spring security 入门讲解

登录 图解 

1.添加依赖项目 spring-security-web和spring-security-config

pom.xml

[code]<?xml version="1.0" encoding="UTF-8"?>

<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.itcast</groupId>
<artifactId>spring_security_login</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>

<name>spring_security_login</name>
<!-- FIXME change it to the project's website -->
<url>http://www.example.com</url>

<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<spring.version>5.0.2.RELEASE</spring.version>
<spring.security.version>5.0.1.RELEASE</spring.security.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>${spring.security.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-config</artifactId>
<version>${spring.security.version}</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
<scope>provided</scope>
</dependency>
</dependencies>

<build>
<finalName>spring_security</finalName>
<pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
<plugins>
<!-- java编译插件 -->
<!-- <plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.2</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
<encoding>UTF-8</encoding>
</configuration>
</plugin>-->

<!-- 	配置tomcat7插件 -->
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.2</version>
<configuration>
<port>8080</port>
<uriEncoding>utf-8</uriEncoding><!-- 解决get请求乱码问题 -->
</configuration>
</plugin>
</plugins>
</pluginManagement>
</build>
</project>

在web.xml中添加springSecurity的filter

[code]<?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">
<display-name>SpringSecurity</display-name>

<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>

• 添加配置文件spring-security.xml
• 内存中用户名 和 密码

[code]<?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 security="none" pattern="/success.html"/>

<!-- auto-config配置后，不需要在配置下面信息 <security:form-login />
定义登录表单信息 <security:http-basic/> <security:logout /> -->
<security:http auto-config="true" use-expressions="false">

<!-- intercept-url定义一个过滤规则
pattern表示对哪些url进行权限控制，
access属性表示在请求对应 的URL时需要什么权限，
默认配置时它应该是一个以逗号分隔的角色列表，请求的用户只需拥有其中的一个角色就能成功访问对应 的URL -->
<!-- 配置资料连接，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="/login.html" 自定义登陆页面
login-processing-url="/login" 登录页面路径   action:login
authentication-failure-url 用户权限(对用户所能访问的资源进行控制)校验失败(403表示权限不够)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。
authentication-success-forward-url="" 认证(验证用户名密码是否正确的过程)成功后跳转页面
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， -->
<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"
/>

<!-- 登出
invalidate-session 是否删除session
logout-url：登出处理链接
logout-success-url：登出成功页面
注：登出操作 只需要链接到 logout即可登出当前用户 -->
<security:logout invalidate-session="true" logout-url="/logout" logout-success-url="/login.jsp" />

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

</security:http>
<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>

 数据库中用户名 和 密码

[code]<?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">

<!-- 配置不拦截的资源 -->
<security:http pattern="/login.jsp" security="none"/>
<security:http pattern="/failer.jsp" security="none"/>
<security:http pattern="/css/**" security="none"/>
<security:http pattern="/img/**" security="none"/>
<security:http pattern="/plugins/**" security="none"/>

<!--
配置具体的规则
auto-config="true"	不用自己编写登录的页面，框架提供默认登录页面
use-expressions="false"	是否使用SPEL表达式（没学习过）
-->
<security:http auto-config="true" use-expressions="false">
<!-- 配置具体的拦截的规则 pattern="请求路径的规则" access="访问系统的人，必须有ROLE_USER的角色. 角色不匹配 可以登录成功 但访问不了资源" -->
<security:intercept-url pattern="/**" access="ROLE_USER,ROLE_ADMIN"/>

<!-- 定义跳转的具体的页面 -->
<security:form-login
login-page="/login.jsp"
login-processing-url="/login"
default-target-url="/index.jsp"
authentication-failure-url="/failer.jsp"
authentication-success-forward-url="/pages/main.jsp"
/>

<!-- 关闭跨域请求 -->
<security:csrf disabled="true"/>

<!-- 退出 -->
<security:logout invalidate-session="true" logout-url="/logout" logout-success-url="/login.jsp"/>

</security:http>

<!-- 切换成数据库中的用户名和密码 -->
<security:authentication-manager>
<security:authentication-provider user-service-ref="userService">
<!-- 配置加密的方式-->
<security:password-encoder ref="passwordEncoder"/>
</security:authentication-provider>
</security:authentication-manager>

<!-- 配置加密类 -->
<bean id="passwordEncoder" class="org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder"/>

<!-- 提供了入门的方式，在内存中存入用户名和密码
<security:authentication-manager>
<security:authentication-provider>
<security:user-service>
<security:user name="admin" password="{noop}admin" authorities="ROLE_USER"/>
</security:user-service>
</security:authentication-provider>
</security:authentication-manager>
-->

</beans>

业务层  实现类

[code]package com.itheima.service.impl;

import com.itheima.dao.UserInfoDao;
import com.itheima.domain.Role;
import com.itheima.domain.UserInfo;
import com.itheima.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.User;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import javax.servlet.http.HttpServletRequest;
import java.util.ArrayList;
import java.util.List;

@Service("userService")
@Transactional
public class UserService
2fa2e
Impl implements UserService {
@Autowired
private UserInfoDao userInfoDao;

@Autowired  //对密码加密的类
private BCryptPasswordEncoder bCryptPasswordEncoder;

/**
* spring security 登录验证
*
* @param username
* @return
* @throws UsernameNotFoundException
*/
public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
UserInfo userInfo = userInfoDao.findByUsername(username);
List<Role> roles = userInfo.getRoles();
List<SimpleGrantedAuthority> authoritys = getAuthority(roles);
//User implements UserDetails
User user = new User(userInfo.getUsername(), userInfo.getPassword(), userInfo.getStatus() == 0 ? false : true, true, true, true, authoritys);
return user;
}

//返回集合 集合中都是角色描述
private List<SimpleGrantedAuthority> getAuthority(List<Role> roles) {
List<SimpleGrantedAuthority> authoritys = new ArrayList();
for (Role role : roles) {
authoritys.add(new SimpleGrantedAuthority("ROLE_" + role.getRoleName()));
}
return authoritys;
}

}

业务串  接口

[code]package com.itheima.service;

import com.itheima.domain.UserInfo;
import org.springframework.security.core.userdetails.UserDetailsService;

import java.util.List;

//继承UserDetailsService

public interface UserService extends UserDetailsService {

}