public static String postHttp(String url, Map<String, String> params) {
URL u = null;
HttpURLConnection con = null;
// 构建请求参数
StringBuffer sb = new StringBuffer();
if (params != null) {
for (Map.Entry<String, String> e : params.entrySet()) {
sb.append(e.getKey());
sb.append("=");
sb.append(e.getValue());
sb.append("&");
}
sb.substring(0, sb.length() - 1);
}
System.out.println("send_url:" + url);
System.out.println("send_data:" + sb.toString());
// 尝试发送请求
try {
u = new URL(url);
con = (HttpURLConnection) u.openConnection();
//// POST 只能为大写，严格限制，post会不识别
con.setRequestMethod("POST");
con.setDoOutput(true);
con.setDoInput(true);
con.setUseCaches(false);
con.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
OutputStreamWriter osw = new OutputStreamWriter(con.getOutputStream(), "UTF-8");
osw.write(sb.toString());
osw.flush();
osw.close();
} catch (Exception e) {
e.printStackTrace();
} finally {
if (con != null) {
con.disconnect();
}
}
// 读取返回内容
StringBuffer buffer = new StringBuffer();
try {
//一定要有返回值，否则无法把请求发送给server端。
BufferedReader br = new BufferedReader(new InputStreamReader(con.getInputStream(), "UTF-8"));
String temp;
while ((temp = br.readLine()) != null) {
buffer.append(temp);
buffer.append("\n");
}
} catch (Exception e) {
e.printStackTrace();
}
return buffer.toString();
}起因：javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorExcepti....post请求报错
