在转发来自Servlet的请求时添加新参数

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.IOException;

public class MyServlet extends HttpServlet {
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // 获取原始请求的参数
        String originalParam = request.getParameter("param");

        // 创建新的请求对象
        HttpServletRequestWrapper requestWrapper = new HttpServletRequestWrapper(request) {
            @Override
            public String getParameter(String name) {
                // 在新的请求对象中添加新参数
                if (name.equals("newParam")) {
                    return "newValue";
                }
                return super.getParameter(name);
            }
        };

        // 转发请求
        RequestDispatcher dispatcher = request.getRequestDispatcher("/targetServlet");
        dispatcher.forward(requestWrapper, response);
    }
}