问题遇到的现象和发生背景
问题相关代码,请勿粘贴截图
public class Servlet1 extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
super.doGet(req, resp);
String username = req.getParameter("username");
System.out.println("username为"+username);
req.setAttribute("Key","给你盖个章");
RequestDispatcher dispatcher = req.getRequestDispatcher("/servlet2");//寻找访问路径
dispatcher.forward(req,resp);
}
}
```java
public class Servlet2 extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
String username = req.getParameter("username");
System.out.println("username为"+username);
String key = req.getParameter("Key");
System.out.println("检查是否盖章"+key);
//执行自己的操作
System.out.println("执行自己的操作");
}
}
```java
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
version="4.0">
<servlet>
<servlet-name>HelloServlet</servlet-name>
<servlet-class>com.atguigu.HelloServlet</servlet-class>
<init-param>
<param-name>url</param-name>
<param-value>jinx</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>HelloServlet</servlet-name>
<url-pattern>/hello</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>Servlet1</servlet-name>
<servlet-class>com.atguigu.Servlet1</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Servlet1</servlet-name>
<url-pattern>/servlet1</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>Servlet2</servlet-name>
<servlet-class>com.atguigu.Servlet2</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Servlet2</servlet-name>
<url-pattern>/servlet2</url-pattern>
</servlet-mapping>
</web-app>
运行结果及报错内容
我的解答思路和尝试过的方法
我想要达到的结果