HttpServletRequestWrapper结合过滤器实现参数自动填充

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import java.util.HashMap;
import java.util.Map;

public class RequestParamWrapper extends HttpServletRequestWrapper {
   

	private Map<String , String[]> params = new HashMap<String, String[]>();
    private String token = "";
	
	public RequestParamWrapper(HttpServletRequest request) {
   
		super