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keyword

关键词过滤、替换、高亮、统计算法.
对1万字的文章、1千关键词进行筛选,一秒内可执行2000次,平均耗时0.5毫秒。
不依赖其它第三方工具库。
参考了https://github.com/jmhsieh/aho-corasick。

典型用法如下:

KeywordFilterBuilder builder = new KeywordFilter();
// 设置关键词   
builder.setKeywords( Arrays.asList("心情", "哈哈", "敏感词1", "敏感词2") );   
// 设置跳过字符   
builder.setSkipChars( Arrays.asList('*', '_',  ',',  '.',  '-') );   
final KeywordFilter filter = builder.build();  
// 统计关键字出现次数                         
filter.count( "老龙恼怒闹老农,老农恼怒闹老龙。", "老龙" );     // 2          
filter.count( "老*龙恼怒闹老农,老农恼怒闹老_龙。", "老龙" );   // 2         

// 替换关键字                  
filter.replace( "买彩票中奖了,哈哈", new ReplaceStrategy() {             
        public String replaceWith(String keywords) {                       
             return "呵呵";                                                     
        }                                                      
}); 
// return "买彩票中奖了,呵呵".  
                                             
// 判断是否包含关键词           
filter.hasKeywords( "今天天气不错,心情也跟着好起来了" );      // true  
filter.hasKeywords( "今天天气不错,心*情也跟着好起来了" );      // true

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