如何解决Elasticsearch映射设置'not_analyzed'并按Java中的字段分组
要使用Java API应用Elasticsearch映射,
例如。 resources/Customer.json
{
"Customer" : {
"settings" : {
},
"properties" : {
"category" : { "type":"String" , "index" : "not_analyzed"}
}
}
}
}
}
STEP 2)创建一个Java方法以应用json文件中的映射(请参见此处的完整示例)
class EsUtils {
public static Client client
public static void applyMapping(String index, String type, String location) throws Exception {
String source = readJsonDefn(location);
if (source != null) {
PutMappingRequestBuilder pmrb = client.admin().indices()
.preparePutMapping(index)
.setType(type);
pmrb.setSource(source);
MappingListener mappingListener = new MappingListener(pmrb)
// Create type and mapping
Thread thread = new Thread(mappingListener)
thread.start();
while (!mappingListener.processComplete.get()) {
System.out.println("not complete yet. Waiting for 100 ms")
Thread.sleep(100);
}
} else {
System.out.println("mapping error");
}
}
public static String readJsonDefn(String url) throws Exception {
//implement it the way you like
StringBuffer bufferjson = new StringBuffer();
FileInputStream input = new FileInputStream(new File(url).absolutePath);
DataInputStream inputStream = new DataInputStream(input);
BufferedReader br = new BufferedReader(new InputStreamReader(inputStream));
String line;
while ((line = br.readLine()) != null) {
bufferjson.append(line);
}
br.close();
return bufferjson.toString();
}
}
String index = "search"; //yourIndex
String type = "Customer";
String location = "resources/Customer.json";
EsUtils.client = yourClient; //pass your client
EsUtils.applyMapping(index, type, location);
,
SearchRequestBuilder builder = client.prepareSearch("search");
builder.addAggregation(AggregationBuilders.terms("categoryterms")
.field("category").size(0))
SearchResponse response = builder.execute().actionGet();
完整参考
解决方法
我正在尝试将结果分组,以便将它们按类别分组。
SearchResponse response = client.prepareSearch("search")
.addAggregation(AggregationBuilders.terms("category").field("category").size(0))
.execute()
.actionGet();
上面的代码创建了聚合,但是我遇到了一个问题,其中 带有连字符的字符串 被分隔并放入了自己的“ Bucket”中。
从我已阅读的内容中,我需要更改映射设置,以便不分析类别,但是我不确定如何执行此操作。写入Elasticsearch或阅读时完成了吗?究竟如何设置?
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