java http请求

public String getApiUrl(String apiUrl) throws Exception {
	Map headers = new HashMap<>();
	headers.put("X-Requested-With","XMLHttpRequest");
	headers.put("Content-Type","application/json;charset=UTF-8");
	return doGet(apiUrl, headers);
}



public String postApiUrl(String apiUrl ,String paramsJSON ) throws Exception {
	Map headers = new HashMap<>();
	headers.put("X-Requested-With","XMLHttpRequest");
	headers.put("Content-Type","application/json;charset=UTF-8");
	return doPost(apiUrl , paramsJSON, headers);
}



public  String doPost(String url, String paramsJSON, Map headers){
	Date startDate = new Date();
	DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
	BufferedReader in = null;
	try {
		System.out.println(dateFormat.format(startDate) + "  doPost开始：" + url+"t"+ paramsJSON);
		// 定义HttpClient
		HttpClient client = HttpClientBuilder.create().build();
		// 实例化HTTP方法
		HttpPost request = new HttpPost();
		request.setURI(new URI(url));
		//设置参数
		request.setEntity(new StringEntity(paramsJSON, Charset.forName("UTF-8")));

		for (Iterator iter = headers.keySet().iterator(); iter.hasNext(); ) {
			String name = (String) iter.next();
			String value = String.valueOf(headers.get(name));
			request.setHeader(name, value);
		}

		HttpResponse response = client.execute(request);
		int code = response.getStatusLine().getStatusCode();
		if (code == 200) {    //请求成功
			in = new BufferedReader(new InputStreamReader(response.getEntity()
					.getContent(), "utf-8"));
			StringBuffer sb = new StringBuffer("");
			String line = "";
			String NL = System.getProperty("line.separator");
			while ((line = in.readLine()) != null) {
				sb.append(line + NL);
			}
			in.close();
			System.out.println(dateFormat.format(new Date()) + "  doPost结束：" + url+"t"+paramsJSON);
			return sb.toString();
		} else {    //
			System.out.println("状态码：" + code + "  " + url);
			return null;
		}
	} catch (Exception e) {
		long diff = new Date().getTime() - startDate.getTime();
		long seconds = diff / 1000;
		System.out.println("请求异常： " + url + "   耗时" + seconds);
		e.printStackTrace();
		return null;
	}
}



public  String doGet(String url, Map headers) {
	Date startDate = new Date();
	DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
	BufferedReader in = null;
	try {
		System.out.println(dateFormat.format(startDate) + "  doGet：" + url);
		// 定义HttpClient
		//HttpClient client = new DefaultHttpClient();
		HttpClient client = HttpClientBuilder.create().build();
		// 实例化HTTP方法
		HttpGet request = new HttpGet();
		request.setURI(new URI(url));
		for (Iterator iter = headers.keySet().iterator(); iter.hasNext(); ) {
			String name = (String) iter.next();
			String value = String.valueOf(headers.get(name));
			request.setHeader(name, value);
		}

		HttpResponse response = client.execute(request);
		int code = response.getStatusLine().getStatusCode();
		if (code == 200) {    //请求成功
			in = new BufferedReader(new InputStreamReader(response.getEntity()
					.getContent(), "utf-8"));
			StringBuffer sb = new StringBuffer("");
			String line = "";
			String NL = System.getProperty("line.separator");
			while ((line = in.readLine()) != null) {
				sb.append(line + NL);
			}
			in.close();
			return sb.toString();
		} else {    //
			System.out.println("状态码：" + code + "  " + url);
			return null;
		}
	} catch (Exception e) {
		long diff = new Date().getTime() - startDate.getTime();
		long seconds = diff / 1000;
		System.out.println("请求异常： " + url + "   耗时" + seconds);
		e.printStackTrace();
		return null;
	}
}