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本文實例講授了java完成http的Post、Get、署理拜訪要求的具體代碼片斷，分享給年夜家供年夜家參考，詳細內容以下
package com.snowfigure.kits.net;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.InetSocketAddress;
import java.net.Proxy;
import java.net.URL;
import java.net.URLConnection;
import java.util.List;
import java.util.Map;
/**
* Http要求對象類
* @author snowfigure
* @since 2014-8-24 13:30:56
* @version v1.0.1
*/
public class HttpRequestUtil {
static boolean proxySet = false;
static String proxyHost = "127.0.0.1";
static int proxyPort = 8087;
/**
* 編碼
* @param source
* @return
*/
public static String urlEncode(String source,String encode) {
String result = source;
try {
result = java.net.URLEncoder.encode(source,encode);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
return "0";
}
return result;
}
public static String urlEncodeGBK(String source) {
String result = source;
try {
result = java.net.URLEncoder.encode(source,"GBK");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
return "0";
}
return result;
}
/**
* 提議http要求獲得前往成果
* @param req_url 要求地址
* @return
*/
public static String httpRequest(String req_url) {
StringBuffer buffer = new StringBuffer();
try {
URL url = new URL(req_url);
HttpURLConnection httpUrlConn = (HttpURLConnection) url.openConnection();
httpUrlConn.setDoOutput(false);
httpUrlConn.setDoInput(true);
httpUrlConn.setUseCaches(false);
httpUrlConn.setRequestMethod("GET");
httpUrlConn.connect();
// 將前往的輸出流轉換成字符串
InputStream inputStream = httpUrlConn.getInputStream();
InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");
BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
String str = null;
while ((str = bufferedReader.readLine()) != null) {
buffer.append(str);
}
bufferedReader.close();
inputStreamReader.close();
// 釋放資本
inputStream.close();
inputStream = null;
httpUrlConn.disconnect();
} catch (Exception e) {
System.out.println(e.getStackTrace());
}
return buffer.toString();
}
/**
* 發送http要求獲得前往的輸出流
* @param requestUrl 要求地址
* @return InputStream
*/
public static InputStream httpRequestIO(String requestUrl) {
InputStream inputStream = null;
try {
URL url = new URL(requestUrl);
HttpURLConnection httpUrlConn = (HttpURLConnection) url.openConnection();
httpUrlConn.setDoInput(true);
httpUrlConn.setRequestMethod("GET");
httpUrlConn.connect();
// 取得前往的輸出流
inputStream = httpUrlConn.getInputStream();
} catch (Exception e) {
e.printStackTrace();
}
return inputStream;
}
/**
* 向指定URL發送GET辦法的要求
*
* @param url
* 發送要求的URL
* @param param
* 要求參數，要求參數應當是 name1=value1&name2=value2 的情勢。
* @return URL 所代表長途資本的呼應成果
*/
public static String sendGet(String url, String param) {
String result = "";
BufferedReader in = null;
try {
String urlNameString = url + "?" + param;
URL realUrl = new URL(urlNameString);
// 翻開和URL之間的銜接
URLConnection connection = realUrl.openConnection();
// 設置通用的要求屬性
connection.setRequestProperty("accept", "*/*");
connection.setRequestProperty("connection", "Keep-Alive");
connection.setRequestProperty("user-agent",
"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
// 樹立現實的銜接
connection.connect();
// 獲得一切呼應頭字段
Map<String, List<String>> map = connection.getHeaderFields();
// 遍歷一切的呼應頭字段
for (String key : map.keySet()) {
System.out.println(key + "--->" + map.get(key));
}
// 界說 BufferedReader輸出流來讀取URL的呼應
in = new BufferedReader(new InputStreamReader(
connection.getInputStream()));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
} catch (Exception e) {
System.out.println("發送GET要求湧現異常！" + e);
e.printStackTrace();
}
// 應用finally塊來封閉輸出流
finally {
try {
if (in != null) {
in.close();
}
} catch (Exception e2) {
e2.printStackTrace();
}
}
return result;
}
/**
* 向指定 URL 發送POST辦法的要求
*
* @param url
* 發送要求的 URL
* @param param
* 要求參數，要求參數應當是 name1=value1&name2=value2 的情勢。
* @param isproxy
* 能否應用署理形式
* @return 所代表長途資本的呼應成果
*/
public static String sendPost(String url, String param,boolean isproxy) {
OutputStreamWriter out = null;
BufferedReader in = null;
String result = "";
try {
URL realUrl = new URL(url);
HttpURLConnection conn = null;
if(isproxy){//應用署理形式
@SuppressWarnings("static-access")
Proxy proxy = new Proxy(Proxy.Type.DIRECT.HTTP, new InetSocketAddress(proxyHost, proxyPort));
conn = (HttpURLConnection) realUrl.openConnection(proxy);
}else{
conn = (HttpURLConnection) realUrl.openConnection();
}
// 翻開和URL之間的銜接
// 發送POST要求必需設置以下兩行
conn.setDoOutput(true);
conn.setDoInput(true);
conn.setRequestMethod("POST"); // POST辦法
// 設置通用的要求屬性
conn.setRequestProperty("accept", "*/*");
conn.setRequestProperty("connection", "Keep-Alive");
conn.setRequestProperty("user-agent",
"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
conn.connect();
// 獲得URLConnection對象對應的輸入流
out = new OutputStreamWriter(conn.getOutputStream(), "UTF-8");
// 發送要求參數
out.write(param);
// flush輸入流的緩沖
out.flush();
// 界說BufferedReader輸出流來讀取URL的呼應
in = new BufferedReader(
new InputStreamReader(conn.getInputStream()));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
} catch (Exception e) {
System.out.println("發送 POST 要求湧現異常！"+e);
e.printStackTrace();
}
//應用finally塊來封閉輸入流、輸出流
finally{
try{
if(out!=null){
out.close();
}
if(in!=null){
in.close();
}
}
catch(IOException ex){
ex.printStackTrace();
}
}
return result;
}
public static void main(String[] args) {
//demo:署理拜訪
String url = "http://api.adf.ly/api.php";
String para = "key=youkeyid&youuid=uid&advert_type=int&domain=adf.ly&url=http://somewebsite.com";
String sr=HttpRequestUtil.sendPost(url,para,true);
System.out.println(sr);
}
}
願望本文所述對年夜家進修java法式設計有所贊助。
