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操作辅助工具
*
*/
public class HttpTool {
/**
* GET请求数据
*
* @param get_url url地址
* @param content key=value形式
* @return 返回结果
* @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();
// 取得输入流，并使用Reader读取
reader = new BufferedReader(new InputStreamReader(
connection.getInputStream(), "utf-8"));// 设置编码
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 返回结果
* @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 请求不能使用缓存
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将字符串中的16位的unicode字符�?8位的字符形式写道流里�?
out.writeBytes(content);
out.flush();
out.close();
// 获取结果
reader = new BufferedReader(new InputStreamReader(
connection.getInputStream(), "utf-8"));// 设置编码
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();
}
}

/*
* 过滤掉html里不安全的标签，不允许用户输入这些标签?
*/
public static String htmlFilter(String inputString) {
// return inputString;
String htmlStr = inputString; // 含html标签的字符串
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(""); // 过滤html标签

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();
}
}

}