java - 下载文件的时候 ，文件名中包含 中括号， 导致下载失败！

Question

1.使用Xutil 进行的文件下载
2.只要文件中有 中括号，就会下载失败，另起一个名字， 可以下载成功

爆出的异常为:

java.net.URISyntaxException: Illegal character in path at index 68...
at libcore.net.UriCodec.validate(UriCodec.java:63)
at java.net.URI.parseURI(URI.java:402)

异常详细如下：

08-16 10:06:50.183 31228-31228/ E/URIBuilder.<init>(L:55): Illegal character in path at index 68: http://***cn:8099/sczh//upload/5f534d87a3e148048b275ea5858f27f9[202]再试一下.doc
                                                                              java.net.URISyntaxException: Illegal character in path at index 68: http://**h//upload/5f534d87a3e148048b275ea5858f27f9[202]再试一下.doc
                                                                                  at libcore.net.UriCodec.validate(UriCodec.java:63)
                                                                                  at java.net.URI.parseURI(URI.java:402)
                                                                                  at java.net.URI.<init>(URI.java:204)
                                                                                  at com.lidroid.xutils.http.client.util.URIBuilder.<init>(URIBuilder.java:53)
                                                                                  at com.lidroid.xutils.http.client.HttpRequest.setURI(HttpRequest.java:156)
                                                                                  at com.lidroid.xutils.http.client.HttpRequest.<init>(HttpRequest.java:60)
                                                                                  at com.lidroid.xutils.HttpUtils.download(HttpUtils.java:297)
                                                                                  at com.lidroid.xutils.HttpUtils.download(HttpUtils.java:263)
                                                                                  at com.fenghua.traffic.activity.GongGaoInfoActivity.onClick(GongGaoInfoActivity.java:193)
                                                                                  at android.view.View.performClick(View.java:5200)
                                                                                  at android.view.View$PerformClick.run(View.java:21163)
                                                                                  at android.os.Handler.handleCallback(Handler.java:739)
                                                                                  at android.os.Handler.dispatchMessage(Handler.java:95)
                                                                                  at android.os.Looper.loop(Looper.java:148)
                                                                                  at android.app.ActivityThread.main(ActivityThread.java:5459)
                                                                                  at java.lang.reflect.Method.invoke(Native Method)
                                                                                  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:738)
                                                                                  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:628)
08-16 10:06:50.187 31228-31650/com.fenghua.traffic E/RetryHandler.retryRequest(L:91): retry error, curr request is null
08-16 10:06:50.199 31228-31228/com.**.**E/error: com.lidroid.xutils.exception.HttpException: java.io.IOException: Target host must not be null, or set in parameters. scheme=null, host=null, path=--java.io.IOException: Target host must not be null, or set in parameters. scheme=null, host=null, path=

Answer 1

Illegal character in path at index 68: http://**h//upload/5f534d87a3e148048b275ea5858f27f9[202]再试一下.doc

URIEncoder pasti boleh menyelesaikan pengecualian ini.
Jika pengarang masih mengalami ralat selepas pengekodan, sila semak mesej ralat dengan teliti. Contohnya, sama ada URL di atas benar-benar dikodkan sepenuhnya.

Answer 2

Aksara khas dalam URL perlu dilepaskan, seperti menggunakan URLEncoder

Answer 3

Perkara yang paling penting ialah beberapa ayat ini Jika anda masih mempunyai ralat semasa mengakses pada telefon bimbit, maka ia pada dasarnya adalah cache penyemak imbas mudah alih Anda boleh cuba mengikuti alamat dengan rentetan rawak dan menguji sekali lagi.

response.setHeader("Content-Type","application/octet-stream; charset=UTF-8");
String filepath = "/var/www/web/upload/5f534d87a3e148048b275ea5858f27f9[202]再试一下.doc";
File file = new File(filepath);
String filename = URLEncoder.encode(file.getName(), "utf-8");
response.setHeader("Content-Disposition", "attachment;filename=\"" + filename + "\"");