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Struts2.x基础

2016-05-30 14:04 483 查看

Struts2.x基础

导入包

修改 wb.xml

<span style="font-size:14px;"><?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <filter>
<filter-name>struts2</filter-name>
<filter-class>
org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app></span>

添加 Action

<span style="font-size:18px;">import java.util.Date;
import java.text.DateFormat;
public class HelloWorld {
private String message;
public String getMessage() { return message;  }
public String execute(){
message="Hello world, now is "+DateFormat.getInstance().format(new Date());
return "success";
}
}</span>

添加加 struts.xml 配置

<span style="font-size:14px;"><?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<package name="default" extends="struts-default" namespace="/">
<action name="hello" class="org.sf.action.HelloWorld">
<result>/hello.jsp</result>
</action>
</package>
</struts></span>

Hello.jsp 页面

<span style="font-size:18px;"><%@ page language="java" import="java.util.*" pageEncoding="gbk"%>
<%@ taglib uri="/struts-tags" prefix="s" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title> 显示结果</title>
</head>
<body>
<h2><s:property value="message"/></h2>
</body>
</html></span>

二：使用集成开发环境发开发 Struts2 版本的学生选课系统的登录功能
创建一个新的 Java Web 项目，ch25stucours 添加 struts2 应用支持

在项目上右击-->选择 MyEclipse-->选择 Add Struts Capabilities...，如图

点击后打开配置窗口，选择 Struts2.1-->点击“next”进入“选择库界面”选择要添加的库，这里采用默认值(只添加核心库)

点击“Finish”按钮，完成 Struts 应用支持的添加。

查看 Web.xml 文件

添加完成 struts2 应用能力支持后，MyEclipse 会自动配置好 web.xml，该文

件的内容如下，进行查看即可：

、

<span style="font-size:18px;"><?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<filter>
<filter-name>struts2</filter-name>
<filter-class>
org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app></span>

Action 类的创建

<span style="font-size:18px;">public class LoginAction {
private String uname;
private String upass;
public String getUname() {
return uname;
}
public void setUname(String uname) {
this.uname = uname;
}
public String getUpass() {
return upass;
}
public void setUpass(String upass) {
this.upass = upass;
}
public String execute() throws Exception{
if(uname.equals("sa") && upass.equals("sa")){
return "success";
}else{
return "fail";
}
}</span>
}

Struts.xml 配置

<span style="font-size:14px;"><?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration
2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>
<package name="myStruts" extends="struts-default" namespace="/">
<action name="login" class="org.sf.action.LoginAction">
<result name="success">/welcome.jsp</result>
<result name="error">/error.jsp</result>
</action>
</package>
</struts></span>

Login.jsp 页面
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<%@ page language="java" import="java.util.*" pageEncoding="gbk"%>

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

<span style="font-size:14px;"><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title> 登录页面</title>
</head>
<body>
<s:form action="login">
<s:textfield name="uname" label=" 用户名 "></s:textfield>
<s:password name="upass" label=" 密 码 "></s:password>
<s:submit value=" 提交 "/>
</s:form>
</body>
</html</span>

Welcome.jsp 页面

<%@ page language="java" import="java.util.*" pageEncoding="gbk"%>
<%@ taglib uri="/struts-tags" prefix="s" %>
j26Struts2.x 应用--Struts2.x 基础练习——计算机科学技术系：宋锋
8
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title> 欢迎页面</title>
</head>
<body>
<h2><s:text name=" 您 **** 好 "/></h2>
</body>
</html>

Error.jsp

<%@ page language="java" import="java.util.*" pageEncoding="gbk"%>
<%@ taglib uri="/struts-tags" prefix="s" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title><s:text name="errorPage"></s:text></title>
</head>
<body>
<s:text name=" 用户名或密码错误 "/>
</body>
</html>

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