java实现es模糊查询

以下是三种Java实现ES模糊查询的代码示例：

1. 使用match查询的代码实现方式：

@Test
public void matchQuery() throws IOException {
  //1. 创建Request对象
  SearchRequest request = new SearchRequest(index);
  request.types(type);

  //2. 指定查询条件
  SearchSourceBuilder builder = new SearchSourceBuilder();
  builder.query(QueryBuilders.matchQuery("field", "keyword"));

  request.source(builder);

  //3. 执行查询
  SearchResponse resp = client.search(request, RequestOptions.DEFAULT);

  //4. 获取到_source中的数据，并展示
  for (SearchHit hit : resp.getHits().getHits()) {
    Map<String, Object> result = hit.getSourceAsMap();
    System.out.println(result);
  }
}

2. 使用term查询的代码实现方式：

@Test
public void termQuery() throws IOException {
  //1. 创建Request对象
  SearchRequest request = new SearchRequest(index);
  request.types(type);

  //2. 指定查询条件
  SearchSourceBuilder builder = new SearchSourceBuilder();
  builder.query(QueryBuilders.termQuery("field", "value"));

  request.source(builder);

  //3. 执行查询
  SearchResponse resp = client.search(request, RequestOptions.DEFAULT);

  //4. 获取到_source中的数据，并展示
  for (SearchHit hit : resp.getHits().getHits()) {
    Map<String, Object> result = hit.getSourceAsMap();
    System.out.println(result);
  }
}

3. 使用wildcard查询的代码实现方式：

@Test
public void wildcardQuery() throws IOException {
  //1. 创建Request对象
  SearchRequest request = new SearchRequest(index);
  request.types(type);

  //2. 指定查询条件
  SearchSourceBuilder builder = new SearchSourceBuilder();
  builder.query(QueryBuilders.wildcardQuery("field", "pattern"));

  request.source(builder);

  //3. 执行查询
  SearchResponse resp = client.search(request, RequestOptions.DEFAULT);

  //4. 获取到_source中的数据，并展示
  for (SearchHit hit : resp.getHits().getHits()) {
    Map<String, Object> result = hit.getSourceAsMap();
    System.out.println(result);
  }
}

以上是三种常见的Java实现ES模糊查询的方法，你可以根据具体的需求选择适合的方法来进行查询。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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