java解决 es(elasticsearch)查询数据超出10000条报错

这是因为es默认的查询最大值是10000，查询的条数超出这个值就会报错，通过查资料得知，影响查询的是这个配置 max_result_window，因此我们需要修改这个默认值。

这里我采用的是HttpPut请求的方式修改es的配置，代码如下

	public static String doPut(String url, String jsonStr) {

		CloseableHttpClient httpClient = HttpClients.createDefault();
		HttpPut httpPut = new HttpPut(url);
		RequestConfig requestConfig = RequestConfig.custom().setConnectTimeout(35000).setConnectionRequestTimeout(35000).setSocketTimeout(60000).build();
		httpPut.setConfig(requestConfig);
		httpPut.setHeader("Content-type", "application/json");
		httpPut.setHeader("DataEncoding", "UTF-8");

		CloseableHttpResponse httpResponse = null;
		try {
			httpPut.setEntity(new StringEntity(jsonStr));
			httpResponse = httpClient.execute(httpPut);
			HttpEntity entity = httpResponse.getEntity();
			String result = EntityUtils.toString(entity);
			return result;
		} catch (ClientProtocolException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} finally {
			if (httpResponse != null) {
				try {
					httpResponse.close();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}
			if (null != httpClient) {
				try {
					httpClient.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
		return null;
	}

	public static void main(String[] args) throws Exception{
		net.sf.json.JSonObject jsonObject = new JSonObject();
		jsonObject.put("index.max_result_window", 300000);//设定最大检索值
		System.out.println(doPut("http://ip:9200/search/_settings", jsonObject.toString()));
	}

返回值如下，则代表修改配置成功，再次查询es时，300000条的数据之内都不会报错

{"acknowledged":true}

网上搜索了一些方案， 都不能满足自己的需求，于是整理的一套这个方案。算是比较笨的方法，如果有更好地方案欢迎指正。