java發送請求,java發送請求怎麼添加服務註冊

本文目錄一覽：

• 1、java中怎樣用post，get，put請求
• 2、如何使用java 發送post請求
• 3、求教java程序怎麼向網頁伺服器發送請求

java中怎樣用post，get，put請求

java中用post，get，put請求方法：

public static String javaHttpGet(String url,String charSet){

String resultData = null;

try {

URL pathUrl = new URL(url); //創建一個URL對象

HttpURLConnection urlConnect = (HttpURLConnection) pathUrl.openConnection(); //打開一個HttpURLConnection連接

urlConnect.setConnectTimeout(30000); // 設置連接超時時間

urlConnect.connect();

if (urlConnect.getResponseCode() == 200) { //請求成功

resultData = readInputStream(urlConnect.getInputStream(), charSet);

}

} catch (MalformedURLException e) {

LogL.getInstance().getLog().error(“URL出錯！”, e);

} catch (IOException e) {

LogL.getInstance().getLog().error(“讀取數據流出錯！”, e);

}

return resultData;

}

public static String javaHttpPost(String url,MapString,Object map,String charSet){

String resultData=null;

StringBuffer params = new StringBuffer();

try {

IteratorEntryString, Object ir = map.entrySet().iterator();

while (ir.hasNext()) {

Map.EntryString, Object entry = (Map.EntryString, Object) ir.next();

params.append(URLEncoder.encode(entry.getKey(),charSet) + “=” + URLEncoder.encode(entry.getValue().toString(), charSet) + “”);

}

byte[] postData = params.deleteCharAt(params.length()).toString().getBytes();

URL pathUrl = new URL(url); //創建一個URL對象

HttpURLConnection urlConnect = (HttpURLConnection) pathUrl.openConnection();

urlConnect.setConnectTimeout(30000); // 設置連接超時時間

urlConnect.setDoOutput(true); //post請求必須設置允許輸出

urlConnect.setUseCaches(false); //post請求不能使用緩存

urlConnect.setRequestMethod(“POST”); //設置post方式請求

urlConnect.setInstanceFollowRedirects(true);

urlConnect.setRequestProperty(“Content-Type”,”application/x-www-form-urlencoded; charset=”+charSet);// 配置請求Content-Type

urlConnect.connect(); // 開始連接

DataOutputStream dos = new DataOutputStream(urlConnect.getOutputStream()); // 發送請求參數

dos.write(postData);

dos.flush();

dos.close();

if (urlConnect.getResponseCode() == 200) { //請求成功

resultData = readInputStream(urlConnect.getInputStream(),charSet);

}

} catch (MalformedURLException e) {

LogL.getInstance().getLog().error(“URL出錯！”, e);

} catch (IOException e) {

LogL.getInstance().getLog().error(“讀取數據流出錯！”, e);

} catch (Exception e) {

LogL.getInstance().getLog().error(“POST出錯！”, e);

}

return resultData;

}

如何使用java 發送post請求

/**

* 向指定 URL 發送POST方法的請求

*

* @param url

* 發送請求的 URL

* @param param

* 請求參數，請求參數應該是 name1=value1name2=value2 的形式。

* @return 所代表遠程資源的響應結果

*/

public static String sendPost(String url, String param) {

PrintWriter out = null;

BufferedReader in = null;

String result = “”;

try {

URL realUrl = new URL(url);

// 打開和URL之間的連接

URLConnection conn = realUrl.openConnection();

// 設置通用的請求屬性

conn.setRequestProperty(“accept”, “*/*”);

conn.setRequestProperty(“connection”, “Keep-Alive”);

conn.setRequestProperty(“user-agent”,

“Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)”);

// 發送POST請求必須設置如下兩行

conn.setDoOutput(true);

conn.setDoInput(true);

// 獲取URLConnection對象對應的輸出流

out = new PrintWriter(conn.getOutputStream());

// 發送請求參數

out.print(param);

// flush輸出流的緩衝

out.flush();

// 定義BufferedReader輸入流來讀取URL的響應

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 請求出現異常！”+e);

e.printStackTrace();

}

//使用finally塊來關閉輸出流、輸入流

finally{

try{

if(out!=null){

out.close();

}

if(in!=null){

in.close();

}

}

catch(IOException ex){

ex.printStackTrace();

}

}

return result;

}

求教java程序怎麼向網頁伺服器發送請求

POST方式發送請求示例： String fullurl = url; //打開連接 URLConnection conn =new URL(fullurl).openConnection(); //設置通用的請求屬性 conn.setRequestProperty(“accept”, “*/*”); conn.setRequestProperty(“connection”, “Keep-Alive”); conn.setRequestProperty(“user-agent”, “Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2311.90 Safari/537.36”); //發送POST請求必須設置下面兩行 conn.setDoInput(true); conn.setDoOutput(true); try ( //獲取URLConnection對象對應的輸出流 PrintWriter out = new PrintWriter(conn.getOutputStream());) { out.print(parm);//發送請求參數(key1=value1key2=value2) out.flush();//flush輸出流的緩衝 } catch (Exception e) {} //獲取響應頭欄位 MapString, ListString map = conn.getHeaderFields(); //根據輸入流讀取響應數據 InputStream is = conn.getInputStream();