Struts配置文件包和命名空间实战

以你之姓@ 2021-07-25 01:18 431阅读 0赞

**一 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"/>
        
        <package name="lee" extends="struts-default">
            
            <action name="login" class="org.crazyit.app.action.LoginAction">
                <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>
        
        <package name="book" extends="struts-default" namespace="/book">
            
            <action name="getBooks" class="org.crazyit.app.action.GetBooksAction">
                <result name="login">/WEB-INF/content/loginForm.jsp</result>
                <result>/WEB-INF/content/showBook.jsp</result>
            </action>
        </package>
    </struts>

**二 Action**

1 GetBooksAction

package org.crazyit.app.action;
    
    import com.opensymphony.xwork2.Action;
    import com.opensymphony.xwork2.ActionContext;
    
    import org.crazyit.app.service.*;
    
    
    public class GetBooksAction
        implements Action
    {
        private String[] books;
    
        public void setBooks(String[] books)
        {
            this.books = books;
        }
        public String[] getBooks()
        {
            return books;
        }
    
        public String execute() throws Exception
        {
            String user = (String)ActionContext.getContext()
                .getSession().get("user");
            if (user != null && user.equals("crazyit.org"))
            {
                BookService bs = new BookService();
                setBooks(bs.getLeeBooks());
                return SUCCESS;
            }
            return LOGIN;
        }
    }

2 LoginAction

package org.crazyit.app.action;
    
    import com.opensymphony.xwork2.*;
    
    
    public class LoginAction extends ActionSupport
    {
        private String username;
        private String password;
    
        // username的setter和getter方法
        public void setUsername(String username)
        {
            this.username = username;
        }
        public String getUsername()
        {
            return this.username;
        }
    
        // password的setter和getter方法
        public void setPassword(String password)
        {
            this.password = password;
        }
        public String getPassword()
        {
            return this.password;
        }
    
        public String execute() throws Exception
        {
            if (getUsername().equals("crazyit.org")
                    && getPassword().equals("leegang") )
            {
                ActionContext.getContext().getSession()
                    .put("user" , getUsername());
                return SUCCESS;
            }
            return ERROR;
        }
    
    }

**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>
    <s:form action="login">
        <s:textfield name="username" label="用户名"/>
        <s:textfield name="password" label="用户名"/>
        <s:submit value="登录"/>
    </s:form>
    </body>
    </html>

2 welcome.jsp

3 showBook.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>图书信息</title>
    </head>
    <body>
    <table border="1" width="360">
    <caption>图书信息</caption>
    <s:iterator value="books" status="index">
        <s:if test="#index.odd == true">
        <tr style="background-color:#cccccc">
        </s:if>
        <s:else>
        <tr>
        </s:else>
        <td>书名</td>
        <td><s:property/></td>
    </tr>
    </s:iterator>
    </table>
    </body>
    </html>

4 error.jsp

**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 2][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70]: /images/20210724/dcc5f4a085714934a243b4ce3e68c36b.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70 1]: /images/20210724/d3240d5898d94fdbbf5105107344e0ea.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70 2]: /images/20210724/d11a1689dc6f4131a1893f023e800cbe.png