在以前的幾篇security教程中,資源和所對應的權限都是在xml中進行配置的,也就在http標籤中配置intercept-url,試想要是配置的對象很少,那還好,可是日常實際開發中都每每是很是多的資源和權限對應,並且寫在配置文件裏面寫改起來還得該源碼配置文件,這顯然是很差的。所以接下來,將用數據庫管理資源和權限的對應關係。數據庫仍是接着以前的,用mysql數據庫,所以也不用另外引入額外的jar包。java
數據庫要提供給security的數據無非就是,資源(說的通俗點就是範圍資源地址)和對應的權限,這裏就有兩張表,可是由於他們倆是多對多的關係,所以還要設計一張讓這兩張表關聯起來的表,除此以外,還有一張用戶表,有由於用戶和角色也是多對多的關係,還要額外加一張用戶和角色關聯的表。這樣總共下來就是五張表。下面就是對應的模型圖:mysql
建表和添加數據的sql語句:web
DROP TABLE IF EXISTS `resc`;
CREATE TABLE `resc` (
`id` bigint(20) NOT NULL DEFAULT '0',
`name` varchar(50) DEFAULT NULL,
`res_type` varchar(50) DEFAULT NULL,
`res_string` varchar(200) DEFAULT NULL,
`descn` varchar(200) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
-- ----------------------------
-- Records of resc
-- ----------------------------
INSERT INTO `resc` VALUES ('1', '', 'URL', '/adminPage.jsp', '管理員頁面');
INSERT INTO `resc` VALUES ('2', '', 'URL', '/index.jsp', '');
INSERT INTO `resc` VALUES ('3', null, 'URL', '/test.jsp', '測試頁面');
-- ----------------------------
-- Table structure for resc_role
-- ----------------------------
DROP TABLE IF EXISTS `resc_role`;
CREATE TABLE `resc_role` (
`resc_id` bigint(20) NOT NULL DEFAULT '0',
`role_id` bigint(20) NOT NULL DEFAULT '0',
PRIMARY KEY (`resc_id`,`role_id`),
KEY `fk_resc_role_role` (`role_id`),
CONSTRAINT `fk_resc_role_role` FOREIGN KEY (`role_id`) REFERENCES `role` (`id`),
CONSTRAINT `fk_resc_role_resc` FOREIGN KEY (`resc_id`) REFERENCES `resc` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
-- ----------------------------
-- Records of resc_role
-- ----------------------------
INSERT INTO `resc_role` VALUES ('1', '1');
INSERT INTO `resc_role` VALUES ('2', '1');
INSERT INTO `resc_role` VALUES ('2', '2');
INSERT INTO `resc_role` VALUES ('3', '3');
-- ----------------------------
-- Table structure for role
-- ----------------------------
DROP TABLE IF EXISTS `role`;
CREATE TABLE `role` (
`id` bigint(20) NOT NULL DEFAULT '0',
`name` varchar(50) DEFAULT NULL,
`descn` varchar(200) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
-- ----------------------------
-- Records of role
-- ----------------------------
INSERT INTO `role` VALUES ('1', 'ROLE_ADMIN', '管理員角色');
INSERT INTO `role` VALUES ('2', 'ROLE_USER', '用戶角色');
INSERT INTO `role` VALUES ('3', 'ROLE_TEST', '測試角色');
-- ----------------------------
-- Table structure for t_c3p0
-- ----------------------------
DROP TABLE IF EXISTS `t_c3p0`;
CREATE TABLE `t_c3p0` (
`a` char(1) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
-- ----------------------------
-- Records of t_c3p0
-- ----------------------------
-- ----------------------------
-- Table structure for user
-- ----------------------------
DROP TABLE IF EXISTS `user`;
CREATE TABLE `user` (
`id` bigint(20) NOT NULL DEFAULT '0',
`username` varchar(50) DEFAULT NULL,
`password` varchar(50) DEFAULT NULL,
`status` int(11) DEFAULT NULL,
`descn` varchar(200) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
-- ----------------------------
-- Records of user
-- ----------------------------
INSERT INTO `user` VALUES ('1', 'admin', 'admin', '1', '管理員');
INSERT INTO `user` VALUES ('2', 'user', 'user', '1', '用戶');
INSERT INTO `user` VALUES ('3', 'test', 'test', '1', '測試');
-- ----------------------------
-- Table structure for user_role
-- ----------------------------
DROP TABLE IF EXISTS `user_role`;
CREATE TABLE `user_role` (
`user_id` bigint(20) NOT NULL DEFAULT '0',
`role_id` bigint(20) NOT NULL DEFAULT '0',
PRIMARY KEY (`user_id`,`role_id`),
KEY `fk_user_role_role` (`role_id`),
CONSTRAINT `fk_user_role_role` FOREIGN KEY (`role_id`) REFERENCES `role` (`id`),
CONSTRAINT `fk_user_role_user` FOREIGN KEY (`user_id`) REFERENCES `user` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
-- ----------------------------
-- Records of user_role
-- ----------------------------
INSERT INTO `user_role` VALUES ('1', '1');
INSERT INTO `user_role` VALUES ('1', '2');
INSERT INTO `user_role` VALUES ('2', '2');
INSERT INTO `user_role` VALUES ('3', '3');複製代碼
user表中包含用戶登錄信息,role角色表中包含受權信息,resc資源表中包含須要保護的資源。spring
Spring Security須要的數據無非就是pattern和access相似鍵值對的數據,就像配置文件中寫的那樣:sql
<intercept-url pattern="/login.jsp" access="IS_AUTHENTICATED_ANONYMOUSLY" />1
<intercept-url pattern="/admin.jsp" access="ROLE_ADMIN" />
<intercept-url pattern="/**" access="ROLE_USER" />複製代碼
其實當項目啓動時,Spring Security所作的就是在系統初始化時,將以上XML中的信息轉換爲特定的數據格式,而框架中其餘組件能夠利用這些特定格式的數據,用於控制以後的驗證操做。如今咱們將這些信息存儲在數據庫中,所以就要想辦法從數據庫中查詢這些數據,因此根據security數據的須要,只須要以下sql語句就能夠:數據庫
select re.res_string,r.name from role r,resc re,resc_role rr where
r.id=rr.role_id and re.id=rr.resc_id複製代碼
在數據中執行這條語句作測試,獲得以下結果:緩存
這樣的格式正是security所須要的數據。服務器
雖然上述的數據符合security的須要,可是security將這種數據類型進行了封裝,把它封裝成 Map
/**
* @classname JdbcRequestMapBulider
* @author ZMC
* @time 2017-1-10
* 查詢資源和角色,並構建RequestMap
*/
public class JdbcRequestMapBulider
extends JdbcDaoSupport{
//查詢資源和權限關係的sql語句
private String resourceQuery = "";
public String getResourceQuery() {
return resourceQuery;
}
//查詢資源
public List<Resource> findResources() {
ResourceMapping resourceMapping = new ResourceMapping(getDataSource(),
resourceQuery);
return resourceMapping.execute();
}
//拼接RequestMap
public LinkedHashMap<RequestMatcher, Collection<ConfigAttribute>> buildRequestMap() {
LinkedHashMap<RequestMatcher, Collection<ConfigAttribute>> requestMap = new LinkedHashMap<>();
List<Resource> resourceList = this.findResources();
for (Resource resource : resourceList) {
RequestMatcher requestMatcher = this.getRequestMatcher(resource.getUrl());
List<ConfigAttribute> list = new ArrayList<ConfigAttribute>();
list.add(new SecurityConfig(resource.getRole()));
requestMap.put(requestMatcher, list);
}
return requestMap;
}
//經過一個字符串地址構建一個AntPathRequestMatcher對象
protected RequestMatcher getRequestMatcher(String url) {
return new AntPathRequestMatcher(url);
}
public void setResourceQuery(String resourceQuery) {
this.resourceQuery = resourceQuery;
}
/**
* @classname Resource
* @author ZMC
* @time 2017-1-10
* 資源內部類
*/
private class Resource {
private String url;//資源訪問的地址
private String role;//所須要的權限
public Resource(String url, String role) {
this.url = url;
this.role = role;
}
public String getUrl() {
return url;
}
public String getRole() {
return role;
}
}
private class ResourceMapping extends MappingSqlQuery {
protected ResourceMapping(DataSource dataSource,
String resourceQuery) {
super(dataSource, resourceQuery);
compile();
}
//對結果集進行封裝處理
protected Object mapRow(ResultSet rs, int rownum)
throws SQLException {
String url = rs.getString(1);
String role = rs.getString(2);
Resource resource = new Resource(url, role);
return resource;
}
}
}複製代碼
說明:resourceQuery是查詢數據的sql語句,該屬性在配置bean的時候傳入便可。session
內部建立了一個resource來封裝數據。
getRequestMatcher方法就是用來建立RequestMatcher對象的
buildRequestMap方法用來最後拼接成LinkedHashMap
在將這部以前,先得了解大概下security的運行過程,security實現控制的功能其實就是經過一系列的攔截器來實現的,當用戶登錄的時候,會被AuthenticationProcessingFilter攔截,調用AuthenticationManager的實現類,同時AuthenticationManager會調用ProviderManager來獲取用戶驗證信息,其中不一樣的Provider調用的服務不一樣,由於這些信息能夠是在數據庫上,能夠是在LDAP服務器上,能夠是xml配置文件上等,這個例子中就是爲數據庫;若是驗證經過後會將用戶的權限信息放到spring的全局緩存SecurityContextHolder中,以備後面訪問資源時使用。當訪問資源,訪問url時,會經過AbstractSecurityInterceptor攔截器攔截,其中會調用FilterInvocationSecurityMetadataSource的方法來獲取被攔截url所需的所有權限,其中FilterInvocationSecurityMetadataSource的經常使用的實現類爲DefaultFilterInvocationSecurityMetadataSource,這個類中有個很關鍵的東西就是requestMap,也就是咱們上面所獲得的數據,在調用受權管理器AccessDecisionManager,這個受權管理器會經過spring的全局緩存SecurityContextHolder獲取用戶的權限信息,還會獲取被攔截的url和被攔截url所需的所有權限,而後根據所配的策略,若是權限足夠,則返回,權限不夠則報錯並調用權限不足頁面。
根據源碼debug跟蹤得出,其實資源權限關係就放在DefaultFilterInvocationSecurityMetadataSource的requestMap,中的,這個requestMap就是咱們JdbcRequestMapBulider.buildRequestMap()方法所須要的數據類型,所以,順氣天然就想到了咱們自定義一個類繼承FilterInvocationSecurityMetadataSource接口,將數據查出的數據放到requestMap中去。制定類MyFilterInvocationSecurityMetadataSource繼承FilterInvocationSecurityMetadataSource和InitializingBean接口。
/**
* @classname MyFilterInvocationSecurityMetadataSource
* @author ZMC
* @time 2017-1-10
*/
public class MyFilterInvocationSecurityMetadataSource implements
FilterInvocationSecurityMetadataSource, InitializingBean {
private final static List<ConfigAttribute> NULL_CONFIG_ATTRIBUTE = null;
// 資源權限集合
private Map<RequestMatcher, Collection<ConfigAttribute>> requestMap;
//查找數據庫權限和資源關係
private JdbcRequestMapBulider builder;
/*
* (non-Javadoc)
* @see
* org.springframework.security.access.SecurityMetadataSource#getAttributes
* (java.lang.Object)
* 更具訪問資源的地址查找所須要的權限
*/
@Override
public Collection<ConfigAttribute> getAttributes(Object object)
throws IllegalArgumentException {
final HttpServletRequest request = ((FilterInvocation) object)
.getRequest();
Collection<ConfigAttribute> attrs = NULL_CONFIG_ATTRIBUTE;
for (Map.Entry<RequestMatcher, Collection<ConfigAttribute>> entry : requestMap
.entrySet()) {
if (entry.getKey().matches(request)) {
attrs = entry.getValue();
break;
}
}
return attrs;
}
/*
* (non-Javadoc)
*
* @see org.springframework.security.access.SecurityMetadataSource#
* getAllConfigAttributes()
* 獲取全部的權限
*/
@Override
public Collection<ConfigAttribute> getAllConfigAttributes() {
Set<ConfigAttribute> allAttributes = new HashSet<ConfigAttribute>();
for (Map.Entry<RequestMatcher, Collection<ConfigAttribute>> entry : requestMap
.entrySet()) {
allAttributes.addAll(entry.getValue());
}
System.out.println("總共有這些權限:"+allAttributes.toString());
return allAttributes;
}
/*
* (non-Javadoc)
*
* @see
* org.springframework.security.access.SecurityMetadataSource#supports(java
* .lang.Class)
*/
@Override
public boolean supports(Class<?> clazz) {
return FilterInvocation.class.isAssignableFrom(clazz);
}
//綁定requestMap
protected Map<RequestMatcher, Collection<ConfigAttribute>> bindRequestMap() {
return builder.buildRequestMap();
}
/*
* (non-Javadoc)
*
* @see
* org.springframework.beans.factory.InitializingBean#afterPropertiesSet()
*/
@Override
public void afterPropertiesSet() throws Exception {
this.requestMap = this.bindRequestMap();
}
public void refreshResuorceMap() {
this.requestMap = this.bindRequestMap();
}
//get方法
public JdbcRequestMapBulider getBuilder() {
return builder;
}
//set方法
public void setBuilder(JdbcRequestMapBulider builder) {
this.builder = builder;
}
}複製代碼
說明:requestMap這個屬性就是用來存放資源權限的集合
builder爲JdbcRequestMapBulider類型,用來查找數據庫權限和資源關係
其餘的代碼中都有詳細的註釋
<?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-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.1.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
http://www.springframework.org/schema/security
http://www.springframework.org/schema/security/spring-security.xsd">
<http pattern="/login.jsp" security="none"></http>
<http auto-config="false">
<form-login login-page="/login.jsp" default-target-url="/index.jsp"
authentication-failure-url="/login.jsp?error=true" />
<logout invalidate-session="true" logout-success-url="/login.jsp"
logout-url="/j_spring_security_logout" />
<!-- 經過配置custom-filter來增長過濾器,before="FILTER_SECURITY_INTERCEPTOR"表示在SpringSecurity默認的過濾器以前執行。 -->
<custom-filter ref="filterSecurityInterceptor" before="FILTER_SECURITY_INTERCEPTOR" />
</http>
<!-- 數據源 -->
<beans:bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
destroy-method="close">
<!-- 此爲c3p0在spring中直接配置datasource c3p0是一個開源的JDBC鏈接池 -->
<beans:property name="driverClass" value="com.mysql.jdbc.Driver" />
<beans:property name="jdbcUrl"
value="jdbc:mysql://localhost:3306/springsecuritydemo?useUnicode=true&characterEncoding=UTF-8" />
<beans:property name="user" value="root" />
<beans:property name="password" value="" />
<beans:property name="maxPoolSize" value="50"></beans:property>
<beans:property name="minPoolSize" value="10"></beans:property>
<beans:property name="initialPoolSize" value="10"></beans:property>
<beans:property name="maxIdleTime" value="25000"></beans:property>
<beans:property name="acquireIncrement" value="1"></beans:property>
<beans:property name="acquireRetryAttempts" value="30"></beans:property>
<beans:property name="acquireRetryDelay" value="1000"></beans:property>
<beans:property name="testConnectionOnCheckin" value="true"></beans:property>
<beans:property name="idleConnectionTestPeriod" value="18000"></beans:property>
<beans:property name="checkoutTimeout" value="5000"></beans:property>
<beans:property name="automaticTestTable" value="t_c3p0"></beans:property>
</beans:bean>
<beans:bean id="builder" class="com.zmc.demo.JdbcRequestMapBulider">
<beans:property name="dataSource" ref="dataSource" />
<beans:property name="resourceQuery"
value="select re.res_string,r.name from role r,resc re,resc_role rr where
r.id=rr.role_id and re.id=rr.resc_id" />
</beans:bean>
<!-- 認證過濾器 -->
<beans:bean id="filterSecurityInterceptor"
class="org.springframework.security.web.access.intercept.FilterSecurityInterceptor">
<!-- 用戶擁有的權限 -->
<beans:property name="accessDecisionManager" ref="accessDecisionManager" />
<!-- 用戶是否擁有所請求資源的權限 -->
<beans:property name="authenticationManager" ref="authenticationManager" />
<!-- 資源與權限對應關係 -->
<beans:property name="securityMetadataSource" ref="securityMetadataSource" />
</beans:bean>
<!-- 受權管理器 -->
<beans:bean class="com.zmc.demo.MyAccessDecisionManager" id="accessDecisionManager">
</beans:bean>
<!--認證管理-->
<authentication-manager alias="authenticationManager">
<authentication-provider>
<jdbc-user-service data-source-ref="dataSource" id="usersService"
users-by-username-query="select username,password,status as enabled from user where username = ?"
authorities-by-username-query="select user.username,role.name from user,role,user_role
where user.id=user_role.user_id and
user_role.role_id=role.id and user.username=?" />
</authentication-provider>
</authentication-manager>
<!--自定義的切入點-->
<beans:bean id="securityMetadataSource"
class="com.zmc.demo.MyFilterInvocationSecurityMetadataSource">
<beans:property name="builder" ref="builder"></beans:property>
</beans:bean>
</beans:beans>複製代碼
說明
/**
* @classname MyAccessDecisionManager
* @author ZMC
* @time 2017-1-10
*
*/
public class MyAccessDecisionManager implements AccessDecisionManager {
/* (non-Javadoc)
* @see org.springframework.security.access.AccessDecisionManager#decide(org.springframework.security.core.Authentication, java.lang.Object, java.util.Collection)
* 該方法決定該權限是否有權限訪問該資源,其實object就是一個資源的地址,authentication是當前用戶的
* 對應權限,若是沒登錄就爲遊客,登錄了就是該用戶對應的權限
*/
@Override
public void decide(Authentication authentication, Object object,
Collection<ConfigAttribute> configAttributes)
throws AccessDeniedException, InsufficientAuthenticationException {
if(configAttributes == null) {
return;
}
//所請求的資源擁有的權限(一個資源對多個權限)
Iterator<ConfigAttribute> iterator = configAttributes.iterator();
while(iterator.hasNext()) {
ConfigAttribute configAttribute = iterator.next();
//訪問所請求資源所須要的權限
String needPermission = configAttribute.getAttribute();
System.out.println("訪問"+object.toString()+"須要的權限是:" + needPermission);
//用戶所擁有的權限authentication
Collection<? extends GrantedAuthority> authorities = authentication.getAuthorities();
for(GrantedAuthority ga : authorities) {
if(needPermission.equals(ga.getAuthority())) {
return;
}
}
}
//沒有權限
throw new AccessDeniedException(" 沒有權限訪問! ");
}
@Override
public boolean supports(ConfigAttribute attribute) {
// TODO Auto-generated method stub
return true;
}
@Override
public boolean supports(Class<?> clazz) {
// TODO Auto-generated method stub
return true;
}
}複製代碼
用戶對應的角色,和角色能訪問的資源
admin能訪問的頁面有adminPage.jsp、index.jsp;user能訪問的有index.jsp;test能訪問的有test.jsp。
先測試admin用戶:
user用戶測試:
test用戶測試:
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