httpClient 官网
https://hc.apache.org/index.html
https://hc.apache.org/httpcomponents-client-5.1.x/index.html#
这里以httpClient5.1为列
httpClient5.1基本使用
进入后，可以看到常用demo的一些源代码：
package org.apache.hc.client5.http.examples;
import java.io.IOException;
import org.apache.hc.client5.http.ClientProtocolException;
import org.apache.hc.client5.http.classic.methods.HttpGet;
import org.apache.hc.client5.http.impl.classic.CloseableHttpClient;
import org.apache.hc.client5.http.impl.classic.HttpClients;
import org.apache.hc.core5.http.ClassicHttpResponse;
import org.apache.hc.core5.http.HttpEntity;
import org.apache.hc.core5.http.HttpStatus;
import org.apache.hc.core5.http.ParseException;
import org.apache.hc.core5.http.io.HttpClientResponseHandler;
import org.apache.hc.core5.http.io.entity.EntityUtils;
/**
* This example demonstrates the use of the {@link HttpClientResponseHandler} to simplify
* the process of processing the HTTP response and releasing associated resources.
*/
public class ClientWithResponseHandler {
public static void main(final String[] args) throws Exception {
try (final CloseableHttpClient httpclient = HttpClients.createDefault()) {
final HttpGet httpget = new HttpGet("http://httpbin.org/get");
System.out.println("Executing request " + httpget.getMethod() + " " + httpget.getUri());
// Create a custom response handler
final HttpClientResponseHandler responseHandler = new HttpClientResponseHandler() {
@Override
public String handleResponse(
final ClassicHttpResponse response) throws IOException {
final int status = response.getCode();
if (status >= HttpStatus.SC_SUCCESS && status < HttpStatus.SC_REDIRECTION) {
final HttpEntity entity = response.getEntity();
try {
return entity != null ? EntityUtils.toString(entity) : null;
} catch (final ParseException ex) {
throw new ClientProtocolException(ex);
}
} else {
throw new ClientProtocolException("Unexpected response status: " + status);
}
}
};
final String responseBody = httpclient.execute(httpget, responseHandler);
System.out.println("----------------------------------------");
System.out.println(responseBody);
}
}
}
httpclient5.1 使用maven依赖
进入页面，即可查看：
Original: https://www.cnblogs.com/liyuanhong/p/16007750.html
Author: 远洪
Title: java httpclient简单使用
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