调整电子合同请求中台http，预防隐藏问题

src/main/java/com/hand/elecon/httpost/EleFileUpHttpPost.java

+package com.hand.elecon.httpost;
+
+/**
+ * 修复原代码中连接未关闭等问题
+ *
+ * @author Administrator 2023/06/15 14:55
+ */
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.OutputStreamWriter;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.net.HttpURLConnection;
+import java.net.URL;
+public class EleFileUpHttpPost {
+    public static int httpStatus=200;
+    public static void main(String[] args)
+    {
+      String token=  EleFileUpHttpPost.post("https://cmmpdev.honglinglease.com.cn/hl_cm_dev/oauth/token?client_id=client2&client_secret=secret&grant_type=password&username=admin&password=admin",null,null);
+      System.out.println(token);
+    }
+
+
+
+    public static String post(String strURL, String params, String token)
+    {
+        BufferedReader reader = null;
+        HttpURLConnection connection=null;
+        OutputStream os = null;
+        InputStream is = null;
+        try
+        {
+            URL url = new URL(strURL);
+            connection = (HttpURLConnection)url.openConnection();
+            if ((token != null) && (token != "")) {
+                token = "Bearer " + token;
+                connection.setRequestProperty("Authorization", token);
+            }
+
+            connection.setDoOutput(true);
+            connection.setDoInput(true);
+            connection.setUseCaches(false);
+            connection.setInstanceFollowRedirects(true);
+            connection.setRequestMethod("POST");
+            //设置连接超时时间（必须）
+            connection.setConnectTimeout(150000);
+            //设置读取超时时间（必须）
+            connection.setReadTimeout(150000);
+
+            connection.setRequestProperty("Content-Type", "application/json");
+            connection.connect();
+
+            os = connection.getOutputStream();
+            OutputStreamWriter out = new OutputStreamWriter(os, "UTF-8");
+            out.append(params);
+            out.flush();
+            out.close();
+           if (connection.getResponseCode() == httpStatus) {
+               is = connection.getInputStream();
+               reader = new BufferedReader(new InputStreamReader(is, "UTF-8"));
+
+               String res = "";
+               String line;
+               while ((line = reader.readLine()) != null) {
+                   res = res + line;
+               }
+               reader.close();
+               return res;
+           }else{
+               return "error";
+          }
+        }
+        catch (IOException e) {
+            e.printStackTrace();
+        }finally {
+            //关闭连接
+            // 关闭连接的顺序，如果connection.disconnect()放在stream和reader关闭后调用
+            // 那么将不会关闭客户端和服务器的socket连接,如此会导致脚本结束后,连接强制断开
+            // 所以，如果不需要缓存socket，那么应该首先断开socket连接
+            connection.disconnect();
+            //关闭其他连接
+            if (reader != null) {
+                try {
+                    reader.close();
+                } catch (IOException e) {
+                    e.printStackTrace();
+                }
+            }
+            if (os != null) {
+                try {
+                    os.close();
+                } catch (IOException e) {
+                    e.printStackTrace();
+                }
+            }
+            if (is != null) {
+                try {
+                    is.close();
+                } catch (IOException e) {
+                    e.printStackTrace();
+                }
+            }
+
+        }
+        return "error";
+    }
+}