java 以json格式返回solr响应
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Return solr response in json format
提问by user1247412
I am trying to return solr response in JSON format. However I am not able to get the JSON response. Below is my solr config:'
我正在尝试以 JSON 格式返回 solr 响应。但是我无法获得 JSON 响应。以下是我的 solr 配置：'
<queryResponseWriter name="json" default="true" class="org.apache.solr.request.JSONResponseWriter">
<str name="content-type">application/json</str>
</queryResponseWriter>
Below is my java code:
下面是我的java代码：
HttpSolrServer server = new HttpSolrServer(serverUrl);
SolrQuery query = new SolrQuery();
query.setQuery(query);
query.set("indent","true");
query.set("wt","json");
QueryResponse response = server.query(query);
System.out.println(response.getResults().get(index));
However output is displyed in following format.
但是，输出以以下格式显示。
{numFound=1,start=0,docs=[SolrDocument{_uniqueKey=[“[email protected]”,”abc”], calculation_policy=text_value, username=abc, [email protected], display_order=10, last_login=Mon Jan 26 11:27:35 PST 2015, created=Mon Jan 26 11:27:35 PST 2015}]}
However I get JSON response after execute following line:
但是，我在执行以下行后得到 JSON 响应：
System.out.println(new Gson().toJson(queryResponse.getResults().get(index)));
Can someone please tell me what step am I missing?
有人可以告诉我我错过了哪一步吗？
采纳答案by David Kaplan
Perhaps this link may clarify: quoted format json from Solrj
也许这个链接可以澄清： 来自 Solrj 的引用格式 json
Else maybe you can achieve what you need just through an Http Request as I know that indeed has json support.
否则，也许您可以通过 Http 请求来实现您需要的东西，因为我知道确实有 json 支持。
回答by laberning
With newer versions of Solr (starting with 4.7.0) it is possible to return the query response directly in json-format. This can be done with the NoOpResponseParser.
使用较新版本的 Solr（从 4.7.0 开始），可以直接以 json 格式返回查询响应。这可以通过NoOpResponseParser.
SolrQuery query = new SolrQuery();
QueryRequest req = new QueryRequest(query);
NoOpResponseParser rawJsonResponseParser = new NoOpResponseParser();
rawJsonResponseParser.setWriterType("json");
req.setResponseParser(rawJsonResponseParser);
NamedList<Object> resp = mySolrClient.request(req);
String jsonResponse = (String) resp.get("response");
System.out.println(jsonResponse );
回答by Swaraj
By default Solrj uses wt=javabin&version=2as default for fetching results as described in http://wiki.apache.org/solr/javabin
默认情况下，Solrj 使用wt=javabin&version=2作为默认获取结果，如http://wiki.apache.org/solr/javabin 中所述
However to show the response in json either use GSON or Hymanson(Object Mapper).
但是，要在 json 中显示响应，请使用 GSON 或 Hymanson(Object Mapper)。
