add single query method

src/main/java/com/doc/parser/infrastructure/north/controller/SearchController.java

@@ -6,9 +6,11 @@ import org.elasticsearch.action.search.SearchResponse;
 import org.elasticsearch.client.*;
 import org.elasticsearch.index.query.BoolQueryBuilder;
 import org.elasticsearch.index.query.MultiMatchQueryBuilder;
+import org.elasticsearch.index.query.QueryBuilder;
 import org.elasticsearch.index.query.QueryBuilders;
 import org.elasticsearch.search.builder.SearchSourceBuilder;
 import org.elasticsearch.search.SearchHit;
+import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;
 import org.elasticsearch.search.sort.SortOrder;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.web.bind.annotation.*;
@@ -40,21 +42,8 @@ public class SearchController {
         int size = requestBody.getSize() != null && requestBody.getSize() > 0 ? requestBody.getSize() : defaultPageSize;
         int from = (page - 1) * size;
 
-        // 构建外层 OR 查询
-        BoolQueryBuilder outerQuery = QueryBuilders.boolQuery();
-        for (List<String> group : requestBody.getKeywordGroups()) {
-            BoolQueryBuilder groupQuery = QueryBuilders.boolQuery();
-            for (String keyword : group) {
-                // 使用 match_phrase 精确匹配短语
-                groupQuery.must(QueryBuilders.multiMatchQuery(keyword, "filename", "content")
-                        .type(MultiMatchQueryBuilder.Type.PHRASE));
-            }
-            outerQuery.should(groupQuery);
-        }
-        outerQuery.minimumShouldMatch(1); // 至少匹配一组
-
         SearchSourceBuilder builder = new SearchSourceBuilder()
-                .query(outerQuery)
+                .query(buildSearchQuery(requestBody.getKeywordGroups()))
                 .from(from)
                 .size(size)
                 .sort("mtime", SortOrder.DESC);
@@ -62,7 +51,50 @@ public class SearchController {
         SearchRequest request = new SearchRequest("documents").source(builder);
         SearchResponse response = esClient.search(request, RequestOptions.DEFAULT);
 
+        return buildSearchResponse(response, requestBody.getFlatKeywords(), page, size);
+    }
+
+    @GetMapping
+    public Map<String, Object> search(@RequestParam String q) throws IOException {
+        int page = 1;
+        int size = defaultPageSize;
+        int from = 0;
+
+        // 单关键词转换成一组组结构
+        List<List<String>> keywordGroups = Collections.singletonList(Collections.singletonList(q));
+        List<String> flatKeywords = Collections.singletonList(q);
+
+        SearchSourceBuilder builder = new SearchSourceBuilder()
+                .query(buildSearchQuery(keywordGroups))
+                .from(from)
+                .size(size)
+                .sort("mtime", SortOrder.DESC);
+
+        SearchRequest request = new SearchRequest("documents").source(builder);
+        SearchResponse response = esClient.search(request, RequestOptions.DEFAULT);
+
+        return buildSearchResponse(response, flatKeywords, page, size);
+    }
+
+    private QueryBuilder buildSearchQuery(List<List<String>> keywordGroups) {
+        BoolQueryBuilder outerQuery = QueryBuilders.boolQuery();
+
+        for (List<String> group : keywordGroups) {
+            BoolQueryBuilder groupQuery = QueryBuilders.boolQuery();
+            for (String keyword : group) {
+                groupQuery.must(QueryBuilders.multiMatchQuery(keyword, "filename", "content")
+                        .type(MultiMatchQueryBuilder.Type.PHRASE));
+            }
+            outerQuery.should(groupQuery);
+        }
+
+        outerQuery.minimumShouldMatch(1);
+        return outerQuery;
+    }
+
+    private Map<String, Object> buildSearchResponse(SearchResponse response, List<String> keywords, int page, int size) {
         List<Map<String, Object>> results = new ArrayList<>();
+
         for (SearchHit hit : response.getHits()) {
             Map<String, Object> source = hit.getSourceAsMap();
             Map<String, Object> result = new LinkedHashMap<>();
@@ -71,7 +103,7 @@ public class SearchController {
             result.put("mtime", source.get("mtime"));
 
             String content = (String) source.get("content");
-            String summary = extractMultiSnippet(content, requestBody.getFlatKeywords(), 50);
+            String summary = extractMultiSnippet(content, keywords, 50);
             result.put("summary", summary);
 
             results.add(result);
@@ -85,6 +117,7 @@ public class SearchController {
         return responseBody;
     }
 
+
     private String extractMultiSnippet(String content, List<String> keywords, int contextLength) {
         if (content == null || keywords == null || keywords.isEmpty()) return "";