工具类HttpClientUtil

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字数统计: 643 字 | 阅读时长 ≈ 3 min

HttpClientUtil

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package com.jinbei.common.util;

import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.entity.UrlEncodedFormEntity;
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.client.utils.URIBuilder;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

/**
 * @program: UnifiedBgManage
 * @description: HttpClient工具类
 * @author: WYuyin
 * @create: 2018-11-22 13:18
 **/
public class HttpClientUtil {

    private static CloseableHttpClient client = HttpClientBuilder.create().build();

    public static String doGet(String url, Map<String, String> param,Map<String,String> headers) {
        String resultString = "";
        CloseableHttpResponse response = null;
        try {
            URIBuilder uri = new URIBuilder(url);
                if (param != null) {
                    for (String key : param.keySet()) {
                        uri.addParameter(key, param.get(key));
                    }
                }
            HttpGet get = new HttpGet(uri.build());
                if (headers != null){
                    for (String key :headers.keySet()) {
                        get.setHeader(key,headers.get(key));
                    }
                }

                response = client.execute(get);

                if (response.getStatusLine().getStatusCode() == 200){
                    resultString = EntityUtils.toString(response.getEntity(), "UTF-8");
                }

            } catch (URISyntaxException e) {
            e.printStackTrace();
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            try {
                if (response != null){
                    response.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    return resultString;
    }

    public static String doGet(String url){
        return doGet(url,null,null);
    }

    public static String doGet(String url, Map<String, String> param){
        return doGet(url,param,null);
    }

    public static String doPost(String url, Map<String, String> param,Map<String,String> headers){
        String resultString = "";
        CloseableHttpResponse response = null;
        try {
            HttpPost httpPost = new HttpPost(url);
            if (param != null){
                List<NameValuePair> paramList = new ArrayList<>();
                for (String key : param.keySet()) {
                    paramList.add(new BasicNameValuePair(key, param.get(key)));
                }
                // 模拟表单
                UrlEncodedFormEntity entity = new UrlEncodedFormEntity(paramList,"utf-8");
                httpPost.setEntity(entity);
            }
            if (headers != null){
                for (String key :headers.keySet()) {
                    httpPost.setHeader(key,headers.get(key));
                }
            }

            response = client.execute(httpPost);
            resultString = EntityUtils.toString(response.getEntity(),"UTF-8");
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                response.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return resultString;
    }

    public static String doPost(String url, Map<String, String> param) {
        return doPost(url,param,null);
    }
    public static String doPost(String url){
        return doPost(url,null,null);
    }
}

最好使用doPost，doGet不太安全

HttpClient的精简用法

之前学习了HttpClient的用法，也自己包了一个工具类，前两天看了大佬的代码，

1546915517113

我称其为HttpClient的精简用法吧，这省了很多事情，起码自己不用去归纳一套流程了，熟练了也是非常方便的，而且还适应了各种情景：加请求头，参数，编码，timeout时间，真的是非常便捷了，emm 请忽略我截图里面多了一个bodyForm的操作。

改响应数据编码为utf-8我找了好久，最后就在自动显示的所有方法里看到有个加Charset参数的，开心(^▽^)