How do I throw a 404 error from within a java servlet? My web.xml already specifies what page to show when there is a 404, how do I throw a 404 from within a servlet?
如何在java servlet中抛出404错误?我的网络。xml已经指定在有404页面时要显示什么页面，如何从servlet中抛出404 ?
2 个解决方案
#1
110
The Servlet API gives you a method to send a 404 or any other HTTP status code. It's the sendError method of HttpServletResponse:
Servlet API为您提供了发送404或任何其他HTTP状态代码的方法。是httpletservresponse的sendError方法:
public void doGet(HttpServletRequest request, HttpServletResponse response) {
response.sendError(HttpServletResponse.SC_NOT_FOUND);
}
#2
5
In your doGet or doPost method you have a parameter HttpServletResponse res
在doGet或doPost方法中，您有一个参数HttpServletResponse res
404 is a status code which can be set by:
404是一种状态代码，可以通过以下方式设置:
res.setStatus(HttpServletResponse.SC_NOT_FOUND);
#1
110
The Servlet API gives you a method to send a 404 or any other HTTP status code. It's the sendError method of HttpServletResponse:
Servlet API为您提供了发送404或任何其他HTTP状态代码的方法。是httpletservresponse的sendError方法:
public void doGet(HttpServletRequest request, HttpServletResponse response) {
response.sendError(HttpServletResponse.SC_NOT_FOUND);
}
#2
5
In your doGet or doPost method you have a parameter HttpServletResponse res
在doGet或doPost方法中，您有一个参数HttpServletResponse res
404 is a status code which can be set by:
404是一种状态代码，可以通过以下方式设置:
res.setStatus(HttpServletResponse.SC_NOT_FOUND);