Java implements HTTP Post Get and proxy access requests
- 2020-04-01 04:36:56
- OfStack
This article illustrates the Java implementation of HTTP Post, Get, proxy access requests detailed code fragments, Shared for your reference, the specific content is as follows
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;
public class HttpRequestUtil {
static boolean proxySet = false;
static String proxyHost = "127.0.0.1";
static int proxyPort = 8087;
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;
}
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();
//Replace the returned input stream with a string
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();
//Release resources
inputStream.close();
inputStream = null;
httpUrlConn.disconnect();
} catch (Exception e) {
System.out.println(e.getStackTrace());
}
return buffer.toString();
}
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();
//Gets the returned input stream
inputStream = httpUrlConn.getInputStream();
} catch (Exception e) {
e.printStackTrace();
}
return inputStream;
}
public static String sendGet(String url, String param) {
String result = "";
BufferedReader in = null;
try {
String urlNameString = url + "?" + param;
URL realUrl = new URL(urlNameString);
//Open the connection between and URL
URLConnection connection = realUrl.openConnection();
//Sets the generic request properties
connection.setRequestProperty("accept", "*/*");
connection.setRequestProperty("connection", "Keep-Alive");
connection.setRequestProperty("user-agent",
"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
//Establish the actual connection
connection.connect();
//Gets all the response header fields
Map<String, List<String>> map = connection.getHeaderFields();
//Traverses all response header fields
for (String key : map.keySet()) {
System.out.println(key + "--->" + map.get(key));
}
//Define a BufferedReader input stream to read the response to the URL
in = new BufferedReader(new InputStreamReader(
connection.getInputStream()));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
} catch (Exception e) {
System.out.println(" send GET Request exception! " + e);
e.printStackTrace();
}
//Use a finally block to close the input stream
finally {
try {
if (in != null) {
in.close();
}
} catch (Exception e2) {
e2.printStackTrace();
}
}
return result;
}
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){//Using the proxy pattern
@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();
}
//Open the connection between and URL
//The following two lines must be set to send the POST request
conn.setDoOutput(true);
conn.setDoInput(true);
conn.setRequestMethod("POST"); //POST method
//Sets the generic request properties
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();
//Gets the output stream corresponding to the URLConnection object
out = new OutputStreamWriter(conn.getOutputStream(), "UTF-8");
//Send request parameters
out.write(param);
//Flush the buffer of the output stream
out.flush();
//Define a BufferedReader input stream to read the response to the URL
in = new BufferedReader(
new InputStreamReader(conn.getInputStream()));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
} catch (Exception e) {
System.out.println(" send POST Request exception! "+e);
e.printStackTrace();
}
//Use a finally block to close the output stream, the input stream
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: proxy access
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);
}
}
I hope this article has helped you learn Java programming.