public class SetCharacterEncodingFilter
extends java.lang.Object
implements javax.servlet.Filter
Example filter that sets the character encoding to be used in parsing the incoming request, either unconditionally or only if the client did not specify a character encoding. Configuration of this filter is based on the following initialization parameters:
ignore
initialization parameter. This parameter
is required, so there is no default.selectEncoding()
method is set. If set to "false,
selectEncoding()
is called only if the
client has not already specified an encoding. By default, this
parameter is set to "true".Although this filter can be used unchanged, it is also easy to
subclass it and make the selectEncoding()
method more
intelligent about what encoding to choose, based on characteristics of
the incoming request (such as the values of the Accept-Language
and User-Agent
headers, or a value stashed in the current
user's session.
Constructor and Description |
---|
SetCharacterEncodingFilter() |
Modifier and Type | Method and Description |
---|---|
void |
destroy()
Take this filter out of service.
|
void |
doFilter(javax.servlet.ServletRequest request,
javax.servlet.ServletResponse response,
javax.servlet.FilterChain chain)
Select and set (if specified) the character encoding to be used to
interpret request parameters for this request.
|
void |
init(javax.servlet.FilterConfig filterConfig)
Place this filter into service.
|
public void destroy()
destroy
in interface javax.servlet.Filter
public void doFilter(javax.servlet.ServletRequest request, javax.servlet.ServletResponse response, javax.servlet.FilterChain chain) throws java.io.IOException, javax.servlet.ServletException
doFilter
in interface javax.servlet.Filter
request
- The servlet request we are processingresult
- The servlet response we are creatingchain
- The filter chain we are processingjava.io.IOException
- if an input/output error occursjavax.servlet.ServletException
- if a servlet error occurspublic void init(javax.servlet.FilterConfig filterConfig) throws javax.servlet.ServletException
init
in interface javax.servlet.Filter
filterConfig
- The filter configuration objectjavax.servlet.ServletException