HTTP 请求工具类,GET请求带参数,GET的map参数,POST请求带参数,map参数,史上最全工具类

转自：https://blog.csdn.net/CoreyXuu/article/details/81945759

个人感觉这个工具类还是有部分问题：

1.工具类中出现了类似这样的方法重载：

这样不太好，容易产生歧义。

2.String data = detail.get("data").toString;可以使用getString()方法。

3.doPostHttp()方法中的Object json参数实际上传入类型修改为String类型Json，因为毕竟最终都要包装到StringEntity()中。

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今天本来想在网上找一个HttpCline调用第三方借口的方法,现在网上各种版本,自己在以前做过的项目里找到了一个工具类,感觉挺方便的,里面包括了get请求带参数,get不带参数,post带参数,post不带参数!

import org.apache.commons.io.IOUtils;
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.HttpClient;
import org.apache.http.client.config.RequestConfig;
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.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
 
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.Charset;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.text.SimpleDateFormat;
import java.util.*;
 
/**
 * HTTP 请求工具类
 */
public class HttpUtils {
	private static PoolingHttpClientConnectionManager connMgr;
	private static RequestConfig requestConfig;
	private static final int MAX_TIMEOUT = 20000;
 
	static {
		// 设置连接池
		connMgr = new PoolingHttpClientConnectionManager();
		// 设置连接池大小
		connMgr.setMaxTotal(100);
		connMgr.setDefaultMaxPerRoute(connMgr.getMaxTotal());
 
		RequestConfig.Builder configBuilder = RequestConfig.custom();
		// 设置连接超时
		configBuilder.setConnectTimeout(MAX_TIMEOUT);
		// 设置读取超时
		configBuilder.setSocketTimeout(MAX_TIMEOUT);
		// 设置从连接池获取连接实例的超时
		configBuilder.setConnectionRequestTimeout(MAX_TIMEOUT);
		// 在提交请求之前 测试连接是否可用
		configBuilder.setStaleConnectionCheckEnabled(true);
		requestConfig = configBuilder.build();
	}
 
	/**
	 * 发送 GET 请求（HTTP），不带输入数据
	 * 
	 * @param url
	 * @param headers
	 *            需要添加的httpheader参数
	 * @return
	 */
	public static String doGet(String url, Map headers, Map params) {
 
		if (url.startsWith("https://")) {
			return doGetSSL(url, headers, params);
		} else {
			return doGetHttp(url, headers, params);
		}
 
	}
 
	/**
	 * 发送 GET 请求（HTTP），K-V形式
	 * 
	 * @param url
	 * @param headers
	 *            需要添加的httpheader参数
	 * @param params
	 * @return
	 */
	public static String doGetHttp(String url, Map headers, Map params) {
		HttpClient httpclient = new DefaultHttpClient();
		String apiUrl = url;
		StringBuffer param = new StringBuffer();
		int i = 0;
		for (String key : params.keySet()) {
			if (i == 0)
				param.append("?");
			else
				param.append("&");
			param.append(key).append("=").append(params.get(key));
			i++;
		}
		apiUrl += param;
		String result = null;
		log("url: " + apiUrl);
		try {
			HttpGet httpGet = new HttpGet(apiUrl);
			// 添加http headers
			if (headers != null && headers.size() > 0) {
				for (String key : headers.keySet()) {
					httpGet.addHeader(key, headers.get(key));
				}
			}
 
			HttpResponse response = httpclient.execute(httpGet);
			int statusCode = response.getStatusLine().getStatusCode();
 
			log("code : " + statusCode);
 
			HttpEntity entity = response.getEntity();
			if (entity != null) {
				InputStream instream = entity.getContent();
				result = IOUtils.toString(instream, "UTF-8");
			}
		} catch (IOException e) {
			e.printStackTrace();
		}
		return result;
	}
 
	/**
	 * 发送 SSL Get 请求（HTTPS），K-V形式
	 * 
	 * @param apiUrl
	 *            API接口URL
	 * @param headers
	 * @param params
	 *            参数map
	 * @return
	 */
	public static String doGetSSL(String url, Map headers, Map params) {
		CloseableHttpClient httpClient = HttpClients.custom().setSSLSocketFactory(createSSLConnSocketFactory())
				.setConnectionManager(connMgr).setDefaultRequestConfig(requestConfig).build();
		CloseableHttpResponse response = null;
		String apiUrl = url;
		String httpStr = null;
		StringBuffer param = new StringBuffer();
		int i = 0;
		for (String key : params.keySet()) {
			if (i == 0)
				param.append("?");
			else
				param.append("&");
			param.append(key).append("=").append(params.get(key));
			i++;
		}
		apiUrl += param;
		log("url: " + apiUrl);
 
		try {
			HttpGet httpGet = new HttpGet(apiUrl);
			httpGet.setConfig(requestConfig);
			// 添加http headers
			if (headers != null && headers.size() > 0) {
				for (String key : headers.keySet()) {
					httpGet.addHeader(key, headers.get(key));
				}
			}
			response = httpClient.execute(httpGet);
			int statusCode = response.getStatusLine().getStatusCode();
			log("code : " + statusCode);
			if (statusCode != HttpStatus.SC_OK) {
				return null;
			}
			HttpEntity entity = response.getEntity();
			if (entity == null) {
				return null;
			}
			httpStr = EntityUtils.toString(entity, "utf-8");
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			if (response != null) {
				try {
					EntityUtils.consume(response.getEntity());
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
		return httpStr;
 
	}
 
	/**
	 * 发送 POST 请求（HTTP），K-V形式
	 * 
	 * @param url
	 * @param headers
	 *            需要添加的httpheader参数
	 * @return
	 */
	public static String doPostByForm(String url, Map headers, Map params) {
		if (url.startsWith("https://")) {
			return doPostSSL(url, headers, params);
		} else {
			return doPostHttp(url, headers, params);
		}
 
	}
	
	/**
	 * 发送 POST 请求（HTTP），JSON形式
	 * 
	 * @param url
	 * @param headers
	 *            需要添加的httpheader参数
	 * @return
	 */
	public static String doPostByJson(String url, Map headers, Object json) {
		if (url.startsWith("https://")) {
			return doPostSSL(url, headers, json);
		} else {
			return doPostHttp(url, headers, json);
		}
 
	}
 
	/**
	 * 发送 POST 请求（HTTP），K-V形式
	 * 
	 * @param apiUrl
	 *            API接口URL
	 * @param headers
	 *            需要添加的httpheader参数
	 * @param params
	 *            参数map
	 * @return
	 */
	public static String doPostHttp(String apiUrl, Map headers, Map params) {
		CloseableHttpClient httpClient = HttpClients.createDefault();
		String httpStr = null;
		HttpPost httpPost = new HttpPost(apiUrl);
		CloseableHttpResponse response = null;
		if (headers != null) {
			Set keys = headers.keySet();
			for (Iterator i = keys.iterator(); i.hasNext();) {
				String key = (String) i.next();
				httpPost.addHeader(key, headers.get(key));
			}
		}
		try {
			httpPost.setConfig(requestConfig);
			List pairList = new ArrayList<>(params.size());
			for (Map.Entry entry : params.entrySet()) {
				NameValuePair pair = new BasicNameValuePair(entry.getKey(), entry.getValue().toString());
				pairList.add(pair);
			}
			httpPost.setEntity(new UrlEncodedFormEntity(pairList, Charset.forName("UTF-8")));
			response = httpClient.execute(httpPost);
			log(response.toString());
			HttpEntity entity = response.getEntity();
			httpStr = EntityUtils.toString(entity, "UTF-8");
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			if (response != null) {
				try {
					EntityUtils.consume(response.getEntity());
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
		return httpStr;
	}
 
	/**
	 * 发送 POST 请求（HTTP），JSON形式
	 * 
	 * @param apiUrl
	 * @param headers
	 *            需要添加的httpheader参数
	 * @param json
	 *            json对象
	 * @return
	 */
	public static String doPostHttp(String apiUrl, Map headers, Object json) {
		CloseableHttpClient httpClient = HttpClients.createDefault();
		String httpStr = null;
		HttpPost httpPost = new HttpPost(apiUrl);
		CloseableHttpResponse response = null;
		if (headers != null) {
			Set keys = headers.keySet();
			for (Iterator i = keys.iterator(); i.hasNext();) {
				String key = (String) i.next();
				httpPost.addHeader(key, headers.get(key));
 
			}
		}
		try {
			httpPost.setConfig(requestConfig);
			StringEntity stringEntity = new StringEntity(json.toString(), "UTF-8");// 解决中文乱码问题
			stringEntity.setContentEncoding("UTF-8");
			stringEntity.setContentType("application/json");
			httpPost.setEntity(stringEntity);
			response = httpClient.execute(httpPost);
			HttpEntity entity = response.getEntity();
			log(response.getStatusLine().getStatusCode() + "");
			httpStr = EntityUtils.toString(entity, "UTF-8");
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			if (response != null) {
				try {
					EntityUtils.consume(response.getEntity());
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
		return httpStr;
	}
 
	/**
	 * 发送 SSL POST 请求（HTTPS），K-V形式
	 * 
	 * @param apiUrl
	 *            API接口URL
	 * @param params
	 *            参数map
	 * @return
	 */
	public static String doPostSSL(String apiUrl, Map headers, Map params) {
		CloseableHttpClient httpClient = HttpClients.custom().setSSLSocketFactory(createSSLConnSocketFactory())
				.setConnectionManager(connMgr).setDefaultRequestConfig(requestConfig).build();
		HttpPost httpPost = new HttpPost(apiUrl);
		CloseableHttpResponse response = null;
		String httpStr = null;
		if (headers != null) {
			Set keys = headers.keySet();
			for (Iterator i = keys.iterator(); i.hasNext();) {
				String key = (String) i.next();
				httpPost.addHeader(key, headers.get(key));
 
			}
		}
		try {
			httpPost.setConfig(requestConfig);
			List pairList = new ArrayList(params.size());
			for (Map.Entry entry : params.entrySet()) {
				NameValuePair pair = new BasicNameValuePair(entry.getKey(), entry.getValue().toString());
				pairList.add(pair);
			}
			httpPost.setEntity(new UrlEncodedFormEntity(pairList, Charset.forName("utf-8")));
			response = httpClient.execute(httpPost);
			int statusCode = response.getStatusLine().getStatusCode();
			if (statusCode != HttpStatus.SC_OK) {
				return null;
			}
			HttpEntity entity = response.getEntity();
			if (entity == null) {
				return null;
			}
			httpStr = EntityUtils.toString(entity, "utf-8");
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			if (response != null) {
				try {
					EntityUtils.consume(response.getEntity());
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
		return httpStr;
	}
 
	/**
	 * 发送 SSL POST 请求（HTTPS），JSON形式
	 * 
	 * @param apiUrl
	 *            API接口URL
	 * @param json
	 *            JSON对象
	 * @return
	 */
	public static String doPostSSL(String apiUrl, Map headers, Object json) {
		CloseableHttpClient httpClient = HttpClients.custom().setSSLSocketFactory(createSSLConnSocketFactory())
				.setConnectionManager(connMgr).setDefaultRequestConfig(requestConfig).build();
		HttpPost httpPost = new HttpPost(apiUrl);
		CloseableHttpResponse response = null;
		String httpStr = null;
		if (headers != null) {
			Set keys = headers.keySet();
			for (Iterator i = keys.iterator(); i.hasNext();) {
				String key = (String) i.next();
				httpPost.addHeader(key, headers.get(key));
 
			}
		}
		try {
			httpPost.setConfig(requestConfig);
			StringEntity stringEntity = new StringEntity(json.toString(), "UTF-8");// 解决中文乱码问题
			stringEntity.setContentEncoding("UTF-8");
			stringEntity.setContentType("application/json");
			httpPost.setEntity(stringEntity);
			response = httpClient.execute(httpPost);
			int statusCode = response.getStatusLine().getStatusCode();
			if (statusCode != HttpStatus.SC_OK) {
				return null;
			}
			HttpEntity entity = response.getEntity();
			if (entity == null) {
				return null;
			}
			httpStr = EntityUtils.toString(entity, "utf-8");
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			if (response != null) {
				try {
					EntityUtils.consume(response.getEntity());
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
		return httpStr;
	}
 
	/**
	 * 创建SSL安全连接
	 *
	 * @return
	 * @throws NoSuchAlgorithmException
	 * @throws KeyManagementException
	 */
	private static SSLConnectionSocketFactory createSSLConnSocketFactory() {
		// 创建TrustManager
		X509TrustManager xtm = new X509TrustManager() {
			public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {
			}
 
			public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {
			}
 
			public X509Certificate[] getAcceptedIssuers() {
				return null;
			}
		};
		// TLS1.0与SSL3.0基本上没有太大的差别，可粗略理解为TLS是SSL的继承者，但它们使用的是相同的SSLContext
		SSLContext ctx;
		try {
			ctx = SSLContext.getInstance("TLS");
			// 使用TrustManager来初始化该上下文，TrustManager只是被SSL的Socket所使用
			ctx.init(null, new TrustManager[] { xtm }, null);
			SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(ctx);
			return sslsf;
		} catch (NoSuchAlgorithmException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (KeyManagementException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return null;
	}
 
	public static void log(String msg) {
		System.out.println(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date()) + "\t: " + msg);
	}
 
	/**
	 * 测试方法
	 * 
	 * @param args
	 */
	public static void main(String[] args) throws Exception {
 
	}
}

第三方接口调用后就是解析数据了;

String转为json可以使用

String PostString = HttpUtils.doPostByForm(url, headers, params);
JSONObject detail = JSONObject.parseObject(PostString);
String data = detail.get("data").toString;