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 definitelycan solve this exception.
If you still encounter errors after coding, please check the error message carefully. For example, whether the URL above is really fully encoded.

Answer 2

Special characters in the URL need to be escaped, such as using URLEncoder

Answer 3

The most important thing is these few sentences. If you still have an error when accessing on mobile phone, then it is basically the cache of the mobile browser. You can try to follow the address with a random string and test again.

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 + "\"");