JAVA Http Basic auth

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 * to you under the Apache License, Version 2.0 (the
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package org.apache.http.examples.client;

import org.apache.http.HttpHost;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.AuthCache;
import org.apache.http.client.CredentialsProvider;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.protocol.HttpClientContext;
import org.apache.http.impl.auth.BasicScheme;
import org.apache.http.impl.client.BasicAuthCache;
import org.apache.http.impl.client.BasicCredentialsProvider;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

/**
 * An example of HttpClient can be customized to authenticate
 * preemptively using BASIC scheme.
 * <b>
 * Generally, preemptive authentication can be considered less
 * secure than a response to an authentication challenge
 * and therefore discouraged.
 */
public class ClientPreemptiveBasicAuthentication {

    public static void main(String[] args) throws Exception {
        HttpHost target = new HttpHost("httpbin.org", 80, "http");
        CredentialsProvider credsProvider = new BasicCredentialsProvider();
        credsProvider.setCredentials(
                new AuthScope(target.getHostName(), target.getPort()),
                new UsernamePasswordCredentials("user", "passwd"));
        CloseableHttpClient httpclient = HttpClients.custom()
                .setDefaultCredentialsProvider(credsProvider).build();
        try {

            // Create AuthCache instance
            AuthCache authCache = new BasicAuthCache();
            // Generate BASIC scheme object and add it to the local
            // auth cache
            BasicScheme basicAuth = new BasicScheme();
            authCache.put(target, basicAuth);

            // Add AuthCache to the execution context
            HttpClientContext localContext = HttpClientContext.create();
            localContext.setAuthCache(authCache);

            HttpGet httpget = new HttpGet("http://httpbin.org/hidden-basic-auth/user/passwd");

            System.out.println("Executing request " + httpget.getRequestLine() + " to target " + target);
            for (int i = 0; i < 3; i++) {
                CloseableHttpResponse response = httpclient.execute(target, httpget, localContext);
                try {
                    System.out.println("----------------------------------------");
                    System.out.println(response.getStatusLine());
                    System.out.println(EntityUtils.toString(response.getEntity()));
                } finally {
                    response.close();
                }
            }
        } finally {
            httpclient.close();
        }
    }

}

JAVA Http Basic auth

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原文地址：http://www.cnblogs.com/xiaocandou/p/7991927.html