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package tools;
import javax.servlet.http.HttpServlet;
import javax.servlet.Filter;
import javax.servlet.FilterConfig;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.FilterChain;
public class EncodingFilter extends HttpServlet implements Filter
{
private FilterConfig config = null;
private String targetEncoding = "GBK";
public void init(FilterConfig filterConfig)
{
this.config = filterConfig;
this.targetEncoding = config.getInitParameter("encoding");
}
public void destroy()
{
config = null;
targetEncoding = null;
}
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse,
FilterChain filterChain)
{
ServletRequest request = (ServletRequest) servletRequest;
try
{
request.setCharacterEncoding(targetEncoding);
filterChain.doFilter(servletRequest, servletResponse);
}
catch (Exception ex)
{
ex.printStackTrace();
}
}
}
<filter>
<filter-name>EncodingFilter</filter-name>
<filter-class>db.EncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>GBK</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>EncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>