struts2 中获取参数_strus在getter中获取输入框的值-优快云博客

第一种，依赖容器获取：

                               private Map request;
    private Map session;
    private Map application;
    public ActionTest()
    {
        request=(Map)ActionContext.getContext().get("request");
        session=ActionContext.getContext().getSession();
        application=ActionContext.getContext().getApplication();
    }
private Map request;
private Map session;
private Map application;
public ActionTest()
{
  request=(Map)ActionContext.getContext().get("request");
  session=ActionContext.getContext().getSession();
  application=ActionContext.getContext().getApplication();
}

第二种，IoC方式，是通过依赖注入方式获取到对象，需要实现相应的接口为 RequestAware,SessionAware,ApplicationAware：

                               private Map<String,Object> request;
    private Map<String,Object> session;
    private Map<String,Object> application;

    public void setRequest(Map<String, Object> request) {
        this.request = request;
    }

    public void setSession(Map<String, Object> session) {
        this.session = session;
    }

    public void setApplication(Map<String, Object> application) {
        this.application = application;
    }
private Map<String,Object> request;
private Map<String,Object> session;
private Map<String,Object> application;

public void setRequest(Map<String, Object> request) {
  this.request = request;
}

public void setSession(Map<String, Object> session) {
this.session = session;
}

public void setApplication(Map<String, Object> application) {
this.application = application;
}

第三种，获取的是原型：

                               private HttpServletRequest request;
    private HttpSession session;
    private ServletContext application;

    public ActionTest()
    {
        request=ServletActionContext.getRequest();
        session=request.getSession();
        application=session.getServletContext();
    }
private HttpServletRequest request;
private HttpSession session;
private ServletContext application;

public ActionTest()
{
  request=ServletActionContext.getRequest();
  session=request.getSession();
  application=session.getServletContext();
}

第四种，通过IoC获取原型，需要实现ServletRequestAware，并且要实现setServletRequest方法：

                               private HttpServletRequest request;
    private HttpSession session;
    private ServletContext application;

    public void setServletRequest(HttpServletRequest request)
    {
        this.request=request;
        this.session=request.getSession();
        this.application=session.getServletContext();
    }
private HttpServletRequest request;
private HttpSession session;
private ServletContext application;

public void setServletRequest(HttpServletRequest request)
{
  this.request=request;
  this.session=request.getSession();
  this.application=session.getServletContext();
}