添加520业务支持向redis中存放文件

src/main/java/com/nis/util/File2Redis.java

@@ -0,0 +1,50 @@
+package com.nis.util;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.HttpURLConnection;
+import java.net.URL;
+
+import com.nis.restful.RestBusinessCode;
+import com.nis.restful.ServiceRuntimeException;
+
+import redis.clients.jedis.Transaction;
+
+public class File2Redis {
+
+	public static String file2Redis(String url, Transaction transaction) {
+		try {
+			byte[] fileByte = downLoadFromUrl(url);
+			String md5 = MD5Utils.getMd5ByIS(new ByteArrayInputStream(fileByte));
+			String key = "redis://_FILE_" + md5;
+			transaction.set(key.getBytes(), fileByte);
+			return key;
+		} catch (Exception e) {
+			throw new ServiceRuntimeException("保存文件到redis发生了异常:" + e.getMessage(),
+					RestBusinessCode.SaveFileToRedisError.getValue());
+		}
+	}
+
+	public static byte[] downLoadFromUrl(String urlStr) throws IOException {
+		URL url = new URL(urlStr);
+		HttpURLConnection conn = (HttpURLConnection) url.openConnection();
+		// 设置超时间为30秒
+		conn.setConnectTimeout(3 * 10000);
+		// 防止屏蔽程序抓取而返回403错误
+		conn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");
+		// 得到输入流
+		InputStream inputStream = conn.getInputStream();
+		ByteArrayOutputStream baosOutputStream = new ByteArrayOutputStream();
+		byte[] buffer = new byte[1024];
+		int len;
+		while ((len = inputStream.read(buffer)) > -1) {
+			baosOutputStream.write(buffer, 0, len);
+		}
+		baosOutputStream.flush();
+		return baosOutputStream.toByteArray();
+	}
+
+
+}