作者：___周麗 | 来源：互联网 | 2023-08-18 17:16
贴上写的比较好的博客资料https:blog.csdn.netweixin_40341116articledetails80913045记录下实战代码：@Overridepubli
贴上写的比较好的博客资料
https://blog.csdn.net/weixin_40341116/article/details/80913045
记录下实战代码：
@Override
public SearchDto improveSearch(SearchDto searchDto) {
String text = searchDto.getTerm();
String type = searchDto.getType();
HighSearchParam searchParam = searchDto.getSearchParam();
// 搜索请求对象
SearchRequest searchRequest = new SearchRequest(BwbdType.ES_INDEX);
// 指定类型
searchRequest.types(BwbdType.ES_TYPE);
// 搜索源构建对象
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
// 搜索方式
// 首先构造多关键字查询条件
BoolQueryBuilder boolQueryBuilder = QueryBuilders.boolQuery();
if (StringUtils.isNotEmpty(text)) {
text = QueryParser.escape(text); // 主要就是这一句把特殊字符都转义,那么lucene就可以识别
MultiMatchQueryBuilder matchQueryBuilder = QueryBuilders
.multiMatchQuery(text, BwbdType.PROPERTY_NUMBERS
, BwbdType.PROPERTY_TITLES, BwbdType.PROPERTY_CONTENTS)
.field(BwbdType.PROPERTY_NUMBERS, 1f)
.field(BwbdType.PROPERTY_TITLES, 0.1f)
.field(BwbdType.PROPERTY_CONTENTS, 0.01f)
.minimumShouldMatch(BwbdType.MATCH_LEVEL_THREE);
// 添加条件到布尔查询
boolQueryBuilder.must(matchQueryBuilder);
} else {
if (null == searchDto.getSearchParam() && StringUtils.isEmpty(type)) {
searchDto.setType(BwbdType.DATA_TYPE_FG);
}
}
// // 通过布尔查询来构造过滤查询
// boolQueryBuilder.filter(QueryBuilders.matchQuery("economics","L"));
if (StringUtils.isNotEmpty(type)) {
boolQueryBuilder.filter(QueryBuilders
.matchQuery(BwbdType.PROPERTY_DATA_TYPE, type));
}
addFilterProperties(text,searchParam, boolQueryBuilder, searchSourceBuilder);
FunctionScoreQueryBuilder.FilterFunctionBuilder[] filterFunctionBuilders = buildFilterFunctionBuilders();
FunctionScoreQueryBuilder query = QueryBuilders.functionScoreQuery(boolQueryBuilder,filterFunctionBuilders)
.boostMode(CombineFunction.SUM)
.scoreMode(FunctionScoreQuery.ScoreMode.SUM);
// 将查询条件封装给查询对象
searchSourceBuilder.query(query);
if (searchDto.getSize() > 20) {
searchDto.setSize(20);
}
searchSourceBuilder.size(searchDto.getSize());
searchSourceBuilder.from(searchDto.getPage() - 1);
// ***********************
// 高亮查询
HighlightBuilder highlightBuilder = new HighlightBuilder();
highlightBuilder.preTags(CommonConstraint.LIGHT_TAG_START); // 高亮前缀
highlightBuilder.postTags(CommonConstraint.LIGHT_TAG_END); // 高亮后缀
List fields = highlightBuilder.fields();
fields.add(new HighlightBuilder
.Field(BwbdType.PROPERTY_NUMBERS)); // 高亮字段
fields.add(new HighlightBuilder
.Field(BwbdType.PROPERTY_TITLES)); // 高亮字段
fields.add(new HighlightBuilder
.Field(BwbdType.PROPERTY_CONTENTS).fragmentSize(100000)); // 高亮字段
// 添加高亮查询条件到搜索源
searchSourceBuilder.highlighter(highlightBuilder);
// ***********************
// // 设置源字段过虑,第一个参数结果集包括哪些字段，第二个参数表示结果集不包括哪些字段
// searchSourceBuilder.fetchSource(new String[]{"name","studymodel","price","timestamp"},new String[]{});
// 向搜索请求对象中设置搜索源
searchRequest.source(searchSourceBuilder);
// 执行搜索,向ES发起http请求
SearchResponse searchRespOnse= null;
try (RestHighLevelClient client = new RestHighLevelClient(restClientBuilder)) {
searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);
obtainFgType(searchDto, searchResponse);
} catch (IOException e) {
e.printStackTrace();
}
return searchDto;
}
private FunctionScoreQueryBuilder.FilterFunctionBuilder[] buildFilterFunctionBuilders() {
FunctionScoreQueryBuilder.FilterFunctionBuilder[] filterFunctionBuilders = new FunctionScoreQueryBuilder.FilterFunctionBuilder[3];
// 时间相关
ScoreFunctionBuilder dateFieldValueScoreFunction = ScoreFunctionBuilders.fieldValueFactorFunction("contentDate")
.missing(946656000000d)
.modifier(FieldValueFactorFunction.Modifier.LN1P).factor(0.1f);
FunctionScoreQueryBuilder.FilterFunctionBuilder date = new FunctionScoreQueryBuilder.FilterFunctionBuilder(dateFieldValueScoreFunction);
filterFunctionBuilders[0] = date;
// 类型相关
ScoreFunctionBuilder dataTypeFieldValueScoreFunction = ScoreFunctionBuilders.fieldValueFactorFunction("dataTypeRelation")
.missing(10d)
.modifier(FieldValueFactorFunction.Modifier.LN1P).factor(1f);
FunctionScoreQueryBuilder.FilterFunctionBuilder dataType = new FunctionScoreQueryBuilder.FilterFunctionBuilder(dataTypeFieldValueScoreFunction);
filterFunctionBuilders[1] = dataType;
// 来源相关
ScoreFunctionBuilder originFieldValueScoreFunction = ScoreFunctionBuilders.fieldValueFactorFunction("originTypeRelation")
.missing(10d)
.modifier(FieldValueFactorFunction.Modifier.LN1P).factor(1f);
FunctionScoreQueryBuilder.FilterFunctionBuilder origin = new FunctionScoreQueryBuilder.FilterFunctionBuilder(originFieldValueScoreFunction);
filterFunctionBuilders[2] = origin;
return filterFunctionBuilders;
}
private void addFilterProperties(String text, HighSearchParam searchParam, BoolQueryBuilder boolQueryBuilder, SearchSourceBuilder searchSourceBuilder) {
if (null != searchParam) {
if (StringUtils.isNotEmpty(searchParam.getYearStr())) {
boolQueryBuilder.filter(QueryBuilders.matchPhraseQuery(BwbdType.PROPERTY_YEARS, searchParam.getYearStr()));
}
if (StringUtils.isNotEmpty(searchParam.getReasonName())) {
boolQueryBuilder.filter(QueryBuilders.matchPhraseQuery("reasonName", searchParam.getReasonName()));
}
if (StringUtils.isNotEmpty(searchParam.getCaseType())) {
boolQueryBuilder.filter(QueryBuilders.matchPhraseQuery("caseType", searchParam.getCaseType()));
}
if (StringUtils.isNotEmpty(searchParam.getTrialRoundText())) {
boolQueryBuilder.filter(QueryBuilders.matchPhraseQuery("trialRoundText", searchParam.getTrialRoundText()));
}
if (StringUtils.isNotEmpty(searchParam.getJudgementType())) {
boolQueryBuilder.filter(QueryBuilders.matchPhraseQuery("judgementType", searchParam.getJudgementType()));
}
if (StringUtils.isNotEmpty(searchParam.getAreaCode())) {
boolQueryBuilder.filter(QueryBuilders.matchPhraseQuery("areaId", searchParam.getAreaCode()));
}
if (StringUtils.isNotEmpty(searchParam.getIndustry())) {
boolQueryBuilder.filter(QueryBuilders.matchPhraseQuery("economics", searchParam.getIndustry()));
}
if (StringUtils.isNotEmpty(searchParam.getTaxType())) {
boolQueryBuilder.filter(QueryBuilders.matchPhraseQuery("stypes", searchParam.getTaxType()));
}
// 排序
// 根据 years 降序排列
if (BwbdType.ORDER_TYPE_DATE.equals(searchParam.getOrderType())) {
searchSourceBuilder.sort(new FieldSortBuilder("contentDate").order(SortOrder.DESC));
}
}
// 如果没有检索内容 默认时间排序
if (StringUtils.isEmpty(text)) {
searchSourceBuilder.sort(new FieldSortBuilder("contentDate").order(SortOrder.DESC));
}
// 根据分数 _score 降序排列 (默认行为)
// searchSourceBuilder.sort(new ScoreSortBuilder().order(SortOrder.DESC));
}
private void obtainFgType(AbstractTxjDto searchDto, SearchResponse searchResponse) {
// 搜索结果
SearchHits hits = searchResponse.getHits();
// 匹配到的总记录数
long totalHits = hits.getTotalHits();
searchDto.setTotal(totalHits);
// 得到匹配度高的文档
SearchHit[] searchHits = hits.getHits();
List bwbdTypes = new ArrayList<>();
for (SearchHit hit : searchHits) {
String content = hit.getSourceAsString();//使用ES的java接口将实体类对应的内容转换为json字符串
BwbdType bwbdType = JSONObject.parseObject(content, BwbdType.class); //生成pojo对象
// 获取高亮查询的内容。如果存在，则替换原来的name
Map highlightFields = hit.getHighlightFields();
if (highlightFields != null) {
HighlightField nameField = highlightFields.get(bwbdType.PROPERTY_NUMBERS);
if (nameField != null) {
Text[] fragments = nameField.getFragments();
StringBuffer stringBuffer = new StringBuffer();
for (Text str : fragments) {
stringBuffer.append(str.string());
}
String numbers = stringBuffer.toString();
bwbdType.setNumbers(numbers);
}
HighlightField titlesField = highlightFields.get(bwbdType.PROPERTY_TITLES);
if (titlesField != null) {
Text[] fragments = titlesField.getFragments();
StringBuffer stringBuffer = new StringBuffer();
for (Text str : fragments) {
stringBuffer.append(str.string());
}
String titles = stringBuffer.toString();
bwbdType.setTitles(titles);
}
HighlightField contentsField = highlightFields.get(bwbdType.PROPERTY_CONTENTS);
if (contentsField != null) {
Text[] fragments = contentsField.getFragments();
StringBuffer stringBuffer = new StringBuffer();
for (Text str : fragments) {
stringBuffer.append(str.string());
}
bwbdType.setContents(stringBuffer.toString());
}
// 处理内容
handleResult(bwbdType);
}
bwbdTypes.add(bwbdType);
}
searchDto.setRows(bwbdTypes);
}
京公网安备 11010802041100号