简单的聊一下Spring Security入门级知识,希望对新手会有帮助!

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导入依赖

 <dependencies>
     <!-- https://mvnrepository.com/artifact/org.springframework.security/spring-security-web -->
     <dependency>
         <groupId>org.springframework.security</groupId>
         <artifactId>spring-security-web</artifactId>
         <version>5.1.6.RELEASE</version>
     </dependency>

     <!-- https://mvnrepository.com/artifact/org.springframework.security/spring-security-config -->
     <dependency>
         <groupId>org.springframework.security</groupId>
         <artifactId>spring-security-config</artifactId>
         <version>5.1.6.RELEASE</version>
     </dependency>

     <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>javax.servlet</groupId>
         <artifactId>javax.servlet-api</artifactId>
         <version>4.0.1</version>
     </dependency>

 </dependencies>

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WEB-INF下的web.xml如下配置

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
         version="4.0">

    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:spring-security-quickstart.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>
    <welcome-file-list>
        <welcome-file>index.html</welcome-file>
        <welcome-file>index.htm</welcome-file>
        <welcome-file>index.jsp</welcome-file>
        <welcome-file>default.html</welcome-file>
        <welcome-file>default.htm</welcome-file>
        <welcome-file>default.jsp</welcome-file>
    </welcome-file-list>
</web-app>

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resource下的spring-security-quickstart.xml配置如下

注:通过配置文件进行登录,而不是数据库。真是项目是要连接数据库

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:security="http://www.springframework.org/schema/security"
       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
">

    <security:http auto-config= "true" use-expressions="false">
        <!--
        配置资料连接,
        /**表示任意路径,
        /** + access表示任意路径都需要ROLE_USER权限
        -->
   		<security:intercept-url pattern="/**" access="ROLE_USER"/>
        <!-- 自定义登陆页面,login-page 自定义登陆页面 authentication-failure-url 用户权限校验失败之后才会跳转到这个页面,如果数据库中没有这个用户则不会跳转到这个页面。
            default-target-url 登陆成功后跳转的页面。 注:登陆页面用户名固定 username,密码 password,action:login -->

    </security:http>

    <!--通过配置文件设定俩用户并给与权限 -->
    <security:authentication-manager>
        <security:authentication-provider>
            <security:user-service>
            <!--如果有ROLE_USER这个权限,就可以通过-->
                <security:user name="user" password="{noop}user"
                               authorities="ROLE_USER" />
                <security:user name="admin" password="{noop}admin"
                               authorities="ROLE_ADMIN" />
            </security:user-service>
        </security:authentication-provider>
    </security:authentication-manager>
</beans>

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自定义登录成功或者失败页面

登录页

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>Insert title here</title>
</head>
<body>
<form action="login" method="post">
    <table>
        <tr>
            <td>用户名:</td>
            <td><input type="text" name="username" /></td>
        </tr>
        <tr>
            <td>密码:</td>
            <td><input type="password" name="password" /></td>
        </tr>
        <tr>
            <td colspan="2" align="center"><input type="submit" value="登录" />
                <input type="reset" value="重置" /></td>
        </tr>
    </table>
</form>
</body>
</html>

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成功页

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
登陆成功
</body>
</html>

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失败页面

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
用户名或者密码错误
</body>
</html>

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配置文件设置

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:security="http://www.springframework.org/schema/security"
       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
">

    <!-- 配置不过滤的资源(静态资源及登录相关) -->
    <security:http security="none" pattern="/login.html" />
    <security:http security="none" pattern="/failer.html" />


    <security:http auto-config= "true" use-expressions="false">
        <!--
        配置拦截intercept,
        /**表示任意路径,
        /** + access表示任意路径都需要ROLE_USER权限,否则就会被拦截
         -->
        <security:intercept-url pattern="/**" access="ROLE_USER" />
        <!-- 自定义登陆页面,login-page 自定义登陆页面 authentication-failure-url 用户权限校验失败之后才会跳转到这个页面,如果数据库中没有这个用户则不会跳转到这个页面。
            default-target-url 登陆成功后跳转的页面。 注:登陆页面用户名固定 username,密码 password,action:login -->

        <!--登录设置:登录成功往哪里跳、失败往哪里跳等-->
        <security:form-login login-page="/login.html"
                             login-processing-url="/login" username-parameter="username"
                             password-parameter="password" authentication-failure-url="/failer.html"
                             default-target-url="/success.html" authentication-success-forward-url="/success.html"
        />

        <!-- 关闭CSRF,默认是开启的 -->
        <security:csrf disabled="true" />

    </security:http>

    <!--通过配置文件设定俩用户并给与权限 -->
    <security:authentication-manager>
        <security:authentication-provider>
            <security:user-service>
                <security:user name="user" password="{noop}user"
                               authorities="ROLE_USER" />
                <security:user name="admin" password="{noop}admin"
                               authorities="ROLE_ADMIN" />
            </security:user-service>
        </security:authentication-provider>
    </security:authentication-manager>
</beans>

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再启动程序

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