李鹏飞
6 years ago
2 changed files with 146 additions and 34 deletions
@ -0,0 +1,126 @@ |
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package com.elink.esua.epdc.utils; |
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import java.io.BufferedReader; |
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import java.io.IOException; |
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import java.io.InputStreamReader; |
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import java.io.PrintWriter; |
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import java.net.URL; |
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import java.net.URLConnection; |
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import java.util.List; |
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import java.util.Map; |
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public class HttpRequest { |
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/** |
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* 向指定URL发送GET方法的请求 |
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* |
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* @param url |
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* 发送请求的URL |
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* @param param |
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* 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。 |
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* @return URL 所代表远程资源的响应结果 |
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*/ |
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public static String sendGet(String url, String param) { |
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String result = ""; |
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BufferedReader in = null; |
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try { |
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String urlNameString = url + "?" + param; |
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URL realUrl = new URL(urlNameString); |
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// 打开和URL之间的连接
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URLConnection connection = realUrl.openConnection(); |
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// 设置通用的请求属性
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connection.setRequestProperty("accept", "*/*"); |
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connection.setRequestProperty("connection", "Keep-Alive"); |
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connection.setRequestProperty("user-agent", |
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"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)"); |
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// 建立实际的连接
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connection.connect(); |
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// 获取所有响应头字段
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Map<String, List<String>> map = connection.getHeaderFields(); |
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// 遍历所有的响应头字段
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for (String key : map.keySet()) { |
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System.out.println(key + "--->" + map.get(key)); |
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} |
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// 定义 BufferedReader输入流来读取URL的响应
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in = new BufferedReader(new InputStreamReader( |
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connection.getInputStream())); |
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String line; |
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while ((line = in.readLine()) != null) { |
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result += line; |
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} |
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} catch (Exception e) { |
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System.out.println("发送GET请求出现异常！" + e); |
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e.printStackTrace(); |
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} |
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// 使用finally块来关闭输入流
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finally { |
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try { |
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if (in != null) { |
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in.close(); |
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} |
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} catch (Exception e2) { |
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e2.printStackTrace(); |
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} |
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} |
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return result; |
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} |
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|
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/** |
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* 向指定 URL 发送POST方法的请求 |
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* |
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* @param url |
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* 发送请求的 URL |
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* @param param |
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* 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。 |
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* @return 所代表远程资源的响应结果 |
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*/ |
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public static String sendPost(String url, String param) { |
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PrintWriter out = null; |
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BufferedReader in = null; |
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String result = ""; |
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try { |
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URL realUrl = new URL(url); |
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// 打开和URL之间的连接
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URLConnection conn = realUrl.openConnection(); |
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// 设置通用的请求属性
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conn.setRequestProperty("accept", "*/*"); |
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conn.setRequestProperty("connection", "Keep-Alive"); |
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conn.setRequestProperty("user-agent", |
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"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)"); |
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// 发送POST请求必须设置如下两行
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conn.setDoOutput(true); |
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conn.setDoInput(true); |
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// 获取URLConnection对象对应的输出流
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out = new PrintWriter(conn.getOutputStream()); |
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// 发送请求参数
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out.print(param); |
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// flush输出流的缓冲
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out.flush(); |
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// 定义BufferedReader输入流来读取URL的响应
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in = new BufferedReader( |
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new InputStreamReader(conn.getInputStream())); |
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String line; |
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while ((line = in.readLine()) != null) { |
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result += line; |
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} |
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} catch (Exception e) { |
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System.out.println("发送 POST 请求出现异常！"+e); |
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e.printStackTrace(); |
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} |
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//使用finally块来关闭输出流、输入流
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finally{ |
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try{ |
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if(out!=null){ |
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out.close(); |
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} |
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if(in!=null){ |
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in.close(); |
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} |
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} |
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catch(IOException ex){ |
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ex.printStackTrace(); |
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} |
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} |
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return result; |
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} |
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} |
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