废话不多说上一个例子:
这个例子屏蔽了证书。
/**
* https请求类
*/
package com.zte.ucm.ssologin.ssoclient;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.StringWriter;
import java.net.URL;
import java.security.SecureRandom;
import java.security.cert.CertificateException;
import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.KeyManager;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSession;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import org.apache.commons.lang.StringUtils;
import org.apache.log4j.Logger;
import sun.net.www.protocol.https.Handler;
/**
* @author Administrator
*
*/
public class HttpsConnection {
private static final Logger log = Logger.getLogger(HttpsConnection.class);
private static final String METHOD_GET = "GET";
private static final String METHOD_POST = "POST";
private static final String DEFAULT_CHARSET = "utf-8";
public static String doPost(String url, String params, String charset, int connectTimeout, int readTimeout,boolean getLocation) throws Exception {
String ctype = "text/html;charset=" + charset;
byte[] content = {};
if(params != null){
content = params.getBytes(charset);
}
return doPost(url, ctype, content, connectTimeout, readTimeout,getLocation);
}
public static String doPost(String url, String ctype, byte[] content,int connectTimeout,int readTimeout,boolean getLocation) throws Exception {
HttpsURLConnection conn = null;
OutputStream out = null;
String rsp = null;
try {
try{
SSLContext ctx = SSLContext.getInstance("SSL");
ctx.init(new KeyManager[0], new TrustManager[] {new DefaultTrustManager()}, new SecureRandom());
SSLContext.setDefault(ctx);
conn = getConnection(new URL(null,url,new Handler()), METHOD_POST, ctype);
conn.setRequestMethod("POST");
conn.setHostnameVerifier(new HostnameVerifier() {
@Override
public boolean verify(String hostname, SSLSession session) {
return true;
}
});
conn.setConnectTimeout(connectTimeout);
conn.setReadTimeout(readTimeout);
}catch(Exception e){
log.error("doPost GET_CONNECTOIN_ERROR, URL = " + url, e);
throw e;
}
try{
out = conn.getOutputStream();
out.write(content);
rsp = getResponseAsString(conn);
if (rsp!=null) {
if (getLocation) {
String location = conn.getHeaderField("Location");
if (location!=null) {
return location.substring(location.lastIndexOf("/")+1, location.length());
}
}
}
}catch(IOException e){
log.error("doPost REQUEST_RESPONSE_ERROR, URL = " + url, e);
throw e;
}
}finally {
if (out != null) {
out.close();
}
if (conn != null) {
conn.disconnect();
}
}
return rsp;
}
public static String doGet(String url, String ctype, int connectTimeout,int readTimeout) throws Exception {
HttpsURLConnection conn = null;
String rsp = null;
try {
try{
SSLContext ctx = SSLContext.getInstance("SSL");
ctx.init(new KeyManager[0], new TrustManager[] {new DefaultTrustManager()}, new SecureRandom());
SSLContext.setDefault(ctx);
conn = getConnection(new URL(null,url,new Handler()), METHOD_GET, ctype);
conn.setHostnameVerifier(new HostnameVerifier() {
@Override
public boolean verify(String hostname, SSLSession session) {
return true;
}
});
conn.setConnectTimeout(connectTimeout);
conn.setReadTimeout(readTimeout);
}catch(Exception e){
log.error("doGet GET_CONNECTOIN_ERROR, URL = " + url, e);
throw e;
}
try{
rsp = getResponseAsString(conn);
}catch(IOException e){
log.error("doGet REQUEST_RESPONSE_ERROR, URL = " + url, e);
throw e;
}
}finally {
if (conn != null) {
conn.disconnect();
}
}
return rsp;
}
private static class DefaultTrustManager implements X509TrustManager {
/* (non-Javadoc)
* @see javax.net.ssl.X509TrustManager#checkClientTrusted(java.security.cert.X509Certificate[], java.lang.String)
*/
@Override
public void checkClientTrusted(
java.security.cert.X509Certificate[] arg0, String arg1)
throws CertificateException {
// TODO Auto-generated method stub
}
/* (non-Javadoc)
* @see javax.net.ssl.X509TrustManager#checkServerTrusted(java.security.cert.X509Certificate[], java.lang.String)
*/
@Override
public void checkServerTrusted(
java.security.cert.X509Certificate[] arg0, String arg1)
throws CertificateException {
// TODO Auto-generated method stub
}
/* (non-Javadoc)
* @see javax.net.ssl.X509TrustManager#getAcceptedIssuers()
*/
@Override
public java.security.cert.X509Certificate[] getAcceptedIssuers() {
// TODO Auto-generated method stub
return null;
}
}
private static javax.net.ssl.HttpsURLConnection getConnection(java.net.URL JNurl, String method, String ctype)
throws IOException {
javax.net.ssl.HttpsURLConnection conn = (javax.net.ssl.HttpsURLConnection) JNurl.openConnection();
conn.setRequestMethod(method);
conn.setDoInput(true);
conn.setDoOutput(true);
//conn.setRequestProperty("Accept", "text/plain");
//conn.setRequestProperty("User-Agent", "stargate");
//conn.setRequestProperty("Content-Type", ctype);
return conn;
}
protected static String getResponseAsString(HttpsURLConnection conn) throws IOException {
String charset = getResponseCharset(conn.getContentType());
InputStream es = conn.getErrorStream();
if (es == null) {
return getStreamAsString(conn.getInputStream(), charset);
} else {
String msg = getStreamAsString(es, charset);
if (StringUtils.isEmpty(msg)) {
throw new IOException(conn.getResponseCode() + ":" + conn.getResponseMessage());
} else {
throw new IOException(msg);
}
}
}
private static String getStreamAsString(InputStream stream, String charset) throws IOException {
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(stream, charset));
StringWriter writer = new StringWriter();
char[] chars = new char[256];
int count = 0;
while ((count = reader.read(chars)) > 0) {
writer.write(chars, 0, count);
}
return writer.toString();
} finally {
if (stream != null) {
stream.close();
}
}
}
private static String getResponseCharset(String ctype) {
String charset = DEFAULT_CHARSET;
if (!StringUtils.isEmpty(ctype)) {
String[] params = ctype.split(";");
for (String param : params) {
param = param.trim();
if (param.startsWith("charset")) {
String[] pair = param.split("=", 2);
if (pair.length == 2) {
if (!StringUtils.isEmpty(pair[1])) {
charset = pair[1].trim();
}
}
break;
}
}
}
return charset;
}
}
关于:sun.net.www.protocol.http.HttpURLConnection cannot be cast to javax.net.ssl.HttpsURLConnection 异常的处理
原因:
在没有对使用的SSL实现类进行配置的情况下,在程序中如果正常使用java.net.URL的不带 URLStreamHandler 参数的构造方法new 一个URL对象的话,url.openConnection()默认是返回sun.net.www.protocol.http.HttpURLConnection 类型对象。所以我们带上一个URLStreamHandler 参数。
URL url = new URL(null,url,new Handler());
java文件直接可以用的下载:http://download.csdn.net/detail/u012386696/6482487
参考1:http://blog.csdn.net/arvinrong/article/details/7715334
参考2:http://www.cnblogs.com/devinzhang/archive/2012/02/28/2371631.html