Struts2学习3——数据绑定及获取Session

接收表单参数

1. 在Action中定义表单属性

<form action="login" method="post" name="form">
User：<s:textfield name="username"/><br/>
Password：<s:password name="password"/><br/>
<s:submit value="提交"/> 
</form>

在Action中定义

private String username;
    private String password;
    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;
    }

2. 表单参数封装成类

<form action="login" method="post" name="form"> 
User：<s:textfield name="user.username"/><br/>
Password：<s:password name=" user.password"/><br/>
<s:submit value="提交"/> 
</form>

Model类

public class test {
    private String username;
    private String password;
    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;
    }

}

在Action中定义Model对象

private User user;
public getUser(){
   return user;
}
public void setUser(User user){
   this.user=user;
}

3. 实现ModelDriven接口

表单及Model、Action中User定义与上面相同，对Action类：

public class loginAction extends ActionSupport implements ModelDriven<User>{
   User user=new User();
   ...
   public Users getModel()
   {
      return user;
   }
}

在View显示Action中的变量

在Action定义

private String username;
    private String password;
    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;
    }

然后在jsp中，

<%@ taglib prefix="s" uri="/struts-tags" %>
 <s:property value="username" />
 或

String username = (String) request.getAttribute("username");

获取Session

方法1

在前一篇文章已有介绍，这里简要再记录一下

private RbacAdmins rbacAdmin;

    public RbacAdmins getRbacAdmin() {
        return rbacAdmin;
    }

    public void setRbacAdmin(RbacAdmins rbacAdmin) {
        this.rbacAdmin = rbacAdmin;
    }
    @Override
    public String execute() throws Exception {
        ActionContext actionContext = ActionContext.getContext();
        Map session = actionContext.getSession();
        rbacAdmin =(RbacAdmins)session.get(Session.ADMIN);      
        return "APP";
    }

方法2(代码未测试)

import java.util.Map;
    import org.apache.struts2.interceptor.SessionAware;
    import com.opensymphony.xwork2.ActionSupport;

    public class SessionTest1Action extends ActionSupport implements SessionAware {
    private Map session;
    public void setSession（Map session） {
        this.session = session;
    }

    public String execute（） {
        this.session.put（"USER_NAME", "Test User 1"）；
        return SUCCESS;
    }
}