struts2入门（登陆实例）
2015-09-04 20:30
543 查看
做了一个登陆程序作为入门例子。登陆会去交互，并返回页面，比较适合以后扩展的项目，容易理解！
例子：登陆的Struts2案例
环境：
IDE工具：Myeclipse , Tomcat6.0
所需jar包：
struts2-core-2.1.8.1.jar
struts2-json-plugin-2.1.8.1.jar
xwork-core-2.1.6.jar
commons-fileupload-1.2.1.jar
freemarker-2.3.15.jar
junit4.4.jar
ognl-2.6.7.jar
步骤:
1. 创建一个web project项目
2.导入Struts2所需jar包
3.配置web.xml
4.配置struts2.xml
5.写action类(LoginUser.java)
6.写jsp页面
7.启动tomcat.运行项目
项目最后截图：
开始：
1.创建一个项目
还是截图，项目名称为：Struts2SpExa
2.导入所需jar包
导入所需jar包到项目的lib文件夹下(或者通过Build Path导入也可)
3.在WEB-INF下面的web.xml中配置：
配置拦截器和起始页面
[html] view
plaincopyprint?
<?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>/WEB-INF/jsp/login.jsp</welcome-file>
</welcome-file-list>
</web-app>
4.配置struts.xml
配置strust2要调用的action
[html] view
plaincopyprint?
<?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">
<!--配置struts action>
<struts>
<package name="todayMZ" extends="struts-default" namespace="/">
<action name="loginUser" class="todayMZ.user.action.UserAction">
<result name="success">/WEB-INF/jsp/success.jsp</result>
<result name="fail">/WEB-INF/jsp/fail.jsp</result>
</action>
</package>
</struts>
5.写action类(LoginUser.java)
这个类主要用于struts2跳转到这个action后。默认执行execute()方法。并根据结果返回字符，然后struts2.xml根据返回的字符跳到相应的页面
[java] view
plaincopyprint?
package todayMZ.user.action;
public class UserAction {
private String username;
private String password;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String execute() throws Exception {
// 只要用户名为todayMZ，密码为1234就可成功登陆
if ("todayMZ".equals(this.getUsername().trim()) && "1234".equals(this.getPassword().trim())) {
return "success";
} else {
return "fail";
}
}
}
6.写jsp页面
这里有三个jsp页面：login.jsp, success.jsp, fail.jsp
login.jsp（用了简单的标签）
[html] view
plaincopyprint?
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>登陆页面</title>
</head>
<body>
<center>
<s:form action="loginUser" method="post" namespace="/" >
<s:textfield name="username" label="用户名"></s:textfield>
<s:password name="password" label="密码"></s:password>
<s:submit value="确定"/>
<s:reset value="重置"/>
</s:form>
</center>
</body>
</html>
success.jsp
[html] view
plaincopyprint?
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>成功页面</title>
</head>
<body>
<p align="center">登陆成功！！！您的用户名是<s:property value="username"></s:property></p>
</body>
</html>
fail.jsp
[html] view
plaincopyprint?
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>失败页面</title>
</head>
<body>
<p align="center">登陆失败！！！</p>
</body>
</html>
例子：登陆的Struts2案例
环境：
IDE工具：Myeclipse , Tomcat6.0
所需jar包：
struts2-core-2.1.8.1.jar
struts2-json-plugin-2.1.8.1.jar
xwork-core-2.1.6.jar
commons-fileupload-1.2.1.jar
freemarker-2.3.15.jar
junit4.4.jar
ognl-2.6.7.jar
步骤:
1. 创建一个web project项目
2.导入Struts2所需jar包
3.配置web.xml
4.配置struts2.xml
5.写action类(LoginUser.java)
6.写jsp页面
7.启动tomcat.运行项目
项目最后截图：
开始：
1.创建一个项目
还是截图，项目名称为：Struts2SpExa
2.导入所需jar包
导入所需jar包到项目的lib文件夹下(或者通过Build Path导入也可)
3.在WEB-INF下面的web.xml中配置：
配置拦截器和起始页面
[html] view
plaincopyprint?
<?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>/WEB-INF/jsp/login.jsp</welcome-file>
</welcome-file-list>
</web-app>
4.配置struts.xml
配置strust2要调用的action
[html] view
plaincopyprint?
<?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">
<!--配置struts action>
<struts>
<package name="todayMZ" extends="struts-default" namespace="/">
<action name="loginUser" class="todayMZ.user.action.UserAction">
<result name="success">/WEB-INF/jsp/success.jsp</result>
<result name="fail">/WEB-INF/jsp/fail.jsp</result>
</action>
</package>
</struts>
5.写action类(LoginUser.java)
这个类主要用于struts2跳转到这个action后。默认执行execute()方法。并根据结果返回字符，然后struts2.xml根据返回的字符跳到相应的页面
[java] view
plaincopyprint?
package todayMZ.user.action;
public class UserAction {
private String username;
private String password;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String execute() throws Exception {
// 只要用户名为todayMZ，密码为1234就可成功登陆
if ("todayMZ".equals(this.getUsername().trim()) && "1234".equals(this.getPassword().trim())) {
return "success";
} else {
return "fail";
}
}
}
6.写jsp页面
这里有三个jsp页面：login.jsp, success.jsp, fail.jsp
login.jsp（用了简单的标签）
[html] view
plaincopyprint?
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>登陆页面</title>
</head>
<body>
<center>
<s:form action="loginUser" method="post" namespace="/" >
<s:textfield name="username" label="用户名"></s:textfield>
<s:password name="password" label="密码"></s:password>
<s:submit value="确定"/>
<s:reset value="重置"/>
</s:form>
</center>
</body>
</html>
success.jsp
[html] view
plaincopyprint?
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>成功页面</title>
</head>
<body>
<p align="center">登陆成功！！！您的用户名是<s:property value="username"></s:property></p>
</body>
</html>
fail.jsp
[html] view
plaincopyprint?
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>失败页面</title>
</head>
<body>
<p align="center">登陆失败！！！</p>
</body>
</html>
内容来自用户分享和网络整理，不保证内容的准确性，如有侵权内容，可联系管理员处理 
相关文章推荐
- Spring常见问题汇总
- Java首课
- java下io文件切割合并功能加配置文件
- Spring减少MVC的代码冗余
- Java入门-泛型
- 利用lombok中的注解消除javabean代码冗余
- Spring MVC和Struts2的区别
- Struts2整合Spring
- java安全沙箱（二）之.class文件检验器
- Java transient关键字使用笔记
- org.springframework.dao.InvalidDataAccessApiUsageException: Name must not be null or empty!;
- javaSE基础编程——编写一个简单的计算器
- java分页类（程序处理分页，非数据库处理分页）
- jdk1.8 HashMap简介翻译
- java script
- 《Java核心技术卷二》笔记（一）流与文件
- javaSE基础编程——字节流
- javaSE基础编程——String的转换功能
- 初识 maven
- javaSE基础编程——斐波那契数列