java发送GET/POST请求工具类 (一)

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.nio.charset.Charset;
import java.util.Map;
import java.util.Vector;

/**
 * Java HTTP请求对象 发送GET/POST请求工具类
 */
public class HttpRequester {

	private String defaultContentEncoding;

	public HttpRequester() {
		this.defaultContentEncoding = Charset.defaultCharset().name();
	}

	/**
	 * 发送GET请求
	 * 
	 * @param urlString  URL地址
	 * @return 响应对象
	 * @throws IOException
	 */
	public HttpRespons sendGet(String urlString) throws IOException {
		return this.send(urlString, "GET", null, null);
	}

	/**
	 * 发送GET请求
	 * 
	 * @param urlString  URL地址
	 * @param params 参数集合
	 * @return 响应对象
	 * @throws IOException
	 */
	public HttpRespons sendGet(String urlString, Map params) throws IOException {
		return this.send(urlString, "GET", params, null);
	}

	/**
	 * 发送GET请求
	 * 
	 * @param urlString URL地址
	 * @param params 参数集合
	 * @param propertys 请求属性
	 * @return 响应对象
	 * @throws IOException
	 */
	public HttpRespons sendGet(String urlString, Map params, Map propertys)
			throws IOException {
		return this.send(urlString, "GET", params, propertys);
	}

	/**
	 * 发送POST请求
	 * 
	 * @param urlString URL地址
	 * @return 响应对象
	 * @throws IOException
	 */
	public HttpRespons sendPost(String urlString) throws IOException {
		return this.send(urlString, "POST", null, null);
	}

	/**
	 * 发送POST请求
	 * 
	 * @param urlString URL地址
	 * @param params 参数集合
	 * @return 响应对象
	 * @throws IOException
	 */
	public HttpRespons sendPost(String urlString, Map





 params) throws IOException {
		return this.send(urlString, "POST", params, null);
	}

	/**
	 * 发送POST请求
	 * 
	 * @param urlString URL地址
	 * @param params 参数集合
	 * @param propertys 请求属性
	 * @return 响应对象
	 * @throws IOException
	 */
	public HttpRespons sendPost(String urlString, Map params, Map propertys)
			throws IOException {
		return this.send(urlString, "POST", params, propertys);
	}

	/**
	 * 发送HTTP请求
	 * 
	 * @param urlString 地址
	 * @param method  get/post
	 * @param parameters  添加由键值对指定的请求参数
	 * @param propertys  添加由键值对指定的一般请求属性
	 * @return 响映对象
	 * @throws IOException
	 */
	private HttpRespons send(String urlString, String method, Map parameters,
			Map propertys) throws IOException {
		HttpURLConnection urlConnection = null;

		if (method.equalsIgnoreCase("GET") && parameters != null) {
			StringBuffer param = new StringBuffer();
			int i = 0;
			for (String key : parameters.keySet()) {
				if (i == 0)
					param.append(" ");
				else
					param.append("&");
				param.append(key).append("=").append(parameters.get(key));
				i++;
			}
			urlString += param;
		}

		URL url = new URL(urlString);
		urlConnection = (HttpURLConnection) url.openConnection();
		urlConnection.setRequestMethod(method);
		urlConnection.setDoOutput(true);
		urlConnection.setDoInput(true);
		urlConnection.setUseCaches(false);

		if (propertys != null)
			for (String key : propertys.keySet()) {
				urlConnection.addRequestProperty(key, propertys.get(key));
			}

		if (method.equalsIgnoreCase("POST") && parameters != null) {
			St