httpclient post请求实例（自己写的）

package com.gop.gplus.trade.common.utils;

import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpMethod;
import org.apache.commons.httpclient.NameValuePair;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.httpclient.methods.PostMethod;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

/**
 * Created by zhangtan on 2016/9/23.
 */
public class HttpClientUtil {
    public static String post(Map<String, Object> sParaTemp, String url) throws Exception{
        HttpClient httpClient = new HttpClient();

        PostMethod post = new PostMethod(url);
        post.setRequestHeader("Content-Type","application/x-www-form-urlencoded;charset=utf-8");

        List<String> keys = new ArrayList<String>(sParaTemp.keySet());
        NameValuePair[] param = new NameValuePair[keys.size()+1];
        for (int i = 0; i < keys.size(); i++) {
            String name = keys.get(i);
            Object object = sParaTemp.get(name);
            String value = "";
            if (object != null) {
                value = (String) sParaTemp.get(name);
            }
            //添加参数
            param[i] = new NameValuePair(name, value);
            post.setParameter(param[i].getName(),param[i].getValue());
            //System.out.println(param[i].getName());
        }
        HttpMethod method = post;
        httpClient.executeMethod(method);
        String response = method.getResponseBodyAsString();
        post.releaseConnection();
        return response;
    }
}