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[英]How to use queryString() in elasticsearch (java API)?
[英]How to use Elasticsearch Rest api in java?
我正在使用Apache Http客户端来使用ElasticSearch Rest Api,但我总是得到HTTP错误代码为200.请帮忙
Java代码
import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.util.Scanner;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;
public class ApacheHttpClientPost {
public static void main(String[] args) {
String path="C:\\Tools\\ElasticSearchApi\\javadoc.txt", filecontent="";
ApacheHttpClientPost apacheHttpClientPost = new ApacheHttpClientPost();
try {
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost postRequest = new HttpPost("http://localhost:9200/versioneg/message/_percolate");
filecontent=apacheHttpClientPost.readFileContent(path);
System.out.println(filecontent);
StringEntity input = new StringEntity(filecontent);
input.setContentType("application/json");
postRequest.setEntity(input);
HttpResponse response = httpClient.execute(postRequest);
if (response.getStatusLine().getStatusCode() != 201) {
throw new RuntimeException("Failed : HTTP error code : " + response.getStatusLine().getStatusCode());
}
BufferedReader br = new BufferedReader(new InputStreamReader((response.getEntity().getContent())));
String output;
System.out.println("Output from Server .... \n");
while ((output = br.readLine()) != null) {
System.out.println(output);
}
httpClient.getConnectionManager().shutdown();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
private String readFileContent(String pathname) throws IOException {
File file = new File(pathname);
StringBuilder fileContents = new StringBuilder((int)file.length());
Scanner scanner = new Scanner(file);
String lineSeparator = System.getProperty("line.separator");
try {
while(scanner.hasNextLine()) {
fileContents.append(scanner.nextLine() + lineSeparator);
}
return fileContents.toString();
} finally {
scanner.close();
}
}
}
安慰
{
"doc": {
"os": "Linux",
"product": {
"name": "abc",
"version": 10.1,
"configversion": 1,
"arch": 32,
"license": "commercial",
"db": {
"@type": "Oracle"
}
}
}
}
Exception in thread "main" java.lang.RuntimeException: Failed : HTTP error code : 200
at com.informatica.zanshin.esapi.utils.ApacheHttpClientPost.main(ApacheHttpClientPost.java:31)
这是elasticsearch意义截图
状态代码200代表“确定”
检查w3c参考
你应该用
if(response.getStatusLine().getStatusCode() != 200){
// Throw exception or something else
}
经过少量修改后,您的代码将运行。 由于DefaultHttpClient现在已被折旧,您需要使用HttpClient并且不需要更改状态代码,因为我在post请求中验证它返回响应代码201并且在get请求中它返回200.如果你知道fiddler,我也有附上了提琴手的会话截图。 如果您不了解fiddler,可以访问http://www.telerik.com/fiddler
try {
HttpClient httpClient = HttpClientBuilder.create().build();
HttpPost postRequest = new HttpPost("http://localhost:9200/versioneg/message/");
StringEntity requestEntity = new StringEntity(resultJsonObject.toString(), ContentType.APPLICATION_JSON);
System.out.println("resultJsonobject: "+ resultJsonObject.toString());
postRequest.setEntity(requestEntity);
HttpResponse response = httpClient.execute(postRequest);
if (response.getStatusLine().getStatusCode() != 201) {
throw new RuntimeException("Failed : HTTP error code : " + response.getStatusLine().getStatusCode());
}
BufferedReader br = new BufferedReader(new InputStreamReader((response.getEntity().getContent())));
String output;
System.out.println("Output from Server .... \n");
while ((output = br.readLine()) != null) {
System.out.println(output);
}
} catch (Exception e) {
e.printStackTrace();
}
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