详解spring security 配置多个AuthenticationProvider

package com.scau.equipment.config.common.security.provider;import org.springframework.security.authentication.AuthenticationProvider;import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;import org.springframework.security.core.Authentication;import org.springframework.security.core.AuthenticationException;import org.springframework.security.core.GrantedAuthority;import org.springframework.security.core.authority.SimpleGrantedAuthority;import org.springframework.security.core.userdetails.User;import org.springframework.stereotype.Component;import java.util.Arrays;import java.util.List;@Componentpublic class InMemoryAuthenticationProvider implements AuthenticationProvider {  private final String adminName = "root";  private final String adminPassword = "root";  //根用户拥有全部的权限  private final List<GrantedAuthority> authorities = Arrays.asList(new SimpleGrantedAuthority("CAN_SEARCH"),      new SimpleGrantedAuthority("CAN_SEARCH"),      new SimpleGrantedAuthority("CAN_EXPORT"),      new SimpleGrantedAuthority("CAN_IMPORT"),      new SimpleGrantedAuthority("CAN_BORROW"),      new SimpleGrantedAuthority("CAN_RETURN"),      new SimpleGrantedAuthority("CAN_REPAIR"),      new SimpleGrantedAuthority("CAN_DISCARD"),      new SimpleGrantedAuthority("CAN_EMPOWERMENT"),      new SimpleGrantedAuthority("CAN_BREED"));  @Override  public Authentication authenticate(Authentication authentication) throws AuthenticationException {    if(isMatch(authentication)){      User user = new User(authentication.getName(),authentication.getCredentials().toString(),authorities);      return new UsernamePasswordAuthenticationToken(user,authentication.getCredentials(),authorities);    }    return null;  }  @Override  public boolean supports(Class<?> authentication) {    return true;  }  private boolean isMatch(Authentication authentication){    if(authentication.getName().equals(adminName)&&authentication.getCredentials().equals(adminPassword))      return true;    else      return false;  }}