HttpClient Utils工具类的编写方法分享

java-教程王 Java教程 2022-04-19 14:32:31 16769 1 HttpClient
下文笔者讲述编写一个HttpClient Utils工具类的简介说明,如下所示
package com.java265.httpcomponents;  
 
import org.apache.http.HttpEntity;  
import org.apache.http.HttpHost;  
import org.apache.http.HttpResponse;  
import org.apache.http.NameValuePair;  
import org.apache.http.client.HttpClient;  
import org.apache.http.client.config.RequestConfig;  
import org.apache.http.client.methods.HttpUriRequest;  
import org.apache.http.client.methods.RequestBuilder;  
import org.apache.http.conn.routing.HttpRoute;  
import org.apache.http.impl.client.CloseableHttpClient;  
import org.apache.http.impl.client.HttpClientBuilder;  
import org.apache.http.impl.client.HttpClients;  
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;  
import org.apache.http.message.BasicNameValuePair;  
import org.apache.http.util.EntityUtils;  
    
import java.io.IOException;  
import java.util.*;  
    
public class HttpClientUtils {  
    
    private static PoolingHttpClientConnectionManager connectionManager = null;  
    private static HttpClientBuilder httpBuilder = null;  
    private static RequestConfig requestConfig = null;  
    
    private static int MAXCONNECTION = 10;  
    
    private static int DEFAULTMAXCONNECTION = 5;  
    
    private static String IP = "cnivi.com.cn";  
    private static int PORT = 80;  
    
    static {  
        //设置http的状态参数  
        requestConfig = RequestConfig.custom()  
                .setSocketTimeout(5000)  
                .setConnectTimeout(5000)  
                .setConnectionRequestTimeout(5000)  
                .build();  
    
        HttpHost target = new HttpHost(IP, PORT);  
        connectionManager = new PoolingHttpClientConnectionManager();  
        connectionManager.setMaxTotal(MAXCONNECTION);//客户端总并行链接最大数  
        connectionManager.setDefaultMaxPerRoute(DEFAULTMAXCONNECTION);//每个主机的最大并行链接数  
        connectionManager.setMaxPerRoute(new HttpRoute(target), 20);  
        httpBuilder = HttpClients.custom();  
        httpBuilder.setConnectionManager(connectionManager);  
    }  
    
    public static CloseableHttpClient getConnection() {  
        CloseableHttpClient httpClient = httpBuilder.build();  
        return httpClient;  
    }  
    
    
    public static HttpUriRequest getRequestMethod(Map<String, String> map, String url, String method) {  
        List<NameValuePair> params = new ArrayList<NameValuePair>();  
        Set<Map.Entry<String, String>> entrySet = map.entrySet();  
        for (Map.Entry<String, String> e : entrySet) {  
            String name = e.getKey();  
            String value = e.getValue();  
            NameValuePair pair = new BasicNameValuePair(name, value);  
            params.add(pair);  
        }  
        HttpUriRequest reqMethod = null;  
        if ("post".equals(method)) {  
            reqMethod = RequestBuilder.post().setUri(url)  
                    .addParameters(params.toArray(new BasicNameValuePair[params.size()]))  
                    .setConfig(requestConfig).build();  
        } else if ("get".equals(method)) {  
            reqMethod = RequestBuilder.get().setUri(url)  
                    .addParameters(params.toArray(new BasicNameValuePair[params.size()]))  
                    .setConfig(requestConfig).build();  
        }  
        return reqMethod;  
    }  
    
    public static void main(String args[]) throws IOException {  
        Map<String, String> map = new HashMap<String, String>();  
        map.put("account", "");  
        map.put("password", "");  
    
        HttpClient client = getConnection();  
        HttpUriRequest post = getRequestMethod(map, "http://java265.com/userInfoGet", "post");  
        HttpResponse response = client.execute(post);  
    
        if (response.getStatusLine().getStatusCode() == 200) {  
            HttpEntity entity = response.getEntity();  
            String message = EntityUtils.toString(entity, "utf-8");  
            System.out.println(message);  
        } else {  
            System.out.println("请求失败");  
        }  
    }  
}

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