接著第2篇

（1）將WebSecurityConfig修改為

package com.example.chenweb1.config;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
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.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.NoOpPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;

@Configuration
@EnableWebSecurity // 註解開啟Spring Security的功能
//WebSecurityConfigurerAdapter:重寫它的方法來設定一些web的安全西街
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {

  /*  @Bean
    public static NoOpPasswordEncoder passwordEncoder() {
        return (NoOpPasswordEncoder) NoOpPasswordEncoder.getInstance();
    }
    */
    @Bean
    public PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder();
    }
    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
                .authorizeRequests()  //定義哪些url需要保護，哪些url不需要保護
                .antMatchers("/chen", "/message/").permitAll()    //定義不需要認證就可以訪問
                .anyRequest().authenticated()
                .and()
                .formLogin()
                .loginPage("/login")  //定義當需要使用者登入時候，轉到的登入頁面
                .permitAll()
                .and()
                .logout()
                .permitAll();
        http.csrf().disable();
        http.formLogin().defaultSuccessUrl("/index");
    }
    @Autowired
    public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception {
        BCryptPasswordEncoder passwordEncoder =new BCryptPasswordEncoder();
        String password = passwordEncoder.encode("111");
        auth
                .inMemoryAuthentication()
            //    .withUser("user").password("111").roles("USER");
                .withUser("user").password(password).roles("USER");
        //在記憶體中建立了一個使用者，該使用者的名稱為user，密碼為password，使用者角色為USER
    }
}

（2）啟動後輸入user  ，密碼111