HttpURLConnection,HttpsURLConnection实现http及https客户端
client.HttpURLConnectionClient.java
package client;
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.util.Map;
import java.util.Map.Entry;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;
import org.apache.log4j.Logger;
public class HttpURLConnectionClient {
private final String POST="POST";
private final String GET="GET";
private final String UTF_8 = "UTF-8";
private static HttpURLConnectionClient httpURLConnectionClient = new HttpURLConnectionClient();
private HttpURLConnectionClient(){}
public static HttpURLConnectionClient getInstance(){
return httpURLConnectionClient;
}
private Logger logger = Logger.getLogger(this.getClass());
public String get(String requestUrl) {
StringBuffer buffer = new StringBuffer();
BufferedReader bufferedReader = null;
OutputStream outputStream = null;
HttpURLConnection httpUrlConn = null;
try {
httpUrlConn = createHttpURLConnection(requestUrl);
httpUrlConn.setRequestMethod(GET);
// 将返回的输入流转换成字符串
InputStream inputStream = httpUrlConn.getInputStream();
InputStreamReader inputStreamReader = new InputStreamReader(inputStream, UTF_8);
bufferedReader = new BufferedReader(inputStreamReader);
String str = null;
while ((str = bufferedReader.readLine()) != null) {
buffer.append(str);
}
return buffer.toString();
} catch (Exception e) {
throw new RuntimeException(e);
}finally {
close(bufferedReader,outputStream,httpUrlConn);
}
}
public String post(String requestUrl,Map<String,String> headers, String data) {
StringBuffer buffer = new StringBuffer();
BufferedReader bufferedReader = null;
OutputStream outputStream = null;
HttpURLConnection httpUrlConn = null;
try {
httpUrlConn = createHttpURLConnection(requestUrl);
httpUrlConn.setRequestMethod(POST);
addHeaders(httpUrlConn,headers);
// 当有数据需要提交时
if (null != data) {
outputStream = httpUrlConn.getOutputStream();
// 注意编码格式，防止中文乱码
outputStream.write(data.getBytes("UTF-8"));
outputStream.flush();
}
// 将返回的输入流转换成字符串
InputStream inputStream = httpUrlConn.getInputStream();
InputStreamReader inputStreamReader = new InputStreamReader(inputStream, UTF_8);
bufferedReader = new BufferedReader(inputStreamReader);
String str = null;
while ((str = bufferedReader.readLine()) != null) {
buffer.append(str);
}
return buffer.toString();
} catch (Exception e) {
throw new RuntimeException(e);
}finally {
close(bufferedReader,outputStream,httpUrlConn);
}
}
public String httpsGet(String requestUrl) {
StringBuffer buffer = new StringBuffer();
BufferedReader bufferedReader = null;
OutputStream outputStream = null;
HttpsURLConnection httpUrlConn = null;
try {
// 创建SSLContext对象，并使用我们指定的信任管理器初始化
TrustManager[] tm = { new NonAuthenticationX509TrustManager() };
SSLContext sslContext = SSLContext.getInstance("SSL", "SunJSSE");
sslContext.init(null, tm, new java.security.SecureRandom());
// 从上述SSLContext对象中得到SSLSocketFactory对象
SSLSocketFactory ssf = sslContext.getSocketFactory();
httpUrlConn = (HttpsURLConnection) createHttpURLConnection(requestUrl);
httpUrlConn.setSSLSocketFactory(ssf);
httpUrlConn.setRequestMethod(GET);
// 将返回的输入流转换成字符串
InputStream inputStream = httpUrlConn.getInputStream();
InputStreamReader inputStreamReader = new InputStreamReader(inputStream, UTF_8);
bufferedReader = new BufferedReader(inputStreamReader);
String str = null;
while ((str = bufferedReader.readLine()) != null) {
buffer.append(str);
}
return buffer.toString();
} catch (Exception e) {
throw new RuntimeException(e);
}finally {
close(bufferedReader,outputStream,httpUrlConn);
}
}
public String httpsPost(String requestUrl, Map<String,String> headers,String data) {
StringBuffer buffer = new StringBuffer();
BufferedReader bufferedReader = null;
OutputStream outputStream = null;
HttpsURLConnection httpUrlConn = null;
try {
// 创建SSLContext对象，并使用我们指定的信任管理器初始化
TrustManager[] tm = { new NonAuthenticationX509TrustManager() };
SSLContext sslContext = SSLContext.getInstance("SSL", "SunJSSE");
sslContext.init(null, tm, new java.security.SecureRandom());
// 从上述SSLContext对象中得到SSLSocketFactory对象
SSLSocketFactory ssf = sslContext.getSocketFactory();
httpUrlConn = (HttpsURLConnection) createHttpURLConnection(requestUrl);
httpUrlConn.setSSLSocketFactory(ssf);
httpUrlConn.setRequestMethod(POST);
addHeaders(httpUrlConn,headers);
// 当有数据需要提交时
if (null != data) {
outputStream = httpUrlConn.getOutputStream();
// 注意编码格式，防止中文乱码
outputStream.write(data.getBytes(UTF_8));
outputStream.flush();
}
// 将返回的输入流转换成字符串
InputStream inputStream = httpUrlConn.getInputStream();
InputStreamReader inputStreamReader = new InputStreamReader(inputStream, UTF_8);
bufferedReader = new BufferedReader(inputStreamReader);
String str = null;
while ((str = bufferedReader.readLine()) != null) {
buffer.append(str);
}
return buffer.toString();
} catch (Exception e) {
throw new RuntimeException(e);
}finally {
close(bufferedReader,outputStream,httpUrlConn);
}
}
/* ================================================== private methods ================================================== */
private void addHeaders(HttpURLConnection httpURLConnection,Map<String,String> headers){
if(headers==null){
return;
}
for(Entry<String,String> header:headers.entrySet()){
String key = header.getKey();
String value = header.getValue();
httpURLConnection.addRequestProperty(key, value);
}
}
private HttpURLConnection createHttpURLConnection(String requestUrl){
URL url = null;
HttpURLConnection httpUrlConn = null;
try {
url = new URL(requestUrl);
httpUrlConn = (HttpURLConnection) url.openConnection();
} catch (Throwable e) {
throw new RuntimeException(e);
}
httpUrlConn.setDoOutput(true);
httpUrlConn.setDoInput(true);
httpUrlConn.setUseCaches(false);
return httpUrlConn;
}
private void close(BufferedReader bufferedReader,
OutputStream outputStream,
HttpURLConnection httpUrlConn) {
if(outputStream!=null){
try{
outputStream.close();
}catch(Throwable e){
logger.error("关闭流失败!",e);
}
}
if(bufferedReader!=null){
try{
bufferedReader.close();
}catch(Throwable e){
logger.error("关闭流失败!",e);
}
}
if(httpUrlConn!=null){
try{
httpUrlConn.disconnect();
}catch(Throwable e){
logger.error("关闭连接失败!",e);
}
}
}
}
client.NonAuthenticationX509TrustManager.java
package client;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import javax.net.ssl.X509TrustManager;
class NonAuthenticationX509TrustManager implements X509TrustManager {
@Override
public void checkClientTrusted(X509Certificate[] x509Certificates, String s) throws CertificateException {
}
@Override
public void checkServerTrusted(X509Certificate[] x509Certificates, String s) throws CertificateException {
}
@Override
public X509Certificate[] getAcceptedIssuers() {
return new X509Certificate[0];
}
}