HTTP请求代理类,后台post提交数据

星期四, 2008-09-25 | Author: liyz | JAVA-and-J2EE | 10,599 views

经测试,可以完成正常读取和提交,要想读取并解析其中内容还要借助html解析了,感觉像是做内容采集了,代码如下,仅是个代理类

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/**
 * Title:         HttpRequestProxy.java
 * Type:        com.liyz.http.HttpRequestProxy
 * Company:
 */
package com.liyz.http;
 
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;
 
import org.apache.log4j.Logger;
 
/**
 * HTTP请求代理类
 */
public class HttpRequestProxy
{
    /**
     * 连接超时
     */
    private static int connectTimeOut = 5000;
 
    /**
     * 读取数据超时
     */
    private static int readTimeOut = 10000;
 
    /**
     * 请求编码
     */
    private static String requestEncoding = "utf-8";
 
    private static Logger logger = Logger.getLogger(HttpRequestProxy.class);
 
    /**
     * 发送带参数的GET的HTTP请求
     *
     * @param reqUrl HTTP请求URL
     * @param parameters 参数映射表
     * @return HTTP响应的字符串
     */
    @SuppressWarnings("unchecked")
	public static String doGet(String reqUrl, Map parameters,
            String recvEncoding)
    {
        HttpURLConnection url_con = null;
        String responseContent = null;
        try
        {
            StringBuffer params = new StringBuffer();
            for (Iterator iter = parameters.entrySet().iterator(); iter
                    .hasNext();)
            {
                Entry element = (Entry) iter.next();
                params.append(element.getKey().toString());
                params.append("=");
                params.append(URLEncoder.encode(element.getValue().toString(),
                        HttpRequestProxy.requestEncoding));
                params.append("&");
            }
 
            if (params.length() > 0)
            {
                params = params.deleteCharAt(params.length() - 1);
            }
 
            URL url = new URL(reqUrl);
            url_con = (HttpURLConnection) url.openConnection();
            url_con.setRequestMethod("GET");
            System.setProperty("sun.net.client.defaultConnectTimeout", String
                    .valueOf(HttpRequestProxy.connectTimeOut));// (单位:毫秒)jdk1.4换成这个,连接超时
            System.setProperty("sun.net.client.defaultReadTimeout", String
                    .valueOf(HttpRequestProxy.readTimeOut)); // (单位:毫秒)jdk1.4换成这个,读操作超时
            // url_con.setConnectTimeout(5000);//(单位:毫秒)jdk
            // 1.5换成这个,连接超时
            // url_con.setReadTimeout(5000);//(单位:毫秒)jdk 1.5换成这个,读操作超时
            url_con.setDoOutput(true);
            byte[] b = params.toString().getBytes();
            url_con.getOutputStream().write(b, 0, b.length);
            url_con.getOutputStream().flush();
            url_con.getOutputStream().close();
 
            InputStream in = url_con.getInputStream();
            BufferedReader rd = new BufferedReader(new InputStreamReader(in,
                    recvEncoding));
            String tempLine = rd.readLine();
            StringBuffer temp = new StringBuffer();
            String crlf=System.getProperty("line.separator");
            while (tempLine != null)
            {
                temp.append(tempLine);
                temp.append(crlf);
                tempLine = rd.readLine();
            }
            responseContent = temp.toString();
            rd.close();
            in.close();
        }
        catch (IOException e)
        {
            logger.error("网络故障", e);
        }
        finally
        {
            if (url_con != null)
            {
                url_con.disconnect();
            }
        }
 
        return responseContent;
    }
 
    /**
     * 发送不带参数的GET的HTTP请求
     *
     * @param reqUrl HTTP请求URL
     * @return HTTP响应的字符串
     */
    public static String doGet(String reqUrl, String recvEncoding)
    {
        HttpURLConnection url_con = null;
        String responseContent = null;
        try
        {
            StringBuffer params = new StringBuffer();
            String queryUrl = reqUrl;
            int paramIndex = reqUrl.indexOf("?");
 
            if (paramIndex > 0)
            {
                queryUrl = reqUrl.substring(0, paramIndex);
                String parameters = reqUrl.substring(paramIndex + 1, reqUrl
                        .length());
                String[] paramArray = parameters.split("&");
                for (int i = 0; i < paramArray.length; i++)
                {
                    String string = paramArray[i];
                    int index = string.indexOf("=");
                    if (index > 0)
                    {
                        String parameter = string.substring(0, index);
                        String value = string.substring(index + 1, string
                                .length());
                        params.append(parameter);
                        params.append("=");
                        params.append(URLEncoder.encode(value,
                                HttpRequestProxy.requestEncoding));
                        params.append("&#038;");
                    }
                }
 
                params = params.deleteCharAt(params.length() - 1);
            }
 
            URL url = new URL(queryUrl);
            url_con = (HttpURLConnection) url.openConnection();
            url_con.setRequestMethod("GET");
            System.setProperty("sun.net.client.defaultConnectTimeout", String
                    .valueOf(HttpRequestProxy.connectTimeOut));// (单位:毫秒)jdk1.4换成这个,连接超时
            System.setProperty("sun.net.client.defaultReadTimeout", String
                    .valueOf(HttpRequestProxy.readTimeOut)); // (单位:毫秒)jdk1.4换成这个,读操作超时
            // url_con.setConnectTimeout(5000);//(单位:毫秒)jdk
            // 1.5换成这个,连接超时
            // url_con.setReadTimeout(5000);//(单位:毫秒)jdk 1.5换成这个,读操作超时
            url_con.setDoOutput(true);
            byte[] b = params.toString().getBytes();
            url_con.getOutputStream().write(b, 0, b.length);
            url_con.getOutputStream().flush();
            url_con.getOutputStream().close();
            InputStream in = url_con.getInputStream();
            BufferedReader rd = new BufferedReader(new InputStreamReader(in,
                    recvEncoding));
            String tempLine = rd.readLine();
            StringBuffer temp = new StringBuffer();
            String crlf=System.getProperty("line.separator");
            while (tempLine != null)
            {
                temp.append(tempLine);
                temp.append(crlf);
                tempLine = rd.readLine();
            }
            responseContent = temp.toString();
            rd.close();
            in.close();
        }
        catch (IOException e)
        {
            logger.error("网络故障", e);
        }
        finally
        {
            if (url_con != null)
            {
                url_con.disconnect();
            }
        }
 
        return responseContent;
    }
 
    /**
     * 发送带参数的POST的HTTP请求
     *
     * @param reqUrl HTTP请求URL
     * @param parameters 参数映射表
     * @return HTTP响应的字符串
     */
    @SuppressWarnings("unchecked")
	public static String doPost(String reqUrl, Map parameters,
            String recvEncoding)
    {
        HttpURLConnection url_con = null;
        String responseContent = null;
        try
        {
            StringBuffer params = new StringBuffer();
            for (Iterator iter = parameters.entrySet().iterator(); iter
                    .hasNext();)
            {
                Entry element = (Entry) iter.next();
                params.append(element.getKey().toString());
                params.append("=");
                params.append(URLEncoder.encode(element.getValue().toString(),
                        HttpRequestProxy.requestEncoding));
                params.append("&#038;");
            }
 
            if (params.length() > 0)
            {
                params = params.deleteCharAt(params.length() - 1);
            }
 
            URL url = new URL(reqUrl);
            url_con = (HttpURLConnection) url.openConnection();
            url_con.setRequestMethod("POST");
            System.setProperty("sun.net.client.defaultConnectTimeout", String
                    .valueOf(HttpRequestProxy.connectTimeOut));// (单位:毫秒)jdk1.4换成这个,连接超时
            System.setProperty("sun.net.client.defaultReadTimeout", String
                    .valueOf(HttpRequestProxy.readTimeOut)); // (单位:毫秒)jdk1.4换成这个,读操作超时
            // url_con.setConnectTimeout(5000);//(单位:毫秒)jdk
            // 1.5换成这个,连接超时
            // url_con.setReadTimeout(5000);//(单位:毫秒)jdk 1.5换成这个,读操作超时
            url_con.setDoOutput(true);
            byte[] b = params.toString().getBytes();
            url_con.getOutputStream().write(b, 0, b.length);
            url_con.getOutputStream().flush();
            url_con.getOutputStream().close();
 
            InputStream in = url_con.getInputStream();
            BufferedReader rd = new BufferedReader(new InputStreamReader(in,
                    recvEncoding));
            String tempLine = rd.readLine();
            StringBuffer tempStr = new StringBuffer();
            String crlf=System.getProperty("line.separator");
            while (tempLine != null)
            {
                tempStr.append(tempLine);
                tempStr.append(crlf);
                tempLine = rd.readLine();
            }
            responseContent = tempStr.toString();
            rd.close();
            in.close();
        }
        catch (IOException e)
        {
            logger.error("网络故障", e);
        }
        finally
        {
            if (url_con != null)
            {
                url_con.disconnect();
            }
        }
        return responseContent;
    }
 
    /**
     * @return 连接超时(毫秒)
     * @see com.liyz.http.HttpRequestProxy#connectTimeOut
     */
    public static int getConnectTimeOut()
    {
        return HttpRequestProxy.connectTimeOut;
    }
 
    /**
     * @return 读取数据超时(毫秒)
     * @see com.liyz.http.HttpRequestProxy#readTimeOut
     */
    public static int getReadTimeOut()
    {
        return HttpRequestProxy.readTimeOut;
    }
 
    /**
     * @return 请求编码
     * @see com.liyz.http.HttpRequestProxy#requestEncoding
     */
    public static String getRequestEncoding()
    {
        return requestEncoding;
    }
 
    /**
     * @param connectTimeOut 连接超时(毫秒)
     * @see com.liyz.http.HttpRequestProxy#connectTimeOut
     */
    public static void setConnectTimeOut(int connectTimeOut)
    {
        HttpRequestProxy.connectTimeOut = connectTimeOut;
    }
 
    /**
     * @param readTimeOut 读取数据超时(毫秒)
     * @see com.liyz.http.HttpRequestProxy#readTimeOut
     */
    public static void setReadTimeOut(int readTimeOut)
    {
        HttpRequestProxy.readTimeOut = readTimeOut;
    }
 
    /**
     * @param requestEncoding 请求编码
     * @see com.liyz.http.HttpRequestProxy#requestEncoding
     */
    public static void setRequestEncoding(String requestEncoding)
    {
        HttpRequestProxy.requestEncoding = requestEncoding;
    }
 
    /**
	 * @param args
	 *            http://localhost/bbs/register2.php?username=test002&#038;password=123456
	 *            &#038;email=magzone@magzone.com&#038;locationnew=香港
     * @throws UnsupportedEncodingException
	 * @throws IOException
	 */
    public static void main(String[] args)
    {
        Map<String, String> map = new HashMap<String, String>();
        map.put("username", "testing008");
        map.put("password", "123456");
        map.put("email", "magzone@magzone.com");
 
        map.put("locationnew", "香港");
 
        String temp = HttpRequestProxy.doPost("http://192.168.101.118/bbs/register2.php", map, "utf-8");
        System.out.println("返回的消息是:"+temp);
 
    }
}

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文章作者: liyz

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