权限框架springSecurity的入门(一)

目前有了解到的权限框架有springSecurity和shiro两种,先做一个关于springSecurity的简单demo,后面再将shiro的补充上:
Spring Security 是一个能够为基于 Spring 的企业应用系统提供声明式的安全访问控制解决方案的安全框架。它提供了一组可以在 Spring 应用上下文中配置的 Bean，充分利用了Spring IoC，DI（控制反转 Inversion of Control ,DI:Dependency Injection 依赖注入）和 AOP（面向切面编程）功能，为应用系统提供声明式的安全访问控制功能，减少了为企业系统安全控制编写大量重复代码的工作。1.pom.xml的配置<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion>
<groupId>com.springsecurity</groupId>
<artifactId>springsecurity</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>

<properties>
<spring.version>4.2.4.RELEASE</spring.version>
</properties>

<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>${spring.version}</version>
</dependency>

<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-web</artifactId>
<version>4.1.0.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-config</artifactId>
<version>4.1.0.RELEASE</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
<scope>provided</scope>
</dependency>
</dependencies>

<build>
<plugins>
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.2</version>
<configuration>
<!-- 指定端口 -->
<port>9090</port>
<!-- 请求路径 -->
<path>/</path>
</configuration>
</plugin>

<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.2</version>
</plugin>
</plugins>
</build>
</project>2.web.xml文件的配置:

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5">
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-security.xml</param-value>
</context-param>
<listener>
<listener-class>
org.springframework.web.context.ContextLoaderListener
</listener-class>
</listener>
<filter>
<filter-name>springSecurityFilterChain</filter-name>
<filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
</filter>
<filter-mapping>
<filter-name>springSecurityFilterChain</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>

3.spring-security.xml文件的配置及配置说明:

<?xml version="1.0" encoding="UTF-8"?>
<beans:beans xmlns="http://www.springframework.org/schema/security"
xmlns:beans="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/security http://www.springframework.org/schema/security/spring-security.xsd"> 
<!-- 设置不拦截页面 -->
<http pattern="/login.html" security="none"></http>
<http pattern="/login_error.html" security="none"></http>

<!-- 页面拦截规则 -->
<http use-express
95f6
ions="false">
<!-- intercept-url表示拦截的页面, -->
<intercept-url pattern="/**" access="ROLE_USER" />
<!--/**表示该目录下和子目录下的资源 -->
<!--配置了form-login 才可以设置access为"ROLE_USER",否则就要配置为access="hasRole('ROLE_USER')" -->
<form-login login-page="/login.html" default-target-url="/index.html"
authentication-failure-url="/login_error.html"/>
<!--
login-page：指定登录页面。
authentication-failure-url：指定了身份验证失败时跳转到的页面。
default-target-url：指定了成功进行身份验证和授权后默认呈现给用户的页面。
csrf disabled="true"  关闭 csrf ,如果不加会出现错误
-->
<csrf disabled="true"/>
</http>

<!-- 认证管理器 -->
<authentication-manager>
<authentication-provider>
<user-service>
<user name="admin" password="123456" authorities="ROLE_USER"/>
</user-service>
</authentication-provider>
</authentication-manager>
</beans:beans>

4.登陆页面:

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>登陆</title>
</head>
<body>
<form action="/login" method="post">
<table>
<tr>
<td>用户名</td>
<td><input type="text" name="username" value=''></td>
</tr>
<tr>
<td>密码</td>
<td><input type="password" name="password" value=''></td>
</tr>
<tr>
<td colspan='2'><input name='submit' type='submit' value='登陆'></td>
</tr>
</table>
</form>

</body>
</html>

将包结构贴上:



说明:
1.如果用户名和密码正确就会跳转导登陆成功index.html页面,
2.如果用户名和密码正确就会跳转导登陆login_error.html页面
补充:一般用户名和密码不会固定死,需要从数据库中查询,需要在service层实现UserDetailSerive接口,重写方法loadUserByUsername方法.完成调用dao层实现和数据库的交互.