Deprecated List (Servlet 4.0 API Documentation - Apache Tomcat 9.0.37)

# Deprecated API

## Contents

- Deprecated Interfaces
- Deprecated Classes
- Deprecated Methods
- Deprecated Constructors

- Deprecated Interfaces
  Interface and Description
  javax.servlet.http.HttpSessionContext As of Java(tm) Servlet API 2.1 for security reasons, with no replacement. This interface will be removed in a future version of this API.
  javax.servlet.SingleThreadModel As of Java Servlet API 2.4, with no direct replacement.

- Deprecated Classes
  Class and Description
  javax.servlet.http.HttpUtils As of Java(tm) Servlet API 2.3. These methods were only useful with the default encoding and have been moved to the request interfaces.

- Deprecated Methods
  Method and Description
  javax.servlet.http.HttpServletResponseWrapper.encodeRedirectUrl(String) As of Version 3.0 of the Java Servlet API
  javax.servlet.http.HttpServletResponse.encodeRedirectUrl(String) As of version 2.1, use encodeRedirectURL(String url) instead
  javax.servlet.http.HttpServletResponseWrapper.encodeUrl(String) As of Version 3.0 of the Java Servlet API
  javax.servlet.http.HttpServletResponse.encodeUrl(String) As of version 2.1, use encodeURL(String url) instead
  javax.servlet.http.HttpSessionContext.getIds() As of Java Servlet API 2.1 with no replacement. This method must return an empty `Enumeration` and will be removed in a future version of this API.
  javax.servlet.ServletRequestWrapper.getRealPath(String) As of Version 3.0 of the Java Servlet API
  javax.servlet.ServletRequest.getRealPath(String) As of Version 2.1 of the Java Servlet API, use `ServletContext.getRealPath(java.lang.String)` instead.
  javax.servlet.UnavailableException.getServlet() As of Java Servlet API 2.2, with no replacement.
  javax.servlet.ServletContext.getServlet(String) As of Java Servlet API 2.1, with no direct replacement.
  javax.servlet.ServletContext.getServletNames() As of Java Servlet API 2.1, with no replacement.
  javax.servlet.ServletContext.getServlets() As of Java Servlet API 2.0, with no replacement.
  javax.servlet.http.HttpSessionContext.getSession(String) As of Java Servlet API 2.1 with no replacement. This method must return null and will be removed in a future version of this API.
  javax.servlet.http.HttpSession.getSessionContext() As of Version 2.1, this method is deprecated and has no replacement. It will be removed in a future version of the Java Servlet API.
  javax.servlet.http.HttpSession.getValue(String) As of Version 2.2, this method is replaced by `HttpSession.getAttribute(java.lang.String)`.
  javax.servlet.http.HttpSession.getValueNames() As of Version 2.2, this method is replaced by `HttpSession.getAttributeNames()`
  javax.servlet.http.HttpServletRequestWrapper.isRequestedSessionIdFromUrl() As of Version 3.0 of the Java Servlet API
  javax.servlet.http.HttpServletRequest.isRequestedSessionIdFromUrl() As of Version 2.1 of the Java Servlet API, use `HttpServletRequest.isRequestedSessionIdFromURL()` instead.
  javax.servlet.ServletContext.log(Exception, String) As of Java Servlet API 2.1, use `ServletContext.log(String message, Throwable throwable)` instead. This method was originally defined to write an exception's stack trace and an explanatory error message to the servlet log file.
  javax.servlet.http.HttpSession.putValue(String, Object) As of Version 2.2, this method is replaced by `HttpSession.setAttribute(java.lang.String, java.lang.Object)`
  javax.servlet.http.HttpSession.removeValue(String) As of Version 2.2, this method is replaced by `HttpSession.removeAttribute(java.lang.String)`
  javax.servlet.http.HttpServletResponseWrapper.setStatus(int, String) As of Version 3.0 of the Java Servlet API
  javax.servlet.http.HttpServletResponse.setStatus(int, String) As of version 2.1, due to ambiguous meaning of the message parameter. To set a status code use `setStatus(int)`, to send an error with a description use `sendError(int, String)`.

- Deprecated Constructors
  Constructor and Description
  javax.servlet.UnavailableException(int, Servlet, String) As of Java Servlet API 2.2, use `UnavailableException.UnavailableException(String, int)` instead.
  javax.servlet.UnavailableException(Servlet, String) As of Java Servlet API 2.2, use `UnavailableException.UnavailableException(String)` instead.

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