Question

Struts2中JAVA页面request获取Web元素值为空？

public class T1 extends ActionSupport {
private Map request;
public T1() {
request = (Map) ActionContext.getContext().get("request");
}
public String good() {
System.out.println(request.get("name"));
return "success";
}
}

System.out.println(request.get("name"));输出怎么是空的

Answer 1

public class T1 extends ActionSupport {
private HttpServletRequest request;
public T1() {
request = ActionContext.getRequest();
}
public String good() {
System.out.println(request.get("name"));
return "success";
}
}

这样看看

Answer 2

我晕有request怎么写到括号里去了直接有getRequest()方法好不好。。。

Answer 3

request获取方式不对

Answer 4

用ServletContext.getRequest()去获得request