发布到Html/PHP表单的Java代码

我正在寻找一些方法/代码，了解如何转到URL，将字符串粘贴/键入这些文本框并点击登录按钮

<center><label>Username:   </label><input type="text" name="username"/></center>
<center><label>Password:   </label><input type="password" name="password"/><br/></center>
<center><input type="submit" value=" Login "/><br /></center>
</form>

用户名：
密码：

我对这一点很陌生，如果你能解释，请解释。

/*
* ====================================================================
*向Apache软件基金会（ASF）授权
*一个或多个参与者许可协议。见通知文件
*与此工作一起分发以获取更多信息
*关于版权所有权。ASF许可此文件
*根据Apache许可证，版本2.0（
*“许可证”）；除非符合规定，否则您不得使用此文件
*带着执照。您可以通过以下方式获得许可证副本：
*
*   http://www.apache.org/licenses/LICENSE-2.0
*
*除非适用法律要求或书面同意，
*根据许可证分发的软件在
*“按原样”的基础上，没有任何
*种类，无论是明示的还是暗示的。请参阅许可证以获取详细信息
*管理权限和限制的特定语言
*根据许可证。
* ====================================================================
*
*该软件由许多人的自愿捐款组成
*代表Apache软件基金会的个人。更多
*关于Apache软件基金会的信息，请参阅
* .
*
*/
包org.apache.http.examples；
导入java.io.ByteArrayInputStream；
导入java.net.Socket；
导入org.apache.http.connectionReuseStragey；
导入org.apache.http.HttpEntity；
导入org.apache.http.HttpHost；
导入org.apache.http.HttpRequestInterceptor；
导入org.apache.http.HttpResponse；
导入org.apache.http.HttpVersion；
导入org.apache.http.entity.ByteArrayEntity；
导入org.apache.http.entity.InputStreamEntity；
导入org.apache.http.entity.StringEntity；
导入org.apache.http.impl.defaultConnectionReuseStragey；
导入org.apache.http.impl.DefaultHttpClientConnection；
导入org.apache.http.message.BasicHttpEntityEnclosingRequest；
导入org.apache.http.params.HttpParams；
导入org.apache.http.params.HttpProtocolParams；
导入org.apache.http.params.SyncBasicHttpParams；
导入org.apache.http.protocol.HttpContext；
导入org.apache.http.protocol.BasicHttpContext；
导入org.apache.http.protocol.ExecutionContext；
导入org.apache.http.protocol.HttpProcessor；
导入org.apache.http.protocol.HttpRequestExecutor；
导入org.apache.http.protocol.ImmutableHttpProcessor；
导入org.apache.http.protocol.RequestConControl；
导入org.apache.http.protocol.RequestContent；
导入org.apache.http.protocol.RequestExpectContinue；
导入org.apache.http.protocol.RequestTargetHost；
导入org.apache.http.protocol.RequestUserAgent；
导入org.apache.http.util.EntityUtils；
/**
*按顺序执行多个POST请求的基本示例。
*
*请注意，此应用程序的目的是演示HttpCore API的使用。
*它并不打算演示构建HTTP客户端的最有效方法。
*/
公共类ElementalHttpPost{
公共静态void main（字符串[]args）引发异常{
HttpParams params=新的SyncBasicHttpParams（）；
HttpProtocolParams.setVersion（params，HttpVersion.HTTP_1_1）；
HttpProtocolParams.setContentCharset（参数，“UTF-8”）；
HttpProtocolParams.setUserAgent（参数，“测试/1.1”）；
HttpProtocolParams.setUseExpectContinue（params，true）；
HttpProcessor httpproc=新的不可变HttpProcessor（新的HttpRequestInterceptor[]{
//所需的协议拦截器
新建RequestContent（），
新建RequestTargetHost（），
//推荐的协议拦截器
新建RequestConnControl（），
新建RequestUserAgent（），
新的RequestExpectContinue（）}）；
HttpRequestExecutor httpexecutor=新的HttpRequestExecutor（）；
HttpContext=新的BasicHttpContext（null）；
HttpHost主机=新的HttpHost（“本地主机”，8080）；
DefaultHttpClientConnection conn=新的DefaultHttpClientConnection（）；
ConnectionReuseStragey connStrategy=新的默认ConnectionReuseStragey（）；
setAttribute（ExecutionContext.HTTP_连接，conn）；
setAttribute（ExecutionContext.HTTP_TARGET_HOST，HOST）；
试一试{
HttpEntity[]请求主体={
新StringEntity(
“这是第一个测试请求”，“UTF-8”），
新ByteArrayEntity(
“这是第二个测试请求”。getBytes（“UTF-8”），
新输入流(
新ByteArrayInputStream(
“这是第三个测试请求（将分块）”
.getBytes（“UTF-8”），-1）
};
for（int i=0；i>请求URI:”+Request.getRequestLine（）.getUri（））；
请求。setParams（params）；
预处理（请求、httpproc、上下文）；
HttpResponse response=httpexecutor.execute（请求、连接、上下文）；
响应。设置参数（参数）；
后处理（响应、httpproc、上下文）；
System.out.println（“？@bmorris591:看起来很有趣，很有希望，谢谢！我喜欢这个网站的另一个原因。
/*
 * ====================================================================
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 *
 */

package org.apache.http.examples;

import java.io.ByteArrayInputStream;
import java.net.Socket;

import org.apache.http.ConnectionReuseStrategy;
import org.apache.http.HttpEntity;
import org.apache.http.HttpHost;
import org.apache.http.HttpRequestInterceptor;
import org.apache.http.HttpResponse;
import org.apache.http.HttpVersion;
import org.apache.http.entity.ByteArrayEntity;
import org.apache.http.entity.InputStreamEntity;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.DefaultConnectionReuseStrategy;
import org.apache.http.impl.DefaultHttpClientConnection;
import org.apache.http.message.BasicHttpEntityEnclosingRequest;
import org.apache.http.params.HttpParams;
import org.apache.http.params.HttpProtocolParams;
import org.apache.http.params.SyncBasicHttpParams;
import org.apache.http.protocol.HttpContext;
import org.apache.http.protocol.BasicHttpContext;
import org.apache.http.protocol.ExecutionContext;
import org.apache.http.protocol.HttpProcessor;
import org.apache.http.protocol.HttpRequestExecutor;
import org.apache.http.protocol.ImmutableHttpProcessor;
import org.apache.http.protocol.RequestConnControl;
import org.apache.http.protocol.RequestContent;
import org.apache.http.protocol.RequestExpectContinue;
import org.apache.http.protocol.RequestTargetHost;
import org.apache.http.protocol.RequestUserAgent;
import org.apache.http.util.EntityUtils;

/**
 * Elemental example for executing multiple POST requests sequentially.
 * <p>
 * Please note the purpose of this application is demonstrate the usage of HttpCore APIs.
 * It is NOT intended to demonstrate the most efficient way of building an HTTP client.
 */
public class ElementalHttpPost {

    public static void main(String[] args) throws Exception {

        HttpParams params = new SyncBasicHttpParams();
        HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);
        HttpProtocolParams.setContentCharset(params, "UTF-8");
        HttpProtocolParams.setUserAgent(params, "Test/1.1");
        HttpProtocolParams.setUseExpectContinue(params, true);

        HttpProcessor httpproc = new ImmutableHttpProcessor(new HttpRequestInterceptor[] {
                // Required protocol interceptors
                new RequestContent(),
                new RequestTargetHost(),
                // Recommended protocol interceptors
                new RequestConnControl(),
                new RequestUserAgent(),
                new RequestExpectContinue()});

        HttpRequestExecutor httpexecutor = new HttpRequestExecutor();

        HttpContext context = new BasicHttpContext(null);

        HttpHost host = new HttpHost("localhost", 8080);

        DefaultHttpClientConnection conn = new DefaultHttpClientConnection();
        ConnectionReuseStrategy connStrategy = new DefaultConnectionReuseStrategy();

        context.setAttribute(ExecutionContext.HTTP_CONNECTION, conn);
        context.setAttribute(ExecutionContext.HTTP_TARGET_HOST, host);

        try {

            HttpEntity[] requestBodies = {
                    new StringEntity(
                            "This is the first test request", "UTF-8"),
                    new ByteArrayEntity(
                            "This is the second test request".getBytes("UTF-8")),
                    new InputStreamEntity(
                            new ByteArrayInputStream(
                                    "This is the third test request (will be chunked)"
                                    .getBytes("UTF-8")), -1)
            };

            for (int i = 0; i < requestBodies.length; i++) {
                if (!conn.isOpen()) {
                    Socket socket = new Socket(host.getHostName(), host.getPort());
                    conn.bind(socket, params);
                }
                BasicHttpEntityEnclosingRequest request = new BasicHttpEntityEnclosingRequest("POST",
                        "/servlets-examples/servlet/RequestInfoExample");
                request.setEntity(requestBodies[i]);
                System.out.println(">> Request URI: " + request.getRequestLine().getUri());

                request.setParams(params);
                httpexecutor.preProcess(request, httpproc, context);
                HttpResponse response = httpexecutor.execute(request, conn, context);
                response.setParams(params);
                httpexecutor.postProcess(response, httpproc, context);

                System.out.println("<< Response: " + response.getStatusLine());
                System.out.println(EntityUtils.toString(response.getEntity()));
                System.out.println("==============");
                if (!connStrategy.keepAlive(response, context)) {
                    conn.close();
                } else {
                    System.out.println("Connection kept alive...");
                }
            }
        } finally {
            conn.close();
        }
    }

}