Http请求1

package Test;

import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import org.apache.http.NameValuePair;
import org.apache.http.HttpEntity;
import org.apache.http.client.ClientProtocolException;
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.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.message.BasicNameValuePair;
import org.apache.http.util.CharArrayBuffer;
import org.apache.http.util.EntityUtils;

public class HttpClient {
    /**
     * 包含字符串参数的HttpPost请求
     */
    public static String doPostStr(String url, String string) throws IOException {
        String resp = null;
        StringEntity entityStr = new StringEntity(string,ContentType.create("text/plain", "UTF-8"));
        CloseableHttpClient httpClient = HttpClients.createDefault();
        HttpPost httpPost = new HttpPost(url);
        httpPost.setEntity(entityStr);
        CloseableHttpResponse response = null;
        try {
            response = httpClient.execute(httpPost);
            HttpEntity entity = response.getEntity();
            resp = EntityUtils.toString(entity, "UTF-8");
            EntityUtils.consume(entity);
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (response != null) {
                try {
                    response.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return resp;
    }
    /**
     * 不含参数的HttpPost请求
     */
    public static String doPost(String url) throws IOException {
        CloseableHttpClient httpclient = HttpClients.createDefault();
        HttpPost httppost = new HttpPost(url);
        CloseableHttpResponse response = null;
        try {
            response = httpclient.execute(httppost);
        } catch (IOException e) {
            e.printStackTrace();
        }
        HttpEntity entity = response.getEntity();
        String result = null;
        result = EntityUtils.toString(entity);
        return result;
    }
    /**
     * 包含Map参数的HttpGet请求
     */
    public static String doGetMap(String url, Map<String,String> map) throws IOException {
        String result = null;
        CloseableHttpClient httpClient = HttpClients.createDefault();
        List<NameValuePair> pairs = new ArrayList<NameValuePair>();
        for(Map.Entry<String,String> entry : map.entrySet()){
            pairs.add(new BasicNameValuePair(entry.getKey(),entry.getValue()));
        }
        CloseableHttpResponse response = null;
        try {
            URIBuilder builder = new URIBuilder(url);
            builder.setParameters(pairs);
            HttpGet get = new HttpGet(builder.build());
            response = httpClient.execute(get);
            if(response != null && response.getStatusLine().getStatusCode() == 200){
                HttpEntity entity = response.getEntity();
                long lenth = entity.getContentLength();
                if(lenth != -1 && lenth < 2048){
                    result = EntityUtils.toString(entity,"UTF-8");
                }else {
                    InputStreamReader reader1 = new InputStreamReader(entity.getContent(), "UTF-8");
                    CharArrayBuffer buffer = new CharArrayBuffer(2048);
                    char[] tmp = new char[1024];
                    int l;
                    while((l = reader1.read(tmp)) != -1) {
                        buffer.append(tmp, 0, l);
                    }
                    result = buffer.toString();
                }
            }
        } catch (URISyntaxException e) {
            e.printStackTrace();
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            try {
                httpClient.close();
                if(response != null)
                {
                    response.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return result;
    }
    /**
     * 发送不带参数的HttpGet请求
     */
    public static String sendGet(String url) throws IOException {
        CloseableHttpClient httpclient = HttpClients.createDefault();
        HttpGet httpget = new HttpGet(url);
        CloseableHttpResponse response = null;
        try {
            response = httpclient.execute(httpget);
        } catch (IOException e) {
            e.printStackTrace();
        }
        HttpEntity entity = response.getEntity();
        String result = null;
        result = EntityUtils.toString(entity);
        return result;
    }
}