httpclient 用户名密码认证实例

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.apache.commons.httpclient.DefaultHttpMethodRetryHandler;
import org.apache.commons.httpclient.Header;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpException;
import org.apache.commons.httpclient.HttpStatus;
import org.apache.commons.httpclient.UsernamePasswordCredentials;
import org.apache.commons.httpclient.auth.AuthScope;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.httpclient.params.HttpMethodParams;

public class HttpClientUse {

public static void main(String[] args) throws HttpException, IOException {
HttpClient httpClient = new HttpClient();
//需要验证
UsernamePasswordCredentials creds = new UsernamePasswordCredentials("guest", "guest");

httpClient.getState().setCredentials(AuthScope.ANY, creds);

//设置http头
List <Header> headers = new ArrayList <Header>();
headers.add(new Header("User-Agent", "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1)"));
httpClient.getHostConfiguration().getParams().setParameter("http.default-headers", headers);

GetMethod method = new GetMethod("http://localhost:15672/api/exchanges/%2F/amq.direct");
method.setDoAuthentication(true);
method.getParams().setParameter(HttpMethodParams.RETRY_HANDLER,
new DefaultHttpMethodRetryHandler(3, false));
try {
int statusCode = httpClient.executeMethod(method);
if (statusCode != HttpStatus.SC_OK) {
System.out.println("Method failed code="+statusCode+": " + method.getStatusLine());

} else {
System.out.println(new String(method.getResponseBody(), "utf-8"));
}
} finally {
method.releaseConnection();
}
}
}