java - 用于 lucene 搜索的 Rest API

Question

我已经成功创建了一个用于 Lucene 索引和搜索的程序。现在，我需要为我的 Lucene 实现 REST API，但我遇到了一些错误。

谁能坚持告诉我如何在使用 Lucene 搜索时实现 REST API 来检索我的文档？

在包含 Lucene 代码时，我收到“HTTP 状态 500 - 内部服务器错误”。
我特此附上我的代码，其中包含 REST-API 和 Lucene 搜索。

@Path("/lucene")
public class hello {
    @GET
    @Produces(MediaType.TEXT_PLAIN)
    public String hello(@QueryParam("startdate") Date startdate,
                        @QueryParam("enddate") Date enddate,
                        @QueryParam("services") String services,
                        @QueryParam("type") String type) throws IOException {
        String hello = hellosearch(startdate, enddate, services, type);
        return hello;
    }


    private String hellosearch(Date startdate, Date enddate, String services, String type) throws IOException {

        final DateFormat df = new SimpleDateFormat("yyyy-MM-dd");
        final String index = "purple";

        IndexReader reader = DirectoryReader.open(FSDirectory.open(Paths.get(index)));
        final IndexSearcher searcher = new IndexSearcher(reader);
        final Analyzer analyzer = new StandardAnalyzer();

        Date startDate = startdate;
        Date endDate = enddate;
        String service = services;
        String types = type;

        TopDocs results = searchDetails(searcher,startDate, endDate, service, types);

        ScoreDoc[] hits = results.scoreDocs;
        int numTotalHits = Math.toIntExact(results.totalHits.value);
        int end = numTotalHits;
        String resource = "";

        for (int i = 0; i < end; i++) {
            Document doc = searcher.doc(hits[i].doc);
            System.out.println("    service  :" + doc.get("services"));
            System.out.println("    type     :" + doc.get("type"));
            System.out.println("    message  :" + doc.get("message"));
            resource = resource + "services   : " + doc.get("services") + "\ntype    : " + doc.get("type") + "\nmessage  : " + doc.get("message") + "\n";

        }
        return resource;
    }


    private TopDocs searchDetails(IndexSearcher searcher,Date startdate, Date enddate, String service, String types) throws IOException {
        String field = "";
        long millis = 0;

        Date startDate = startdate;

        Date endDate = enddate;

        long startmillis = startDate.getTime();
        long endmillis = endDate.getTime();
        String upperdate = DateTools.dateToString(new Date(startmillis), DateTools.Resolution.SECOND);
        String lowerdate = DateTools.dateToString(new Date(endmillis), DateTools.Resolution.SECOND);

        TermRangeQuery query = new TermRangeQuery("date", new BytesRef(upperdate), new BytesRef(lowerdate), true, true);

        String services = service;
        Term term1 = new Term("services", services);
        Query query1 = new WildcardQuery(term1);


        String type = types;
        Term term2 = new Term("type", type);
        Query query2 = new FuzzyQuery(term2);

        Query query3 = new MatchAllDocsQuery();

        BooleanQuery booleanquery = new BooleanQuery.Builder().add(query, BooleanClause.Occur.MUST)
                .add(query1, BooleanClause.Occur.MUST)
                .add(query2, BooleanClause.Occur.MUST)
                .add(query3, BooleanClause.Occur.MUST).build();

        TopDocs results = searcher.search(booleanquery, 200);
        return results;
    }
}

我已经索引了一个 csv 文件，它包含日期、服务和类型。我需要从用户那里获取 startdate 和 enddate 以及服务和类型，以便我需要检索与特定日期内给定服务和类型匹配的索引文档。

Answer 1

据我了解这个问题，更多的是关于将日期作为休息端点中的参数传递。您可以通过以下方式进行操作。

public String hello(@RequestParam("startdate") @DateTimeFormat(pattern = "dd.MM.yyyy") Date date,
                        ... other parameters ) throws IOException {
        .... other code
    }

或者你可以尝试这样写。

public String hello(@RequestParam("startdate")  @DateTimeFormat(iso = DateTimeFormat.ISO.DATE) LocalDate localDate,
                        ... other parameters ) throws IOException {
        .... other code
    }

除此之外，我建议使用 Apache Solr 或 Elastic Search，您将获得用于搜索的 Rest 端点。