struts2 Action擷取表單資料

1.通過屬性驅動式  

 

      <form action="sys/login.action" method="post">          <input type="text" name="username">          <input type="submit" value="submit">      </form>

Action:直接通過get、set方法擷取。

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.模型驅動方式，必須要實現ModelDriven<T>介面。對於要傳入多個model第二種方式不方便  

    <form action="sys/login.action" method="post">          <input type="text" name="username">          <input type="submit" value="submit">      </form>        

 

Action:必須實現getModel() 方法

 

public class sysAction extends ActionSupport implements ModelDriven<User>{      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.第三種方式可以完全不實現ModelDriven<T>，也可使用多個model對象的屬性。

 

    <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: 必須提供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;      }  }