public static String post(String urlStr, String strInfo){
URL localURL;
OutputStream outputStream = null;
OutputStreamWriter outputStreamWriter = null;
InputStream inputStream = null;
InputStreamReader inputStreamReader = null;
BufferedReader reader = null;
StringBuffer resultBuffer = new StringBuffer();
String tempLine = null;
try {
localURL = new URL(urlStr);
URLConnection connection;
connection = localURL.openConnection();
HttpURLConnection httpURLConnection = (HttpURLConnection)connection;
httpURLConnection.setDoOutput(true);
httpURLConnection.setRequestMethod("POST");
httpURLConnection.setRequestProperty("Accept-Charset", DEFAULT_ENCODING);
httpURLConnection.setRequestProperty("Content-Type", "text/xml");
outputStreamWriter = new OutputStreamWriter(httpURLConnection.getOutputStream(),"utf-8");
outputStreamWriter.write(strInfo);
outputStreamWriter.flush();
outputStreamWriter.close();
//接收响应流
inputStream = httpURLConnection.getInputStream();
inputStreamReader = new InputStreamReader(inputStream);
reader = new BufferedReader(inputStreamReader);
while ((tempLine = reader.readLine()) != null) {
resultBuffer.append(tempLine);
}
} catch (IOException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (outputStreamWriter != null) {
outputStreamWriter.close();
}
if (outputStream != null) {
outputStream.close();
}
if (reader != null) {
reader.close();
}
if (inputStreamReader != null) {
inputStreamReader.close();
}
if (inputStream != null) {
inputStream.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return resultBuffer.toString();}
public static String post(String urlStr, String strInfo) {
String reStr="";
try {
URL url = new URL(urlStr);
URLConnection con = url.openConnection();
con.setDoOutput(true);
con.setRequestProperty("Pragma:", "no-cache");
con.setRequestProperty("Cache-Control", "no-cache");
con.setRequestProperty("Content-Type", "text/xml");
OutputStreamWriter out = new OutputStreamWriter(con.getOutputStream());
out.write(new String(strInfo.getBytes("ISO-8859-1"),"UTF-8"));
out.flush();
out.close();
BufferedReader br = new BufferedReader(new InputStreamReader(con.getInputStream(), "utf-8"));
String line = "";
for (line = br.readLine(); line != null; line = br.readLine()) {
reStr += line;
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return reStr;
} public static String post(String urlStr, String data){
String result = null;
//创建默认的httpclient实例
CloseableHttpClient client = HttpClients.createDefault();
//CloseableHttpClient client = new DefaultHttpClient();
StringEntity entity = new StringEntity(data, "UTF-8");
HttpPost post = new HttpPost(urlStr);
post.setEntity(entity);
try{
CloseableHttpResponse response = client.execute(post);
result = EntityUtils.toString(response.getEntity());
System.out.println(result.toString());
response.close();
} catch (ClientProtocolException e1) {
e1.printStackTrace();
} catch (IOException e1) {
e1.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
return result.toString();}
public static String post(String urlStr, String data)throws ClientProtocolException, IOException{
String result = null;
//创建默认的httpclient实例
CloseableHttpClient client = HttpClients.createDefault();
StringEntity entity = new StringEntity(data, "UTF-8");
HttpPost post = new HttpPost(urlStr);
post.setEntity(entity);
CloseableHttpResponse response = client.execute(post);
try{
result = EntityUtils.toString(response.getEntity());
System.out.println(result.toString());
} catch (Exception e) {
e.printStackTrace();
}
finally {
response.close();
}
return result.toString();
}get
public static JSONObject httpRequest(String requestUrl, String requestMethod, String outputStr) {
JSONObject jsonObject = null;
StringBuffer buffer = new StringBuffer();
try {
URL url = new URL(requestUrl);
HttpsURLConnection httpUrlConn = (HttpsURLConnection) url.openConnection();
//httpUrlConn.setSSLSocketFactory(ssf);
httpUrlConn.setDoOutput(true);
httpUrlConn.setDoInput(true);
httpUrlConn.setUseCaches(false);
// 设置请求方式（GET/POST）
httpUrlConn.setRequestMethod(requestMethod);
if ("GET".equalsIgnoreCase(requestMethod))
httpUrlConn.connect();
// 当有数据需要提交时
if (null != outputStr) {
OutputStream outputStream = httpUrlConn.getOutputStream();
// 注意编码格式，防止中文乱码
outputStream.write(outputStr.getBytes("UTF-8"));
outputStream.close();
}
// 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 bufferedReader = new BufferedReader(inputStreamReader);
String str = null;
while ((str = bufferedReader.readLine()) != null) {
buffer.append(str);
}
bufferedReader.close();
inputStreamReader.close();
// 释放资源
inputStream.close();
inputStream = null;
httpUrlConn.disconnect();
jsonObject = JSONObject.fromObject(buffer.toString());
} catch (ConnectException ce) {
log.error("Weixin server connection timed out.");
} catch (Exception e) {
log.error("https request error:{}", e);
}
return jsonObject;
} public static String get(String requestUrl) {
StringBuffer buffer = new StringBuffer();
try {
URL url = new URL(requestUrl);
HttpURLConnection httpUrlConn = (HttpURLConnection) url.openConnection();
httpUrlConn.setDoOutput(false);
httpUrlConn.setDoInput(true);
httpUrlConn.setUseCaches(false);
httpUrlConn.setRequestMethod("GET");
httpUrlConn.connect();
// 将返回的输入流转换成字符串
InputStream inputStream = httpUrlConn.getInputStream();
//InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");
InputStreamReader inputStreamReader = new InputStreamReader(inputStream);
BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
String str = null;
while ((str = bufferedReader.readLine()) != null) {
buffer.append(str);
}
bufferedReader.close();
inputStreamReader.close();
// 释放资源
inputStream.close();
inputStream = null;
httpUrlConn.disconnect();
} catch (Exception e) {
}
return buffer.toString();
} /**
* @Title: getUrl
* @Description: 发起httpGET请求
* @param url
* @return String
*/
public static String getUrl(String url){
String result = null;
//创建默认的httpclient实例
CloseableHttpClient client = HttpClients.createDefault();
//根据地址获取请求
HttpGet get = new HttpGet(url);
//通过请求对象获取响应对象
try {
CloseableHttpResponse response=client.execute(get);
// 判断网络连接状态码是否正常(0--200都数正常)
try{
if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
System.out.println("gqjcHttpUtil getUrl()方法 网络连接状态码正常");
//然而返回的实体内并没有，加这个会报空异常也是没办法
//System.out.println("获取数据编码方式为："+response.getEntity().getContentEncoding().toString());
//要设置编码格式否则中文名有乱码
result= EntityUtils.toString(response.getEntity(), "utf-8");
System.out.println("gqjcHttpUtil result:"+result);
return result;
}
}finally {
response.close();
}
} 原文：http://blog.51cto.com/liujin/2317382