http请求代码

package com.cczu.util.common;


import com.alibaba.fastjson.JSONObject;
import com.cczu.sys.comm.mapper.JsonMapper;
import org.apache.http.HttpEntity;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpPut;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
import org.apache.log4j.LogManager;
import org.apache.log4j.Logger;

import javax.servlet.http.HttpServletRequest;
import java.io.*;
import java.net.*;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;

public class HttpUtil {

    /**
     * 日志
     */
    private static Logger log = LogManager.getLogger(HttpUtil.class);

    /**
     * 向指定URL发送GET方法的请求
     * 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
     *
     * @param url 发送请求的URL
     * @return URL 所代表远程资源的响应结果
     */
    public static String sendGet(String url) {
        StringBuilder result = new StringBuilder();
        BufferedReader in = null;
        try {
            URL realUrl = new URL(url);
            // 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)");
            connection.setRequestProperty("Accept-Charset", "UTF-8");
            connection.setRequestProperty("contentType", "UTF-8");
            // 建立实际的连接  
            connection.connect();
            // 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(), "utf-8"));
            String line;
            while ((line = in.readLine()) != null) {
                result.append(line);
            }
        } catch (Exception e) {
//          System.out.println("发送GET请求出现异常！" + e);  
            result = new StringBuilder("{"resCode":"10000","errCode":"1001","resData":""}");
            e.printStackTrace();
            log.error("远程服务未开启", e);
        }
        // 使用finally块来关闭输入流  
        finally {
            try {
                if (in != null) {
                    in.close();
                }
            } catch (Exception e2) {
                e2.printStackTrace();
            }
        }

        return result.toString();
    }

    /**
     * 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;
        StringBuilder result = new StringBuilder();
        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)");
            conn.setRequestProperty("Accept-Charset", "UTF-8");
            conn.setRequestProperty("contentType", "UTF-8");
            // 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());  
            out = new PrintWriter(new OutputStreamWriter(conn.getOutputStream(), "utf-8"));
            // 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(), "UTF-8"));
            String line;
            while ((line = in.readLine()) != null) {
                result.append(line);
            }
        } catch (Exception e) {
//          System.out.println("发送 POST 请求出现异常！" + e);  
            result = new StringBuilder("{"resCode":"1","errCode":"1000","resData":""}");
            e.printStackTrace();
            log.error("远程服务未开启", e);
        }
        // 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.toString();
    }

    /**
     * 向指定URL发送GET方法的请求   返回  状态码
     * 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
     *
     * @param url 发送请求的URL
     */
    public static int responseCodeGet(String url) {
        int code = 0;
        try {
            URL realUrl = new URL(url);
            // 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)");
            connection.setRequestProperty("Accept-Charset", "UTF-8");
            connection.setRequestProperty("contentType", "UTF-8");
            //设置超时判断 100毫秒
            connection.setConnectTimeout(100);
            // 建立实际的连接
            connection.connect();
            code = ((HttpURLConnection) connection).getResponseCode();


        } catch (SocketTimeoutException e) {
            System.out.println("连接超时");
        } catch (Exception e) {
            System.out.println("远程服务未开启");
        }

        return code;
    }


    /**
     * 原生字符串发送put请求
     *
     * @param url
     * @param token
     * @param jsonStr
     * @return
     * @throws ClientProtocolException
     * @throws IOException
     */
    public static String sendPut(String url, String jsonStr) {

        CloseableHttpClient httpClient = HttpClients.createDefault();
        HttpPut httpPut = new HttpPut(url);
        RequestConfig requestConfig = RequestConfig.custom().setConnectTimeout(35000).setConnectionRequestTimeout(35000).setSocketTimeout(60000).build();
        httpPut.setConfig(requestConfig);
        httpPut.setHeader("Content-type", "application/json");
        httpPut.setHeader("DataEncoding", "UTF-8");

        CloseableHttpResponse httpResponse = null;
        try {
            httpPut.setEntity(new StringEntity(jsonStr));
            httpResponse = httpClient.execute(httpPut);
            HttpEntity entity = httpResponse.getEntity();
            String result = EntityUtils.toString(entity);
            return result;
        } catch (ClientProtocolException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } finally {
            if (httpResponse != null) {
                try {
                    httpResponse.close();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
            if (null != httpClient) {
                try {
                    httpClient.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return null;
    }

    /**
     * 发送json
     * @param url
     * @param data
     * @return
     */
    public static String sendPostJson(String url, String data) {
        String response = null;

        try {
            CloseableHttpClient httpclient = null;
            CloseableHttpResponse httpresponse = null;
            try {
                httpclient = HttpClients.createDefault();
                HttpPost httppost = new HttpPost(url);
                StringEntity stringentity = new StringEntity(data,
                        ContentType.create("text/json", "UTF-8"));
                httppost.setEntity(stringentity);
                httpresponse = httpclient.execute(httppost);
                response = EntityUtils
                        .toString(httpresponse.getEntity());

            } finally {
                if (httpclient != null) {
                    httpclient.close();
                }
                if (httpresponse != null) {
                    httpresponse.close();
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return response;
    }

/**
*转码
*/
    public static String  toEncode(String params){
        try {
            return URLEncoder.encode(params, "utf-8");
        } catch (UnsupportedEncodingException e) {
            log.error("转码错误",e);
        }
        return params;
    }


}