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+package com.caimei.module.pay.util;
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+
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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.Iterator;
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+import java.util.List;
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+import java.util.Map;
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+
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+/**
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+ * HTTP 请求工具
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+ */
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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 发送请求的URL
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+ * @param param 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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+ * @throws Exception
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+ */
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+ @SuppressWarnings("unused")
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+ public static String sendGetWithParameter(String url, String param) throws Exception {
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+ StringBuffer result=new StringBuffer();
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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("Accept-Charset", "utf-8");
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+ connection.setRequestProperty("contentType", "utf-8");
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+ connection.setConnectTimeout(5000);
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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)); //关闭响应头的输出
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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.append(line);
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+ }
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+ } catch (Exception e) {
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+ throw e;
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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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+ throw e2;
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+ }
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+ }
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+ return result.toString();
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+ }
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+
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+
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+ @SuppressWarnings("unused")
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+ public static String sendGet(String url) throws Exception {
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+ StringBuffer result=new StringBuffer();
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+ BufferedReader in = null;
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+ try {
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+
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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 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("Accept-Charset", "utf-8");
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+ connection.setRequestProperty("contentType", "utf-8");
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+ connection.setConnectTimeout(5000);
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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.append(line);
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+ }
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+ } catch (Exception e) {
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+ throw e;
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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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+ throw e2;
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+ }
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+ }
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+ return result.toString();
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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 发送请求的 URL
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+ * @param param 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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+ * @throws Exception
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+ */
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+ public static String sendPost(String url, String param) throws Exception {
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+ PrintWriter out = null;
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+ BufferedReader in = null;
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+ StringBuffer result=new StringBuffer();
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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("Accept-Charset", "utf-8");
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+ conn.setRequestProperty("contentType", "utf-8");
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+ conn.setConnectTimeout(5000);
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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.append(line);
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+ }
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+ } catch (Exception e) {
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+ throw e;
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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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+ } catch (Exception ex) {
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+ throw ex;
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+ }
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+ }
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+ return result.toString();
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+ }
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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 发送请求的 URL
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+ * @param paramMap 请求参数
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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, Map<String, ?> paramMap) throws Exception{
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+ PrintWriter out = null;
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+ BufferedReader in = null;
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+ String result = "";
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+
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+ String param = "";
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+ Iterator<String> it = paramMap.keySet().iterator();
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+
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+ while(it.hasNext()) {
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+ String key = it.next();
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+ param += key + "=" + paramMap.get(key) + "&";
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+ }
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+
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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("Accept-Charset", "utf-8");
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+ conn.setRequestProperty("user-agent", "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(new InputStreamReader(conn.getInputStream(), "UTF-8"));
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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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+ throw e;
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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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+ throw ex;
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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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chao