部分引自 www.javaboy.org
比如MD5，但MD5不是很安全，因?yàn)樗麄儾杉用軙r(shí)，相同的密碼產(chǎn)生的密文都是一樣的，并不是特別安全，所以可以給密碼加一些鹽，相同的密碼加一些鹽，“味道”又不一樣了，鹽可以采取隨機(jī)數(shù)、用戶名或其他方式，但始終要維護(hù)一個(gè)鹽字段，在Security中給我提供了另一種手段（BCryptPasswordEncoder），令相同的密碼差生的密文每次都是不一樣的

我們啟動(dòng)一個(gè)單元測試產(chǎn)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()
                // 登錄處理接口
                .loginProcessingUrl("/doLogin")
                // 定義登錄頁面，未登錄時(shí)，訪問一個(gè)需要登錄之后才能訪問的接口，會(huì)自動(dòng)跳轉(zhuǎn)到該頁面
                .loginPage("/login")
                //定義登錄時(shí)，用戶名的 key，默認(rèn)為 username
                .usernameParameter("uname")
                //定義登錄時(shí)，用戶密碼的 key，默認(rèn)為 password
                .passwordParameter("passwd")
                //登錄成功的處理器
                .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() 可以把登錄者信息取出來
                        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();
                    }
                })
                //和表單登錄相關(guān)的接口統(tǒng)統(tǒng)都直接通過
                .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", "注銷登錄成功");
                        out.write(new ObjectMapper().writeValueAsString(map));
                        out.flush();
                    }
                })
                .and()
                .csrf().disable();
    }
}

測試是否可以登錄