场景：调用接口完成某项操作，但是接口是强登录的，需要cookie, 且cookie会过期；服务器会限制登录的次数，如果一个账号频繁登录，则在短时间内无法正常登录，因此无法做到每调用接口一次就登录一次，且这样的效率也会比较低；
方法： 采用httpClient获取cookie, 并在接口上加入cookie校验；
核心代码：
0. 需要加入的jar包
1 import org.apache.commons.lang.StringUtils; 2 import org.apache.commons.httpclient.HttpClient; 3 import org.apache.commons.httpclient.methods.GetMethod; 4 import org.apache.http.Header; 5 import org.apache.http.HttpResponse; 6 import org.apache.http.HttpStatus; 7 import org.apache.http.StatusLine; 8 import org.apache.http.client.CookieStore; 9 10 import org.apache.http.client.HttpClient; 11 import org.apache.http.client.methods.HttpGet; 12 import org.apache.commons.httpclient.methods.GetMethod; 13 14 import org.apache.http.client.methods.HttpPost; 15 16 import org.apache.http.cookie.Cookie; 17 import org.apache.http.impl.client.BasicCookieStore; 18 19 import org.apache.http.impl.client.HttpClients; 20 import org.apache.http.protocol.BasicHttpContext; 21 import org.apache.http.protocol.HttpContext;