首先,创建一个HttpRequest工具类
package com.bonc.common.utils; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.io.OutputStreamWriter; import java.io.PrintWriter; import java.net.URL; import java.net.URLConnection; import java.util.List; import java.util.Map; public class HttpRequest { /** * 向指定URL发送GET方法的请求 * * @param url * 发送请求的URL * @param param * 请求参数,请求参数应该是 name1=value1&name2=value2 的形式。 * @return URL 所代表远程资源的响应结果 */ public static String sendGet(String url, String param) { String result = ""; BufferedReader in = null; try { String urlNameString = url + "?" + param; URL realUrl = new URL(urlNameString); // 打开和URL之间的连接 URLConnection connection = realUrl.openConnection(); // 设置通用的请求属性 connection.setRequestProperty("accept", "*/*"); connection.setRequestProperty("connection", "Keep-Alive"); connection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)"); // 建立实际的连接 connection.connect(); // 获取所有响应头字段 Map<String, List<String>> map = connection.getHeaderFields(); // 遍历所有的响应头字段 for (String key : map.keySet()) { System.out.println(key + "--->" + map.get(key)); } // 定义 BufferedReader输入流来读取URL的响应 in = new BufferedReader(new InputStreamReader( connection.getInputStream())); String line; while ((line = in.readLine()) != null) { result += line; } } catch (Exception e) { System.out.println("发送GET请求出现异常!" + e); e.printStackTrace(); } // 使用finally块来关闭输入流 finally { try { if (in != null) { in.close(); } } catch (Exception e2) { e2.printStackTrace(); } } return result; } /** * 向指定 URL 发送POST方法的请求 * * @param url * 发送请求的 URL * @param param * 请求参数,请求参数应该是 name1=value1&name2=value2 的形式。 * @return 所代表远程资源的响应结果 */ public static String sendPost(String url, String param) { PrintWriter out = null; BufferedReader in = null; String result = ""; try { URL realUrl = new URL(url); // 打开和URL之间的连接 URLConnection conn = realUrl.openConnection(); // 设置通用的请求属性 conn.setRequestProperty("accept", "application/json, text/javascript, */*; q=0.01"); conn.setRequestProperty("Accept-Encoding", "gzip, deflate"); conn.setRequestProperty("Connection", "keep-alive"); conn.setRequestProperty("Accept-Language", "zh-CN,zh;q=0.8"); conn.setRequestProperty("Content-Length", "80"); conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8"); conn.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36"); conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)"); // 发送POST请求必须设置如下两行 conn.setDoOutput(true); conn.setDoInput(true); // 获取URLConnection对象对应的输出流 OutputStreamWriter outWriter = new OutputStreamWriter(conn.getOutputStream(), "utf-8"); out = new PrintWriter(outWriter); // 发送请求参数 out.print(param); // flush输出流的缓冲 out.flush(); // 定义BufferedReader输入流来读取URL的响应 in = new BufferedReader( new InputStreamReader(conn.getInputStream(),"UTF-8")); String line; while ((line = in.readLine()) != null) { result += line; } } catch (Exception e) { System.out.println("发送 POST 请求出现异常!"+e); e.printStackTrace(); } //使用finally块来关闭输出流、输入流 finally{ try{ if(out!=null){ out.close(); } if(in!=null){ in.close(); } } catch(IOException ex){ ex.printStackTrace(); } } return result; } public static void main(String[] args) { //发送 GET 请求 /* String s=HttpRequest.sendGet("http://localhost:6144/Home/RequestString", "key=123&v=456"); System.out.println(s);*/ //发送 POST 请求 /* String sr=HttpRequest.sendPost("http://www.cheshouye.com/api/weizhang/get_all_config",""); JSONObject jsStr = JSONObject.fromObject(sr); JSONArray jsonarray = jsStr.getJSONArray("configs"); for(int i=0;i<jsonarray.size();i++){ JSONObject ob1=(JSONObject)jsonarray.get(i); Integer provinceId=ob1.getInt("provice_id"); String provinceName=ob1.getString("provice_name"); String provinceShortName=ob1.getString("provice_short_name"); JSONArray jsonarray2 = ob1.getJSONArray("citys"); } System.out.println(jsonarray);*/ //(JSONObject)jsonarray[i] } }
然后在java方法中调用即可。第一个参数是地址,第二个是需要传输的参数,需要把传输的参数转化成字符串。然后会把结果返回
Map<String,String> p=new HashMap<>(); p.put("pushType","ALIAS"); p.put("alert",re); p.put("target",userId); p.put("msgCode","1005"); p.put("orderNum",""); p.put("activityId",id); String s=""; for (Map.Entry<String, String> entry : p.entrySet()) { s+="&"+entry.getKey()+"="+entry.getValue(); } s=s.substring(1); String sr= HttpRequest.sendPost("http://112.64.35.222:9002/itcast/jpush/push",s);