Struts的Action的动态方法调用实战

小咪咪 2021-07-25 02:12 357阅读 0赞

**一 Action**

package org.crazyit.app.action;
    
    import com.opensymphony.xwork2.ActionSupport;
    import com.opensymphony.xwork2.ActionContext;
    
    
    public class LoginRegistAction
        extends ActionSupport
    {
        // 封装用户请求参数的两个成员变量
        private String username;
        private String password;
        // 封装处理结果的tip成员变量
        private String tip;
        // username对应的setter和getter方法
        public String getUsername()
        {
            return username;
        }
        public void setUsername(String username)
        {
            this.username = username;
        }
        // password对应的getter和setter方法
        public String getPassword()
        {
            return password;
        }
        public void setPassword(String password)
        {
            this.password = password;
        }
        // tip对应的setter和getter方法
        public String getTip()
        {
            return tip;
        }
        public void setTip(String tip)
        {
            this.tip = tip;
        }
        // Action包含的注册控制逻辑
        public String regist() throws Exception
        {
            ActionContext.getContext().getSession()
                .put("user" , getUsername());
            setTip("恭喜您," + getUsername() + ",您已经注册成功！");
            return SUCCESS;
        }
        // Action默认包含的控制逻辑
        public String execute() throws Exception
        {
            if (getUsername().equals("crazyit.org")
                && getPassword().equals("leegang") )
            {
                ActionContext.getContext().getSession()
                    .put("user" , getUsername());
                setTip("欢迎," + getUsername() + ",您已经登录成功！");
                return SUCCESS;
            }
            return ERROR;
        }
    }

**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>
        <constant name="struts.devMode" value="true"/>
        <constant name="struts.enable.DynamicMethodInvocation" value="true"/>
        <package name="lee" extends="struts-default">
            <action name="login" class="org.crazyit.app.action.LoginRegistAction">
                <result name="error">/WEB-INF/content/error.jsp</result>
                <result>/WEB-INF/content/welcome.jsp</result>        
            </action>
            <action name="*">
                <result>/WEB-INF/content/{1}.jsp</result>        
            </action>
        </package>
    </struts>

**三 视图**

1 loginForm.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>登录页面</title>
    </head>
    <body>
    <table width="300" align="center">
    <form action="login" method="post">
        <tr>
            <td>用户名:</td>
            <td><input type="text" name="username"/></td>
        </tr>
        <tr>
            <td>密  码:</td>
            <td><input type="text" name="password"/></td>
        </tr>
        <tr>
            <td><input type="submit" value="登录"
                onclick="this.form.action='login';"/></td>
            <td><input type="submit" value="注册"
                onclick="regist();"/></td>
        </tr>
    </form>
    <table>
    <script type="text/javascript">
    function regist()
    {
        // 获取页面的第一个表单
        targetForm = document.forms[0];
        // 动态修改表单的action属性
        targetForm.action = "login!regist";
    }
    </script>
    </body>
    </html>

2 welcome.jsp

3 error.jsp

<%@ page contentType="text/html; charset=GBK" language="java" errorPage="" %>
    <!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>错误页面</title>
    </head>
    <body>
        对不起，您登录失败！
    </body>
    </html>

**四 测试**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70 1][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70]: /images/20210724/ba9b88c7d27e4dbd8da94f20b17e7f21.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70 1]: /images/20210724/1e1864d5968144e28b9fb470fbb3f22f.png