Question

我正在尝试将Java类转换为在网页上显示。使用最高回答here作为指导。如果我使用System.out打印出来的东西，Java会做它应该做的事情。当尝试转发到jsp页面时，它会循环（重新实例化？），并且不会停止（必须手动终止进程）。

Connector.java

public class Connector extends HttpServlet {
    private static URL url = https://my.server.com/WEB-INF/ws/service.php?wsdl");;
    private static final String USERNAME = "JoeBoB";
    private static final String PASSWORD = "1337pass";

    public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {


        //login to my.server.com
        try {
          authToken = serverAPI.login(USERNAME, PASSWORD);
          System.out.println("Logged into server with Token: " + authToken);
          //this shows up in console over and over again, until manually killed
        }
        catch (Exception ex) {
          ex.printStackTrace();
        }

        request.setAttribute("message","bacon");

        request.getRequestDispatcher("/WEB-INF/draw.jsp").forward(request, response);
        //line above appears to be the one that re-inits the class. 
        //commenting this out stops the looping
        //but also prevents the data from showing on the webpage
        serverAPI.logout(authToken);

WEB-INF / draw.jsp

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
    <head>
        <title>This is my drawn page</title>
    </head>
    <body>
        ${message}
    </body>
</html>

WEB-INF / web.xml中

<web-app>
  <display-name>Connector</display-name>

  <servlet>
        <servlet-name>Connector</servlet-name>
        <servlet-class>com.company.package.Connector</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>Connector</servlet-name>
        <url-pattern>/*</url-pattern>
    </servlet-mapping>
</web-app>

我感觉这有点简单（我忘了配置或配置错误），但是对于我的生活无法弄清楚是什么。

Answer 1

通过将/ *映射到您的servlet，您将覆盖JSP请求的默认处理程序。您需要使用更具体的模式，使用文件扩展名或子目录。

转发到jsp时Java Servlet循环

1 个答案: