Spring security工作流程及集成

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A user enters their username and password into a login screen and clicks a login button. The entered information is placed into an object called Authentication which is passed to the AuthenticationManager’s authenticate method. this method will loop through all AuthenticationProviders that are configured and calls their authenticate method, passing in the Authentication object. Each AuthenticationProvider will calls its configured UserDetailsService’s loadUserByUserName method.

1. spring-security.xml配置文件如下所示：

等同于下面的注解

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter { @Autowired
public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception {
auth.inMemoryAuthentication().withUser("mkyong").password("123456").roles("USER");
auth.inMemoryAuthentication().withUser("admin").password("123456").roles("ADMIN");
auth.inMemoryAuthentication().withUser("dba").password("123456").roles("DBA");
} @Override
protected void configure(HttpSecurity http) throws Exception { http.authorizeRequests()
.antMatchers("/admin/**").access("hasRole('ROLE_ADMIN')")
.antMatchers("/dba/**").access("hasRole('ROLE_ADMIN') or hasRole('ROLE_DBA')")
.and().formLogin(); }
}

其中，@EnableWebSecurity等同于配置文件spring-security.xml

2. web.xml集成spring-security

<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>
/WEB-INF/spring-security.xml
</param-value>
</context-param> 
<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>

相同功能的注解实现：

import org.springframework.security.web.context.AbstractSecurityWebApplicationInitializer;public class SpringSecurityInitializer extends AbstractSecurityWebApplicationInitializer {
//do nothing
}

其中，AbstractSecurityWebApplicationInitializer的实现类自动加载springSecurityFilterChain

3. spring.xml配置文件

<context:component-scan base-package="com.test.web.*" /><bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix">
<value>/WEB-INF/pages/</value>
</property>
<property name="suffix">
<value>.jsp</value>
</property>
</bean>

相同功能的注解：

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.view.InternalResourceViewResolver;
import org.springframework.web.servlet.view.JstlView;@EnableWebMvc
@Configuration
@ComponentScan({ "com.test.web.*" })
@Import({ SecurityConfig.class })
public class AppConfig { @Bean
public InternalResourceViewResolver viewResolver() {
InternalResourceViewResolver viewResolver
= new InternalResourceViewResolver();
viewResolver.setViewClass(JstlView.class);
viewResolver.setPrefix("/WEB-INF/pages/");
viewResolver.setSuffix(".jsp");
return viewResolver;
}}

4. spring DispatcherServlet配置

<servlet>
<servlet-name>mvc-dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>mvc-dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>

等同功能的注解

import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;
import com.mkyong.config.AppConfig;public class SpringMvcInitializer
extends AbstractAnnotationConfigDispatcherServletInitializer { @Override
protected Class<?>[] getRootConfigClasses() {
return new Class[] { AppConfig.class };
} @Override
protected Class<?>[] getServletConfigClasses() {
return null;
} @Override
protected String[] getServletMappings() {
return new String[] { "/" };
}}

参考文献：

【1】http://stackoverflow.com/questions/23088004/spring-security-workflow

【2】http://www.mkyong.com/tutorials/spring-security-tutorials/

【3】http://www.mkyong.com/spring-security/spring-security-hello-world-annotation-example/