Struts2中Action取得表单数据的几种方法

 

Struts2中Action获得表单数据的几种方法

struts2 Action获取表单传值

1.通过属性驱动式

JSP:

Action:直接通过get、set方法获取。

public class sysAction extends ActionSupport{    private String username;    public String login() throws Exception {        System.out.println(username);        return SUCCESS;    }    public String getUsername() {        return username;    }    public void setUsername(String username) {        this.username= username;    }}

 

2.模型驱动方式，必须要实现ModelDriven<T>接口。对于要传入多个model第二种方式不方便

JSP:

Action:必须实现getModel() 方法

public class sysAction extends ActionSupport implements ModelDriven
      
       {    private User user;    public String login() throws Exception {        System.out.println(getModel().getUsername());        return SUCCESS;    }    public User getModel() {        if (null == user) {            return user = new User();        }            return user;    }}
      

 

3.第三种方式可以完全不实现ModelDriven<T>，也可使用多个model对象的属性。

JSP:

 

Action: 必须提供set方法

public class sysAction extends ActionSupport{
     　　 //using spring ioc or new manually　    private User user=new User();    private Teacher teacher=new Teacher();    public String login() throws Exception {        System.out.println(user.getUsername());        System.out.println(teacher.getLevel());        return SUCCESS;    }    public void setUser(User user) {        this.user = user;    }        public void setTeacher(Teacher teacher) {        this.teacher = teacher;    }}