strust中Action类和ActionForm类的基本用法

  这里用一个最简单的登录页面演示，一个LoginForm，一个LoginAction。

  LoginForm如下：

--------------------------------------------------------------------

  package cn.itcast;

  import org.apache.struts.action.ActionForm;


public class LoginForm extends ActionForm {


/**
* 
*/
private static final long serialVersionUID = 8854535717875180957L;


private String username = null;
private String password = null;

public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}


}

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  LoginAction如下：

-----------------------------------------------------------------------------

package cn.itcast;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;


public class LoginAction extends Action {


@Override
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
LoginForm loginForm = (LoginForm)form;

if(loginForm.getUsername().equals("itcast")){
return mapping.findForward("LoginSuccess");
}else {
return mapping.findForward("LoginFailure");
}
}

}

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  我们需要将LoginForm和LoginAction在strust-config.xml中管理起来，在这个文件中添加如下代码：

   <form-beans>
     <form-bean name="loginForm" type="cn.itcast.LoginForm"></form-bean>
    </form-beans>

  

   <action-mappings>
        <action path="/login" name="loginForm" type="cn.itcast.LoginAction">
           <forward name="LoginSuccess" path="/LoginSuccess.jsp"></forward>
           <forward name="LoginFailure" path="/LoginFailure.jsp"></forward>
        </action>
    </action-mappings>

其中，LoginAction类是负责登录操作用的，LoginForm是自动获取表单内容的。