0、pom

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.3.0.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>
	<groupId>com.jack</groupId>
	<artifactId>demo</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>war</packaging>
	<name>demo</name>
	<description>Demo project for Spring Security</description>

	<properties>
		<java.version>1.8</java.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-security</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-tomcat</artifactId>
			<scope>provided</scope>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
			<exclusions>
				<exclusion>
					<groupId>org.junit.vintage</groupId>
					<artifactId>junit-vintage-engine</artifactId>
				</exclusion>
			</exclusions>
		</dependency>
		<dependency>
			<groupId>org.springframework.security</groupId>
			<artifactId>spring-security-test</artifactId>
			<scope>test</scope>
		</dependency>
	</dependencies>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>

</project>

1、SpringSecurityConfig（security配置）

// 手動定義使用者認證 和 // 關聯使用者Service認證 二者取一

這裡測試用的是 手動定義使用者認證！！！

package com.jack.demo;

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.builders.WebSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;

/**
 * @program: demo
 * @description: Security 配置
 * @author: Jack.Fang
 * @date:2020-06-01 1541
 **/

@Configuration
@EnableWebSecurity
public class SpringSecurityConfig extends WebSecurityConfigurerAdapter {

  @Autowired
  private MyUserService myUserService;

  @Override
  protected void configure(AuthenticationManagerBuilder auth) throws Exception {
    // 手動定義使用者認證
    auth.inMemoryAuthentication().passwordEncoder(new BCryptPasswordEncoder()).withUser("admin").password(new BCryptPasswordEncoder().encode("123456")).roles("ADMIN");
    auth.inMemoryAuthentication().passwordEncoder(new BCryptPasswordEncoder()).withUser("jack").password(new BCryptPasswordEncoder().encode("fang")).roles("USER");

    // 關聯使用者Service認證
    //auth.userDetailsService(myUserService).passwordEncoder(new MyPasswordEncoder());

    // 預設jdbc認證
    // auth.jdbcAuthentication().usersByUsernameQuery("").authoritiesByUsernameQuery("").passwordEncoder(new MyPasswordEncoder());
  }

  @Override
  protected void configure(HttpSecurity http) throws Exception {
    http.authorizeRequests()
        .antMatchers("/").permitAll()
        .anyRequest().authenticated()
        .and()
        .logout().permitAll()
        .and()
        .formLogin();
    http.csrf().disable();
  }

  @Override
  public void configure(WebSecurity web) throws Exception {
    web.ignoring().antMatchers("/js/**","/css/**","/image/**");
  }
}

2、MyPasswordEncoder（自定義密碼比較）

package com.jack.demo;

import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;

/**
 * @program: demo
 * @description: 密碼加密
 * @author: Jack.Fang
 * @date:2020-06-01 1619
 **/
public class MyPasswordEncoder implements PasswordEncoder {

  @Override
  public String encode(CharSequence charSequence) {
    return new BCryptPasswordEncoder().encode(charSequence.toString());
  }

  @Override
  public boolean matches(CharSequence charSequence,String s) {
    return new BCryptPasswordEncoder().matches(charSequence,s);
  }
}

3、MyUserService（自行實現的使用者登入介面）

具體內容 省略。這裡測試用的是SpringSecurityConfig手動新增使用者名稱與密碼。

package com.jack.demo;

import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Component;

/**
 * @program: demo
 * @description: 使用者
 * @author: Jack.Fang
 * @date:2020-06-01 1617
 **/
@Component
public class MyUserService implements UserDetailsService {

  @Override
  public UserDetails loadUserByUsername(String s) throws UsernameNotFoundException {
    return null;
  }
}

4、啟動類（測試）

DemoApplication.java

package com.jack.demo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.security.access.prepost.PostAuthorize;
import org.springframework.security.access.prepost.PostFilter;
import org.springframework.security.access.prepost.PreAuthorize;
import org.springframework.security.access.prepost.PreFilter;
import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity;
import org.springframework.security.core.userdetails.User;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@EnableGlobalMethodSecurity(prePostEnabled = true)
@RestController
@SpringBootApplication
public class DemoApplication {

	public static void main(String[] args) {
		SpringApplication.run(DemoApplication.class,args);
	}

	@RequestMapping("/")
	public String index(){
		return "hello Spring Security!";
	}

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

	@PreAuthorize("hasRole('ROLE_ADMIN')")
	@RequestMapping("/roleAdmin")
	public String role() {
		return "admin auth";
	}


	@PreAuthorize("#id<10 and principal.username.equals(#username) and #user.username.equals('abc')")
	@PostAuthorize("returnObject%2==0")
	@RequestMapping("/test")
	public Integer test(Integer id,String username,User user) {
		// ...
		return id;
	}

	@PreFilter("filterObject%2==0")
	@PostFilter("filterObject%4==0")
	@RequestMapping("/test2")
	public List<Integer> test2(List<Integer> idList) {
		// ...
		return idList;
	}
}

測試hello介面（http://localhost:8080/hello）

未登入跳轉登入頁

登入SpringSecurityConfig配置的admin賬號與密碼123456
成功呼叫hello

測試roleAdmin（登入admin 123456成功，登入jack fang訪問則失敗）

登出 logout

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