qq_何足道_1
2017-12-23 10:49
代码如下
```
public class FirstListener implements ServletRequestListener {
// Public constructor is required by servlet spec
public FirstListener() {
}
@Override
public void requestDestroyed(ServletRequestEvent servletRequestEvent) {
System.out.println("request destroyed initParam=" + servletRequestEvent.getServletContext().getAttribute("initParam"));
}
@Override
public void requestInitialized(ServletRequestEvent servletRequestEvent) {
servletRequestEvent.getServletContext().setAttribute("intiParam","yang");
System.out.println("request initialized");
}
}
```
运行结果
```
Connected to server
[2017-12-23 10:44:47,157] Artifact ListenerDemo:war exploded: Artifact is being deployed, please wait...
[2017-12-23 10:44:47,776] Artifact ListenerDemo:war exploded: Artifact is deployed successfully
[2017-12-23 10:44:47,776] Artifact ListenerDemo:war exploded: Deploy took 619 milliseconds
request initialized
request destroyed initParam=null
request initialized
request destroyed initParam=null
request initialized
request destroyed initParam=null
```
额,代码竟然不显示
我再贴一下
public class FirstListener implements ServletRequestListener { // Public constructor is required by servlet spec public FirstListener() { } @Override public void requestDestroyed(ServletRequestEvent servletRequestEvent) { System.out.println("request destroyed initParam=" + servletRequestEvent.getServletContext().getAttribute("initParam")); } @Override public void requestInitialized(ServletRequestEvent servletRequestEvent) { servletRequestEvent.getServletContext().setAttribute("intiParam","yang"); System.out.println("request initialized"); } }
JAVA Web开发技术应用——监听器
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