java background custom error page: (Recommended: java video tutorial)
404 often appears in java background projects Or 500 and other errors,
If no settings are made, the server will return a 404 or 500 error page by default
to display the error page to the front end.
After mastering the error page settings, you can customize the 404 or 500 error page according to business needs.
Implementation principle:
When the service throws a 404 or 500 exception, the
servlet service will check whether error is set in the web or xml -page and error-code
If the set page can be found, the set page will be returned to the front end. If the set page cannot be found, the system default page will be returned to the front end.
Implementation code:
404.html:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<div>
404
</div>
</body>
</html>500.html:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<div>
500
</div>
</body>
</html>web.xml:
<error-page> <error-code>404</error-code> <location>/404.html</location> </error-page> <error-page> <error-code>500</error-code> <location>/500.html</location> </error-page>
Implementation effect ：
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