java后端模拟http请求_java模拟http请求

最新推荐文章于 2022-06-19 16:14:47 发布

原创最新推荐文章于 2022-06-19 16:14:47 发布 · 377 阅读

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#java后端模拟http请求

这个Java类展示了如何使用Apache HttpClient库进行带cookie的GET和POST请求。它设置了连接超时和socket超时，并处理HTTP响应。登录方法通过POST提交用户名和密码，然后获取响应。

org.apache.httpcomponents

httpclient

4.2

public class HttpUtil {

private static DefaultHttpClient defaultHttpClient = null;

public static CookieStore cookieStore;

public static final int CONNECTIONTIMEOUT = 300000;

public static final int SOCKETTIMEOUT = 300000;

/**

* 带cookie的get提交

* @param urlpath

* @param encoding

* @return

public static String doHttpGetSetCookie(String urlpath, String encoding) {

HttpGet request = new HttpGet(urlpath);

try {

HttpParams httpParams = new BasicHttpParams();

HttpConnectionParams.setConnectionTimeout(httpParams, CONNECTIONTIMEOUT);

HttpConnectionParams.setSoTimeout(httpParams, SOCKETTIMEOUT);

if (defaultHttpClient == null) {

defaultHttpClient = new DefaultHttpClient(httpParams);

}

if (cookieStore != null) {

defaultHttpClient.setCookieStore(cookieStore);

}

HttpResponse response = defaultHttpClient.execute(request);

cookieStore = defaultHttpClient.getCookieStore();

if (response.getStatusLine().getStatusCode() == 200) {

Header str = response.getLastHeader("content-type");

if(str!=null&&str.toString().contains("text/html")){

System.out.println(response.getLastHeader("content-type"));

}

String string = EntityUtils.toString(response.getEntity(), encoding);

return string;

}

} catch (Exception e) {

e.printStackTrace();

}

return null;

}

/**

* 带cookie的post提交

* @param uri

* @param params

* @return

public static String doHttpPostSetCookie(String uri, List params) {

HttpPost hp = new HttpPost(uri);

try {

if (params != null) {

hp.setEntity(new UrlEncodedFormEntity(params, "UTF-8"));

}

if (defaultHttpClient == null) {

defaultHttpClient = new DefaultHttpClient();

}

defaultHttpClient.getParams().setParameter("http.connection.timeout", CONNECTIONTIMEOUT);

defaultHttpClient.getParams().setParameter("http.socket.timeout", SOCKETTIMEOUT);

if (cookieStore != null) {

defaultHttpClient.setCookieStore(cookieStore);

}

HttpResponse response = defaultHttpClient.execute(hp);

cookieStore = defaultHttpClient.getCookieStore();

if (response.getStatusLine().getStatusCode() == 200) {

HttpEntity entity = response.getEntity();

String string = EntityUtils.toString(entity,"UTF-8");

return string;

}

} catch (Exception e) {

e.printStackTrace();

}

return null;

}

public static void main(String[] args) {

}

private static void login() {

List params = new ArrayList();

params.add(new BasicNameValuePair("j_username", "admin"));

params.add(new BasicNameValuePair("j_password", "123456"));

String str = HttpUtil.doHttpPostSetCookie("http://127.0.0.1/j_spring_security_check",params);

System.out.println(str);

}