「Java開発」HttpClientを利用てSSLに接続、ユーザログイン、ファイルをアップロード処理サンプルコード
サンプルコード：
package com.startnews24;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.security.KeyManagementException;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.CertificateException;
import java.util.ArrayList;
import java.util.List;
import javax.net.ssl.SSLContext;
import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.ParseException;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.SSLContexts;
import org.apache.http.conn.ssl.TrustSelfSignedStrategy;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.mime.MultipartEntityBuilder;
import org.apache.http.entity.mime.content.FileBody;
import org.apache.http.entity.mime.content.StringBody;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import org.junit.Test;
public class HttpClientTest {
@Test
public void jUnitTest() {
get();
}
/**
* HttpClientでSSに接続L
*/
public void ssl() {
CloseableHttpClient httpclient = null;
try {
KeyStore trustStore = KeyStore.getInstance(KeyStore.getDefaultType());
FileInputStream instream = new FileInputStream(new File(“d:\\tomcat.keystore"));
try {
// keyStoreをロード D:\\tomcat.keystore
trustStore.load(instream, “startnews24".toCharArray());
} catch (CertificateException e) {
e.printStackTrace();
} finally {
try {
instream.close();
} catch (Exception ignore) {
}
}
// 自己署名CA証明書
SSLContext sslcontext = SSLContexts.custom().loadTrustMaterial(trustStore, new TrustSelfSignedStrategy()).build();
// 只允许使用TLSv1协议
SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslcontext, new String[] { “TLSv1" }, null,
SSLConnectionSocketFactory.BROWSER_COMPATIBLE_HOSTNAME_VERIFIER);
httpclient = HttpClients.custom().setSSLSocketFactory(sslsf).build();
// httpリクエスト(get方法)を作成
HttpGet httpget = new HttpGet(“https://localhost:8443/myDemo/Ajax/serivceJ.action");
System.out.println(“executing request" + httpget.getRequestLine());
CloseableHttpResponse response = httpclient.execute(httpget);
try {
HttpEntity entity = response.getEntity();
System.out.println(“—————————————-“);
System.out.println(response.getStatusLine());
if (entity != null) {
System.out.println(“Response content length: " + entity.getContentLength());
System.out.println(EntityUtils.toString(entity));
EntityUtils.consume(entity);
}
} finally {
response.close();
}
} catch (ParseException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (KeyManagementException e) {
e.printStackTrace();
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (KeyStoreException e) {
e.printStackTrace();
} finally {
if (httpclient != null) {
try {
httpclient.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
/**
* post方法でフォームを渡す（ユーザログイン処理）
*/
public void postForm() {
// httpClientのインスタンスを作成.
CloseableHttpClient httpclient = HttpClients.createDefault();
// httppostを作成
HttpPost httppost = new HttpPost(“http://localhost:8080/myDemo/Ajax/serivceJ.action");
//パラメータキューを作成
List formparams = new ArrayList();
formparams.add(new BasicNameValuePair(“username", “admin"));
formparams.add(new BasicNameValuePair(“password", “startnews24"));
UrlEncodedFormEntity uefEntity;
try {
uefEntity = new UrlEncodedFormEntity(formparams, “UTF-8");
httppost.setEntity(uefEntity);
System.out.println(“executing request " + httppost.getURI());
CloseableHttpResponse response = httpclient.execute(httppost);
try {
HttpEntity entity = response.getEntity();
if (entity != null) {
System.out.println(“————————————–“);
System.out.println(“Response content: " + EntityUtils.toString(entity, “UTF-8"));
System.out.println(“————————————–“);
}
} finally {
response.close();
}
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e1) {
e1.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
// 接続を閉じて、リソースを釈放
try {
httpclient.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* ローカルアプリケーションが異なるパラメータに応じて異なる結果を取得
*/
public void post() {
//デフォルトのhttpClientインスタンスを作成
CloseableHttpClient httpclient = HttpClients.createDefault();
// httppostを作成
HttpPost httppost = new HttpPost(“http://localhost:8080/myDemo/Ajax/serivceJ.action");
// パラメータキユーを作成
List formparams = new ArrayList();
formparams.add(new BasicNameValuePair(“type", “house"));
UrlEncodedFormEntity uefEntity;
try {
uefEntity = new UrlEncodedFormEntity(formparams, “UTF-8");
httppost.setEntity(uefEntity);
System.out.println(“executing request " + httppost.getURI());
CloseableHttpResponse response = httpclient.execute(httppost);
try {
HttpEntity entity = response.getEntity();
if (entity != null) {
System.out.println(“————————————–“);
System.out.println(“Response content: " + EntityUtils.toString(entity, “UTF-8"));
System.out.println(“————————————–“);
}
} finally {
response.close();
}
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e1) {
e1.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
// 接続を閉じて、リソースを釈放
try {
httpclient.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* getリクエストを送信
*/
public void get() {
CloseableHttpClient httpclient = HttpClients.createDefault();
try {
// httpgetを作成
HttpGet httpget = new HttpGet(“http://www.google.com/");
System.out.println(“executing request " + httpget.getURI());
//getリクエストを実行.
CloseableHttpResponse response = httpclient.execute(httpget);
try {
//応答エンティティを取得
HttpEntity entity = response.getEntity();
System.out.println(“————————————–“);
//応答ステータスを印刷
System.out.println(response.getStatusLine());
if (entity != null) {
// 応答コンテンツの長さを印刷
System.out.println(“応答コンテンツの長さ: " + entity.getContentLength());
// 応答コンテンツを印刷
System.out.println(“応答コンテンツ: " + EntityUtils.toString(entity));
}
System.out.println(“————————————“);
} finally {
response.close();
}
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (ParseException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
//接続を閉じて、リソースを開放
try {
httpclient.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* ファイルをアップロード
*/
public void upload() {
CloseableHttpClient httpclient = HttpClients.createDefault();
try {
HttpPost httppost = new HttpPost(“http://localhost:8080/myDemo/Ajax/serivceFile.action");
FileBody bin = new FileBody(new File(“D:\\image_startnews24\\startnews24.png"));
StringBody comment = new StringBody(“いくつかのバイナル種類ファイル", ContentType.TEXT_PLAIN);
HttpEntity reqEntity = MultipartEntityBuilder.create().addPart(“bin", bin).addPart(“comment", comment).build();
httppost.setEntity(reqEntity);
System.out.println(“executing request " + httppost.getRequestLine());
CloseableHttpResponse response = httpclient.execute(httppost);
try {
System.out.println(“—————————————-“);
System.out.println(response.getStatusLine());
HttpEntity resEntity = response.getEntity();
if (resEntity != null) {
System.out.println(“応答コンテンツの長さ: " + resEntity.getContentLength());
}
EntityUtils.consume(resEntity);
} finally {
response.close();
}
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
httpclient.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}