部分引自 www.javaboy.org
比如MD5，但MD5不是很安全，因为他们采加密时，相同的密码产生的密文都是一样的，并不是特别安全，所以可以给密码加一些盐，相同的密码加一些盐，“味道”又不一样了，盐可以采取随机数、用户名或其他方式，但始终要维护一个盐字段，在Security中给我提供了另一种手段（BCryptPasswordEncoder），令相同的密码差生的密文每次都是不一样的

我们启动一个单元测试产生一些密文

@RunWith(SpringRunner.class)
@SpringBootTest
public class SecurityApplicationTests {

    @Test
    public void contextLoads() {
        BCryptPasswordEncoder bc = new BCryptPasswordEncoder();
        for (int i = 0; i < 10; i++) {
            System.out.println(bc.encode("123"));
        }
    }

}

image.png

修改SecurityConfig

@Configuration
public class SecurityConfig extends WebSecurityConfigurerAdapter {
    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.inMemoryAuthentication()
                .withUser("yzn").password("$2a$10$WuUO9k/3LfTGzMEAKxNtAenttd9ulTq7wTj17ojqbU44Q5rwN/mWu").roles("admin")
                .and()
                .withUser("test").password("$2a$10$WuUO9k/3LfTGzMEAKxNtAenttd9ulTq7wTj17ojqbU44Q5rwN/mWu").roles("user");
    }

    @Bean
    PasswordEncoder passwordEncoder(){
        return new BCryptPasswordEncoder();
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.authorizeRequests()
                .antMatchers("/admin/**").hasRole("admin")
                .antMatchers("/user/**").hasAnyRole("admin", "user")
                .anyRequest().authenticated()
                .and()
                .formLogin()
                // 登录处理接口
                .loginProcessingUrl("/doLogin")
                // 定义登录页面，未登录时，访问一个需要登录之后才能访问的接口，会自动跳转到该页面
                .loginPage("/login")
                //定义登录时，用户名的 key，默认为 username
                .usernameParameter("uname")
                //定义登录时，用户密码的 key，默认为 password
                .passwordParameter("passwd")
                //登录成功的处理器
                .successHandler(new AuthenticationSuccessHandler() {
                    @Override
                    public void onAuthenticationSuccess(HttpServletRequest req, HttpServletResponse res, Authentication authentication) throws IOException, ServletException {
                        res.setContentType("application/json;charset=utf-8");
                        PrintWriter out = res.getWriter();
                        Map<String,Object> map = new HashMap();
                        map.put("status", 200);
                        // authentication.getPrincipal() 可以把登录者信息取出来
                        map.put("msg", authentication.getPrincipal());
                        out.write(new ObjectMapper().writeValueAsString(map));
                        out.flush();
                    }
                })
                .failureHandler(new AuthenticationFailureHandler() {
                    @Override
                    public void onAuthenticationFailure(HttpServletRequest req, HttpServletResponse res, AuthenticationException e) throws IOException, ServletException {
                        res.setContentType("application/json;charset=utf-8");
                        PrintWriter out = res.getWriter();
                        Map<String,Object> map = new HashMap();
                        map.put("status", 200);
                        map.put("msg", "failed");
                        out.write(new ObjectMapper().writeValueAsString(map));
                        out.flush();
                    }
                })
                //和表单登录相关的接口统统都直接通过
                .permitAll()
                .and()
                .logout()
                .logoutUrl("/logout")
                .logoutSuccessHandler(new LogoutSuccessHandler() {
                    @Override
                    public void onLogoutSuccess(HttpServletRequest req, HttpServletResponse res, Authentication authentication) throws IOException, ServletException {
                        res.setContentType("application/json;charset=utf-8");
                        PrintWriter out = res.getWriter();
                        Map<String,Object> map = new HashMap();
                        map.put("status", 200);
                        map.put("msg", "注销登录成功");
                        out.write(new ObjectMapper().writeValueAsString(map));
                        out.flush();
                    }
                })
                .and()
                .csrf().disable();
    }
}

测试是否可以登录