spring security过滤器

一、spring security过滤器的简单介绍

（1）Spring-Security对Web安全性的支持大量地依赖于Servlet过滤器。

（2）如果使用过Servlet过滤器且令其正常工作，就必须在Web应用程序的web.xml文件中使用 和元素配置它们。虽然这样做能起作用，但是它并不适用于使用依赖注入进行的配置。

（3）spring-Security过滤器在进入服务器Tomcat之后，进入Servlet之前生效

二、配置spring security过滤器

1.在pom.xml文件中输入以下代码下载spring security的架包

<dependency>
      <groupId>org.springframework.securitygroupId>
      <artifactId>spring-security-webartifactId>
      <version>${spring.security.version}version>
    dependency>
    <dependency>
      <groupId>org.springframework.securitygroupId>
      <artifactId>spring-security-configartifactId>
      <version>${spring.security.version}version>
    dependency>
    <dependency>
      <groupId>org.springframework.securitygroupId>
      <artifactId>spring-security-coreartifactId>
      <version>${spring.security.version}version>
    dependency>
    <dependency>
      <groupId>org.springframework.securitygroupId>
      <artifactId>spring-security-taglibsartifactId>
      <version>${spring.security.version}version>
    dependency>

2.在web.xml文件中配置spring security过滤器

  <filter>
    <filter-name>springSecurityFilterChainfilter-name>
    <filter-class>org.springframework.web.filter.DelegatingFilterProxyfilter-class>
  filter>
  <filter-mapping>
    <filter-name>springSecurityFilterChainfilter-name>
    <url-pattern>/*url-pattern>
  filter-mapping>

3.在resources包下创建spring-security.xml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">

    <security:global-method-security pre-post-annotations="enabled" jsr250-annotations="enabled" secured-annotations="enabled"></security:global-method-security>

    <!-- 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="true">
        <!-- 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，ROLE_USER必须有的角色" -->
        <security:intercept-url pattern="/**" access="hasAnyRole('ROLE_USER','ROLE_ADMIN')"/>

        <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"/>

        <!--退出并跳转到首页-->
        <security:logout invalidate-session="true" logout-url="/logout.do" logout-success-url="/login.jsp"></security:logout>

    </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"/>
    <!-- <bean id="webexpressionHandler" class="org.springframework.security.web.access.expression.DefaultWebSecurityExpressionHandler" />-->
    <!-- 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>

三、案例

1.bean层

（1）UserInfo

package com.zjitc.bean;

import java.util.List;

public class UserInfo {

    private int id;             //用户ID
    private String username;    //用户名
    private String password;    //用户密码

    private List<Role> roleList;

    // get/set 访问器
    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public List<Role> getRoleList() {
        return roleList;
    }

    public void setRoleList(List<Role> roleList) {
        this.roleList = roleList;
    }

    @Override
    public String toString() {
        return "UserInfo{" +
                "id=" + id +
                ", username='" + username + '\'' +
                ", password='" + password + '\'' +
                '}';
    }
}

（2）Role

package com.zjitc.bean;

public class Role {
    private int rid;
    private String rname;
    private String rdesc;
    private String sex;
    private String birthday;

    public int getRid() {
        return rid;
    }

    public void setRid(int rid) {
        this.rid = rid;
    }

    public String getRname() {
        return rname;
    }

    public void setRname(String rname) {
        this.rname = rname;
    }

    public String getRdesc() {
        return rdesc;
    }

    public void setRdesc(String rdesc) {
        this.rdesc = rdesc;
    }

    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }

    public String getBirthday() {
        return birthday;
    }

    public void setBirthday(String birthday) {
        this.birthday = birthday;
    }

    public Role() {
    }

    public Role(int rid, String rname, String rdesc, String sex, String birthday) {
        this.rid = rid;
        this.rname = rname;
        this.rdesc = rdesc;
        this.sex = sex;
        this.birthday = birthday;
    }

    @Override
    public String toString() {
        return "Role{" +
                "rid=" + rid +
                ", rname='" + rname + '\'' +
                ", rdesc='" + rdesc + '\'' +
                ", sex='" + sex + '\'' +
                ", birthday='" + birthday + '\'' +
                '}';
    }
}

2.Dao层

（1）IUserInfoDao

package com.zjitc.dao;

import com.zjitc.bean.UserInfo;

import java.util.List;

// IUserInfoDao - 接口，数据库访问层，直接可以访问数据库
public interface IUserInfoDao {
    // 查询全部用户
    List<UserInfo> findAll(Integer page,Integer size);
}

（2）IRoleDao

package com.zjitc.dao;

import com.zjitc.bean.Role;

import java.util.List;

public interface IRoleDao {
    // 查询全部角色
    List<Role> findAllRole(Integer page , Integer size);
    // 通过用户ID查找该用户下的角色
    List<Role> findRoleByUserId(int uid);
}

3.mapper

（1）UserInfoMapper.xml

<mapper namespace="com.zjitc.dao.IUserInfoDao">

    <select id="findAll"  resultType="com.zjitc.bean.UserInfo">
        select * from tb_user
    select>
mapper>

（2）RoleMapper.xml

<mapper namespace="com.zjitc.dao.IRoleDao">
    <select id="findAllRole"  resultType="com.zjitc.bean.Role">
        select * from tb_role
    select>

    <select id="findRoleByUserId"  parameterType="Integer" resultType="com.zjitc.bean.Role">
        select * from tb_role where rid in(select rid from tb_user_role where uid=#{uid})
    select>
mapper>

4.Service层

（1）

• 接口IUserInfoService

package com.zjitc.service;

import com.zjitc.bean.UserInfo;
import org.springframework.security.core.userdetails.UserDetailsService;

import java.util.List;

public interface IUserInfoService extends UserDetailsService {
    List<UserInfo> findAll(Integer page,Integer size);
}

• 实现类

package com.zjitc.service.impl;

import com.github.pagehelper.PageHelper;
import com.zjitc.bean.Role;
import com.zjitc.bean.UserInfo;
import com.zjitc.dao.IRoleDao;
import com.zjitc.dao.IUserInfoDao;
import com.zjitc.service.IUserInfoService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.GrantedAuthority;
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 javax.annotation.Resource;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

@Service("userService")
public class UserInfoServiceImpl implements IUserInfoService {
    @Autowired
    private IUserInfoDao userInfoDao;
    @Autowired
    private IRoleDao roleDao;
    
    @Override
    public List<UserInfo> findAll(Integer page,Integer size) {
        PageHelper.startPage(page,size);
        return userInfoDao.findAll(page,size);
    }

    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        // 根据姓名查询当前登录的用户
        UserInfo userInfo = userInfoDao.doLogin(username);
        // 根据当前登录的用户ID，去查询到所属的角色
        List<Role> roleList = roleDao.findRoleByUserId(userInfo.getId());
        userInfo.setRoleList(roleList);
        // 得到想要的信息之后，就要交给Security去处理了
        User user = new User(userInfo.getUsername(),"{noop}" + userInfo.getPassword(),getAuthority(roleList));
        return user;
    }

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

（2）

• 接口

package com.zjitc.service;

import com.zjitc.bean.Role;

import java.util.List;

public interface IRoleService {
    List<Role> findAllRole(Integer page , Integer size);
}

• 实现类

package com.zjitc.service.impl;

import com.github.pagehelper.PageHelper;
import com.zjitc.bean.Role;
import com.zjitc.dao.IRoleDao;
import com.zjitc.service.IRoleService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Controller;
import org.springframework.stereotype.Repository;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class RoleServiceImpl implements IRoleService {
    @Autowired
    private IRoleDao roleDao;

    @Override
    public List<Role> findAllRole(Integer page , Integer size) {
        PageHelper.startPage(page,size);
        return roleDao.findAllRole(page,size);
    }
}

5.Controller层

（1）UserInfoController

package com.zjitc.controller;

import com.github.pagehelper.PageInfo;
import com.zjitc.bean.UserInfo;
import com.zjitc.service.IUserInfoService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpSession;
import java.io.IOException;
import java.util.List;

@Controller
@RequestMapping("/user")
public class UserInfoController {
    @Autowired
    private IUserInfoService userInfoService;
    
//    全部查询
//    所有需要返回数据到页面显示的全部都需要封装到ModelAndView中
    @RequestMapping("/findAll.do")
    public ModelAndView findAll(@RequestParam(defaultValue = "1") Integer page,
                                @RequestParam(defaultValue = "5") Integer size){
        List<UserInfo> userInfoList = userInfoService.findAll(page,size);
        PageInfo pageInfo = new PageInfo(userInfoList);
        ModelAndView mv = new ModelAndView();
        mv.addObject("pageInfo",pageInfo);
        mv.setViewName("user-list");
        return mv;
    }
}

（2）RoleController

package com.zjitc.controller;

import com.github.pagehelper.PageInfo;
import com.zjitc.bean.Role;
import com.zjitc.service.IRoleService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.ModelAndView;

import java.util.List;

@Controller
@RequestMapping("/role")
public class RoleController {
    @Autowired private IRoleService roleService;

    @RequestMapping("/findAllRole.do")
    public ModelAndView findAll(@RequestParam(defaultValue = "1") Integer page,
                                @RequestParam(defaultValue = "5") Integer size){
        List<Role> roleList = roleService.findAllRole(page,size);
        // 创建出分页的内置对象，将查询到的List数据传到对象中
        PageInfo pageInfo = new PageInfo(roleList);
        ModelAndView mv = new ModelAndView();
        mv.addObject("pageInfo",pageInfo);
        mv.setViewName("role-list");
        return mv;
    }
}

6.JSP页面

<%--  access="hasRole('显示该链接必须要有的角色')"  --%>
<security:authorize access="hasRole('ADMIN')">
	<a href="${pageContext.request.contextPath}/user/findAll.dopage=1&size=5"> 
		<i class="fa fa-circle-o">i> 用户管理
	a>
security:authorize>