java的filter如何实现utf-8编码转换

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;

@WebFilter("/*")
public class EncodingFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest)servletRequest;
        String uri = request.getRequestURI();
        // 可以跳过某些链接
        if(uri == null || !uri.contains("ueditor1.4.3")) {
            //解决中文乱码问题
            servletRequest.setCharacterEncoding("utf-8");
            servletResponse.setContentType("text/html;charset=UTF-8");
        }
        filterChain.doFilter(servletRequest,servletResponse);//为了让程序继续运行，需要添加这句话，否则就会终止
    }

    @Override
    public void destroy() {

    }
}