于
NO_OP 排除所有
参数二 ByteArrayComparable 可用
BinaryComparator, BinaryPrefixComparator, BitComparator, LongComparator, NullComparator, RegexStringComparator, SubstringComparator
例子：Filter filter=new RowFilter(CompareOp.EQUAL, new BinaryComparator(Bytes.toBytes(RowKey))
相关的过滤方法使用:
提取rowkey以01结尾数据--正则表达式
Filter filter = new RowFilter(CompareFilter.CompareOp.EQUAL,new RegexStringComparator(".*01$"));
提取rowkey以包含201407的数据
Filter filter = new RowFilter(CompareFilter.CompareOp.EQUAL,new SubstringComparator("201407"));
提取rowkey以123开头的数据
Filter filter = new RowFilter(CompareFilter.CompareOp.EQUAL,new BinaryPrefixComparator("123".getBytes()));
提取rowkey小于等于row010的行
Filter filter1 = new RowFilter(CompareFilter.CompareOp.LESS_OR_EQUAL,new BinaryComparator("row010".getBytes()));
1.2 FamilyFilter（同上）
1.3 QualifierFilter（同上）--------当列为数字，不管用了？why--------
1.4 ValueFilter（同上）
1.5 DependentColumnFilter 未完待续！