mysql 自定义排序顺序 实例如:在sql语句中加入ORDER BY FIELD(status,3,4,0,2,1)语句可定义排序顺序 SELECT tsdvoucher0_.VOUCHER_ID AS VOUCHER1_0_, tsdvoucher0_.COMMENT_DEVICE_TYPE AS COMMENT2_0_, tsdvoucher0_.COMMENT_ID AS COMMENT3_0_, tsdvoucher0_.COMMENT_PERSON_NO AS COMMENT4_0_
Theory Behind Relevance Scoring Lucene (and thus Elasticsearch) uses the Boolean model to find matching documents, and a formula called the practical scoring function to calculate relevance. This formula borrows concepts from term frequency/inverse d
Field-length norm How long is the field? The shorter the field, the higher the weight. If a term appears in a short field, such as a title field, it is more likely that the content of that field is about the term than if the same term appears in a mu
List list = new LinkedList(); for ( int i = 0 ; i < 9 ; i ++ ) { list.add( " a " + i); } Collections.sort(list); // 顺序排列 System.out.println(list); Collections.shuffle(list); // 混乱的意思 System.out.println(list); Collections.reverse(list); // 倒序排
Vector Space Model The vector space model provides a way of comparing a multiterm query against a document. The output is a single score that represents how well the document matches the query. In order to do this, the model represents both the docum
java.lang.NoClassDefFoundError: Lorg/springframework/beans/factory/access/BeanFactoryReference; at java.lang.Class.getDeclaredFields0(Native Method) at java.lang.Class.privateGetDeclaredFields(Class.java:2583) at java.lang.Class.getDeclaredFields(Cla
