Spring Security介绍
    Spring Security是一个功能强大且可高度自定义的身份验证和访问控制框架。它是保护基于Spring的应用程序的框架。
    Spring Security是一个专注于为Java应用程序提供身份验证和授权的框架。与所有Spring项目一样，Spring Security的真正强大之处在于它可以轻松扩展以满足自定义要求

    • springboot版本 2.1.8 接下来的演示都采用的最新的SpringBoot的版本
    1. 导入pom文件 引入springsecurity的依赖
    1. <?xml version="1.0" encoding="UTF-8"?>
    2. <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    3.          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    4.     <modelVersion>4.0.0</modelVersion>
    5.     <parent>
    6.         <groupId>org.springframework.boot</groupId>
    7.         <artifactId>spring-boot-starter-parent</artifactId>
    8.         <version>2.1.8.RELEASE</version>
    9.         <relativePath/> <!-- lookup parent from repository -->
    10.     </parent>
    11.     <groupId>com.example</groupId>
    12.     <artifactId>spring_security</artifactId>
    13.     <version>0.0.1-SNAPSHOT</version>
    14.     <name>spring_security</name>
    15.     <description>Demo project for Spring Boot</description>
    17.     <properties>
    18.         <java.version>1.8</java.version>
    19.     </properties>
    21.     <dependencies>
    22.         <dependency>
    23.             <groupId>org.springframework.boot</groupId>
    24.             <artifactId>spring-boot-starter-web</artifactId>
    25.         </dependency>
    27.         <dependency>
    28.             <groupId>org.springframework.boot</groupId>
    29.             <artifactId>spring-boot-starter-test</artifactId>
    30.             <scope>test</scope>
    31.         </dependency>
    32.         <dependency>
    33.             <groupId>org.projectlombok</groupId>
    34.             <artifactId>lombok</artifactId>
    35.             <optional>true</optional>
    36.         </dependency>
    37.         <dependency>
    38.             <groupId>org.springframework.boot</groupId>
    39.             <artifactId>spring-boot-starter-freemarker</artifactId>
    40.         </dependency>
    41.         <dependency>
    42.             <groupId>org.springframework.boot</groupId>
    43.             <artifactId>spring-boot-starter-security</artifactId>
    44.         </dependency>
    45.     </dependencies>
    47.     <build>
    48.         <plugins>
    49.             <plugin>
    50.                 <groupId>org.springframework.boot</groupId>
    51.                 <artifactId>spring-boot-maven-plugin</artifactId>
    52.             </plugin>
    53.         </plugins>
    54.     </build>
    56. </project>

    配置application.yml

    server:
  port: 8080
spring:
  freemarker:
    enabled: true
    cache: false
    template-loader-path: classpath:/templates/
    suffix: .html
  security:
    user:
      name: user
      password: user
      roles: user,admin

    编写 hello.html login.html hello页面为展示页面 login页面为 登录界面

    <!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>helloworld</title>
</head>
<body>
        第一个Security应用
</body>
</html>

    编写helloworld控制层

    @Controller
public class HelloWorld {

    @RequestMapping(value = "/hello")
    public String hello(){
        return "hello";
    }
}

    在这个时候我们可以在地址栏输入http://localhost:8080/hello
    页面跳转到了security的默认配置页
    SpringSecurity之Hello-World - 图1
    输入yml文件配置的用户名和密码
    SpringSecurity之Hello-World - 图2