Struts基于对象的类型转换-蒲公英云

Struts基于对象的类型转换

一视图

1 input.jsp

<%@ page contentType="text/html; charset=GBK" language="java" errorPage="" %>
<%@taglib prefix="s" uri="/struts-tags"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title>利用OGNL的进行类型转换</title>
</head>
<body>
<h3>利用OGNL的进行类型转换</h3>
<s:form action="login">
    <!-- 该表单域封装的请求参数名为user.name -->
    <s:textfield name="user.name" label="用户名"/>
    <!-- 该表单域封装的请求参数名为user.pass -->
    <s:textfield name="user.pass" label="密码"/>
    <tr>
        <td colspan="2"><s:submit value="转换" theme="simple"/>
        <s:reset value="重填" theme="simple"/></td>
    </tr>
</s:form>
</body>
</html>

2 welcome.jsp

<%@ page contentType="text/html; charset=GBK" language="java" errorPage="" %>
<%@taglib prefix="s" uri="/struts-tags"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title>转换结果</title>
</head>
<body>
    <s:actionmessage/>
    用户名为:<s:property value="user.name"/><br/>
    密码为：<s:property value="user.pass"/><br/>
</body>
</html>

二配置文件

<?xml version="1.0" encoding="GBK"?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
    "http://struts.apache.org/dtds/struts-2.3.dtd">
<struts>
    <package name="lee" extends="struts-default">
        <action name="login" class="org.crazyit.app.action.LoginAction">
            <result>/WEB-INF/content/welcome.jsp</result>
            <result name="error">/WEB-INF/content/welcome.jsp</result>
        </action>
        <action name="*">
            <result>/WEB-INF/content/{1}.jsp</result>        
        </action>
    </package>
</struts>

三领域类

package org.crazyit.app.domain;
public class User
{
    private String name;
    private String pass;
    // name的setter和getter方法
    public void setName(String name)
    {
        this.name = name;
    }
    public String getName()
    {
        return this.name;
    }
    // pass的setter和getter方法
    public void setPass(String pass)
    {
        this.pass = pass;
    }
    public String getPass()
    {
        return this.pass;
    }
}

四 action

package org.crazyit.app.action;
import com.opensymphony.xwork2.ActionSupport;
import org.crazyit.app.domain.*;
public class LoginAction extends ActionSupport
{
    // 使用User类型的成员变量封装请求参数
    private User user;
    private String tip;
    // user的setter和getter方法
    public void setUser(User user)
    {
        this.user = user;
    }
    public User getUser()
    {
        return this.user;
    }
    public String execute() throws Exception
    {
        // 通过user的name属性和pass属性来判断控制逻辑
        if (getUser().getName().equals("crazyit.org")
            && getUser().getPass().equals("leegang") )
        {
            addActionMessage("登录成功");
            return SUCCESS;
        }
        addActionMessage("登录失败！！");
        return ERROR;
    }
}