Java网络请求工具类，java请求工具类,Java网络请求工具类(

Java网络请求工具类，java请求工具类,Java网络请求工具类(

Java网络请求工具类(依赖：org.apache.http;注：HttpClient 4.4,HttpCore 4.4)到此处可以去下载依赖包：http://hc.apache.org/downloads.cgi

import java.util.List;import org.apache.http.HttpStatus;import org.apache.http.NameValuePair;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.impl.client.CloseableHttpClient;import org.apache.http.impl.client.HttpClients;import org.apache.http.util.EntityUtils;/** * HttpServletUtil * * @author ysj * @Date: 2015-1-30 下午2:07:55 */public class HttpServletUtil {    private static CloseableHttpClient httpclient;    private static RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(5000).setConnectTimeout(5000).build();    /**     * Post:访问数据库并返回数据字符串     *     * @param params     *            向服务器端传的参数     * @param url     * @return String 数据字符串     * @throws Exception     */    public static String doPost(List<NameValuePair> params, String url) throws Exception {        String result = null;        httpclient = HttpClients.createDefault();        HttpPost httpPost = new HttpPost(url);        httpPost.setEntity(new UrlEncodedFormEntity(params));        //设置请求和传输超时时间        httpPost.setConfig(requestConfig);        CloseableHttpResponse httpResp = httpclient.execute(httpPost);        try {            int statusCode = httpResp.getStatusLine().getStatusCode();            // 判断是够请求成功            if (statusCode == HttpStatus.SC_OK) {                System.out.println("状态码:" + statusCode);                System.out.println("请求成功!");                // 获取返回的数据                result = EntityUtils.toString(httpResp.getEntity(), "UTF-8");            } else {                System.out.println("状态码:"                        + httpResp.getStatusLine().getStatusCode());                System.out.println("HttpPost方式请求失败!");            }        } finally {            httpResp.close();            httpclient.close();        }        return result;    }    /**     * Get:访问数据库并返回数据字符串     *     * @param url     * @return String 数据字符串     * @throws Exception     */     public static String doGet(String url) throws Exception{        String result = null;        httpclient = HttpClients.createDefault();        HttpGet httpGet = new HttpGet(url);        //设置请求和传输超时时间        httpGet.setConfig(requestConfig);        CloseableHttpResponse httpResp = httpclient.execute(httpGet);        try {            int statusCode = httpResp.getStatusLine().getStatusCode();            // 判断是够请求成功            if (statusCode == HttpStatus.SC_OK) {                System.out.println("状态码:" + statusCode);                System.out.println("请求成功!");                // 获取返回的数据                result = EntityUtils.toString(httpResp.getEntity(), "UTF-8");            } else {                System.out.println("状态码:"                        + httpResp.getStatusLine().getStatusCode());                System.out.println("HttpGet方式请求失败!");            }        } finally {            httpResp.close();            httpclient.close();        }        return result;     }}