Struts2.3 接收用户输入数据技术

Struts2中,支持直接使用领域对象获取用户输入的值,再也不用像Servlet中要Request.request.getparameter(" ");才能获取到;  Struts中的领域对象  ,ModelDriven ,action属性三种方式

 

           Struts中的领域对象;将类的属性写成一个User类,在Struts转发的页面会创建这个类,并创建set和

 get方法;代码下面已经实现    ; 代码下面已经实现

 

          action属性;与java bean的方式差不多    ;代码下面已经实现

 

          ModelDriven ;需要实现Action,ModelDriven接口,在实现的接口页面 手工穿件User的对象,不能创建Set和Get方法   ,实现getModel()方法     ;代码下面已经实现

 

1,Struts中的领域对象:

   a,登陆页面;

   

<form action="login" method="post">
登录页面:
    账号:<input type="text" name="user.username" />
    
 密码:<input type="password"  name="user.userpwd"/>
    <input type="submit" value="提交" />
   
</form>

 

   b,struts.cml配置文件

   

 <package name="default" namespace="/" extends="struts-default">
        <action name="hello" >
            <result >/login.html</result>
        </action>
    </package>
    
    <package name="main" extends="struts-default" >
      <action name="login" class="ActionDemo.ActionDemoSupport">
        <result name="hello">/1.jsp</result>
        <result name="hellow">/loginfail.html</result>
      </action>
    </package>

 

   c,User类

    

package ActionDemo;

import java.io.Serializable;
public class User implements Serializable{

	private String username;
	private String userpwd;

	public String getUsername() {
		return username;
	}

	public void setUsername(String username) {
		this.username = username;
	}

	public String getUserpwd() {
		return userpwd;
	}

	public void setUserpwd(String userpwd) {
		this.userpwd = userpwd;
	}
}

 

  d,Struts的转发类

   

public class ActionDemoSupport extends ActionSupport {
	//接收username和userpwd传过来的参数
	
	private User user;
	
	public User getUser() {
		return user;
	}


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


	@Override
	public String execute() throws Exception {
		if("scott".equals(user.getUsername())&&"tiger".equals(user.getUserpwd())){
			return "hello";
		}else{
		return "hellow";
		}
	}

 

e,jsp显示页面

  <%@ taglib prefix="s" uri="/struts-tags" %>

 

 欢迎:<s:property value="user.username" />登陆

 

2,ModelDriven操作领域对象

  a,登陆页面;

   

<form action="login" method="post">
登录页面:
    账号:<input type="text" name="username" />
    
 密码:<input type="password"  name="userpwd"/>
    <input type="submit" value="提交" />
   
</form>

 

    b,Struts,xml配置

   

 <package name="default" namespace="/" extends="struts-default">
        <action name="hello" >
            <result >/login.html</result>
        </action>
    </package>
    
    <package name="main" extends="struts-default" >
      <action name="login" class="ActionDemo.ActionDemoSupport">
        <result name="hello">/1.jsp</result>
        <result name="hellow">/loginfail.html</result>
      </action>
    </package>

 

  c, User类

   

public class User implements Serializable{

	private String username;
	private String userpwd;

	public String getUsername() {
		return username;
	}

	public void setUsername(String username) {
		this.username = username;
	}

	public String getUserpwd() {
		return userpwd;
	}

	public void setUserpwd(String userpwd) {
		this.userpwd = userpwd;
	}
}

 

d,使用ModelDriver接收用户数据

    

public class ActionDemoSupport implements Action,ModelDriven<User> {
	//ModelDriven接收用户输入必须要new ,action和领域对象接收用户输入是不需要创建对象的
	private User user =new User();

	@Override
	public User getModel() {
		// TODO Auto-generated method stub
		return user;
	}

	@Override
	public String execute() throws Exception {
		if ("scott".equals(user.getUsername()) && "tiger".equals(user.getUserpwd())) {
			return "hello";
		}
		return "hellow";
	}
	

 

e,jsp显示页面

<%@ taglib prefix="s" uri="/struts-tags" %>

 欢迎:<s:property value="username" />登陆

 

 

 

 

3,action属性操作接收用户输入

   a,登陆页面 ;

    

<form action="login" method="post">
登录页面:
    账号:<input type="text" name="username" />
    
 密码:<input type="password"  name="userpwd"/>
    <input type="submit" value="提交" />
   
</form>

 

   b,struts.xml配置

   

 <package name="default" namespace="/" extends="struts-default">
        <action name="hello" >
            <result >/login.html</result>
        </action>
    </package>
    
    <package name="main" extends="struts-default" >
      <action name="login" class="ActionDemo.ActionDemoSupport">
        <result name="hello">/loginsucc.html</result>
        <result name="hellow">/loginfail.html</result>
      </action>
    </package>

 

   c, struts的action转发类

      

package ActionDemo;

import com.opensymphony.xwork2.ActionSupport;

/**
 * 
 * @author Administrator Struts里面的转发类
 */
public class ActionDemoSupport extends ActionSupport {
	//接收username和userpwd传过来的参数
	private String username;
	private String userpwd;

	public String getUsername() {
		return username;
	}

	public void setUsername(String username) {
		this.username = username;
	}

	public String getUserpwd() {
		return userpwd;
	}

	public void setUserpwd(String userpwd) {
		this.userpwd = userpwd;
	}
   
	//转发的方法
	@Override
	public String execute() throws Exception {
		System.out.println(">"+username+"<>"+userpwd+"<");
		if ("scott".equals(username) && "tiger".equals(userpwd)) {
			return "hello";
		} else {
			return "hellow";
		}

	}
}