package com.dsh.utils;
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import com.alibaba.fastjson.JSONObject;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import org.apache.http.NameValuePair;
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import org.apache.http.client.entity.UrlEncodedFormEntity;
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import org.apache.http.client.methods.CloseableHttpResponse;
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import org.apache.http.client.methods.HttpGet;
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import org.apache.http.client.methods.HttpPost;
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import org.apache.http.client.utils.URIBuilder;
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import org.apache.http.entity.ContentType;
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import org.apache.http.entity.StringEntity;
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import org.apache.http.impl.client.CloseableHttpClient;
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import org.apache.http.impl.client.HttpClients;
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import org.apache.http.message.BasicNameValuePair;
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import org.apache.http.util.EntityUtils;
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import java.io.*;
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import java.net.HttpURLConnection;
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import java.net.URI;
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import java.net.URL;
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import java.net.URLConnection;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.Map;
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/**
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* @author 张鹏
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* @date 2020/8/31 17:59
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* http util
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*/
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public class HttpTemplate {
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private static Log logger = LogFactory.getLog(HttpTemplate.class);
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/**
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* 向指定URL发送GET方式的请求
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* @param url 发送请求的URL
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* @param param 请求参数
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* @return URL 代表远程资源的响应
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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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String urlName = url;
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if (param.length() != 0) {
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urlName = url + "?" + param;
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}
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try{
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URL realUrl = new URL(urlName);
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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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//建立实际的连接
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conn.connect();
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//获取所有的响应头字段
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Map<String,List<String>> map = conn.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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BufferedReader in = new BufferedReader(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GET请求出现异常" + e);
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e.printStackTrace();
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logger.error("/HttpTemplate/sendGet",e);
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}
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return result;
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}
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/**
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* 向指定URL发送POST方式的请求
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* @param url 发送请求的URL
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* @param param 请求参数
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* @return URL 代表远程资源的响应
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*/
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public static String sendPost(String url, String param){
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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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conn.setRequestProperty("Content-Type","application/json");
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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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PrintWriter 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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BufferedReader 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 += "\n" + 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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logger.error("/HttpTemplate/sendPost",e);
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}
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return result;
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}
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}
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