Spring-security在SSM项目中实现简单的权限控制及用户登录退出(未完善)

1.导入相关jar包maven坐标

		<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>org.springframework.security</groupId>
			<artifactId>spring-security-core</artifactId>
			<version>${spring.security.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework.security</groupId>
			<artifactId>spring-security-taglibs</artifactId>
			<version>${spring.security.version}</version>
		</dependency>

2.web.xml中的配置

<!-- 配置加载类路径的配置文件 -->
	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>classpath*:applicationContext.xml,classpath*:spring-security.xml</param-value>
	</context-param>
	<!-- 配置监听器 -->
	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>
	
<!--配置spring-Security-->
	<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>/*
	

3.Spring-security的配置文件

<?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" -->
		<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.do"
				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.do" 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>

4.UserService

package com.hhd.service.impl;

import com.hhd.dao.IUserDao;
import com.hhd.domain.Role;
import com.hhd.domain.UserInfo;
import com.hhd.service.IUserService;
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.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

/**
 * @ClassName IUserServiceImpl
 * @Description TODO
 * @Author hhd
 * @Date 2020/4/15 15:07
 */
@Service("userService")
@Transactional
public class IUserServiceImpl implements IUserService {

    @Autowired
    private IUserDao userDao;

    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        UserInfo userInfo = null;
        try {
            userInfo = userDao.findByUsername(username);
        } catch (Exception e) {
            e.printStackTrace();
        }
        User user = new User(userInfo.getUsername(), "{noop}" + userInfo.getPassword(), userInfo.getStatus() != 0,
                true, true, true, getAuthority(userInfo.getRoles()));
        return user;
    }

    private List<SimpleGrantedAuthority> getAuthority(List<Role> roles) {
        ArrayList<SimpleGrantedAuthority> authoritys = new ArrayList<>();
        for (Role role : roles) {
            authoritys.add(new SimpleGrantedAuthority("ROLE_" + role.getRoleName()));
        }
        return authoritys;
    }
}

5.使用spring security完成用户退出，非常简单

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