action向jsp页面传递数据的方法
action向jsp页面传递数据的方法
关键字: struts, request
action向jsp页面传递数据的几种方法:
前提:在struts的配置文件struts-config.xml中,设置该action的scope属性为“request”,即:
Xml代码
<struts-config>
<form-beans>
<form-bean name="loginForm" type="com.bjsxt.struts.LoginActionForm"/>
</form-beans>
<action-mappings>
<action path="/login"
type="com.bjsxt.struts.LoginAction"
name="loginForm"
scope="request"
>
<forward name="success" path="/login_success.jsp"/>
<forward name="error" path="/login_error.jsp"/>
</action>
</action-mappings>
</struts-config>
<struts-config>
<form-beans>
<form-bean name="loginForm" type="com.bjsxt.struts.LoginActionForm"/>
</form-beans>
<action-mappings>
<action path="/login"
type="com.bjsxt.struts.LoginAction"
name="loginForm"
scope="request"
>
<forward name="success" path="/login_success.jsp"/>
<forward name="error" path="/login_error.jsp"/>
</action>
</action-mappings>
</struts-config> 注意:所有struts-config.xml中的path属性都是以"/"开头的。
方法一:在action中利用request对象的setAttribute方法来传递数据
Java代码
package com.bjsxt.struts;
/**
* 用户登录的Action
*/
public class LoginAction extends Action {
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
LoginActionForm laf = (LoginActionForm)form;
String username = laf.getUsername();
String password = laf.getPassword();
String errorInfo = "";
try {
UserManager.getInstance().login(username, password);
//request.setAttribute("username", username);
return mapping.findForward("success");
}catch(UserNotFoundException unfe) {
unfe.printStackTrace();
&nbs