HttpClient的應用

package com.test;

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鏈接SSL
 */
public void ssl() {
	CloseableHttpClient httpclient = null;
	try {
		KeyStore trustStore = KeyStore.getInstance(KeyStore.getDefaultType());
		FileInputStream instream = new FileInputStream(new File("d:\\tomcat.keystore"));
		try {
			// 加載keyStore d:\\tomcat.keystore  
			trustStore.load(instream, "123456".toCharArray());
		} catch (CertificateException e) {
			e.printStackTrace();
		} finally {
			try {
				instream.close();
			} catch (Exception ignore) {
			}
		}
		// 相信本身的CA和全部自簽名的證書
		SSLContext sslcontext = SSLContexts.custom().loadTrustMaterial(trustStore, new TrustSelfSignedStrategy()).build();
		// 只容許使用TLSv1協議
		SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslcontext, new String[] { "TLSv1" }, null,
				SSLConnectionSocketFactory.BROWSER_COMPATIBLE_HOSTNAME_VERIFIER);
		httpclient = HttpClients.custom().setSSLSocketFactory(sslsf).build();
		// 建立http請求(get方式)
		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方式提交表單（模擬用戶登陸請求）
 */
public void postForm() {
	// 建立默認的httpClient實例.  
	CloseableHttpClient httpclient = HttpClients.createDefault();
	// 建立httppost  
	HttpPost httppost = new HttpPost("http://localhost:8080/myDemo/Ajax/serivceJ.action");
	// 建立參數隊列  
	List<namevaluepair> formparams = new ArrayList<namevaluepair>();
	formparams.add(new BasicNameValuePair("username", "admin"));
	formparams.add(new BasicNameValuePair("password", "123456"));
	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 {
		// 關閉鏈接,釋放資源  
		try {
			httpclient.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}

/**
 * 發送 post請求訪問本地應用並根據傳遞參數不一樣返回不一樣結果
 */
public void post() {
	// 建立默認的httpClient實例.  
	CloseableHttpClient httpclient = HttpClients.createDefault();
	// 建立httppost  
	HttpPost httppost = new HttpPost("http://localhost:8080/myDemo/Ajax/serivceJ.action");
	// 建立參數隊列  
	List<namevaluepair> formparams = new ArrayList<namevaluepair>();
	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 {
		// 關閉鏈接,釋放資源  
		try {
			httpclient.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}

/**
 * 發送 get請求
 */
public void get() {
	CloseableHttpClient httpclient = HttpClients.createDefault();
	try {
		// 建立httpget.  
		HttpGet httpget = new HttpGet("http://www.baidu.com/");
		System.out.println("executing request " + httpget.getURI());
		// 執行get請求.  
		CloseableHttpResponse response = httpclient.execute(httpget);
		try {
			// 獲取響應實體  
			HttpEntity entity = response.getEntity();
			System.out.println("--------------------------------------");
			// 打印響應狀態  
			System.out.println(response.getStatusLine());
			if (entity != null) {
				// 打印響應內容長度  
				System.out.println("Response content length: " + entity.getContentLength());
				// 打印響應內容  
				System.out.println("Response content: " + 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 {
		// 關閉鏈接,釋放資源  
		try {
			httpclient.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}

/**
 * 上傳文件
 */
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("F:\\image\\sendpix0.jpg"));
		StringBody comment = new StringBody("A binary file of some kind", 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("Response content length: " + 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();
		}
	}
}

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