AccessWebElements(jsp by&nb…

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JSP页面如何请求Action中的数据(通过Request,Session,

Application)？

Struts:

<result>/user_login_success.jsp</result>

</action>

</package>

Action(红色字体部分为常用方法):

import java.util.Map;

import org.apache.struts2.interceptor.ApplicationAware;

import org.apache.struts2.interceptor.RequestAware;

import org.apache.struts2.interceptor.SessionAware;

import com.opensymphony.xwork2.ActionContext;

import com.opensymphony.xwork2.ActionSupport;

public class LoginAction2 extends ActionSupport implements RequestAware,SessionAware, ApplicationAware {

private Map request;

private Map session;

private Map application;

//通过（DI dependency injection（控制反转）或 IoC inverse of control（依赖注入））

//初始化request，session，application。

public String execute() {

request.put("r1", "r1");

session.put("s1", "s1"); (一般情况下只使用这种方法。)

application.put("a1", "a1");

return SUCCESS;

}

@Override

public void setRequest(Map request) {

this.request = request;

}

@Override

public void setSession(Map session) {

this.session = session;

}

@Override

public void setApplication(Map application) {

this.application = application;

}

Jsp(index):

<body>

<br />

用户名：<input type="text" name="name"/>

密码：<input type="text" name="password"/>

<br />

</form>

</body>

Jsp(display):

<body>

User Login Success!

<br />

<s:property value="#request.r1"/> | <%=request.getAttribute("r1") %> <br />

<:property value="#session.s1"/>| <%=session.getAttribute("s1") %> <br />

<s:property value="#application.a1"/> | <%=application.getAttribute("a1") %> <br />

<s:property value="#attr.a1"/><br />

<s:property value="#attr.s1"/><br />

<s:property value="#attr.r1"/><br />

br />

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AccessWebElements(jsp&nbsp;by&amp;nb…

AccessWebElements(jsp by&nb…