import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
public class EncodingFilter implements Filter
{
String encoding = null;
FilterConfig filterConfig = null;
public void init(FilterConfig filterConfig) throws ServletException
{
this.filterConfig = filterConfig;
this.encoding = filterConfig.getInitParameter("encoding");
}
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException
{
if (encoding != null)
{
request.setCharacterEncoding(encoding);
}
chain.doFilter(request, response);
}
public void destroy()
{
this.encoding = null;
this.filterConfig = null;
}
}
<!-- web.xml设置-->
<filter>
<filter-name>encodingFilter</filter-name>
<filter-class>com.dkflow.filter.EncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>gb2312</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<servlet-name>action</servlet-name>
</filter-mapping>
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