JAVA傳送HTTP請求方式總結
阿新 • • 發佈:2019-01-10
java 傳送HTTP請求方式總結
1. HttpURLConnection
使用JDK原生提供的net,無需其他jar包;
HttpURLConnection是URLConnection的子類,提供更多的方法,使用更方便。
package httpURLConnection; import java.io.BufferedReader; import java.io.InputStream; import java.io.InputStreamReader; import java.net.HttpURLConnection; import java.net.URL; public class HttpURLConnectionHelper { public static String sendRequest(String urlParam,String requestType) { HttpURLConnection con = null; BufferedReader buffer = null; StringBuffer resultBuffer = null; try { URL url = new URL(urlParam); //得到連線物件 con = (HttpURLConnection) url.openConnection(); //設定請求型別 con.setRequestMethod(requestType); //設定請求需要返回的資料型別和字符集型別 con.setRequestProperty("Content-Type", "application/json;charset=GBK"); //允許寫出 con.setDoOutput(true); //允許讀入 con.setDoInput(true); //不使用快取 con.setUseCaches(false); //得到響應碼 int responseCode = con.getResponseCode(); if(responseCode == HttpURLConnection.HTTP_OK){ //得到響應流 InputStream inputStream = con.getInputStream(); //將響應流轉換成字串 resultBuffer = new StringBuffer(); String line; buffer = new BufferedReader(new InputStreamReader(inputStream, "GBK")); while ((line = buffer.readLine()) != null) { resultBuffer.append(line); } return resultBuffer.toString(); } }catch(Exception e) { e.printStackTrace(); } return ""; } public static void main(String[] args) { String url ="http://int.dpool.sina.com.cn/iplookup/iplookup.php?ip=120.79.75.96"; System.out.println(sendRequest(url,"POST")); } }
2. URLConnection
使用JDK原生提供的net,無需其他jar包;
建議使用HttpURLConnection
package uRLConnection; import java.io.BufferedReader; import java.io.InputStream; import java.io.InputStreamReader; import java.net.HttpURLConnection; import java.net.URL; import java.net.URLConnection; public class URLConnectionHelper { public static String sendRequest(String urlParam) { URLConnection con = null; BufferedReader buffer = null; StringBuffer resultBuffer = null; try { URL url = new URL(urlParam); con = url.openConnection(); //設定請求需要返回的資料型別和字符集型別 con.setRequestProperty("Content-Type", "application/json;charset=GBK"); //允許寫出 con.setDoOutput(true); //允許讀入 con.setDoInput(true); //不使用快取 con.setUseCaches(false); //得到響應流 InputStream inputStream = con.getInputStream(); //將響應流轉換成字串 resultBuffer = new StringBuffer(); String line; buffer = new BufferedReader(new InputStreamReader(inputStream, "GBK")); while ((line = buffer.readLine()) != null) { resultBuffer.append(line); } return resultBuffer.toString(); }catch(Exception e) { e.printStackTrace(); } return ""; } public static void main(String[] args) { String url ="http://int.dpool.sina.com.cn/iplookup/iplookup.php?ip=120.79.75.96"; System.out.println(sendRequest(url)); } }
3. HttpClient
使用方便,我個人偏愛這種方式,但依賴於第三方jar包,相關maven依賴如下:
<!-- https://mvnrepository.com/artifact/commons-httpclient/commons-httpclient --> <dependency> <groupId>commons-httpclient</groupId> <artifactId>commons-httpclient</artifactId> <version>3.1</version> </dependency
package httpClient;
import java.io.IOException;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpException;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.httpclient.methods.PostMethod;
import org.apache.commons.httpclient.params.HttpMethodParams;
public class HttpClientHelper {
public static String sendPost(String urlParam) throws HttpException, IOException {
// 建立httpClient例項物件
HttpClient httpClient = new HttpClient();
// 設定httpClient連線主機伺服器超時時間:15000毫秒
httpClient.getHttpConnectionManager().getParams().setConnectionTimeout(15000);
// 建立post請求方法例項物件
PostMethod postMethod = new PostMethod(urlParam);
// 設定post請求超時時間
postMethod.getParams().setParameter(HttpMethodParams.SO_TIMEOUT, 60000);
postMethod.addRequestHeader("Content-Type", "application/json");
httpClient.executeMethod(postMethod);
String result = postMethod.getResponseBodyAsString();
postMethod.releaseConnection();
return result;
}
public static String sendGet(String urlParam) throws HttpException, IOException {
// 建立httpClient例項物件
HttpClient httpClient = new HttpClient();
// 設定httpClient連線主機伺服器超時時間:15000毫秒
httpClient.getHttpConnectionManager().getParams().setConnectionTimeout(15000);
// 建立GET請求方法例項物件
GetMethod getMethod = new GetMethod(urlParam);
// 設定post請求超時時間
getMethod.getParams().setParameter(HttpMethodParams.SO_TIMEOUT, 60000);
getMethod.addRequestHeader("Content-Type", "application/json");
httpClient.executeMethod(getMethod);
String result = getMethod.getResponseBodyAsString();
getMethod.releaseConnection();
return result;
}
public static void main(String[] args) throws HttpException, IOException {
String url ="http://int.dpool.sina.com.cn/iplookup/iplookup.php?ip=120.79.75.96";
System.out.println(sendPost(url));
System.out.println(sendGet(url));
}
}
4. Socket
使用JDK原生提供的net,無需其他jar包;
使用起來有點麻煩。
package socket;
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.Socket;
import java.net.URLEncoder;
import javax.net.ssl.SSLSocket;
import javax.net.ssl.SSLSocketFactory;
public class SocketForHttpTest {
private int port;
private String host;
private Socket socket;
private BufferedReader bufferedReader;
private BufferedWriter bufferedWriter;
public SocketForHttpTest(String host,int port) throws Exception{
this.host = host;
this.port = port;
/**
* http協議
*/
// socket = new Socket(this.host, this.port);
/**
* https協議
*/
socket = (SSLSocket)((SSLSocketFactory)SSLSocketFactory.getDefault()).createSocket(this.host, this.port);
}
public void sendGet() throws IOException{
//String requestUrlPath = "/z69183787/article/details/17580325";
String requestUrlPath = "/";
OutputStreamWriter streamWriter = new OutputStreamWriter(socket.getOutputStream());
bufferedWriter = new BufferedWriter(streamWriter);
bufferedWriter.write("GET " + requestUrlPath + " HTTP/1.1\r\n");
bufferedWriter.write("Host: " + this.host + "\r\n");
bufferedWriter.write("\r\n");
bufferedWriter.flush();
BufferedInputStream streamReader = new BufferedInputStream(socket.getInputStream());
bufferedReader = new BufferedReader(new InputStreamReader(streamReader, "utf-8"));
String line = null;
while((line = bufferedReader.readLine())!= null){
System.out.println(line);
}
bufferedReader.close();
bufferedWriter.close();
socket.close();
}
public void sendPost() throws IOException{
String path = "/";
String data = URLEncoder.encode("name", "utf-8") + "=" + URLEncoder.encode("張三", "utf-8") + "&" +
URLEncoder.encode("age", "utf-8") + "=" + URLEncoder.encode("32", "utf-8");
// String data = "name=zhigang_jia";
System.out.println(">>>>>>>>>>>>>>>>>>>>>"+data);
OutputStreamWriter streamWriter = new OutputStreamWriter(socket.getOutputStream(), "utf-8");
bufferedWriter = new BufferedWriter(streamWriter);
bufferedWriter.write("POST " + path + " HTTP/1.1\r\n");
bufferedWriter.write("Host: " + this.host + "\r\n");
bufferedWriter.write("Content-Length: " + data.length() + "\r\n");
bufferedWriter.write("Content-Type: application/x-www-form-urlencoded\r\n");
bufferedWriter.write("\r\n");
bufferedWriter.write(data);
bufferedWriter.write("\r\n");
bufferedWriter.flush();
BufferedInputStream streamReader = new BufferedInputStream(socket.getInputStream());
bufferedReader = new BufferedReader(new InputStreamReader(streamReader, "utf-8"));
String line = null;
while((line = bufferedReader.readLine())!= null)
{
System.out.println(line);
}
bufferedReader.close();
bufferedWriter.close();
socket.close();
}
public static void main(String[] args) throws Exception {
/**
* http協議測試
*/
//SocketForHttpTest forHttpTest = new SocketForHttpTest("www.baidu.com", 80);
/**
* https協議測試
*/
SocketForHttpTest forHttpTest = new SocketForHttpTest("www.baidu.com", 443);
try {
forHttpTest.sendGet();
// forHttpTest.sendPost();
} catch (IOException e) {
e.printStackTrace();
}
}
}