最近在做微信开发，使用http调用第三方服务API，有些是需要https协议，通过资料和自己编码，写了个支持http和https的工具类，经验证可用，现贴出来保留，也供需要的人使用（有不足的地方，也请大家指教）：
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.util.Map;
import java.util.Map.Entry; import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSession;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager; import org.springframework.util.StringUtils; /**
* http、https 请求工具类， 微信为https的请求
* @author yehx
*
*/
public class HttpUtil { private static final String DEFAULT_CHARSET = "UTF-8"; private static final String _GET = "GET"; // GET
private static final String _POST = "POST";// POST
public static final int DEF_CONN_TIMEOUT = 30000;
public static final int DEF_READ_TIMEOUT = 30000; /**
* 初始化http请求参数
*
* @param url
* @param method
* @param headers
* @return
* @throws Exception
*/
private static HttpURLConnection initHttp(String url, String method,
Map<String, String> headers) throws Exception {
URL _url = new URL(url);
HttpURLConnection http = (HttpURLConnection) _url.openConnection();
// 连接超时
http.setConnectTimeout(DEF_CONN_TIMEOUT);
// 读取超时 --服务器响应比较慢，增大时间
http.setReadTimeout(DEF_READ_TIMEOUT);
http.setUseCaches(false);
http.setRequestMethod(method);
http.setRequestProperty("Content-Type",
"application/x-www-form-urlencoded");
http.setRequestProperty(
"User-Agent",
"Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/33.0.1750.146 Safari/537.36");
if (null != headers && !headers.isEmpty()) {
for (Entry<String, String> entry : headers.entrySet()) {
http.setRequestProperty(entry.getKey(), entry.getValue());
}
}
http.setDoOutput(true);
http.setDoInput(true);
http.connect();
return http;
} /**
* 初始化http请求参数
*
* @param url
* @param method
* @return
* @throws Exception
*/
private static HttpsURLConnection initHttps(String url, String method,
Map<String, String> headers) throws Exception {
TrustManager[] tm = { new MyX509TrustManager() };
System.setProperty("https.protocols", "TLSv1");
SSLContext sslContext = SSLContext.getInstance("TLS");
sslContext.init(null, tm, new java.security.SecureRandom());
// 从上述SSLContext对象中得到SSLSocketFactory对象
SSLSocketFactory ssf = sslContext.getSocketFactory();
URL _url = new URL(url);
HttpsURLConnection http = (HttpsURLConnection) _url.openConnection();
// 设置域名校验
http.setHostnameVerifier(new HttpUtil().new TrustAnyHostnameVerifier());
// 连接超时
http.setConnectTimeout(DEF_CONN_TIMEOUT);
// 读取超时 --服务器响应比较慢，增大时间
http.setReadTimeout(DEF_READ_TIMEOUT);
http.setUseCaches(false);
http.setRequestMethod(method);
http.setRequestProperty("Content-Type",
"application/x-www-form-urlencoded");
http.setRequestProperty(
"User-Agent",
"Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/33.0.1750.146 Safari/537.36");
if (null != headers && !headers.isEmpty()) {
for (Entry<String, String> entry : headers.entrySet()) {
http.setRequestProperty(entry.getKey(), entry.getValue());
}
}
http.setSSLSocketFactory(ssf);
http.setDoOutput(true);
http.setDoInput(true);
http.connect();
return http;
} /**
*
* @description 功能描述: get 请求
* @return 返回类型:
* @throws Exception
*/
public static String get(String url, Map<String, String> params,
Map<String, String> headers) throws Exception {
HttpURLConnection http = null;
if (isHttps(url)) {
http = initHttps(initParams(url, params), _GET, headers);
} else {
http = initHttp(initParams(url, params), _GET, headers);
}
InputStream in = http.getInputStream();
BufferedReader read = new BufferedReader(new InputStreamReader(in,
DEFAULT_CHARSET));
String valueString = null;
StringBuffer bufferRes = new StringBuffer();
while ((valueString = read.readLine()) != null) {
bufferRes.append(valueString);
}
in.close();
if (http != null) {
http.disconnect();// 关闭连接
}
return bufferRes.toString();
} public static String get(String url) throws Exception {
return get(url, null);
} public static String get(String url, Map<String, String> params)
throws Exception {
return get(url, params, null);
} public static String post(String url, String params)
throws Exception {
HttpURLConnection http = null;
if (isHttps(url)) {
http = initHttps(url, _POST, null);
} else {
http = initHttp(url, _POST, null);
}
OutputStream out = http.getOutputStream();
out.write(params.getBytes(DEFAULT_CHARSET));
out.flush();
out.close(); InputStream in = http.getInputStream();
BufferedReader read = new BufferedReader(new InputStreamReader(in,
DEFAULT_CHARSET));
String valueString = null;
StringBuffer bufferRes = new StringBuffer();
while ((valueString = read.readLine()) != null) {
bufferRes.append(valueString);
}
in.close();
if (http != null) {
http.disconnect();// 关闭连接
}
return bufferRes.toString();
} /**
* 功能描述: 构造请求参数
*
* @return 返回类型:
* @throws Exception
*/
public static String initParams(String url, Map<String, String> params)
throws Exception {
if (null == params || params.isEmpty()) {
return url;
}
StringBuilder sb = new StringBuilder(url);
if (url.indexOf("?") == -1) {
sb.append("?");
}
sb.append(map2Url(params));
return sb.toString();
} /**
* map构造url
*
* @return 返回类型:
* @throws Exception
*/
public static String map2Url(Map<String, String> paramToMap)
throws Exception {
if (null == paramToMap || paramToMap.isEmpty()) {
return null;
}
StringBuffer url = new StringBuffer();
boolean isfist = true;
for (Entry<String, String> entry : paramToMap.entrySet()) {
if (isfist) {
isfist = false;
} else {
url.append("&");
}
url.append(entry.getKey()).append("=");
String value = entry.getValue();
if (!StringUtils.isEmpty(value)) {
url.append(URLEncoder.encode(value, DEFAULT_CHARSET));
}
}
return url.toString();
} /**
* 检测是否https
*
* @param url
*/
private static boolean isHttps(String url) {
return url.startsWith("https");
} /**
* https 域名校验
*
* @param url
* @param params
* @return
*/
public class TrustAnyHostnameVerifier implements HostnameVerifier {
public boolean verify(String hostname, SSLSession session) {
return true;// 直接返回true
}
}
}