import java.io.IOException; import java.io.PrintWriter; import jakarta.servlet.ServletException; import jakarta.servlet.annotation.WebServlet; import jakarta.servlet.http.HttpServlet; import jakarta.servlet.http.HttpServletRequest; import jakarta.servlet.http.HttpServletResponse; @WebServlet("/QueryStringTest") public class QueryStringTest extends HttpServlet { private static final long serialVersionUID = 1L; @Override protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType( "text/html; charset=UTF-8"); PrintWriter out = response.getWriter(); out.println(""); String qs = request.getQueryString(); out.printf("QueryString は　%s です。%n", qs); out.println(""); out.close(); } }