4.3 分页与高亮
[mw_shl_code=applescript,true]@Service public class EsCourseService {
private static final Logger LOGGER = LoggerFactory.getLogger(EsCourseService.class);
@Value("${xuecheng.elasticsearch.course.index}")
private String es_index;
@Value("${xuecheng.elasticsearch.course.type}")
private String es_type;
@Value("${xuecheng.elasticsearch.course.source_field}")
private String source_field;
@Autowired
RestHighLevelClient restHighLevelClient;
public QueryResponseResult<CoursePub> list(int page,int size,CourseSearchParam courseSearchParam) {
//设置索引
SearchRequest searchRequest = new SearchRequest(es_index);
//设置类型
searchRequest.types(es_type);
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
BoolQueryBuilder boolQueryBuilder = QueryBuilders.boolQuery();
//source源字段过虑
String[] source_fields = source_field.split(",");
searchSourceBuilder.fetchSource(source_fields, new String[]{});
//关键字
if(StringUtils.isNotEmpty(courseSearchParam.getKeyword())){
//匹配关键字
MultiMatchQueryBuilder multiMatchQueryBuilder = QueryBuilders.multiMatchQuery(courseSearchParam.getKeyword(), "name", "teachplan","description"); //设置匹配占比
multiMatchQueryBuilder.minimumShouldMatch("70%");
//提升另个字段的Boost值
multiMatchQueryBuilder.field("name",10);
boolQueryBuilder.must(multiMatchQueryBuilder);
}
//过虑
if(StringUtils.isNotEmpty(courseSearchParam.getMt())){
boolQueryBuilder.filter(QueryBuilders.termQuery("mt",courseSearchParam.getMt()));
}
if(StringUtils.isNotEmpty(courseSearchParam.getSt())){[/mw_shl_code]
[mw_shl_code=applescript,true] boolQueryBuilder.filter(QueryBuilders.termQuery("st",courseSearchParam.getSt())); } if(StringUtils.isNotEmpty(courseSearchParam.getGrade())){ boolQueryBuilder.filter(QueryBuilders.termQuery("grade",courseSearchParam.getGrade()));
}
//分页
if(page<=0){
page = 1;
}
if(size<=0){
size = 20;
}
int start = (page‐1)*size;
searchSourceBuilder.from(start);
searchSourceBuilder.size(size);
//布尔查询
searchSourceBuilder.query(boolQueryBuilder);
//高亮设置
HighlightBuilder highlightBuilder = new HighlightBuilder();
highlightBuilder.preTags("<font class='eslight'>");
highlightBuilder.postTags("</font>");
//设置高亮字段
highlightBuilder.fields().add(new HighlightBuilder.Field("name"));
searchSourceBuilder.highlighter(highlightBuilder);
//请求搜索
searchRequest.source(searchSourceBuilder);
SearchResponse searchResponse = null;
try {
searchResponse = restHighLevelClient.search(searchRequest);
} catch (IOException e) {
e.printStackTrace();
LOGGER.error("xuecheng search error..{}",e.getMessage());
return new QueryResponseResult(CommonCode.SUCCESS,new QueryResult<CoursePub>());
}
//结果集处理
SearchHits hits = searchResponse.getHits();
SearchHit[] searchHits = hits.getHits();
//记录总数
long totalHits = hits.getTotalHits();
//数据列表
List<CoursePub> list = new ArrayList<>();
for (SearchHit hit : searchHits) {
CoursePub coursePub = new CoursePub();
//取出source
Map<String, Object> sourceAsMap = hit.getSourceAsMap();
//取出名称
String name = (String) sourceAsMap.get("name");
//取出高亮字段内容
[/mw_shl_code]
[mw_shl_code=applescript,true] Map<String, HighlightField> highlightFields = hit.getHighlightFields();
if(highlightFields!=null){
HighlightField nameField = highlightFields.get("name");
if(nameField!=null){
Text[] fragments = nameField.getFragments();
StringBuffer stringBuffer = new StringBuffer();
for (Text str : fragments) {
stringBuffer.append(str.string());
}
name = stringBuffer.toString();
}
}
coursePub.setName(name);
//图片
String pic = (String) sourceAsMap.get("pic");
coursePub.setPic(pic);
//价格
Float price = null;
try {
if(sourceAsMap.get("price")!=null ){
price = Float.parseFloat((String) sourceAsMap.get("price"));
}
} catch (Exception e) {
e.printStackTrace();
}
coursePub.setPrice(price);
Float price_old = null;
try {
if(sourceAsMap.get("price_old")!=null ){
price_old = Float.parseFloat((String) sourceAsMap.get("price_old"));
}
} catch (Exception e) {
e.printStackTrace();
}
coursePub.setPrice_old(price_old);
list.add(coursePub);
}
QueryResult<CoursePub> queryResult = new QueryResult<>();
queryResult.setList(list);
queryResult.setTotal(totalHits);
QueryResponseResult<CoursePub> coursePubQueryResponseResult = new
QueryResponseResult<CoursePub>(CommonCode.SUCCESS,queryResult);
return coursePubQueryResponseResult;
} }[/mw_shl_code]
4.5 Controller
[mw_shl_code=applescript,true]@RestController @RequestMapping("/search/course") public class EsCourseController implements EsCourseControllerApi { @Autowired
EsCourseService esCourseService;
@Override
@GetMapping(value="/list/{page}/{size}")
public QueryResponseResult<CoursePub> list(@PathVariable("page") int page, @PathVariable("size") int size, CourseSearchParam courseSearchParam) throws IOException {
return esCourseService.list(page,size,courseSearchParam);
} }
[/mw_shl_code]
4.5 测试
使用postman测试/search/course
