Java发送HTTP

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;

/**
 * HTTP请求对象
 * 
 * @author 尹浩
 */
public class HttpRequester {

	private String defaultContentEncoding;

	public HttpRequester() {

		this.defaultContentEncoding = Charset.defaultCharset().name();
	}

	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<String, String> 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<String, String> params,
			Map<String, String>

			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<String, String> 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<String, String> params,
			Map<String, String>

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

	/**
	 * 　　 * 发送HTTP请求 　　 * 　　 * @param urlString 　　 * @return 响映对象 　　 * @throws
	 * IOException 　　
	 */
	private HttpRespons send(String urlString, String method,
			Map<String, String> parameters,

			Map<String, String> propertys) throws IOException {
		// HttpURLConnection为局部变量
		HttpURLConnection urlConnection = null;
		// URL对象
		URL url = null;

		// 如果请求为GET方法，并且参数不为空
		if (method.equalsIgnoreCase("GET") && parameters != null) {
			// 构建并拼接参数字符串
			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++;
			}
			// 拼接URL串 + 参数
			urlString += param;
		}
		// NEW一个URL对象，由该对象的openConnection()方法将生成一个URLConnection对象
		url = new URL(urlString);
		urlConnection = (HttpURLConnection) url.openConnection();

		// 设置相关属性，具体含义请查阅JDK文档
		urlConnection.setRequestMethod(method);
		urlConnection.setDoOutput(true);
		urlConnection.setDoInput(true);
		urlConnection.setUseCaches(false);

		// 赋予请求属性
		if (propertys != null)
			for (String key : propertys.keySet()) {
				urlConnection.addRequestProperty(key, propertys.get(key));
			}

		// 如果请求为POST方法，并且参数不为空
		if (method.equalsIgnoreCase("POST") && parameters != null) {
			StringBuffer param = new StringBuffer();
			for (String key : parameters.keySet()) {
				param.append("&");
				param.append(key).append("=").append(parameters.get(key));
			}
			// 将参数信息发送到HTTP服务器
			// 要注意：一旦使用了urlConnection.getOutputStream().write()方法，

			urlConnection.setRequestMethod("GET");
			urlConnection.getOutputStream().write(param.toString().getBytes());
			urlConnection.getOutputStream().flush();
			urlConnection.getOutputStream().close();
		}

		return this.makeContent(urlString, urlConnection);
	}

	/**
	 * 　　 * 得到响应对象 　　 * 　　 * @param urlConnection 　　 * @return 响应对象 　　 * @throws
	 * IOException 　　
	 */
	private HttpRespons makeContent(String urlString,
			HttpURLConnection urlConnection) throws IOException

	{
		HttpRespons httpResponser = new HttpRespons();
		try {
			// 得到响应流
			InputStream in = urlConnection.getInputStream();
			// 封装成高级对象
			BufferedReader bufferedReader = new BufferedReader(
					new InputStreamReader(in));
			// 内容集合(集合项为行内容)
			httpResponser.contentCollection = new Vector<String>();
			StringBuffer temp = new StringBuffer();
			String line = bufferedReader.readLine();
			while (line != null) {
				httpResponser.contentCollection.add(line);
				temp.append(line).append("\r\n");
				line = bufferedReader.readLine();
			}
			bufferedReader.close();

			// 得到请求连接的字符集
			String ecod = urlConnection.getContentEncoding();
			if (ecod == null)
				ecod = this.defaultContentEncoding;

			// 将各属性赋值给响应对象
			httpResponser.urlString = urlString;
			httpResponser.defaultPort = urlConnection.getURL().getDefaultPort();
			httpResponser.file = urlConnection.getURL().getFile();
			httpResponser.host = urlConnection.getURL().getHost();
			httpResponser.path = urlConnection.getURL().getPath();
			httpResponser.port = urlConnection.getURL().getPort();
			httpResponser.protocol = urlConnection.getURL().getProtocol();
			httpResponser.query = urlConnection.getURL().getQuery();
			httpResponser.ref = urlConnection.getURL().getRef();
			httpResponser.userInfo = urlConnection.getURL().getUserInfo();
			httpResponser.content = new String(temp.toString().getBytes(), ecod);
			httpResponser.contentEncoding = ecod;
			httpResponser.code = urlConnection.getResponseCode();
			httpResponser.message = urlConnection.getResponseMessage();
			httpResponser.contentType = urlConnection.getContentType();
			httpResponser.method = urlConnection.getRequestMethod();
			httpResponser.connectTimeout = urlConnection.getConnectTimeout();
			httpResponser.readTimeout = urlConnection.getReadTimeout();

			return httpResponser;
		} catch (IOException e) {
			throw e;
		} finally {
			// 最终关闭流
			if (urlConnection != null)
				urlConnection.disconnect();
		}
	}

	/**
	 * 默认的响应字符集
	 */
	public String getDefaultContentEncoding() {
		return this.defaultContentEncoding;
	}

	/**
	 * 设置默认的响应字符集
	 */
	public void setDefaultContentEncoding(String defaultContentEncoding) {
		this.defaultContentEncoding = defaultContentEncoding;
	}
}

import java.util.Vector;
/**
 * 
 * @author 尹浩
 *
 */
public class HttpRespons {

	String urlString;// URL地址串

	int defaultPort;

	String file;

	String host;

	String path;

	int port;

	String protocol;

	String query;

	String ref;

	String userInfo;

	String contentEncoding;

	String content;// 内容

	String contentType;

	int code;

	String message;

	String method;// 方法

	int connectTimeout;

	int readTimeout;

	Vector<String> contentCollection;// 内容，集合中保存行

	public String getContent() {
		return content;
	}

	public String getContentType() {
		return contentType;
	}

	public int getCode() {
		return code;
	}

	public String getMessage() {
		return message;
	}

	public Vector<String> getContentCollection() {
		return contentCollection;
	}

	public String getContentEncoding() {
		return contentEncoding;
	}

	public String getMethod() {
		return method;
	}

	public int getConnectTimeout() {
		return connectTimeout;
	}

	public int getReadTimeout() {
		return readTimeout;
	}

	public String getUrlString() {
		return urlString;
	}

	public int getDefaultPort() {
		return defaultPort;
	}

	public String getFile() {
		return file;
	}

	public String getHost() {
		return host;
	}

	public String getPath() {
		return path;
	}

	public int getPort() {
		return port;
	}

	public String getProtocol() {
		return protocol;
	}

	public String getQuery() {
		return query;
	}

	public String getRef() {
		return ref;
	}

	public String getUserInfo() {
		return userInfo;
	}

}

public class Test {
	public static void main(String[] ars) {
		HttpRequester request = new HttpRequester();
		HttpRespons hr = null;
		String urlStr = "http://hi.baidu.com/yymmiinngg";
		try {
			hr = request.sendGet(urlStr);
			System.out.println(hr.getContent());
		} catch (Exception e) {
			String e_str = "Send get to " + urlStr + " error : " + e.toString();
		}
	}
}

评论

1 楼 zhf1zhf2 2010-11-26  

帅哥加点讲解啊！