其实我们的SpringSecurity和Shiro很像，我们学习的时候可以通过知识迁移来认识他。
我们先看看项目结构：
1.创建springboot项目，创建时选择导入Spring Web和Thymeleaf
2.导入jar包
pom.xml
<dependencies>
<!--
我们先看Shiro的核心三大对象
Subject 用户
SecurityManager 管理所有用户
Realm 连接数据
-->
<!-- 导入Shiro整合包-->
<dependency>
<groupId>org.apache.shiro</groupId>
<artifactId>shiro-spring</artifactId>
<version>1.4.1</version>
</dependency>
<dependency>
<groupId>org.apache.shiro</groupId>
<artifactId>shiro-core</artifactId>
<version>1.4.1</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
3.编写页面类
index.xml
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<h1>首页</h1>
<p th:text="${msg}"></p>
<a th:href="@{/user/add}">add</a> | <a th:href="@{/user/update}">update</a>
</body>
</html>
login.xml
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<h1>登陆</h1>
<hr>
<p th:text="${msg}" style="color: red"></p>
<form th:action="@{/login}">
<p>账 号：<input type="text" name="username"></p>
<p>密 码：<input type="text" name="password"></p>
<p><input type="submit"></p>
</form>
</body>
</html>
add.xml
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<h1>add</h1>
</body>
</html>
update.xml
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<h1>update</h1>
</body>
</html>
4.编写控制层
MyController.java
package com.wlm.controller;
import org.apache.shiro.SecurityUtils;
import org.apache.shiro.authc.IncorrectCredentialsException;
import org.apache.shiro.authc.UnknownAccountException;
import org.apache.shiro.authc.UsernamePasswordToken;
import org.apache.shiro.subject.Subject;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
public class MyController {
@RequestMapping({"/","/index"})
public String toIndex(Model model){
model.addAttribute("msg","hello xian_yu");
return "index";
}
@RequestMapping("/user/add")
public String add(){
return "user/add";
}
@RequestMapping("/user/update")
public String update(){
return "user/update";
}
@RequestMapping("/toLogin")
public String toLogin(){
return "login";
}
@RequestMapping("/login")
public String login(String username, String password,Model model){
//获取当前的用户
Subject subject = SecurityUtils.getSubject();
//封装用户的登陆数据
UsernamePasswordToken token = new UsernamePasswordToken(username, password);
try{
//执行登陆的方法，如果没有异常就说明可以了
subject.login(token);
return "index";
}catch (UnknownAccountException e){//用户名不存在
model.addAttribute("msg","用户名错误");
return "login";
}catch (IncorrectCredentialsException e){//密码不存在
model.addAttribute("msg","密码错误");
return "login";
}
}
}
5.编写核心类ShiroConfig.java和UserRealm.java
ShiroConfig.java
package com.wlm.config;
import org.apache.shiro.spring.web.ShiroFilterFactoryBean;
import org.apache.shiro.web.mgt.DefaultWebSecurityManager;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import java.util.LinkedHashMap;
import java.util.Map;
//加上@Configuration注解主要是给我们的类加上了cglib代理。
//在执行我们的配置类的方法时，会执行cglib代理类中的方法
@Configuration
public class ShiroConfig {
//shiroFilterFactoryBean：第三步
@Bean
public ShiroFilterFactoryBean getShiroFilterFactoryBean(@Qualifier("securityManager") DefaultWebSecurityManager defaultWebSecurityManager){
ShiroFilterFactoryBean bean = new ShiroFilterFactoryBean();
//设置安全管理器
bean.setSecurityManager(defaultWebSecurityManager);
//添加shiro的内置过滤器
/*
anon: 无需认证就可以访问
authc: 必须认证了才能访问
user: 必须拥有 记住我 功能才能用
perms: 拥有对某个资源的权限才能访问文档
role: 拥有某个角色权限才能访问
*/
Map<String, String> filterMap = new LinkedHashMap<>();
filterMap.put("/user/add","authc");
filterMap.put("/user/update","authc");
bean.setFilterChainDefinitionMap(filterMap);
//设置登陆的请求
bean.setLoginUrl("/toLogin");
return bean;
}
//DefaultWebSecurityManager：第二步
@Bean(name="securityManager")
public DefaultWebSecurityManager getdefaultWebSecurityManager(@Qualifier("userRealm") UserRealm userRealm){
DefaultWebSecurityManager securityManager = new DefaultWebSecurityManager();
//关联userRealm
securityManager.setRealm(userRealm);
return securityManager;
}
//创建realm对象：第一步
@Bean
public UserRealm userRealm(){
//需要自定义，交给spring托管
return new UserRealm();
}
}
UserRealm.java
package com.wlm.config;
import org.apache.shiro.authc.*;
import org.apache.shiro.authz.AuthorizationInfo;
import org.apache.shiro.realm.AuthorizingRealm;
import org.apache.shiro.subject.PrincipalCollection;
//自定义的 UserRealm，继承AuthorizingRealm，然后重写授权和认证方法，跟SpringSecurity很像的。
public class UserRealm extends AuthorizingRealm {
//授权
@Override
protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principalCollection) {
System.out.println("doGetAuthorizationInfo授权=》咸鱼_翻身");
return null;
}
//认证
@Override
protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken token) throws AuthenticationException {
System.out.println("doGetAuthenticationInfo认证=》咸鱼_翻身");
//用户名，密码，在数据库中取
String name = "xian_yu";
String password = "123456";
UsernamePasswordToken userToken = (UsernamePasswordToken) token;
if (!userToken.getUsername().equals(name)){
return null; //抛出我们之前写的异常 UnknownAccountException
}
//密码认证不用咱们做，交给shiro做就好了
return new SimpleAuthenticationInfo( "",password,"");
}
}
6.运行结果
首先我们能看见我们的首页，我们点进去在之后，理论上会给拦截：
我们可以看到我们直接访问add.html给拦截了：
我们提交错误信息就会显示：
那我们提交我们写好的，这里暂时模拟数据库写了账户：xian_yu 密码：123456 完成提交返回首页：
后台也打印相对应的消息，说明走了UserRealm类里面的方法：
7.这里做一个流程图帮助大家理解：
