属性驱动:(靠的是ParameterInterceptor拦截器,setValue方法操作值桟属性)

*  在action中设置属性,属性的名称和页面上表单中的name属性的名称保持一致

*  在action中的属性,必须有set和get方法

*  好处: 这样设计可以保证action与servlet容器松耦合

* 如果属性驱动和模型驱动属性名重复,只有模型驱动能取到值,属性驱动为null


属性驱动原理图:



例子:

表单页面

<body>
  <s:form action="testParameterInterceptor_Login">
  	帐号<s:textfield name="userName"/><br>
  	密码<s:password name="passWord"/><br>
  	<s:submit value="提交"/>
  </s:form>
</body>

Action

public class TestParameterInterceptorAction extends ActionSupport {
	private String userName;
	private String passWord;

	public String execute() throws Exception {
		return SUCCESS;
	}
	
	public String Login() throws Exception {
		System.out.println("userName--->"+userName);
		System.out.println("passWord--->"+passWord);
		return 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;
	}

}




模型驱动:

*  如果在页面上的表单中,表单的内容很多,这个时候就会在action中写很多属性和属性的set,get方法,这样写代码结构不好

*  采用javabean

*  让该action实现ModelDriver


模型驱动原理图:



例子:

javaBean

public class User {
	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;
	}

}

表单页面

<body>
  <s:form action="testModelDrivenInterceptor_Login">
  	帐号<s:textfield name="userName"/><br>
  	密码<s:password name="passWord"/><br>
  	<s:submit value="提交"/>
  </s:form>
</body>

Action

/**
 *  要用模型驱动拦截器,就需要实现ModelDriven接口,覆写getModel()
 */
public class TestmodelDrivenInterceptorAction extends ActionSupport implements ModelDriven<User>{
	private User user = new User();
	
	public String execute() throws Exception {
		return SUCCESS;
	}
	
	public String Login() throws Exception {
		System.out.println(user.getUserName());
		System.out.println(user.getPassWord());
		return null;
	}
	
	public User getModel() {
		return this.user;
	}

	public User getUser() {
		return user;
	}

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


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