Java调用Http/Https接口(5)--HttpAsyncClient调用Http/Https接口
HttpAsyncClient是HttpClient的异步版本，提供异步调用的api。文中所使用到的软件版本：Java 1.8.0_191、HttpClient 4.1.4。
1、服务端
2、调用Http接口
2.1、GET请求
public static void get() {
String requestPath = "http://localhost:8080/demo/httptest/getUser?userId=1000&userName=李白";
CloseableHttpAsyncClient httpClient = HttpAsyncClients.createDefault();
try {
httpClient.start();
HttpGet get = new HttpGet(requestPath);
Future<HttpResponse> future = httpClient.execute(get, null);
HttpResponse response = future.get();
System.out.println("GET返回状态：" + response.getStatusLine());
HttpEntity responseEntity = response.getEntity();
System.out.println("GET返回结果：" + EntityUtils.toString(responseEntity));
//回调方式调用
final CountDownLatch latch = new CountDownLatch(1);
final HttpGet get2 = new HttpGet(requestPath);
httpClient.execute(get2, new FutureCallback<HttpResponse>() {
public void completed(final HttpResponse response) {
latch.countDown();
System.out.println("GET(回调方式)返回状态：" + response.getStatusLine());
try {
System.out.println("GET(回调方式)返回结果：" + EntityUtils.toString(response.getEntity()));
} catch (Exception e) {
e.printStackTrace();
}
}
public void failed(final Exception e) {
latch.countDown();
e.printStackTrace();
}
public void cancelled() {
latch.countDown();
System.out.println("cancelled");
}
});
latch.await();
//流方式调用
final CountDownLatch latch2 = new CountDownLatch(1);
final HttpGet get3 = new HttpGet(requestPath);
HttpAsyncRequestProducer producer3 = HttpAsyncMethods.create(get3);
AsyncCharConsumer<HttpResponse> consumer3 = new AsyncCharConsumer<HttpResponse>() {
HttpResponse response;
@Override
protected void onResponseReceived(final HttpResponse response) {
this.response = response;
}
@Override
protected void releaseResources() {
}
@Override
protected HttpResponse buildResult(final HttpContext context) {
return this.response;
}
@Override
protected void onCharReceived(CharBuffer buf, IOControl ioctrl) throws IOException {
System.out.println("GET(流方式)返回结果:" + buf.toString());
}
};
httpClient.execute(producer3, consumer3, new FutureCallback<HttpResponse>() {
public void completed(final HttpResponse response) {
latch2.countDown();
System.out.println("GET(流方式)返回状态：" + response.getStatusLine());
}
public void failed(final Exception e) {
latch2.countDown();
e.printStackTrace();
}
public void cancelled() {
latch2.countDown();
System.out.println("cancelled");
}
});
latch2.await();
} catch (Exception e) {
e.printStackTrace();
} finally {
close(httpClient);
}
}
2.2、POST请求(发送键值对数据）
public static void post() {
CloseableHttpAsyncClient httpClient = HttpAsyncClients.createDefault();
try {
httpClient.start();
String requestPath = "http://localhost:8080/demo/httptest/getUser";
HttpPost post = new HttpPost(requestPath);
List<NameValuePair> list = new ArrayList<NameValuePair>();
list.add(new BasicNameValuePair("userId", "1000"));
list.add(new BasicNameValuePair("userName", "李白"));
post.setEntity(new UrlEncodedFormEntity(list, "utf-8"));
Future<HttpResponse> future = httpClient.execute(post, null);
HttpResponse response = future.get();
System.out.println("POST返回状态：" + response.getStatusLine());
HttpEntity responseEntity = response.getEntity();
System.out.println("POST返回结果：" + EntityUtils.toString(responseEntity));
//回调方式和流方式调用类似
} catch (Exception e) {
e.printStackTrace();
} finally {
close(httpClient);
}
}
2.3、POST请求(发送JSON数据）
public static void post2() {
CloseableHttpAsyncClient httpClient = HttpAsyncClients.createDefault();
try {
httpClient.start();
String requestPath = "http://localhost:8080/demo/httptest/addUser";
HttpPost post = new HttpPost(requestPath);
post.setHeader("Content-type", "application/json");
String param = "{\"userId\": \"1001\",\"userName\":\"杜甫\"}";
post.setEntity(new StringEntity(param, "utf-8"));
Future<HttpResponse> future = httpClient.execute(post, null);
HttpResponse response = future.get();
System.out.println("POST json返回状态：" + response.getStatusLine());
HttpEntity responseEntity = response.getEntity();
System.out.println("POST josn返回结果：" + EntityUtils.toString(responseEntity));
//回调方式和流方式调用类似
} catch (Exception e) {
e.printStackTrace();
} finally {
close(httpClient);
}
}
2.4、上传文件
public static void upload() {
CloseableHttpAsyncClient httpClient = HttpAsyncClients.createDefault();
try {
httpClient.start();
String requestPath = "http://localhost:8080/demo/httptest/upload";
ZeroCopyPost producer = new ZeroCopyPost(requestPath, new File("d:/a.jpg"), ContentType.create("text/plain"));
AsyncCharConsumer<HttpResponse> consumer = new AsyncCharConsumer<HttpResponse>() {
HttpResponse response;
@Override
protected void onResponseReceived(final HttpResponse response) {
this.response = response;
}
@Override
protected void releaseResources() {
}
@Override
protected HttpResponse buildResult(final HttpContext context) {
return this.response;
}
@Override
protected void onCharReceived(CharBuffer buf, IOControl ioctrl) throws IOException {
System.out.println("upload返回结果:" + buf.toString());
}
};
Future<HttpResponse> future = httpClient.execute(producer, consumer, null);
HttpResponse response = future.get();
System.out.println("upload返回状态：" + response.getStatusLine());
} catch (Exception e) {
e.printStackTrace();
} finally {
close(httpClient);
}
}
2.5、下载文件
public static void download() {
CloseableHttpAsyncClient httpClient = HttpAsyncClients.createDefault();
try {
httpClient.start();
String requestPath = "http://localhost:8080/demo/httptest/download";
HttpGet get = new HttpGet(requestPath);
HttpAsyncRequestProducer producer = HttpAsyncMethods.create(get);
File download = new File("d:/temp/download_" + System.currentTimeMillis() + ".jpg");
ZeroCopyConsumer<File> consumer = new ZeroCopyConsumer<File>(download) {
@Override
protected File process(final HttpResponse response, final File file, final ContentType contentType) throws Exception {
if (response.getStatusLine().getStatusCode() != HttpStatus.SC_OK) {
throw new ClientProtocolException("Upload failed: " + response.getStatusLine());
}
return file;
}
};
Future<File> future = httpClient.execute(producer, consumer, null);
System.out.println("download文件大小：" + future.get().length());
} catch (Exception e) {
e.printStackTrace();
} finally {
close(httpClient);
}
}
2.6、完整例子
package com.inspur.demo.http.client; import java.io.File;
import java.io.IOException;
import java.nio.CharBuffer;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.Future; import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.concurrent.FutureCallback;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.nio.client.CloseableHttpAsyncClient;
import org.apache.http.impl.nio.client.HttpAsyncClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.nio.IOControl;
import org.apache.http.nio.client.methods.AsyncCharConsumer;
import org.apache.http.nio.client.methods.HttpAsyncMethods;
import org.apache.http.nio.client.methods.ZeroCopyConsumer;
import org.apache.http.nio.client.methods.ZeroCopyPost;
import org.apache.http.nio.protocol.HttpAsyncRequestProducer;
import org.apache.http.protocol.HttpContext;
import org.apache.http.util.EntityUtils; /**
* 通过HttpClient调用Http接口
*/
public class HttpAsyncClientCase {
/**
* GET请求
*/
public static void get() {
String requestPath = "http://localhost:8080/demo/httptest/getUser?userId=1000&userName=李白";
CloseableHttpAsyncClient httpClient = HttpAsyncClients.createDefault();
try {
httpClient.start();
HttpGet get = new HttpGet(requestPath);
Future<HttpResponse> future = httpClient.execute(get, null);
HttpResponse response = future.get();
System.out.println("GET返回状态：" + response.getStatusLine());
HttpEntity responseEntity = response.getEntity();
System.out.println("GET返回结果：" + EntityUtils.toString(responseEntity)); //回调方式调用
final CountDownLatch latch = new CountDownLatch(1);
final HttpGet get2 = new HttpGet(requestPath);
httpClient.execute(get2, new FutureCallback<HttpResponse>() {
public void completed(final HttpResponse response) {
latch.countDown();
System.out.println("GET(回调方式)返回状态：" + response.getStatusLine());
try {
System.out.println("GET(回调方式)返回结果：" + EntityUtils.toString(response.getEntity()));
} catch (Exception e) {
e.printStackTrace();
}
}
public void failed(final Exception e) {
latch.countDown();
e.printStackTrace();
}
public void cancelled() {
latch.countDown();
System.out.println("cancelled");
} });
latch.await(); //流方式调用
final CountDownLatch latch2 = new CountDownLatch(1);
final HttpGet get3 = new HttpGet(requestPath);
HttpAsyncRequestProducer producer3 = HttpAsyncMethods.create(get3);
AsyncCharConsumer<HttpResponse> consumer3 = new AsyncCharConsumer<HttpResponse>() {
HttpResponse response;
@Override
protected void onResponseReceived(final HttpResponse response) {
this.response = response;
}
@Override
protected void releaseResources() {
}
@Override
protected HttpResponse buildResult(final HttpContext context) {
return this.response;
}
@Override
protected void onCharReceived(CharBuffer buf, IOControl ioctrl) throws IOException {
System.out.println("GET(流方式)返回结果:" + buf.toString());
}
};
httpClient.execute(producer3, consumer3, new FutureCallback<HttpResponse>() {
public void completed(final HttpResponse response) {
latch2.countDown();
System.out.println("GET(流方式)返回状态：" + response.getStatusLine());
}
public void failed(final Exception e) {
latch2.countDown();
e.printStackTrace();
}
public void cancelled() {
latch2.countDown();
System.out.println("cancelled");
}
});
latch2.await();
} catch (Exception e) {
e.printStackTrace();
} finally {
close(httpClient);
}
} /**
* POST请求(发送键值对数据)
*/
public static void post() {
CloseableHttpAsyncClient httpClient = HttpAsyncClients.createDefault();
try {
httpClient.start();
String requestPath = "http://localhost:8080/demo/httptest/getUser";
HttpPost post = new HttpPost(requestPath); List<NameValuePair> list = new ArrayList<NameValuePair>();
list.add(new BasicNameValuePair("userId", "1000"));
list.add(new BasicNameValuePair("userName", "李白"));
post.setEntity(new UrlEncodedFormEntity(list, "utf-8")); Future<HttpResponse> future = httpClient.execute(post, null);
HttpResponse response = future.get();
System.out.println("POST返回状态：" + response.getStatusLine());
HttpEntity responseEntity = response.getEntity();
System.out.println("POST返回结果：" + EntityUtils.toString(responseEntity)); //回调方式和流方式调用类似
} catch (Exception e) {
e.printStackTrace();
} finally {
close(httpClient);
}
} /**
* POST请求(发送json数据)
*/
public static void post2() {
CloseableHttpAsyncClient httpClient = HttpAsyncClients.createDefault();
try {
httpClient.start();
String requestPath = "http://localhost:8080/demo/httptest/addUser";
HttpPost post = new HttpPost(requestPath);
post.setHeader("Content-type", "application/json");
String param = "{\"userId\": \"1001\",\"userName\":\"杜甫\"}";
post.setEntity(new StringEntity(param, "utf-8")); Future<HttpResponse> future = httpClient.execute(post, null);
HttpResponse response = future.get();
System.out.println("POST json返回状态：" + response.getStatusLine());
HttpEntity responseEntity = response.getEntity();
System.out.println("POST josn返回结果：" + EntityUtils.toString(responseEntity)); //回调方式和流方式调用类似
} catch (Exception e) {
e.printStackTrace();
} finally {
close(httpClient);
}
} /**
* 上传文件
*/
public static void upload() {
CloseableHttpAsyncClient httpClient = HttpAsyncClients.createDefault();
try {
httpClient.start();
String requestPath = "http://localhost:8080/demo/httptest/upload";
ZeroCopyPost producer = new ZeroCopyPost(requestPath, new File("d:/a.jpg"), ContentType.create("text/plain"));
AsyncCharConsumer<HttpResponse> consumer = new AsyncCharConsumer<HttpResponse>() {
HttpResponse response;
@Override
protected void onResponseReceived(final HttpResponse response) {
this.response = response;
}
@Override
protected void releaseResources() {
}
@Override
protected HttpResponse buildResult(final HttpContext context) {
return this.response;
}
@Override
protected void onCharReceived(CharBuffer buf, IOControl ioctrl) throws IOException {
System.out.println("upload返回结果:" + buf.toString());
}
};
Future<HttpResponse> future = httpClient.execute(producer, consumer, null);
HttpResponse response = future.get();
System.out.println("upload返回状态：" + response.getStatusLine());
} catch (Exception e) {
e.printStackTrace();
} finally {
close(httpClient);
}
} /**
* 下载文件
*/
public static void download() {
CloseableHttpAsyncClient httpClient = HttpAsyncClients.createDefault();
try {
httpClient.start();
String requestPath = "http://localhost:8080/demo/httptest/download";
HttpGet get = new HttpGet(requestPath);
HttpAsyncRequestProducer producer = HttpAsyncMethods.create(get);
File download = new File("d:/temp/download_" + System.currentTimeMillis() + ".jpg");
ZeroCopyConsumer<File> consumer = new ZeroCopyConsumer<File>(download) {
@Override
protected File process(final HttpResponse response, final File file, final ContentType contentType) throws Exception {
if (response.getStatusLine().getStatusCode() != HttpStatus.SC_OK) {
throw new ClientProtocolException("Upload failed: " + response.getStatusLine());
}
return file;
}
};
Future<File> future = httpClient.execute(producer, consumer, null);
System.out.println("download文件大小：" + future.get().length());
} catch (Exception e) {
e.printStackTrace();
} finally {
close(httpClient);
}
} private static void close(CloseableHttpAsyncClient httpClient) {
try {
if (httpClient != null) {
httpClient.close();
}
} catch (IOException e) {
e.printStackTrace();
}
} public static void main(String[] args) {
get();
post();
post2();
upload();
download();
}
}
3、调用Https接口
与调用Http接口不一样的部分主要在设置ssl部分，其ssl的设置与HttpsURLConnection很相似(参见Java调用Http/Https接口(2)--HttpURLConnection/HttpsURLConnection调用Http/Https接口)；下面用GET请求来演示ssl的设置，其他调用方式类似。
package com.inspur.demo.http.client; import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.security.KeyStore;
import java.util.concurrent.Future; import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSession; import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.conn.ssl.TrustSelfSignedStrategy;
import org.apache.http.impl.nio.client.CloseableHttpAsyncClient;
import org.apache.http.impl.nio.client.HttpAsyncClients;
import org.apache.http.nio.conn.ssl.SSLIOSessionStrategy;
import org.apache.http.ssl.SSLContextBuilder;
import org.apache.http.ssl.SSLContexts;
import org.apache.http.util.EntityUtils; import com.inspur.demo.common.util.FileUtil; /**
* 通过HttpAsyncClient调用Https接口
*/
public class HttpAsyncClientHttpsCase { public static void main(String[] args) {
CloseableHttpAsyncClient httpAsyncClient = null;
CloseableHttpAsyncClient httpAsyncClient2 = null;
CloseableHttpAsyncClient httpAsyncClient3 = null;
try {
/*
* 请求有权威证书的地址
*/
String requestPath = "https://www.12306.cn/index/";
httpAsyncClient = HttpAsyncClients.createDefault();
httpAsyncClient.start();
HttpGet get = new HttpGet(requestPath);
Future<HttpResponse> future = httpAsyncClient.execute(get, null);
HttpResponse response = future.get();
System.out.println(response.getStatusLine());
System.out.println("GET1返回结果：" + EntityUtils.toString(response.getEntity(), "utf-8")); /*
* 请求自定义证书的地址
*/
//获取信任证书库
KeyStore trustStore = getkeyStore("jks", "d:/temp/cacerts", "123456");
//不需要客户端证书
requestPath = "https://10.40.x.x:9010/zsywservice";
httpAsyncClient2 = HttpAsyncClients.custom().setSSLStrategy(getSSLIOSessionStrategy(trustStore)).build();
httpAsyncClient2.start();
get = new HttpGet(requestPath);
future = httpAsyncClient2.execute(get, null);
response = future.get();
System.out.println("GET2：" + EntityUtils.toString(response.getEntity())); //需要客户端证书
requestPath = "https://10.40.x.x:9016/zsywservice";
KeyStore keyStore = getkeyStore("pkcs12", "d:/client.p12", "123456");
httpAsyncClient3 = HttpAsyncClients.custom().setSSLStrategy(getSSLIOSessionStrategy(keyStore, "123456", trustStore)).build();
httpAsyncClient3.start();
get = new HttpGet(requestPath);
future = httpAsyncClient3.execute(get, null);
response = future.get();
System.out.println("GET3返回结果：" + EntityUtils.toString(response.getEntity()));
} catch (Exception e) {
e.printStackTrace();
} finally {
close(httpAsyncClient);
close(httpAsyncClient2);
close(httpAsyncClient3);
}
} public static SSLIOSessionStrategy getSSLIOSessionStrategy(KeyStore keyStore, String keyPassword, KeyStore trustStore) throws Exception {
SSLContextBuilder bulider = SSLContexts.custom();
if (keyStore != null) {
bulider.loadKeyMaterial(keyStore, keyPassword.toCharArray());
}
if (keyStore != null) {
bulider.loadTrustMaterial(trustStore, null);
} else {
bulider.loadTrustMaterial(new TrustSelfSignedStrategy());
}
SSLContext sslContext = bulider.build();
// 验证URL的主机名和服务器的标识主机名是否匹配
HostnameVerifier hostnameVerifier = new HostnameVerifier() {
@Override
public boolean verify(String hostname, SSLSession session) {
// if ("xxx".equals(hostname)) {
// return true;
// } else {
// return false;
// }
return true;
}
};
SSLIOSessionStrategy strategy = new SSLIOSessionStrategy(sslContext, new String[] { "TLSv1", "TLSv1.2" }, null,
hostnameVerifier); return strategy;
} public static SSLIOSessionStrategy getSSLIOSessionStrategy(KeyStore trustStore) throws Exception {
return getSSLIOSessionStrategy(null, null, trustStore);
} private static KeyStore getkeyStore(String type, String filePath, String password) {
KeyStore keySotre = null;
FileInputStream in = null;
try {
keySotre = KeyStore.getInstance(type);
in = new FileInputStream(new File(filePath));
keySotre.load(in, password.toCharArray());
} catch (Exception e) {
e.printStackTrace();
} finally {
FileUtil.close(in);
}
return keySotre;
} private static void close(CloseableHttpAsyncClient httpClient) {
try {
if (httpClient != null) {
httpClient.close();
}
} catch (IOException e) {
e.printStackTrace();
}
} }
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