public static void main(String[] args) throws Exception {??????? BasicCookieStore cookieStore = new BasicCookieStore();??????? CloseableHttpClient httpclient = HttpClients.custom()??????????????? .setDefaultCookieStore(cookieStore)??????????????? .build();??????? try {??????????? HttpGet httpget = new HttpGet("https://someportal/");??????????? CloseableHttpResponse response1 = httpclient.execute(httpget);??????????? try {??????????????? HttpEntity entity = response1.getEntity();??????????????? System.out.println("Login form get: " + response1.getStatusLine());??????????????? EntityUtils.consume(entity);??????????????? System.out.println("Initial set of cookies:");??????????????? List<Cookie> cookies = cookieStore.getCookies();??????????????? if (cookies.isEmpty()) {??????????????????? System.out.println("None");??????????????? } else {??????????????????? for (int i = 0; i < cookies.size(); i++) {??????????????????????? System.out.println("- " + cookies.get(i).toString());??????????????????? }??????????????? }??????????? } finally {??????????????? response1.close();??????????? }??????????? HttpUriRequest login = RequestBuilder.post()??????????????????? .setUri(new URI("https://someportal/"))??????????????????? .addParameter("IDToken1", "username")??????????????????? .addParameter("IDToken2", "password")??????????????????? .build();??????????? CloseableHttpResponse response2 = httpclient.execute(login);??????????? try {??????????????? HttpEntity entity = response2.getEntity();??????????????? System.out.println("Login form get: " + response2.getStatusLine());??????????????? EntityUtils.consume(entity);??????????????? System.out.println("Post logon cookies:");??????????????? List<Cookie> cookies = cookieStore.getCookies();??????????????? if (cookies.isEmpty()) {??????????????????? System.out.println("None");??????????????? } else {??????????????????? for (int i = 0; i < cookies.size(); i++) {??????????????????????? System.out.println("- " + cookies.get(i).toString());??????????????????? }??????????????? }??????????? } finally {??????????????? response2.close();??????????? }??????? } finally {??????????? httpclient.close();??????? }??? }
5 回答
開心每一天1111
TA貢獻1836條經驗 獲得超13個贊
// 使用HttpClient發送請求、接收響應很簡單，一般需要如下幾步即可。
// 1. 創建HttpClient對象。
// 2. 創建請求方法的實例，并指定請求URL。如果需要發送GET請求，創建HttpGet對象；如果需要發送POST請求，創建HttpPost對象。
// 3. 如果需要發送請求參數，可調用HttpGet、HttpPost共同的setParams(HetpParams params)方法來添加請求參數；對于HttpPost對象而言，也可調用setEntity(HttpEntity entity)方法來設置請求參數。
// 4. 調用HttpClient對象的execute(HttpUriRequest request)發送請求，該方法返回一個HttpResponse。
// 5. 調用HttpResponse的getAllHeaders()、getHeaders(String name)等方法可獲取服務器的響應頭；調用HttpResponse的getEntity()方法可獲取HttpEntity對象，該對象包裝了服務器的響應內容。程序可通過該對象獲取服務器的響應內容。
// 6. 釋放連接。無論執行方法是否成功，都必須釋放連接
//入口函數
public static void main(String[] args) throws Exception {
??????? //cookie存儲類
??????? BasicCookieStore cookieStore = new BasicCookieStore();
??????? //創建一個httpclient，并設置默認cookie存儲cookieStore
??????? CloseableHttpClient httpclient = HttpClients.custom()
??????????????? .setDefaultCookieStore(cookieStore)
??????????????? .build();
??????? try {
??????????? //創建HttpGet對象,需要發送GET請求https://someportal/
??????????? HttpGet httpget = new HttpGet("https://someportal/");
??????????? //HttpClient對象的execute(HttpUriRequest request)發送請求
??????????? CloseableHttpResponse response1 = httpclient.execute(httpget);
??????????? //try開始，試圖執行
??????????? try {
??????????????? //獲取服務器返回的HttpEntity對象
??????????????? HttpEntity entity = response1.getEntity();
??????????????? //打印返回信息，response.getStatusLine().getStatusCode()==200鏈接成功，==500失敗。
??????????????? System.out.println("Login form get: " + response1.getStatusLine());
??????????????? //HttpEntity對象提供的靜態幫助類,EntityUtils.consume關閉資源
??????????????? EntityUtils.consume(entity);
??????????????? //打印Initial set of cookies:
??????????????? System.out.println("Initial set of cookies:");
??????????????? //獲取Cookies并循環，空的輸出None，否則輸出cookie
??????????????? List<Cookie> cookies = cookieStore.getCookies();
??????????????? if (cookies.isEmpty()) {
??????????????????? System.out.println("None");
??????????????? } else {
??????????????????? for (int i = 0; i < cookies.size(); i++) {
??????????????????????? System.out.println("- " + cookies.get(i).toString());
??????????????????? }
??????????????? }
??????????? } finally {
??????????????? //關閉
??????????????? response1.close();
??????????? }
??????????? //POST請求，并設置URI和參數
??????????? HttpUriRequest login = RequestBuilder.post()
??????????????????? .setUri(new URI("https://someportal/"))
??????????????????? .addParameter("IDToken1", "username")
??????????????????? .addParameter("IDToken2", "password")
??????????????????? .build();
??????????? //執行POST請求
??????????? CloseableHttpResponse response2 = httpclient.execute(login);
??????????? try {
??????????????? //獲取實體對象
??????????????? HttpEntity entity = response2.getEntity();
??????????????? //打印服務器返回信息
??????????????? System.out.println("Login form get: " + response2.getStatusLine());
??????????????? //關閉流
??????????????? EntityUtils.consume(entity);
??????????????? //打印cookie
??????????????? System.out.println("Post logon cookies:");
??????????????? List<Cookie> cookies = cookieStore.getCookies();
??????????????? if (cookies.isEmpty()) {
??????????????????? System.out.println("None");
??????????????? } else {
??????????????????? for (int i = 0; i < cookies.size(); i++) {
??????????????????????? System.out.println("- " + cookies.get(i).toString());
??????????????????? }
??????????????? }
??????????? } finally {
??????????????? response2.close();
??????????? }
??????? } finally {
??????????? //關閉httpclient
??????????? httpclient.close();
??????? }
??? }
慕的地6264312
TA貢獻1817條經驗 獲得超6個贊
public static void main（String [] args）{拋出異常
basiccookiestore =新basiccookiestore()存儲機制；
closeablehttpclient HttpClient = httpclients custom()。
setdefaultcookiestore（存儲機制）。
build()；
嘗試{
HttpGet HttpGet =新HttpGet（“https：/ / someportal /”）；
closeablehttpresponse response1 = HttpClient執行（HTTPGET）；
嘗試{
HttpEntity實體= response1 getentity()；
系統。了。println（“登錄形式得到：“+ response1 getstatusline()。）；
entityutils消耗（實體）；
系統。了。println（“初始設定的餅干：“）；
列表<餅干>餅干= getcookies()存儲機制；
如果（餅干。isempty()）{
系統。了println（“無”）；
{ }
為（int i = 0；i <餅干。size()；i++）{
系統。了。println（“-”+餅干。讓（我）。tostring()）；
}
}
最后{
response1（）；
}
httpurirequest登錄= requestbuilder post()。
seturi。（新的URI（“http：/ / someportal /”））
addparameter。（“idtoken1”，“用戶名”）
addparameter。（“idtoken2”，“密碼”）
build()；
closeablehttpresponse反應= HttpClient執行（登錄）；
嘗試{
HttpEntity實體=反應。getentity()；
系統。了。println（“登錄形式得到：“+反應。getstatusline()）；
entityutils消耗（實體）；
系統。了。println（“后登錄餅干：”）；
列表<餅干>餅干= getcookies()存儲機制；
如果（餅干。isempty()）{
系統。了println（“無”）；
{ }
為（int i = 0；i <餅干。size()；i++）{
系統。了。println（“-”+餅干。讓（我）。tostring()）；
}
}
最后{
反應。（）；
}
最后{
HttpClient（）；
}
}
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