1. servlet拋出錯誤代碼異常，如404

public void doGet(HttpServletRequest request, HttpServletResponse response) {response.sendError(HttpServletResponse.SC_NOT_FOUND); }

2. filter拋出錯誤代碼異常

public void doFilter(ServletRequest request, ServletResponse response,FilterChain chain) throws IOException, ServletException {HttpServletRequest httpRequest=(HttpServletRequest)request;HttpServletResponse httpResponse=(HttpServletResponse)response;httpResponse.sendError(HttpServletResponse.SC_UNAUTHORIZED);

}

?

轉載于:https://www.cnblogs.com/davidwang456/p/4511024.html

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