java URLConnection 测试连接 访问 网站
public class CallHtml {public static void callOnePage(String str) {try {int httpResult;URL url = new URL(str);URLConnection connection = url.openConnection();connection.connect();HttpURLConnection httpURLConnection = (HttpURLConnection) connection;httpResult = httpURLConnection.getResponseCode();if (httpResult != HttpURLConnection.HTTP_OK) {System.out.println("没有连接成功");} else {System.out.println("连接成功了");}} catch (Exception e) {// TODO: handle exception}}// 这个方法适当重载，就可以省去一些参数传递。public static void main(String[] args) {String str = "http://localhost:8080/seveneast/exam/student/student!toExam.do?pid=48"; CallHtml.callOnePage(str);//生成主页。 }}