java代码访问百度,返回html页面代码

不念不忘少年蓝@ 2024-02-18 16:24 45阅读 0赞

package Mytest.model.test;
    
    import java.io.ByteArrayOutputStream;
    import java.io.IOException;
    import java.io.InputStream;
    import java.net.HttpURLConnection;
    import java.net.URL;
    public class HttpBaiduDemo {
        public static void main(String[] args) throws IOException {
            /**
             * java代码访问百度
             * 1.创建URL对象
             * 2.创建Http链接
             */
            URL url = new URL("http://www.baidu.com");
            HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
            /**
             * 3.设置请求方式
             * 4.设施请求内容类型
             */
            httpURLConnection.setRequestMethod("GET");
            httpURLConnection.setRequestProperty("Content-type", "application/x-www-form-urlencoded");
            httpURLConnection.setDoInput(true);
            httpURLConnection.setDoOutput(true);
            /**
             * 5.设置请求参数
             * 6.使用输出流发送参数
             */
            //String content="username:";
            //OutputStream outputStream = httpURLConnection.getOutputStream();
            //outputStream.write(content.getBytes());
            /**
             * 7.使用输入流接受数据
             */
            InputStream inputStream = httpURLConnection.getInputStream();
            ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();//此处可以用Stringbuffer等接收
            byte[] b = new byte[1024];
            int len=0;
            while (true) {
                len=inputStream.read(b);
                if (len == -1) {
                    break;
                }
                byteArrayOutputStream.write(b,0,len);
            }
            System.out.println(byteArrayOutputStream.toString());
        }
    }