HttpUtils request tool class code

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.Map;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.config.RequestConfig;
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.methods.HttpRequestBase;
import org.apache.http.client.utils.URIBuilder;
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;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import com.pingan.qhcs.map.audit.constant.CodeConstant;
import com.pingan.qhcs.map.audit.exception.MapException;
public class HttpClientUtil {
protected static Log logger = LogFactory.getLog(HttpClientUtil.class);    
private static PoolingHttpClientConnectionManager cm;
private static String EMPTY_STR = "";
private static String UTF_8 = "UTF-8";
private static void init() {
if (cm == null) {
            cm = new PoolingHttpClientConnectionManager();
            cm.setMaxTotal(50);// 整个连接池最大连接数cm.setDefaultMaxPerRoute(5);// 每路由最大连接数，默认值是2        }
    }/** * 通过连接池获取HttpClient
     * 
     * @return */public static CloseableHttpClient getHttpClient() {
        init();return HttpClients.custom().setConnectionManager(cm).build();
    }public static String httpGetRequest(String url) {
        HttpGet httpGet = new HttpGet(url);return getResult(httpGet);
    }public static String httpGetRequest(String url, Map<string> params) throws URISyntaxException {
        URIBuilder ub = new URIBuilder();
        ub.setPath(url);

        ArrayList<namevaluepair> pairs = covertParams2NVPS(params);
        ub.setParameters(pairs);

        HttpGet httpGet = new HttpGet(ub.build());        return getResult(httpGet);
    }public static String httpGetRequest(String url, Map<string> headers, Map<string> params)throws URISyntaxException {
        URIBuilder ub = new URIBuilder();
        ub.setPath(url);

        ArrayList<namevaluepair> pairs = covertParams2NVPS(params);
        ub.setParameters(pairs);

        HttpGet httpGet = new HttpGet(ub.build());for (Map.Entry<string> param : headers.entrySet()) {
            httpGet.addHeader(param.getKey(), String.valueOf(param.getValue()));
        }return getResult(httpGet);
    }
    public static String httpPostRequest(String url) {
        HttpPost httpPost = new HttpPost(url);return getResult(httpPost);
    }
    public static String httpPostRequest(String url, Map<string> params) throws UnsupportedEncodingException {
        HttpPost httpPost = new HttpPost(url);
        ArrayList<namevaluepair> pairs = covertParams2NVPS(params);
        httpPost.setEntity(new UrlEncodedFormEntity(pairs, UTF_8));return getResult(httpPost);
    }
    public static String httpPostRequest(String url, Map<string> headers, Map<string> params)throws UnsupportedEncodingException {
        HttpPost httpPost = new HttpPost(url);
        for (Map.Entry<string> param : headers.entrySet()) {
            httpPost.addHeader(param.getKey(), String.valueOf(param.getValue()));
        }

        ArrayList<namevaluepair> pairs = covertParams2NVPS(params);
        httpPost.setEntity(new UrlEncodedFormEntity(pairs, UTF_8));return getResult(httpPost);
    }
    public static String httpPostRequest(String url, Map<string> headers, String strBody)throws Exception {
        HttpPost httpPost = new HttpPost(url);for (Map.Entry<string> param : headers.entrySet()) {
            httpPost.addHeader(param.getKey(), String.valueOf(param.getValue()));
        }
        httpPost.setEntity(new StringEntity(strBody, UTF_8));return getResult(httpPost);
    }    
    private static ArrayList<namevaluepair> covertParams2NVPS(Map<string> params) {
        ArrayList<namevaluepair> pairs = new ArrayList<namevaluepair>();
        for (Map.Entry<string> param : params.entrySet()) {
            pairs.add(new BasicNameValuePair(param.getKey(), String.valueOf(param.getValue())));
        }return pairs;
    }/** * 处理Http请求
     * 
     *  setConnectTimeout：设置连接超时时间，单位毫秒。
     *  setConnectionRequestTimeout：设置从connect Manager获取Connection 超时时间，单位毫秒。这个属性是新加的属性，因为目前版本是可以共享连接池的。
     *  setSocketTimeout：请求获取数据的超时时间，单位毫秒。 如果访问一个接口，多少时间内无法返回数据，就直接放弃此次调用。
     *  
     * @param request
     * @return */private static String getResult(HttpRequestBase request) {
        
        RequestConfig requestConfig = RequestConfig.custom().setConnectTimeout(60000)
                .setConnectionRequestTimeout(5000).setSocketTimeout(60000).build();
        request.setConfig(requestConfig);// 设置请求和传输超时时间
        // CloseableHttpClient httpClient = HttpClients.createDefault();
        CloseableHttpClient httpClient = getHttpClient();
        try {
            CloseableHttpResponse response = httpClient.execute(request); //执行请求
            // response.getStatusLine().getStatusCode();
            HttpEntity entity = response.getEntity();
            if (entity != null) {
            // long len = entity.getContentLength();// -1 表示长度未知
            String result = EntityUtils.toString(entity);
                response.close();
                // httpClient.close();
                return result;
            }
        } catch (ClientProtocolException e) {
            logger.error("[maperror] HttpClientUtil ClientProtocolException : " + e.getMessage());
            throw new MapException(CodeConstant.CODE_CONNECT_FAIL, "HttpClientUtil ClientProtocolException ：" + e.getMessage());
        } catch (IOException e) {
            logger.error("[maperror] HttpClientUtil IOException : " + e.getMessage());
            throw new MapException(CodeConstant.CODE_CONNECT_FAIL, "HttpClientUtil IOException ：" + e.getMessage());
        } 
        finally {

        }
        return EMPTY_STR;
    }

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