java实现Http post（参数json格式）、get 请求的HttpUtil工具类

java代码实现http请求工具类封装

参数介绍：

get方式请求：url：请求地址的字符串

post方式请求：url：请求地址的字符串

                     jsonString：json字符串 

注意：json字符串的生成的方法如下

需要封装的json格式如下：

    {
           "touser":"OPENID",
           "template_id":"ngqIpbwh8bUfcSsECmogfXcV14J0tQlEpBO27izEYtY",         
           "data":{
                   "first": {
                       "value":"恭喜你审核通过！",
                       "color":"#173177"
                   },
                   "keyword1":{
                       "value":"中心",
                       "color":"#173177"
                   },
                   "keyword2": {
                       "value":"移动开发",
                       "color":"#173177"
                   },
                   "remark":{
                       "value":"点击进入",
                       "color":"#173177"
                   }
           }
       }

java代码转json字符串：

                    Map<String, Object> params=new HashMap<String,Object>();
                    Map<String, Object> data=new HashMap<String,Object>();
                    Map<String, Object> first=new HashMap<String,Object>();
                    Map<String, Object> keyword1=new HashMap<String,Object>();
                    Map<String, Object> keyword2=new HashMap<String,Object>();
                    Map<String, Object> remark=new HashMap<String,Object>();
                    remark.put("value", "点击进入");
                    remark.put("color", "#173177");
                    keyword2.put("value", "移动开发");
                    keyword2.put("color", "#173177");
                    keyword1.put("value", "中心");
                    keyword1.put("color", "#173177");
                    first.put("value", "恭喜你审核通过");
                    first.put("color", "#173177");
                    data.put("first", first);
                    data.put("keyword1", keyword1);
                    data.put("keyword2", keyword2);
                    data.put("remark", remark);
                    params.put("touser", openid);
                    params.put("template_id", "");
                    params.put("data", data);
                    String  paramString= JSON.toJSONString(params);

另外，也可以用转移字符直接“\” 将双引号直接转成字符串内容。

java实现http的get、post请求工具类：

package com.css.sword.swordkb.web;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.nio.charset.Charset;

import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;

public class HttpUtil {
    private static CloseableHttpClient httpClient;

    static {
        PoolingHttpClientConnectionManager cm = new PoolingHttpClientConnectionManager();
        cm.setMaxTotal(100);
        cm.setDefaultMaxPerRoute(20);
        cm.setDefaultMaxPerRoute(50);
        httpClient = HttpClients.custom().setConnectionManager(cm).build();
    }

    public static String get(String url) {
        CloseableHttpResponse response = null;
        BufferedReader in = null;
        String result = "";
        try {
            HttpGet httpGet = new HttpGet(url);
            RequestConfig requestConfig = RequestConfig.custom().setConnectTimeout(30000).setConnectionRequestTimeout(30000).setSocketTimeout(30000).build();
            httpGet.setConfig(requestConfig);
            httpGet.setConfig(requestConfig);
            httpGet.addHeader("Content-type", "application/json; charset=utf-8");
            httpGet.setHeader("Accept", "application/json");
            response = httpClient.execute(httpGet);
            in = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
            StringBuffer sb = new StringBuffer("");
            String line = "";
            String NL = System.getProperty("line.separator");
            while ((line = in.readLine()) != null) {
                sb.append(line + NL);
            }
            in.close();
            result = sb.toString();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                if (null != response) {
                    response.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return result;
    }

    public static String post(String url, String jsonString) {
        CloseableHttpResponse response = null;
        BufferedReader in = null;
        String result = "";
        try {
            HttpPost httpPost = new HttpPost(url);
            RequestConfig requestConfig = RequestConfig.custom().setConnectTimeout(30000).setConnectionRequestTimeout(30000).setSocketTimeout(30000).build();
            httpPost.setConfig(requestConfig);
            httpPost.setConfig(requestConfig);
            httpPost.addHeader("Content-type", "application/json; charset=utf-8");
            httpPost.setHeader("Accept", "application/json");
            httpPost.setEntity(new StringEntity(jsonString, Charset.forName("UTF-8")));
            response = httpClient.execute(httpPost);
            in = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
            StringBuffer sb = new StringBuffer("");
            String line = "";
            String NL = System.getProperty("line.separator");
            while ((line = in.readLine()) != null) {
                sb.append(line + NL);
            }
            in.close();
            result = sb.toString();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                if (null != response) {
                    response.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return result;
    }

}

http工具下载地址：[ https://download.csdn.net/download/zhuchenglin830/11199987]