Question

java如何调用对方http接口 新手虚心求教

Answer 1

import java.io.BufferedReader;  
import java.io.DataOutputStream;  
import java.io.InputStreamReader;  
import java.net.HttpURLConnection;  
import java.net.URL;  
import java.net.URLEncoder;  
  
public class DemoTest1 {  
  
    public static final String GET_URL = "http://112.4.27.9/mall-back/if_user/store_list?storeId=32";  
//    public static final String POST_URL = "http://112.4.27.9/mall-back/if_user/store_list";  
    // 妙兜测试接口  
    public static final String POST_URL = "http://121.40.204.191:8180/mdserver/service/installLock";  
      
    /** 
     * 接口调用 GET 
     */  
    public static void httpURLConectionGET() {  
        try {  
            URL url = new URL(GET_URL);    // 把字符串转换为URL请求地址  
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();// 打开连接  
            connection.connect();// 连接会话  
            // 获取输入流  
            BufferedReader br = new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8"));  
            String line;  
            StringBuilder sb = new StringBuilder();  
            while ((line = br.readLine()) != null) {// 循环读取流  
                sb.append(line);  
            }  
            br.close();// 关闭流  
            connection.disconnect();// 断开连接  
            System.out.println(sb.toString());  
        } catch (Exception e) {  
            e.printStackTrace();  
            System.out.println("失败!");  
        }  
    }  
      
    /** 
     * 接口调用  POST 
     */  
    public static void httpURLConnectionPOST () {  
        try {  
            URL url = new URL(POST_URL);  
              
            // 将url 以 open方法返回的urlConnection  连接强转为HttpURLConnection连接  (标识一个url所引用的远程对象连接)  
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();// 此时cnnection只是为一个连接对象,待连接中  
              
            // 设置连接输出流为true,默认false (post 请求是以流的方式隐式的传递参数)  
            connection.setDoOutput(true);  
              
            // 设置连接输入流为true  
            connection.setDoInput(true);  
              
            // 设置请求方式为post  
            connection.setRequestMethod("POST");  
              
            // post请求缓存设为false  
            connection.setUseCaches(false);  
              
            // 设置该HttpURLConnection实例是否自动执行重定向  
            connection.setInstanceFollowRedirects(true);  
              
            // 设置请求头里面的各个属性 (以下为设置内容的类型,设置为经过urlEncoded编码过的from参数)  
            // application/x-javascript text/xml->xml数据 application/x-javascript->json对象 application/x-www-form-urlencoded->表单数据  
            // ;charset=utf-8 必须要，不然妙兜那边会出现乱码【★★★★★】  
            connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded;charset=utf-8");     
              
            // 建立连接 (请求未开始,直到connection.getInputStream()方法调用时才发起,以上各个参数设置需在此方法之前进行)  
            connection.connect();  
              
            // 创建输入输出流,用于往连接里面输出携带的参数,(输出内容为?后面的内容)  
            DataOutputStream dataout = new DataOutputStream(connection.getOutputStream());  
              
            String app_key = "app_key="+ URLEncoder.encode("4f7bf8c8260124e6e9c6bf094951a111", "utf-8");        // 已修改【改为错误数据，以免信息泄露】  
            String agt_num = "&agt_num="+ URLEncoder.encode("10111", "utf-8");              // 已修改【改为错误数据，以免信息泄露】  
            String pid = "&pid="+ URLEncoder.encode("BLZXA150401111", "utf-8");             // 已修改【改为错误数据，以免信息泄露】  
            String departid = "&departid="+ URLEncoder.encode("10007111", "utf-8");         // 已修改【改为错误数据，以免信息泄露】  
            String install_lock_name = "&install_lock_name="+ URLEncoder.encode("南天大门", "utf-8");  
            String install_address = "&install_address="+ URLEncoder.encode("北京育新", "utf-8");  
            String install_gps = "&install_gps="+ URLEncoder.encode("116.350888,40.011001", "utf-8");  
            String install_work = "&install_work="+ URLEncoder.encode("小李", "utf-8");  
            String install_telete = "&install_telete="+ URLEncoder.encode("13000000000", "utf-8");  
            String intall_comm = "&intall_comm="+ URLEncoder.encode("一切正常", "utf-8");  
              
            // 格式 parm = aaa=111&bbb=222&ccc=333&ddd=444  
            String parm = app_key+ agt_num+ pid+ departid+ install_lock_name+ install_address+ install_gps+ install_work+ install_telete+ intall_comm;  
              
            // 将参数输出到连接  
            dataout.writeBytes(parm);  
              
            // 输出完成后刷新并关闭流  
            dataout.flush();  
            dataout.close(); // 重要且易忽略步骤 (关闭流,切记!)   
              
//            System.out.println(connection.getResponseCode());  
              
            // 连接发起请求,处理服务器响应  (从连接获取到输入流并包装为bufferedReader)  
            BufferedReader bf = new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8"));   
            String line;  
            StringBuilder sb = new StringBuilder(); // 用来存储响应数据  
              
            // 循环读取流,若不到结尾处  
            while ((line = bf.readLine()) != null) {  
//                sb.append(bf.readLine());  
                sb.append(line).append(System.getProperty("line.separator"));  
            }  
            bf.close();    // 重要且易忽略步骤 (关闭流,切记!)   
            connection.disconnect(); // 销毁连接  
            System.out.println(sb.toString());  
      
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
    }  
      
    public static void main(String[] args) {  
//        httpURLConectionGET();  
        httpURLConnectionPOST();  
    }  
}