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mhotel/src/com/happy/Until/DownloadPicture.java

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+package com.happy.Until;
+
+import com.happy.common.http.HttpsClient;
+
+import java.io.ByteArrayOutputStream;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.InputStream;
+import java.net.HttpURLConnection;
+import java.net.URL;
+
+public class DownloadPicture {
+
+    public static byte[] readInputStream(InputStream inStream) throws Exception {
+        ByteArrayOutputStream outStream = new ByteArrayOutputStream();
+        //创建一个Buffer字符串
+        byte[] buffer = new byte[6024];
+        //每次读取的字符串长度，如果为-1，代表全部读取完毕
+        int len;
+        //使用一个输入流从buffer里把数据读取出来
+        while ((len = inStream.read(buffer)) != -1) {
+            //用输出流往buffer里写入数据，中间参数代表从哪个位置开始读，len代表读取的长度
+            outStream.write(buffer, 0, len);
+        }
+        //关闭输入流
+        inStream.close();
+        //把outStream里的数据写入内存
+        return outStream.toByteArray();
+    }
+
+    public static File download(String durl) throws Exception {
+        //定义一个URL对象，就是你想下载的图片的URL地址
+        URL url = new URL(durl);
+        //打开连接
+        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
+        //设置请求方式为"GET"
+        conn.setRequestMethod("GET");
+        //超时响应时间为10秒
+        conn.setConnectTimeout(10 * 1000);
+        //通过输入流获取图片数据
+        InputStream is = conn.getInputStream();
+        //得到图片的二进制数据，以二进制封装得到数据，具有通用性
+        byte[] data = readInputStream(is);
+        //创建一个文件对象用来保存图片，默认保存当前工程根目录，起名叫Copy.jpg
+        File imageFile = File.createTempFile("temp", ".jpg");
+        //创建输出流
+        FileOutputStream outStream = new FileOutputStream(imageFile);
+        //写入数据
+        outStream.write(data);
+        //关闭输出流，释放资源
+        outStream.close();
+        return imageFile;
+    }
+
+}