Java處理HTTP請(qǐng)求的相關(guān)代碼
2018-07-20 來(lái)源：open-open
可以用于處理HTTP GET請(qǐng)求，POST請(qǐng)求，過(guò)濾HTML代碼等
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操作輔助工具
*
* Get和Post兩者在傳遞參數(shù)方式上有差異
*
* 1、Get: 把參數(shù)附加到url上，比如URL="http://www.abc.com?name=123&age=18"
* 2、Post：請(qǐng)求的url不變，但在content中加入?yún)?shù)，如 content="name=123&age=18",然后把content加入到post中
*
*/
public class HttpTool {
/**
* GET請(qǐng)求數(shù)據(jù)
* @param get_url url地址
* @param content key=value形式
* @return 返回結(jié)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，并使用Reader讀取
reader = new BufferedReader(new InputStreamReader(connection
.getInputStream(), "utf-8"));// 設(shè)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(jié)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);//Let the run-time system (RTS) know that we want input
connection.setDoInput(true);//we want to do output.
connection.setRequestMethod("POST");
connection.setUseCaches(false);// Post 請(qǐng)求不能使用緩存
connection.setInstanceFollowRedirects(true);
connection.setRequestProperty("Content-Type",//Specify the header content type.
"application/x-www-form-urlencoded");
connection.connect();
out = new DataOutputStream(connection.getOutputStream()); // Send POST output.
// DataOutputStream.writeBytes將字符串中的16位的unicode字符變?yōu)閡tf-8的字符形式寫道流里
//content = URLEncoder.encode(content, "utf-8");
out.writeBytes(content);
/**
* 如果url中帶有多個(gè)key-value參數(shù)對(duì)，則采用下面的方式寫到content中
* 正文內(nèi)容其實(shí)跟get的URL中'?'后的參數(shù)字符串一致
*
String content =
"name=" + URLEncoder.encode ("Hitesh Agrawal") +
"&profession=" + URLEncoder.encode ("Software Engineer");
out.flush();
out.close(); */
//獲取結(jié)果
reader = new BufferedReader(new InputStreamReader(
connection.getInputStream(), "utf-8"));// 設(shè)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(guò)濾掉html里不安全的標(biāo)簽，不允許用戶輸入這些符號(hào)
*/
public static String htmlFilter(String inputString) {
//return inputString;
String htmlStr = inputString; // 含html標(biāo)簽的字符串
String textStr = "";
java.util.regex.Pattern p_script;
java.util.regex.Matcher m_script;
try {
String regEx_script = "<[s]*?(script|style)[^>]*?>[sS]*?<[s]*?/[s]*?(script|style)[s]*?>";
String regEx_onevent="on[^s]+=s*";
String regEx_hrefjs="href=javascript:";
String regEx_iframe="<[s]*?(iframe|frameset)[^>]*?>[sS]*?<[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(guò)濾html標(biāo)簽
textStr = htmlStr;
} catch (Exception e) {
System.err.println("Html2Text: " + e.getMessage());
}
return textStr;
}
public static void main(String[] args){
HttpTool ht = new HttpTool();
try {
ht.sendGetData("http://www.baidu.com", "");
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
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