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- package qh.lqg.utils.net;
- import java.io.BufferedReader;
- import java.io.IOException;
- import java.io.InputStreamReader;
- 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", "*/*");
- conn.setRequestProperty("connection", "Keep-Alive");
- 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
- out = new PrintWriter(conn.getOutputStream());
- // 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()));
- 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;
- }
- }
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