Java類實現發送Http請求(HttpClient)

import java.io.IOException;


import org.apache.commons.logging.Log;
import org.apache.http.HttpEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;


// 清除內存中的緩存和ecache中的緩存
// 創建默認的httpClient實例
CloseableHttpClient httpClient = HttpClients.createDefault();
try {
	// 用get方法發送http請求
	String host=FileManagerAccess.instance().getClearCacheHost();
	HttpGet get_ecache = new HttpGet(host+"/cleanAllCache.do");
	HttpGet get_memory = new HttpGet(host+"/cleanMemoryCacheByKey.do?type=all");
	LOG.info("執行get_ecache請求:...." + get_ecache.getURI());
	LOG.info("執行get_memory請求:...." + get_memory.getURI());
	CloseableHttpResponse ecache_response = null;
	CloseableHttpResponse memory_response = null;
	// 發送get請求
	ecache_response = httpClient.execute(get_ecache);
	memory_response = httpClient.execute(get_memory);
	try {
		// response實體
		HttpEntity ecache_entity = ecache_response.getEntity();
		HttpEntity memory_entity = memory_response.getEntity();
		if (null != ecache_entity) {
			LOG.info("響應狀態碼:" + ecache_response.getStatusLine());
			LOG.info("-------------------------------------------------");
			LOG.info("響應內容:" + EntityUtils.toString(ecache_entity));
			LOG.info("-------------------------------------------------");
		}
		if (null != memory_entity) {
			LOG.info("響應狀態碼:" + memory_response.getStatusLine());
			LOG.info("-------------------------------------------------");
			LOG.info("響應內容:" + EntityUtils.toString(memory_entity));
			LOG.info("-------------------------------------------------");
		}
	} finally {
		ecache_response.close();
		memory_response.close();
	}
} catch (Exception e) {
	e.printStackTrace();
} finally {
	try {
		if (httpClient != null) {
			httpClient.close();
		}
	} catch (IOException e) {
		e.printStackTrace();
	}
}