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";
}
}
}