1.公司实时决策引擎计算的数据 消费过以后 历史存在elastic search里(2.2.0版本)
以前是用elastic search dsl语法去查数据 现在需要增加elasticsearch sql
直接在代码java代码里整合elasticsearch-sql一直不成功 创建client创建不了
我想先实现功能 用http post模拟浏览器页面请求再自己封装结果数据达到目的
浏览器直接访问http://localhost:9200/_sql?sql=SELECT * FROM mycompany是可以拿到数据的
http post模拟浏览器页面请求报错
//1._sql?sql
String url = "http://localhost:9200/_sql";
String querySQL = "sql=SELECT * FROM mycompany";
//向es发送请求
String esResult = HttpRequest.sendPost(url,querySQL);
System.out.println(esResult);
发送 POST 请求出现异常!java.io.IOException: Server returned HTTP response code: 500 for URL: http://localhost:9200/_sql
java.io.IOException: Server returned HTTP response code: 500 for URL: http://localhost:9200/_sql
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
at com.vivebest.internet.banking.cgf.es.utils.HttpRequest.sendPost(HttpRequest.java:101)
at com.vivebest.internet.banking.cgf.es.action.ESSelectBySQLAction.main(ESSelectBySQLAction.java:34)
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.URL;
import java.net.URLConnection;
import java.util.List;
import java.util.Map;
public class HttpRequest {
/**
* 向指定URL发送GET方法的请求
*
* @param url
* 发送请求的URL
* @param param
* 请求参数,请求参数应该是 name1=value1&name2=value2 的形式。
* @return URL 所代表远程资源的响应结果
*/
public static String sendGet(String url, String param) {
String result = "";
BufferedReader in = null;
try {
String urlNameString = url + "?" + param;
System.out.println(urlNameString);
URL realUrl = new URL(urlNameString);
// 打开和URL之间的连接
URLConnection connection = realUrl.openConnection();
// 设置通用的请求属性
connection.setRequestProperty("accept", "*/*");
connection.setRequestProperty("connection", "Keep-Alive");
connection.setRequestProperty("user-agent",
"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
// 建立实际的连接
connection.connect();
// 获取所有响应头字段
Map<String, List<String>> map = connection.getHeaderFields();
// 遍历所有的响应头字段
for (String key : map.keySet()) {
System.out.println(key + "--->" + map.get(key));
}
// 定义 BufferedReader输入流来读取URL的响应
in = new BufferedReader(new InputStreamReader(
connection.getInputStream()));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
} catch (Exception e) {
System.out.println("发送GET请求出现异常!" + e);
e.printStackTrace();
}
// 使用finally块来关闭输入流
finally {
try {
if (in != null) {
in.close();
}
} catch (Exception e2) {
e2.printStackTrace();
}
}
return result;
}
/**
* 向指定 URL 发送POST方法的请求
*
* @param url
* 发送请求的 URL
* @param param
* 请求参数,请求参数应该是 name1=value1&name2=value2 的形式。
* @return 所代表远程资源的响应结果
*/
public static String sendPost(String url,String param) {
PrintWriter out = null;
BufferedReader in = null;
String result = "";
try {
URL realUrl = new URL(url);
// 打开和URL之间的连接
URLConnection conn = realUrl.openConnection();
// 设置通用的请求属性
conn.setRequestProperty("accept", "*/*");
conn.setRequestProperty("connection", "Keep-Alive");
conn.setRequestProperty("user-agent",
"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
// 发送POST请求必须设置如下两行
conn.setDoOutput(true);
conn.setDoInput(true);
// 获取URLConnection对象对应的输出流
out = new PrintWriter(conn.getOutputStream());
// 发送请求参数
out.print(param);
// flush输出流的缓冲
out.flush();
// 定义BufferedReader输入流来读取URL的响应
in = new BufferedReader(
new InputStreamReader(conn.getInputStream(),"UTF-8"));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
} catch (Exception e) {
System.out.println("发送 POST 请求出现异常!"+e);
e.printStackTrace();
}
//使用finally块来关闭输出流、输入流
finally{
try{
if(out!=null){
out.close();
}
if(in!=null){
in.close();
}
}
catch(IOException ex){
ex.printStackTrace();
}
}
return result;
}
}
1.另外https://github.com/NLPchina/elasticsearch-sql有人在自己项目里整合过吗 可以分享下吗?
如果get方式提交把sql里的空格转换成%20可以正确的请求到数据了
http://localhost:9200/_sql?sql=SELECT%20*%20FROM%20mycompany
null--->[HTTP/1.1200OK]
Content-Length--->[2357]
Content-Type--->[application/json;charset=UTF-8]
{"took":3,"timed_out":false,"_shards":{"total":5,"successful":2,"failed":0},"hits":{"total":11,"max_score":1.0,"hits":[{"_index":"mycompany","_type":"employee","_id":"1","_score":1.0,"_source":{"first_name":"John", "last_name":"Smith", "age":25, "about":"Ilovetogorockclimbing", "interests":["sports","music"]}},{"_index":"mycompany","_type":"employee","_id":"7","_score":1.0,"_source":{"first_name":"John", "last_name":"Smith", "age":25, "about":"Ilovetogorockclimbing", "interests":["sports","music"]}},{"_index":"mycompany","_type":"employee","_id":"13","_score":1.0,"_source":{"first_name":"John", "last_name":"Smith", "age":25, "about":"Ilovetogorockclimbing", "interests":["sports","music"]}},{"_index":"mycompany","_type":"employee","_id":"16","_score":1.0,"_source":{"first_name":"John", "last_name":"Smith", "age":25, "about":"Ilovetogorockclimbing", "interests":["sports","music"]}},{"_index":"mycompany","_type":"employee","_id":"18","_score":1.0,"_source":{"first_name":"Douglas","last_name":"Fir", "age":35, "about":"Iliketobuildcabinets", "interests":["forestry"]}},{"_index":"mycompany","_type":"employee","_id":"28","_score":1.0,"_source":{"first_name":"John", "last_name":"Smith", "age":25, "about":"Ilovetogorockclimbing", "interests":["sports","music"]}},{"_index":"mycompany","_type":"order","_id":"1","_score":1.0,"_source":{"producName":"appleiphone6","capacity":"128G", "color":"black", "price":6000}},{"_index":"mycompany","_type":"employee","_id":"3","_score":1.0,"_source":{"first_name":"Douglas","last_name":"Fir", "age":35, "about":"Iliketobuildcabinets", "interests":["forestry"]}},{"_index":"mycompany","_type":"employee","_id":"11","_score":1.0,"_source":{"first_name":"Jane", "last_name":"Smith", "age":32, "about":"Iliketocollectrockalbums", "interests":["music"]}},{"_index":"mycompany","_type":"employee","_id":"17","_score":1.0,"_source":{"first_name":"Jane", "last_name":"Smith", "age":32, "about":"Iliketocollectrockalbums", "interests":["music"]}},{"_index":"mycompany","_type":"employee","_id":"23","_score":1.0,"_source":{"first_name":"Jane", "last_name":"Smith", "age":32, "about":"Iliketocollectrockalbums", "interests":["music"]}}]}}
现在java代码里直接整合elasticsearchsql已经做好了
之前是创建transportclient的问题 http页面请求是9200端口 创建transportclient时要通过9300端
后面单独写一篇项目里整合elasticsearchsql要注意的点 贴出关键代码
版权声明:本文内容由阿里云实名注册用户自发贡献,版权归原作者所有,阿里云开发者社区不拥有其著作权,亦不承担相应法律责任。具体规则请查看《阿里云开发者社区用户服务协议》和《阿里云开发者社区知识产权保护指引》。如果您发现本社区中有涉嫌抄袭的内容,填写侵权投诉表单进行举报,一经查实,本社区将立刻删除涉嫌侵权内容。