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وحدة التحكم : REquestMapping (value = "/{loanid}/{atmttype}") public void dogge (pathvariable ("Loanid") string loanid ،@pathvariable ("atchtype") string atmttype ، httpservletrequest req ، httpservelsponse) hashmap <string ، string> () ؛ map.put ("Loanid" ، LoanId) ؛ خريطة <string ، string> urlbyloanid = new hashmap <string ، string> () ؛ // map <string ، string> urlbyloanid = zcmqueryinfoservice.queryurlbyloanid (map) ؛ حاول {if (urlbyloanid! = null) {String wjurl = "http://10.0.15.11:8080/gateway//nfs/marvel-core-admin/2017/11/Compact_Seal_17101119371231615_7.pdf" ؛ // string wjurl = urlbyloanid.get ("url") ؛ int i = wjurl.lastindexof ("/") ؛ اسم ملف السلسلة = wjurl.substring (i+1) ؛ url url = url new url (wjurl) ؛ httpurlConnection conn = (httpurlConnection) url.openconnection () ؛ // 设置超时间为 3 秒 conn.setConnectTimeout (3*1000) ؛ // 防止屏蔽程序抓取而返回 403 错误 conn.setRequestProperty ("user-agent" ، "Mozilla/4.0 (متوافق ؛ MSIE 5.0 ؛ Windows NT ؛ Digext)") ؛ // 得到输入流 inputStream inputStream = conn.getInputStream () ؛ // 获取自己数组 byte [] bs = readInputStream (inputStream) ؛ استجابة. الإخراج bufferedoutputstream = فارغ ؛ إدخال BufferEdInputStream = فارغ ؛ حاول {output = new BufferedOutputStream (response.getOutputStream ()) ؛ // 中文文件名必须转码为 ISO8859-1 ، 否则为乱码 String fileNamedown = new String (filename.getBytes () ، "ISO8859-1") ؛ // 作为附件下载 response.setheader ("disposition content" ، "filename =" + filenamedown) ؛ output.write (bs) ؛ استجابة. flushbuffer () ؛ } catch (استثناء e) {log.error ("تنزيل خطأ ملف السجل" ، e) ؛ } // 用户可能取消了下载 أخيرًا {if (input! = null) حاول {input.close () ؛ } catch (ioException e) {E.PrintStackTrace () ؛ } if (output! = null) حاول {output.close () ؛ } catch (ioException e) {E.PrintStackTrace () ؛ }}}} catch (استثناء e) {E.PrintStackTrace () ؛ }}/ ** * 从输入流中获取字节数组 * param inputStream * return * throws ioException */ public static byte [] readInputStream (inputStream inputStream) يلقي ioException {byte [] buffer = new byte [1024] ؛ int len = 0 ؛ bytearrayoutputstream bos = جديد bytearrayoutputStream () ؛ بينما ((len = inputStream.Read (buffer))! = -1) {bos.write (buffer ، 0 ، len) ؛ } bos.close () ؛ إرجاع bos.tobytearray () ؛ }以上这篇 java 通过 url 下载文件并输出的方法就是小编分享给大家的全部内容了 , 希望能给大家一个参考 , 也希望大家多多支持武林网。