在Spring boot应用程序中使用Filter修改ServletRequest

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

@WebFilter(urlPatterns = "/*")
public class CustomFilter implements Filter {

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        HttpServletRequest httpRequest = (HttpServletRequest) request;

        // 修改ServletRequest，例如修改请求参数
        String modifiedParam = httpRequest.getParameter("param") + "_modified";
        httpRequest.setAttribute("param", modifiedParam);

        // 添加自定义逻辑，例如添加请求头
        httpRequest.addHeader("Custom-Header", "Value");

        // 继续处理请求
        chain.doFilter(request, response);
    }

    // 其他方法，例如init和destroy方法，可以留空或不实现
}