Spring Security使用多种加密方式进行密码校验的代码示例

package com.example;

import org.apache.commons.codec.digest.DigestUtils;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.DelegatingPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;

import java.util.HashMap;
import java.util.Map;

public class PasswordCheckExample {

  /**
   * 代理类
   */
  private static final PasswordEncoder PASSWORDENCODER;

  static {
    String defaultEncodeId = "bcrypt";
    PasswordEncoder md5 = new DigestMD5PasswordEncoder();

    Map<String, PasswordEncoder> encoders = new HashMap<>();
    encoders.put(defaultEncodeId, new BCryptPasswordEncoder());
    encoders.put("MD5", md5);

    DelegatingPasswordEncoder passwordEncoder = new DelegatingPasswordEncoder(defaultEncodeId, encoders);
    passwordEncoder.setDefaultPasswordEncoderForMatches(md5);

    PASSWORDENCODER = passwordEncoder;
  }

  public static void main(String[] args) {
    // 用户输入的明文密码
    String rawPassword = "123123";

    // 从数据库中读取的已加密的密码
    String encodedPassword = "{bcrypt}$2a$10$S9DHL4DrdO/zhJPM34lm..5CChFbmLThSPdOqweyVh6LLQG73ZeNa"; // 示例密文

    // 验证密码，返回 true 表示匹配，false 表示不匹配
    boolean matches = PASSWORDENCODER.matches(rawPassword, encodedPassword);
    System.out.println("密码匹配结果: " + matches);
  }

  /**
   * PasswordEncoder - MD5
   */
  private static class DigestMD5PasswordEncoder implements PasswordEncoder {

    @Override
    public String encode(CharSequence rawPassword) {
      return DigestUtils.md5Hex((String) rawPassword);
    }

    @Override
    public boolean matches(CharSequence rawPassword, String encodedPassword) {
      return encodedPassword.equals(encode(rawPassword));
    }
  }
}

private static final PasswordEncoder PASSWORDENCODER;
static {
  String defaultEncodeId = "bcrypt";
  PasswordEncoder md5 = new DigestMD5PasswordEncoder();

  Map<String, PasswordEncoder> encoders = new HashMap<>();
  encoders.put(defaultEncodeId, new BCryptPasswordEncoder());
  encoders.put("MD5", md5);

  DelegatingPasswordEncoder passwordEncoder = new DelegatingPasswordEncoder(defaultEncodeId, encoders);
  passwordEncoder.setDefaultPasswordEncoderForMatches(md5);

  PASSWORDENCODER = passwordEncoder;
}

     String encodedPassword = "{bcrypt}$2a$10$S9DHL4DrdO/zhJPM34lm..5CChFbmLThSPdOqweyVh6LLQG73ZeNa"; // 示例密文

     boolean matches = PASSWORDENCODER.matches(rawPassword, encodedPassword);
     System.out.println("密码匹配结果: " + matches);
   }

  private static class DigestMD5PasswordEncoder implements PasswordEncoder {

    @Override
    public String encode(CharSequence rawPassword) {
      return DigestUtils.md5Hex((String) rawPassword);
    }

    @Override
    public boolean matches(CharSequence rawPassword, String encodedPassword) {
      return encodedPassword.equals(encode(rawPassword));
    }
  }