| 提交 | 用户 | 时间 | ||
| a6de49 | 1 | package com.iailab.common.utils; |
| H | 2 | |
| 3 | import java.io.BufferedReader; | |
| 4 | import java.io.IOException; | |
| 5 | import java.io.InputStreamReader; | |
| 6 | import java.io.PrintWriter; | |
| 7 | import java.net.URL; | |
| 8 | import java.net.URLConnection; | |
| 9 | import java.util.List; | |
| 10 | import java.util.Map; | |
| 11 | ||
| 12 | /** | |
| 13 | * @author PanZhibao | |
| 14 | * @date 2021年06月03日 15:31 | |
| 15 | */ | |
| 16 | public class HttpRequest { | |
| 17 | /** | |
| 18 | * 向指定URL发送GET方法的请求 | |
| 19 | * | |
| 20 | * @param url 发送请求的URL | |
| 21 | * @param param 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。 | |
| 22 | * @return URL 所代表远程资源的响应结果 | |
| 23 | */ | |
| 24 | public static String sendGet(String url, String param) { | |
| 25 | String result = ""; | |
| 26 | BufferedReader in = null; | |
| 27 | try { | |
| 28 | String urlNameString = url + "?" + param; | |
| 29 | URL realUrl = new URL(urlNameString); | |
| 30 | // 打开和URL之间的连接 | |
| 31 | URLConnection connection = realUrl.openConnection(); | |
| 32 | // 设置通用的请求属性 | |
| 33 | connection.setRequestProperty("accept", "*/*"); | |
| 34 | connection.setRequestProperty("connection", "Keep-Alive"); | |
| 35 | connection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)"); | |
| 36 | ||
| 37 | // 建立实际的连接 | |
| 38 | connection.connect(); | |
| 39 | // 获取所有响应头字段 | |
| 40 | Map<String, List<String>> map = connection.getHeaderFields(); | |
| 41 | // 遍历所有的响应头字段 | |
| 42 | for (String key : map.keySet()) { | |
| 43 | System.out.println(key + "--->" + map.get(key)); | |
| 44 | } | |
| 45 | // 定义 BufferedReader输入流来读取URL的响应 | |
| 46 | in = new BufferedReader(new InputStreamReader(connection.getInputStream())); | |
| 47 | String line; | |
| 48 | while ((line = in.readLine()) != null) { | |
| 49 | result += line; | |
| 50 | } | |
| 51 | } catch (Exception e) { | |
| 52 | System.out.println("发送GET请求出现异常！" + e); | |
| 53 | e.printStackTrace(); | |
| 54 | } | |
| 55 | // 使用finally块来关闭输入流 | |
| 56 | finally { | |
| 57 | try { | |
| 58 | if (in != null) { | |
| 59 | in.close(); | |
| 60 | } | |
| 61 | } catch (Exception e2) { | |
| 62 | e2.printStackTrace(); | |
| 63 | } | |
| 64 | } | |
| 65 | return result; | |
| 66 | } | |
| 67 | ||
| 68 | /** | |
| 69 | * 向指定 URL 发送POST方法的请求 | |
| 70 | * | |
| 71 | * @param url 发送请求的 URL | |
| 72 | * @param param 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。 | |
| 73 | * @return 所代表远程资源的响应结果 | |
| 74 | */ | |
| 75 | public static String sendPost(String url, String param) { | |
| 76 | PrintWriter out = null; | |
| 77 | BufferedReader in = null; | |
| 78 | String result = ""; | |
| 79 | try { | |
| 80 | URL realUrl = new URL(url); | |
| 81 | // 打开和URL之间的连接 | |
| 82 | URLConnection conn = realUrl.openConnection(); | |
| 83 | // 设置通用的请求属性 | |
| 84 | conn.setRequestProperty("accept", "*/*"); | |
| 85 | conn.setRequestProperty("connection", "Keep-Alive"); | |
| 86 | conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)"); | |
| 87 | ||
| 88 | // 发送POST请求必须设置如下两行 | |
| 89 | conn.setDoOutput(true); | |
| 90 | conn.setDoInput(true); | |
| 91 | // 获取URLConnection对象对应的输出流 | |
| 92 | out = new PrintWriter(conn.getOutputStream()); | |
| 93 | // 发送请求参数 | |
| 94 | out.print(param); | |
| 95 | // flush输出流的缓冲 | |
| 96 | out.flush(); | |
| 97 | // 定义BufferedReader输入流来读取URL的响应 | |
| 98 | in = new BufferedReader(new InputStreamReader(conn.getInputStream())); | |
| 99 | String line; | |
| 100 | while ((line = in.readLine()) != null) { | |
| 101 | result += line; | |
| 102 | } | |
| 103 | } catch (Exception e) { | |
| 104 | System.out.println("发送 POST 请求出现异常！" + e); | |
| 105 | e.printStackTrace(); | |
| 106 | } | |
| 107 | //使用finally块来关闭输出流、输入流 | |
| 108 | finally { | |
| 109 | try { | |
| 110 | if (out != null) { | |
| 111 | out.close(); | |
| 112 | } | |
| 113 | if (in != null) { | |
| 114 | in.close(); | |
| 115 | } | |
| 116 | } catch (IOException ex) { | |
| 117 | ex.printStackTrace(); | |
| 118 | } | |
| 119 | } | |
| 120 | return result; | |
| 121 | } | |
| 122 | } | |
