struts2 Action获取表单传值（属性，类)）

1.通过属性驱动式   
JSP:   
    <form action="sys/login.action" method="post">   
        <input type="text" name="username">   
        <input type="submit" value="submit">   
    </form>   
       
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.第二种方式类获取

JSP:   
    <form action="sys/login.action" method="post">   
        <input type="text" name="user.username">   
        <input type="text" name="teacher.level">   
        <input type="submit" value="submit">   
    </form>   
       
Action: 必须提供set方法   

public class sysAction extends ActionSupport{
    private User user;
    private Teacher 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;
    }
}