Java 讀取get 和post 介面 工具類整理
阿新 • • 發佈:2018-12-18
package cn.ijiami.mamp.manage.util; import com.alibaba.fastjson.JSONArray; import com.alibaba.fastjson.JSONException; import com.alibaba.fastjson.JSONObject; import java.io.*; import java.lang.reflect.Method; import java.net.URL; import java.net.URLConnection; import java.nio.charset.Charset; import java.util.List; /** * *<p>類描述:介面讀取工具。</p> */ public class ReadUrlUtil { /*** * 加密 * @param s * @return */ public static String cjkEncode(String s) { if (s == null) return ""; StringBuffer stringbuffer = new StringBuffer(); int i = 0; for (int j = s.length(); i < j; i++) { char c = s.charAt(i); if (c >= '\200' || c == '[' || c == ']') { stringbuffer.append("["); stringbuffer.append(Integer.toString(c, 16)); stringbuffer.append("]"); } else { stringbuffer.append(c); } } return stringbuffer.toString(); } public static JSONObject readJsonFromUrl(String url) { InputStream is = null; try { url =cjkEncode(url); is = new URL(url).openStream(); BufferedReader rd = new BufferedReader(new InputStreamReader(is, Charset.forName("UTF-8"))); StringBuilder sb = new StringBuilder(); int cp; while ((cp = rd.read()) != -1) { sb.append((char) cp); } String jsonText = sb.toString(); JSONObject json = JSONObject.parseObject(jsonText); return json; } catch (IOException e) { e.printStackTrace(); } catch (JSONException e1) { e1.printStackTrace(); } finally { if (is != null) { try { is.close(); }catch (IOException e){ e.printStackTrace(); } } } return null; } /** * 向指定 URL 傳送POST方法的請求 * @param url 傳送請求的 URL * @param param 請求引數,請求引數應該是 name1=value1&name2=value2 的形式。 * @return 所代表遠端資源的響應結果 */ public static String sendPost(String url, String param) { PrintWriter out = null; BufferedReader in = null; String result = ""; try { URL realUrl = new URL(url); // 開啟和URL之間的連線 URLConnection conn = realUrl.openConnection(); // 設定通用的請求屬性 conn.setRequestProperty("accept", "*/*"); conn.setRequestProperty("connection", "Keep-Alive"); conn.setRequestProperty("user-agent","Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)"); // 傳送POST請求必須設定如下兩行 conn.setDoOutput(true); conn.setDoInput(true); //1.獲取URLConnection物件對應的輸出流 out = new PrintWriter(conn.getOutputStream()); //2.中文有亂碼的需要將PrintWriter改為如下 //out=new OutputStreamWriter(conn.getOutputStream(),"UTF-8") // 傳送請求引數 out.print(param); // flush輸出流的緩衝 out.flush(); // 定義BufferedReader輸入流來讀取URL的響應 in = new BufferedReader(new InputStreamReader(conn.getInputStream())); String line; while ((line = in.readLine()) != null) { result += line; } } catch (Exception e) { System.out.println("傳送 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(in!=null){ in.close(); } } catch(IOException ex){ ex.printStackTrace(); } } System.out.println("post推送結果:"+result); return result; } /** * 根據屬性名獲取屬性值 * */ public static String getFieldValueByName(String fieldName, Object o) { try { String firstLetter = fieldName.substring(0, 1).toUpperCase(); String getter = "get" + firstLetter + fieldName.substring(1); Method method = o.getClass().getMethod(getter, new Class[] {}); String value = (String)method.invoke(o, new Object[] {}); return value; } catch (Exception e) { e.printStackTrace(); return null; } } public static void main(String[] args) { String url ="http://172.10.3.89:10200/schedule"; /* JSONObject jsonObject = readJsonFromUrl(url); JSONArray jsonArray = JSONArray.parseArray(jsonObject.get("code")+""); //jsonArray.get(1).getClass(). List<Object> list = jsonArray.toJavaList(Object.class);*/ String[] strs = new String[]{}; // JSONObject str = sendPost(url,"project_name=channel_spider&spider_name=app_channel&channel_id=40"); // System.err.println(str); } }