中软国际实习day6

最新推荐文章于 2020-08-04 22:17:28 发布

原创最新推荐文章于 2020-08-04 22:17:28 发布 · 173 阅读

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本文介绍了在中软国际实习期间，通过Spring-Security框架进行用户权限管理的方法。涉及在pom.xml添加依赖，配置web.xml和spring-security.xml文件，以及在controller层的相关操作。

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权限管理

今天老师讲了Spring-Security框架，来实现用户权限管理，需要在pom.xml加入jar包，并在web.xml中加入声明，并加入spring-security.xml文件，其中，主要代码为：

pom.xml中的dependency文件：

<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>

pom.xml中的properties

 <spring.security.version>5.0.1.RELEASE</spring.security.version>

web.xml

<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>

spring-security.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
         version="3.1">

  <!-- 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>
  <listener>
    <listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
  </listener>

  <!-- 解决中文乱码过滤器 -->
  <filter>
    <filter-name>characterEncodingFilter</filter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <init-param>
      <param-name>encoding</param-name>
      <param-value>UTF-8</param-value>
    </init-param>
  </filter>
  <filter-mapping>
    <filter-name>characterEncodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>



  <!-- 前端控制器（加载classpath:spring-mvc.xml 服务器启动创建servlet） -->
  <servlet>
    <servlet-name>dispatcherServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <!-- 配置初始化参数，创建完DispatcherServlet对象，加载springmvc.xml配置文件 -->
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:spring-mvc.xml</param-value>
    </init-param>
    <!-- 服务器启动的时候，让DispatcherServlet对象创建 -->
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>dispatcherServlet</servlet-name>
    <url-pattern>*.do</url-pattern>
  </servlet-mapping>

</web-app>

LoginFilter.java

public class LoginFilter implements Filter {

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        //过滤的主要逻辑
        HttpServletRequest request = (HttpServletRequest)servletRequest;
        HttpServletResponse response = (HttpServletResponse)servletResponse;
        HttpSession session = request.getSession();
        if(session.getAttribute("userinfo") == null && request.getRequestURI().indexOf("/user/login.do") == -1){
            //未登录
            response.sendRedirect(request.getContextPath() + "user/login.do");
        }else{
            filterChain.doFilter(request, response);
        }

    }

    @Override
    public void destroy() {

    }
}

在controller层需要写：

//springSecurity的方法
    @Override
    public UserDetails loadUserByUsername(String userName) throws UsernameNotFoundException {
        UserInfo userInfo = userInfoDao.findByUserName(userName);
        List<Role> roles = roleDao.findRoleByUserId(userInfo.getId());
        System.out.println(roles);
        User user = new User(userInfo.getUsername(),
                "{noop}"+userInfo.getPassword(),
                getAuthority(roles));
        return user;
    }

    private Collection<? extends GrantedAuthority> getAuthority(List<Role> roles) {
        List<SimpleGrantedAuthority> list = new ArrayList<>();
        for(Role role:roles){
            list.add(new SimpleGrantedAuthority("ROLE_"+role.getRolename()));
        }
        return list;
    }

这样就可以实现了