Java进行http请求工具类代码(支持https)
package com.guyezhai.modules.utils; import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.security.cert.X509Certificate;
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.X509TrustManager; public class HttpUtils { /**
* POST请求远程http页面
*
* @param contentUrl
* @param params
* @return
*/
public static String post(String contentUrl, Map<String, Object> params) {
StringBuilder contentBuilder = new StringBuilder();
HttpURLConnection connection = null;
DataOutputStream out = null;
BufferedReader reader = null;
try {
connection = (HttpURLConnection) new URL(contentUrl).openConnection();
// 设置Socket超时
connection.setConnectTimeout(10000);
connection.setReadTimeout(20000);
// Post 请求不能使用缓存
connection.setUseCaches(false);
// URLConnection.setInstanceFollowRedirects是成员函数,仅作用于当前函数
connection.setInstanceFollowRedirects(true);
connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
connection.setRequestMethod("POST");
connection.setDoOutput(true);// 是否输入参数
// 要注意的是connection.getOutputStream会隐含的进行connect
connection.connect(); out = new DataOutputStream(connection.getOutputStream());
StringBuilder parambBuilder = new StringBuilder();
if (params != null) {
for (Entry<String, Object> e : params.entrySet()) {
parambBuilder.append(e.getKey()).append("=").append(URLEncoder.encode(String.valueOf(e.getValue()), "UTF-8")).append("&");
}
parambBuilder.deleteCharAt(parambBuilder.length() - 1);
}
// DataOutputStream.writeBytes将字符串中的16位的unicode字符以8位的字符形式写道流里面
out.writeBytes(parambBuilder.toString());
out.flush(); reader = new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8")); int buffer = 0;
while ((buffer = reader.read()) != -1) {
contentBuilder.append((char) buffer);
} } catch (Exception e) {
// 异常处理
} finally {
if (out != null) {
try {
out.close();
} catch (IOException e1) {
e1.printStackTrace();
}
}
if (reader != null) {
try {
reader.close();
} catch (IOException e1) {
e1.printStackTrace();
}
} if (connection != null) {
connection.disconnect();
}
}
return contentBuilder.toString();
} /**
* Get方法请求
*
* @param contentUrl
* @return
*/
public static String get(String contentUrl) {
StringBuilder contentBuilder = new StringBuilder();
HttpURLConnection connection = null;
BufferedReader reader = null;
try {
connection = (HttpURLConnection) new URL(contentUrl).openConnection();
// 设置Socket超时
connection.setConnectTimeout(10000);
connection.setReadTimeout(20000);
connection.setRequestMethod("GET");
connection.connect(); reader = new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8")); int buffer = 0;
while ((buffer = reader.read()) != -1) {
contentBuilder.append((char) buffer);
}
} catch (Exception e) {
// 异常处理
} finally {
if (reader != null) {
try {
reader.close();
} catch (IOException e1) {
e1.printStackTrace();
}
}
if (connection != null) {
connection.disconnect();
}
}
return contentBuilder.toString();
} /**
* POST请求远程https页面
*
* @param contentUrl
* @param params
* @return
*/
public static String postHttps(String contentUrl, Map<String, Object> params) {
StringBuilder contentBuilder = new StringBuilder();
HttpsURLConnection connection = null;
DataOutputStream out = null;
BufferedReader reader = null;
try {
HostnameVerifier hnv = new HostnameVerifier() {
@Override
public boolean verify(String hostname, SSLSession session) {
return true;
}
}; X509TrustManager trustManager = new X509TrustManager() {
@Override
public X509Certificate[] getAcceptedIssuers() {
return null;
} @Override
public void checkServerTrusted(X509Certificate[] chain, String authType) {
} @Override
public void checkClientTrusted(X509Certificate[] chain, String authType) {
}
}; X509TrustManager[] xtmArray = new X509TrustManager[] { trustManager };
SSLContext sslContext = SSLContext.getInstance("TLS");
sslContext.init(null, xtmArray, new java.security.SecureRandom()); if (sslContext != null) {
HttpsURLConnection.setDefaultSSLSocketFactory(sslContext.getSocketFactory());
}
HttpsURLConnection.setDefaultHostnameVerifier(hnv); connection = (HttpsURLConnection) new URL(contentUrl).openConnection();
// 设置Socket超时
connection.setConnectTimeout(10000);
connection.setReadTimeout(20000);
// Post 请求不能使用缓存
connection.setUseCaches(false);
// URLConnection.setInstanceFollowRedirects是成员函数,仅作用于当前函数
connection.setInstanceFollowRedirects(true);
connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
connection.setRequestMethod("POST");
connection.setDoOutput(true);// 是否输入参数
connection.connect(); out = new DataOutputStream(connection.getOutputStream());
StringBuilder parambBuilder = new StringBuilder();
if (params != null) {
for (Entry<String, Object> e : params.entrySet()) {
parambBuilder.append(e.getKey()).append("=").append(URLEncoder.encode(String.valueOf(e.getValue()), "UTF-8")).append("&");
}
parambBuilder.deleteCharAt(parambBuilder.length() - 1);
}
// DataOutputStream.writeBytes将字符串中的16位的unicode字符以8位的字符形式写道流里面
out.writeBytes(parambBuilder.toString());
out.flush(); reader = new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8")); int buffer = 0;
while ((buffer = reader.read()) != -1) {
contentBuilder.append((char) buffer);
}
} catch (Exception e) {
// 异常处理
} finally {
if (out != null) {
try {
out.close();
} catch (IOException e1) {
e1.printStackTrace();
}
}
if (reader != null) {
try {
reader.close();
} catch (IOException e1) {
e1.printStackTrace();
}
}
if (connection != null) {
connection.disconnect();
}
}
return contentBuilder.toString();
} }
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