Java Filter过滤器的简单总结(二)
t.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class FilterTest implements Filter
{
@Override
public void destroy()
{
// TODO Auto-generated method stub
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException
{
// 转换成实例的请求和响应对象
HttpServletRequest req = (HttpServletRequest) request;
HttpServletResponse resp = (HttpServletResponse) response;
// 获取评论并屏蔽关键字
String str = req.getParameter("str");
str = str.replace("你妹呀", "***");
// 重新设置参数
req.setAttribute("str", str);
// 继续执行
chain.doFilter(request, response);
}
@Override
public void init(FilterConfig filterConfig) throws ServletException
{
// TODO Auto-generated method stub
}