HttpURLConnection

package com.test;

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.regex.Pattern;

/**
 * Http操做輔助工具
 * 
 */
public class HttpTool {
    /**
     * GET請求數據
     * 
     * @param get_url url地址
     * @param content key=value形式
     * @return 返回結果
     * @throws Exception
     */
    public String sendGetData(String get_url, String content) throws Exception {
        String result = "";
        URL getUrl = null;
        BufferedReader reader = null;
        String lines = "";
        HttpURLConnection connection = null;
        try {
            if (content != null && !content.equals(""))
                get_url = get_url + "?" + content;
            // get_url = get_url + "?" + URLEncoder.encode(content, "utf-8");
            getUrl = new URL(get_url);
            connection = (HttpURLConnection) getUrl.openConnection();
            connection.connect();
            // 取得輸入流，並使用Reader讀取
            reader = new BufferedReader(new InputStreamReader(
                    connection.getInputStream(), "utf-8"));// 設置編碼
            while ((lines = reader.readLine()) != null) {
                result = result + lines;
            }
            return result;
        } catch (Exception e) {
            throw e;
        } finally {
            if (reader != null) {
                reader.close();
                reader = null;
            }
            connection.disconnect();
        }
    }

    /**
     * @param POST_URL url地址
     * @param content key=value形式
     * @return 返回結果
     * @throws Exception
     */
    public String sendPostData(String POST_URL, String content) throws Exception {
        HttpURLConnection connection = null;
        DataOutputStream out = null;
        BufferedReader reader = null;
        String line = "";
        String result = "";
        try {
            URL postUrl = new URL(POST_URL);
            connection = (HttpURLConnection) postUrl.openConnection();
            connection.setDoOutput(true);
            connection.setDoInput(true);
            connection.setRequestMethod("POST");
            // Post 請求不能使用緩存
            connection.setUseCaches(false);
            connection.setInstanceFollowRedirects(true);
            connection.setRequestProperty("Content-Type",
                    "application/x-www-form-urlencoded");
            connection.connect();

            out = new DataOutputStream(connection.getOutputStream());
            // content = URLEncoder.encode(content, "utf-8");
            // DataOutputStream.writeBytes將字符串中的16位的unicode字符�?8位的字符形式寫道流裏�?
            out.writeBytes(content);
            out.flush();
            out.close();
            // 獲取結果
            reader = new BufferedReader(new InputStreamReader(
                    connection.getInputStream(), "utf-8"));// 設置編碼
            while ((line = reader.readLine()) != null) {
                result = result + line;
            }
            return result;
        } catch (Exception e) {
            throw e;
        } finally {
            if (out != null) {
                out.close();
                out = null;
            }
            if (reader != null) {
                reader.close();
                reader = null;
            }
            connection.disconnect();
        }
    }

    /*
     * 過濾掉html裏不安全的標籤，不容許用戶輸入這些標籤?
     */
    public static String htmlFilter(String inputString) {
        // return inputString;
        String htmlStr = inputString; // 含html標籤的字符串
        String textStr = "";
        java.util.regex.Pattern p_script;
        java.util.regex.Matcher m_script;

        try {
            String regEx_script = "<[\\s]*?(script|style)[^>]*?>[\\s\\S]*?<[\\s]*?\\/[\\s]*?(script|style)[\\s]*?>";
            String regEx_onevent = "on[^\\s]+=\\s*";
            String regEx_hrefjs = "href=javascript:";
            String regEx_iframe = "<[\\s]*?(iframe|frameset)[^>]*?>[\\s\\S]*?<[\\s]*?\\/[\\s]*?(iframe|frameset)[\\s]*?>";
            String regEx_link = "<[\\s]*?link[^>]*?/>";

            htmlStr = Pattern.compile(regEx_script, Pattern.CASE_INSENSITIVE)
                    .matcher(htmlStr).replaceAll("");
            htmlStr = Pattern.compile(regEx_onevent, Pattern.CASE_INSENSITIVE)
                    .matcher(htmlStr).replaceAll("");
            htmlStr = Pattern.compile(regEx_hrefjs, Pattern.CASE_INSENSITIVE)
                    .matcher(htmlStr).replaceAll("");
            htmlStr = Pattern.compile(regEx_iframe, Pattern.CASE_INSENSITIVE)
                    .matcher(htmlStr).replaceAll("");
            htmlStr = Pattern.compile(regEx_link, Pattern.CASE_INSENSITIVE)
                    .matcher(htmlStr).replaceAll("");

            // p_html = Pattern.compile(regEx_html, Pattern.CASE_INSENSITIVE);
            // m_html = p_html.matcher(htmlStr);
            // htmlStr = m_html.replaceAll(""); // 過濾html標籤

            textStr = htmlStr;

        } catch (Exception e) {
            System.err.println("Html2Text: " + e.getMessage());
        }

        return textStr;
    }

    public static void main(String args[]) {
        HttpTool t = new HttpTool();
        try {
            String ret = t.sendGetData("http://pinyin.sogou.com/dict/", "");
            System.out.println(ret);
            String ret_filter = htmlFilter(ret);
            System.out.println(ret_filter);
            String ret1 = t.sendPostData("http://pinyin.sogou.com/dict/", "");
            System.out.println(ret1);
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

}