编写2个Servlet,在第一个Servlet中使用setAttribute设置2个域数据后转发到第二个Servlet,在第二个Servlet中使用getAttribute取出域数据,使用response对象回传给客户端。这道题的xml文件怎么配置
时间: 2023-06-27 11:06:12 浏览: 87
在web.xml文件中配置这两个Servlet的映射关系,示例代码如下:
```xml
<web-app>
<servlet>
<servlet-name>Servlet1</servlet-name>
<servlet-class>com.example.Servlet1</servlet-class>
</servlet>
<servlet>
<servlet-name>Servlet2</servlet-name>
<servlet-class>com.example.Servlet2</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Servlet1</servlet-name>
<url-pattern>/servlet1</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>Servlet2</servlet-name>
<url-pattern>/servlet2</url-pattern>
</servlet-mapping>
</web-app>
```
在第一个Servlet中设置域数据并跳转到第二个Servlet:
```java
// Servlet1.java
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String data1 = "Hello";
String data2 = "World";
request.setAttribute("data1", data1);
request.setAttribute("data2", data2);
RequestDispatcher dispatcher = request.getRequestDispatcher("/servlet2");
dispatcher.forward(request, response);
}
```
在第二个Servlet中获取域数据并回传给客户端:
```java
// Servlet2.java
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String data1 = (String) request.getAttribute("data1");
String data2 = (String) request.getAttribute("data2");
response.setContentType("text/plain");
response.getWriter().write(data1 + " " + data2);
}
```
在这个示例中,当客户端访问/servlet1时,Servlet1会设置两个域数据并将请求转发到Servlet2。Servlet2再从请求中获取这两个域数据并将它们回传给客户端。
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