【JavaEE---作业】对外提供密码学算法服务器软件系统

大概划分

1、domain 实体类

Account

package person.hyy.domain;

public class Account {
   
    Integer id;
    String username;
    String password;

    public Account() {
   
    }

    public Account(Integer id, String username, String password) {
   
        this.id = id;
        this.username = username;
        this.password = password;
    }

    public Integer getId() {
   
        return id;
    }

    public void setId(Integer id) {
   
        this.id = id;
    }

    public String getUsername() {
   
        return username;
    }

    public void setUsername(String username) {
   
        this.username = username;
    }

    public String getPassword() {
   
        return password;
    }

    public void setPassword(String password) {
   
        this.password = password;
    }
}

2、dao 数据库持久层

AccountDao

package person.hyy.dao;

import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;
import org.springframework.stereotype.Repository;
import person.hyy.domain.Account;

import java.util.List;

@Mapper
@Repository
public interface AccountDao {
   
    /*登录*/
    @Select("select * from account where username=#{username} and password=#{password}")
    List<Account> findByUsernamePassword(Account account);

    /*注册之前检验是否用户名重复*/
    @Select("SELECT username FROM account WHERE account.username=#{username}")
    String check(Account account);

    /*注册*/
    @Insert("INSERT into account(username,password) VALUES (#{username},#{password})")
    int addAccount(Account account);

}

3、service层 业务模块逻辑应用

以下都是接口
AccountService

package person.hyy.service;

public interface AccountService {
   
    /*登录*/
    public boolean validateAccount(String username,String password);
    /*注册*/
    public boolean addAccount(String username,String password);
    /*检查用户名是否重复*/
    public boolean checkAccount(String username);
}

CaesarService

package person.hyy.service;

public interface CaesarService {
   
    //加密
    public String encryption(String clearText, String key);

    //解密
    public String decode(String unClearText,String key);
}

DESService

package person.hyy.service;

public interface DESService {
   
    //加密
    public String encryption(String clearText, String userKey);

    //解密
    /*public String decode(String unClearText,String userKey);*/
}

FenceService

package person.hyy.service;

public interface FenceService {
   
    //加密
    public String encode(String clearText);


    //解密
    public String decode(String unclearText);
}

实际方法
AccountServiceImpl

package person.hyy.service.impl;


import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import person.hyy.dao.AccountDao;
import person.hyy.domain.Account;
import person.hyy.service.AccountService;

import java.util.List;

@Service("accountService")
public class AccountServiceImpl implements AccountService {
   
    @Autowired
    AccountDao accountDao;

    /*检验是否该账户，若是，则登录成功*/
    public boolean validateAccount(String username,String password){
   
        Account account = new Account();
        account.setUsername(username);
        account.setPassword(password);
        List<Account> accountList = accountDao.findByUsernamePassword(account);
        if(accountList.isEmpty()){
   
            return false;
        }else {
   
            return true;
        }
    }

    /*注册*/
    public boolean addAccount(String username,String password){
   
        Account account = new Account();
        account.setUsername(username);
        account.setPassword(password);
        int i = accountDao.addAccount(account);
        if(i!=0){
   
            return true;
        }else {
   
            return false;
        }

    }

    /*注册时检查用户名是否重复*/
    @Override
    public boolean checkAccount(String username) {
   
        Account account = new Account();
        account.setUsername(username);
        String check = accountDao.check(account);
        if(check == null){
   
            return true; //为空，即没有重复名
        }else {
   
            return false; //为真，即有重复名
        }

    }


}

CaesarServiceImpl

package person.hyy.service.impl;

import org.springframework.stereotype.Service;
import person.hyy.service.CaesarService;

@Service("caesarService")
public class CaesarServiceImpl implements CaesarService {
   

    //加密（输入  明文+密钥）
    @Override
    public String encryption(String clearText, String key) {
   
        int j =Integer.valueOf(key).intValue();//获得偏移量(密钥)
        //加密字符串
        StringBuffer sb = new StringBuffer(" ");
        char b[];
        char ch=' ';
        b=clearText.toCharArray();
        for(int i=0;i<clearText.length();i++){
   
            if(b[i]>='a' && b[i]<='z'){
   
                ch=(char)((b[i]-'a'+j)%26+'a');
            }
            if(b[i]>='A' && b[i]<='Z'){
   
                ch=(char)((b[i]-'A'+j)%26+'A');
            }
            sb.append(ch);
        }
        return String.valueOf(sb);
    }

    //解密（输入  密文+密钥）
    @Override
    public String decode(String unClearText, String key) {
   
        int j =Integer.valueOf(key).intValue();//获得偏移量
        //加密字符串
        StringBuffer sb = new StringBuffer("");
        char b[];
        char ch=' ';
        b=unClearText.toCharArray();
        for(int i=0;i<unClearText.length();i++){
   
            if(b[i]>='a' && b[i]<='z'){
   
                ch=(char)((b[i]-'a'+26-j)%26+'a');
            }
            if(b[i]>='A' && b[i]<='Z'){
   
                ch=(char)((b[i]-'A'+26-j)%26+'A');
            }
            sb.append(ch);
        }
        return String.valueOf(sb);
    }
}

DESServiceImpl

package person.hyy.service.impl;

import com.sun.org.apache.xerces.internal.impl.dv.util.Base64;
import jdk.nashorn.internal.ir.debug.ClassHistogramElement;
import org.springframework.stereotype.Service;
import person.hyy.service.DESService;

import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.SecretKeySpec;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;

@Service("DESService")
public class DESServiceImpl implements DESService {
   

    /*DES加密*/
    @Override
    public String encryption(String clearText, String userKey) {
   
        //根据给定的字节数组构建一个密钥
        String plainText = clearText; //明文
        String originKey = userKey;  //原始密钥

        SecretKeySpec key = new SecretKeySpec(originKey.getBytes(),"DES");

            //1.获取加密算法工具类
        Cipher cipher = null;
        try {
   
            cipher = Cipher.getInstance("DES");
        } catch (NoSuchAlgorithmException e) {
   
            e.printStackTrace();
        } catch (NoSuchPaddingException e) {
   
            e.printStackTrace();
        }
        //2.对工具类对象进行初始化
            //mode 加密/解密模式
            //key  对原始密钥处理之后的密钥
        try {
   
            cipher.init(Cipher.ENCRYPT_MODE,key);
        } catch (InvalidKeyException e) {
   
            e.printStackTrace();
        }
        //3.用加密工具类对象 对明文进行加密
        byte[] encipherByte = new byte[0];
        try {
   
            encipherByte = cipher.doFinal(plainText.getBytes());
        } catch (IllegalBlockSizeException e) {
   
            e.printStackTrace();
        } catch (BadPaddingException e) {
   
            e.printStackTrace();
        }
        //4.防止乱码，使用Base64编码
            String encode = Base64.encode(encipherByte);

        return encode;
    }

    /*DES解密*/
  /*  @Override
    public String decode(String unClearText,String userKey) {
        String originKey = userKey;  //原始密钥
        String encode = unClearText; //密文

        //获取加密算法工具类
        Cipher cipher = null;