最近寫的restful風格接口（post請求）

//發送post請求的方法，這個方法直接調用就行，url的值是固定的，難點在於param字符串參數拼接，個人的建議是，如果是json的形式，先在postman上面跑一下，然后把參數復制到idea上，會自動拼接
public static String insureResponsePost(String url, String param) {
PrintWriter out = null;
InputStream is = null;
BufferedReader br = null;
String result = "";
HttpURLConnection conn = null;
StringBuffer strBuffer = new StringBuffer();
try {
URL realUrl = new URL(url);
conn = (HttpURLConnection) realUrl.openConnection();
// 設置通用的請求屬性
conn.setRequestMethod( "POST");
conn.setConnectTimeout(20000);
conn.setReadTimeout(300000);
conn.setRequestProperty("Charset", "UTF-8");
// 傳輸數據為json，如果為其他格式可以進行修改
conn.setRequestProperty( "Content-Type", "application/json");
conn.setRequestProperty( "Content-Encoding", "utf-8");
// 發送POST請求必須設置如下兩行
conn.setDoOutput( true);
conn.setDoInput( true);
conn.setUseCaches( false);
// 獲取URLConnection對象對應的輸出流
out = new PrintWriter(conn.getOutputStream());
// 發送請求參數
out.print(param);
// flush輸出流的緩沖
out.flush();
is = conn.getInputStream();
br = new BufferedReader( new InputStreamReader(is));
String line = null;
while ((line=br.readLine())!= null) {
strBuffer.append(line);
}
result = strBuffer.toString();
} catch (Exception e) {
System. out.println( "發送 POST 請求出現異常！" + e);
e.printStackTrace();
}
// 使用finally塊來關閉輸出流、輸入流
finally {
try {
if (out != null) {
out.close();
}
if (br != null) {
br.close();
}
if (conn!= null) {
conn.disconnect();
}
} catch (IOException ex) {
ex.printStackTrace();
}
}
return result;
}