package cn.itcast.service;//其实就是从网络获取byte 然后转换成文件 import java.io.DataOutputStream; import java.io.File; import java.io.FileOutputStream; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.URL; import cn.itcast.utils.StreamTool; public class HtmlService { public static String getHtml(String path) throws Exception { URL url = new URL(path); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); conn.setRequestMethod("GET"); conn.setConnectTimeout(5 * 1000); InputStream inStream = conn.getInputStream();// 通过输入流获取html数据 byte[] data = StreamTool.readInputStream(inStream);// 得到html的二进制数据 DataOutputStream dataOutputStream = new DataOutputStream(new FileOutputStream("sdcard/tips.txt"));//把byte写入文件 dataOutputStream.write(data); dataOutputStream.flush(); String html = new String(data, "utf-8"); return html; } }

package cn.itcast.utils;import java.io.ByteArrayOutputStream;import java.io.InputStream;public class StreamTool {	/**	 * 从输入流中获取数据	 * @param inStream 输入流	 * @return	 * @throws Exception	 */	public static byte[] readInputStream(InputStream inStream) throws Exception{		ByteArrayOutputStream outStream = new ByteArrayOutputStream();		byte[] buffer = new byte[1024];		int len = 0;		while( (len=inStream.read(buffer)) != -1 ){			outStream.write(buffer, 0, len);		}		inStream.close();		return outStream.toByteArray();	}}