springboot11-01-security入门

场景：

有3个页面：首页、登录页、登录成功后的主页面，如下图：

如果没有登录，点击“去主页”，会跳转到登录页

如果已经登录，点击“去主页”，跳转到主页，显示“hello 用户名”

下面用springboot + spring security简单实现：

1.新建maven项目，添加pom支持：

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <project xmlns="http://maven.apache.org/POM/4.0.0"
 3          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 5     <modelVersion>4.0.0</modelVersion>
 6 
 7     <groupId>com.mlxs.springboot11.security01</groupId>
 8     <artifactId>springboot11-security01</artifactId>
 9     <version>1.0-SNAPSHOT</version>
10 
11     <!--父依赖包-->
12     <parent>
13         <groupId>org.springframework.boot</groupId>
14         <artifactId>spring-boot-starter-parent</artifactId>
15         <version>1.4.2.RELEASE</version>
16         <relativePath/>
17     </parent>
18 
19     <properties>
20         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
21         <java.version>1.8</java.version>
22     </properties>
23 
24     <dependencies>
25         <dependency>
26             <groupId>org.springframework.boot</groupId>
27             <artifactId>spring-boot-starter</artifactId>
28         </dependency>
29         <!--测试-->
30         <dependency>
31             <groupId>org.springframework.boot</groupId>
32             <artifactId>spring-boot-starter-test</artifactId>
33             <scope>test</scope>
34         </dependency>
35         <!--mvc-->
36         <dependency>
37             <groupId>org.springframework.boot</groupId>
38             <artifactId>spring-boot-starter-web</artifactId>
39         </dependency>
40         <!-- security -->
41         <dependency>
42             <groupId>org.springframework.boot</groupId>
43             <artifactId>spring-boot-starter-security</artifactId>
44         </dependency>
45         <dependency>
46             <groupId>org.springframework.boot</groupId>
47             <artifactId>spring-boot-starter-thymeleaf</artifactId>
48         </dependency>
49     </dependencies>
50 </project>

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2.boot启动类

@SpringBootApplication
public class StartApp {

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

3.页面控制器类：

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

/**
 * UserController类描述:
 *
 * @author yangzhenlong
 * @since 2017/5/23
 */
@Controller
public class UserController {

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

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

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

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4.WebSecurityConfig配置类

 1 package com.mlxs.security.config;
 2 
 3 
 4 import com.mlxs.util.MD5Util;
 5 import org.springframework.beans.factory.annotation.Autowired;
 6 import org.springframework.context.annotation.Bean;
 7 import org.springframework.context.annotation.Configuration;
 8 import org.springframework.security.authentication.AuthenticationManager;
 9 import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
10 import org.springframework.security.config.annotation.web.builders.HttpSecurity;
11 import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
12 import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
13 import org.springframework.security.crypto.password.PasswordEncoder;
14 
15 /**
16  * WebSecurityConfig类描述:
17  *
18  * @author yangzhenlong
19  * @since 2017/5/18
20  */
21 @Configuration
22 @EnableWebSecurity
23 //@EnableGlobalMethodSecurity(prePostEnabled = true)//允许进入页面方法前检验
24 public class WebSecurityConfig extends WebSecurityConfigurerAdapter{
25 
26     @Bean
27     @Override
28     protected AuthenticationManager authenticationManager() throws Exception {
29         return super.authenticationManager();
30     }
31 
32     @Override
33     protected void configure(HttpSecurity httpSecurity) throws Exception {
34 
35         httpSecurity.authorizeRequests()
36                 .antMatchers("/", "/login").permitAll() //无需验证权限
37                 .anyRequest().authenticated() //其他地址的访问均需验证权限
38                 .and().formLogin().loginPage("/login").defaultSuccessUrl("/home").permitAll()//指定登录页是"/login" //登录成功后默认跳转到"/home"
39                 .and().logout().logoutSuccessUrl("/login").permitAll(); //退出登录后的默认url是"/login"
40     }
41 
42     /**
43      * 全局配置
44      * @param builder
45      * @throws Exception
46      */
47     @Autowired
48     public void configure(AuthenticationManagerBuilder builder) throws Exception {
49         builder
50                 .userDetailsService(this.myUDService())
51                 .passwordEncoder(this.passwordEncoder());
52         //或者用下面的方式，直接配置固定的用户和对应的角色
53         /*builder.inMemoryAuthentication().withUser("test").password("1234").roles("USER");
54         builder.inMemoryAuthentication().withUser("admin").password("admin").roles("ADMIN");
55         builder.inMemoryAuthentication().withUser("dba").password("root").roles("ADMIN","DBA");*/
56     }
57 
58     /**
59      * 设置用户密码的加密方式：MD5加密
60      * @return
61      */
62     @Bean
63     public PasswordEncoder passwordEncoder(){
64         PasswordEncoder pe = new PasswordEncoder() {//自定义密码加密方式
65             //加密
66             @Override
67             public String encode(CharSequence charSequence) {
68                 return MD5Util.encode((String)charSequence);
69             }
70 
71             //校验密码
72             @Override
73             public boolean matches(CharSequence charSequence, String s) {
74                 return MD5Util.encode((String)charSequence).equals(s);
75             }
76         };
77         return pe;
78     }
79 
80     /**
81      * 自定义用户服务，获取用户信息
82      * @return
83      */
84     @Bean
85     public MyUDService myUDService(){
86         return new MyUDService();
87     }
88 }

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5.MD5工具类：

 1 public class MD5Util {
 2 
 3     private static final String SALT = "test";//盐值
 4 
 5     public static String encode(String password) {
 6         password = password + SALT;
 7         MessageDigest md5 = null;
 8         try {
 9             md5 = MessageDigest.getInstance("MD5");
10         } catch (Exception e) {
11             throw new RuntimeException(e);
12         }
13         char[] charArray = password.toCharArray();
14         byte[] byteArray = new byte[charArray.length];
15 
16         for (int i = 0; i < charArray.length; i++)
17             byteArray[i] = (byte) charArray[i];
18         byte[] md5Bytes = md5.digest(byteArray);
19         StringBuffer hexValue = new StringBuffer();
20         for (int i = 0; i < md5Bytes.length; i++) {
21             int val = ((int) md5Bytes[i]) & 0xff;
22             if (val < 16) {
23                 hexValue.append("0");
24             }
25 
26             hexValue.append(Integer.toHexString(val));
27         }
28         return hexValue.toString();
29     }
30 
31     /*public static void main(String[] args) {
32         System.out.println(MD5Util.encode("admin"));
33 
34         System.out.println("是否相等：" + MD5Util.encode("admin").equals("66d4aaa5ea177ac32c69946de3731ec0"));
35     }*/
36 }

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6.用户信息服务类

 1 package com.mlxs.security.config;
 2 
 3 
 4 import org.springframework.security.core.authority.SimpleGrantedAuthority;
 5 import org.springframework.security.core.userdetails.User;
 6 import org.springframework.security.core.userdetails.UserDetails;
 7 import org.springframework.security.core.userdetails.UserDetailsService;
 8 import org.springframework.security.core.userdetails.UsernameNotFoundException;
 9 
10 import java.util.ArrayList;
11 import java.util.List;
12 
13 /**
14  * MyUDService类描述: 用户服务类，用来从读取用户信息
15  *
16  * @author yangzhenlong
17  * @since 2017/5/22
18  */
19 public class MyUDService implements UserDetailsService {
20     @Override
21     public UserDetails loadUserByUsername(String s) throws UsernameNotFoundException {
22         if(s.equals("admin")) {
23             List<SimpleGrantedAuthority> authorities = new ArrayList<SimpleGrantedAuthority>();
24             authorities.add(new SimpleGrantedAuthority("ROLE_ADMIN"));
25 
26             User user = new User("admin", "66d4aaa5ea177ac32c69946de3731ec0", authorities);//用户名和通过MD5加密后的密码
27             return user;
28         }else{
29             throw new UsernameNotFoundException("UserName " + s + " not found");
30         }
31     }
32 
33 
34 }

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启动app类，访问：http:localhost:8080

登录用户名/密码： admin / admin

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原文地址：https://www.cnblogs.com/yangzhenlong/p/6894022.html