正在尝试确保两个密码字段具有相同的值，并且不是空白的Java脚本

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@WebServlet("/validatePassword")
public class PasswordValidationServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        String password1 = request.getParameter("password1");
        String password2 = request.getParameter("password2");

        if (password1 == null || password1.isEmpty() || password2 == null || password2.isEmpty()) {
            response.getWriter().println("密码不能为空");
            return;
        }

        if (!password1.equals(password2)) {
            response.getWriter().println("两个密码不匹配");
            return;
        }

        response.getWriter().println("密码验证通过");
    }
}