[Java] Create a filter

package tool;

import java.io.IOException;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;

@WebFilter(urlPatterns = { "/*" })
public class EncodingFilter implements Filter {
	public void doFilter(
		ServletRequest request,
		ServletResponse response,
		FilterChain chain
	) throws IOException, ServletException {
		request.setCharacterEncoding("UTF-8");
		response.setContentType("text/html; charset=UTF-8");

		System.out.println("Before filtering");

		chain.doFilter(request, response);

		System.out.println("After filtering");

	}

	public void init(FilterConfig filterconfig) {}

	public void destory() {
	}
}

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