package http;import com.gargoylesoftware.htmlunit.WebClient;import com.gargoylesoftware.htmlunit.html.HtmlElement;import com.gargoylesoftware.htmlunit.html.HtmlPage;public class http {    public static void main(String[] args) throws Exception {    WebClient webClient =  new WebClient();//创建WebClient    HtmlPage page = webClient.getPage("http://*****/wp-admin/");    //打开百度    //获得name为"登陆"的html元素    HtmlElement htmlElement = page.getElementByName("wp-submit");     page = htmlElement.click();//调用click()方法    //获得name为"username"的html元素    HtmlElement usernameEle = page.getElementByName("user_login");     //获得id为"password"的html元素    HtmlElement passwordEle = (HtmlElement) page.getElementById("user_pass");    usernameEle.focus();   //设置输入焦点    usernameEle.type("***");  //填写值    passwordEle.focus();   //设置输入焦点    passwordEle.type("****");  //填写值    //获得name为"登陆"的元素     HtmlElement submitEle = page.getElementByName("登陆");     //点击“登陆”    page = submitEle.click();    String result = page.asXml();//获得click()后的html页面（包括标签）    if(result.contains("登陆成功！")){         System.out.println("登陆成功");         }else{         System.out.println("登陆失败");    }  }}

http://www.cnblogs.com/cha1r/p/3410966.html

package http;import java.util.ArrayList;  import java.util.List;   import org.apache.http.HttpEntity;import org.apache.http.HttpResponse;import org.apache.http.NameValuePair;import org.apache.http.client.HttpClient;  import org.apache.http.client.entity.UrlEncodedFormEntity;  import org.apache.http.client.methods.HttpPost;  import org.apache.http.impl.client.DefaultHttpClient;  import org.apache.http.message.BasicNameValuePair;import org.apache.http.util.EntityUtils;public class httptests {    /**      * @param args      * @throws Exception      */      public static void main(String[] args) throws Exception {          try {            HttpClient client = new DefaultHttpClient();                //构建一个Client            HttpPost post = new HttpPost("http://mail.163.com/");    //构建一个POST请求            //构建表单参数            List
     
       formParams = new ArrayList
      
       ();            formParams.add(new BasicNameValuePair("username", "********"));            formParams.add(new BasicNameValuePair("password", "*****"));            UrlEncodedFormEntity entity = new UrlEncodedFormEntity(formParams, "UTF-8");//将表单参数转化为“实体”            post.setEntity(entity);        //将“实体“设置到POST请求里                                  HttpResponse response = client.execute(post);//提交POST请求            HttpEntity result = response.getEntity();//拿到返回的HttpResponse的"实体"            String content = EntityUtils.toString(result);;            //用httpcore.jar提供的工具类将"实体"转化为字符串打印到控制台            System.out.println(content);            if(content.contains("登陆成功")){            System.out.println("登陆成功！！！");            }            } catch (Exception e) {            e.printStackTrace();            }                                               //        HttpClient httpclient = new HttpClient();  //        PostMethod httpPost =new PostMethod("******/abc");  //        NameValuePair[] param = { new NameValuePair("username", "vip")};  //        httpPost.setRequestBody(param);   //        httpclient.executeMethod(httpPost);      }  }