public synchronized void login(HttpClient httpClient,
String securityHost, String loginUrl,String userName,String password) throws Exception {
Exception exception = null;
GetMethod authget = null;
PostMethod authpost = null;
GetMethod redirect = null;
try {
httpClient.getParams().setCookiePolicy(
CookiePolicy.BROWSER_COMPATIBILITY);
authget = new GetMethod(securityHost + loginUrl);
httpClient.executeMethod(authget);
int statuscode = authget.getStatusCode();
authpost = new PostMethod(securityHost + "/j_security_check");
NameValuePair j_username = new NameValuePair("j_username", userName);
NameValuePair j_password = new NameValuePair("j_password", password);
authpost.setRequestBody(new NameValuePair[] { j_username, j_password });
httpClient.executeMethod(authpost);
statuscode = authpost.getStatusCode();
if ((statuscode == HttpStatus.SC_MOVED_TEMPORARILY)
|| (statuscode == HttpStatus.SC_MOVED_PERMANENTLY)
|| (statuscode == HttpStatus.SC_SEE_OTHER)
|| (statuscode == HttpStatus.SC_TEMPORARY_REDIRECT)) {
Header header = authpost.getResponseHeader("location");
if (header != null) {
String newuri = header.getValue();
if ((newuri == null) || (newuri.equals(""))) {
newuri = "/";
}
redirect = new GetMethod(newuri);
httpClient.executeMethod(redirect);
redirect.releaseConnection();
}
} else {
exception = new LoginErrorException("用户名或者密码错误");
}
} catch (Exception e) {
exception = e;
} finally {
if (authget != null)
authget.releaseConnection();
if (authpost != null)
authpost.releaseConnection();
if (redirect != null)
redirect.releaseConnection();
}
if (exception != null)
throw exception;
}