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MyBatis-Plus如何实现自动加密解密

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0919

这篇文章主要介绍了MyBatis-Plus实现自动加密解密方式，具有很好的参考价值，希望对大家有所帮助。如有错误或未考虑完全的地方，望不吝赐教

MyBatis-Plus 自动加密解密

通过使用MyBatis的typeHandler功能，对入参和出参进行处理，实现无缝加密解密（将明文加密后保存至数据库；从数据库读取时，自动将密文解密成明文）

实现TypeHandler

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@Slf4j
public class UserTypeHandler extends BaseTypeHandler<Object> {
    /**
     * 非空字段加密
     * @param preparedStatement
     * @param i
     * @param parameter
     * @param jdbcType
     * @throws SQLException
     */
    @Override
    public void setNonNullParameter(PreparedStatement preparedStatement, int i, Object parameter, JdbcType jdbcType) {
        try {
            if (StrUtil.isBlank((String) parameter)) {
                return;
            }
            // todo 加密操作
            String encrypt = "";
            preparedStatement.setString(i, encrypt);
        } catch (Exception e) {
            log.error("typeHandler加密异常：" + e);
        }
    }
    /**
     * 非空字段解密
     * @param resultSet
     * @param columnName
     * @return
     * @throws SQLException
     */
    @Override
    public Object getNullableResult(ResultSet resultSet, String columnName) throws SQLException {
        String col = resultSet.getString(columnName);
        try {
            if (StrUtil.isBlank(col)) {
                return col;
            }
            // todo 对结果col进行解密操作
            return "";
        } catch (Exception e) {
            log.error("typeHandler解密异常：" + e);
        }
        return col;
    }
    /**
     * 可空字段加密
     * @param resultSet
     * @param columnIndex
     * @return
     * @throws SQLException
     */
    @Override
    public Object getNullableResult(ResultSet resultSet, int columnIndex) throws SQLException {
        String col = resultSet.getString(columnIndex);
        try {
            if (StrUtil.isBlank(col)) {
                return col;
            }
            // todo 对结果col进行解密操作
            return "";
        } catch (Exception e) {
            log.error("typeHandler解密异常：" + e);
        }
        return col;
    }
    /**
     * 可空字段解密
     * @param callableStatement
     * @param columnIndex
     * @return
     * @throws SQLException
     */
    @Override
    public Object getNullableResult(CallableStatement callableStatement, int columnIndex) throws SQLException {
        String col = callableStatement.getString(columnIndex);
        try {
            if (StrUtil.isBlank(col)) {
                return col;
            }
            // todo 对结果col进行解密操作
            return "";
        } catch (Exception e) {
            log.error("typeHandler解密异常：" + e);
        }
        return col;
    }
}

添加注解

在对应的实体类中

  • 在 @TableName 注解中，设置 autoResultMap 参数为true
  • 在需要加解密的字段上，添加注解 @TableField(typeHandler = UserTypeHandler.class)
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@Data
@TableName(value = "t_user", autoResultMap = true)
public class UserEntity {
    /**
     * 主键自增
     */
    @TableId(type = IdType.AUTO)
    private Integer id;
    private String name;
    private Integer age;
    @TableField(typeHandler = UserTypeHandler.class)
    private String password;
    private String role;
}

查询加密字段

MyBatis-Plus的QueryWrapper在查询加密字段时，并不会进入TypeHandler，需要手写sql，指定字段进行TypeHandler中的流程。

注解方式

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@Results(id= "resultMap", value = {
    @Result(column = "password", property = "password", typeHandler = UserTypeHandler.class)
})
@Select("select * from t_user where password = #{password, typeHandler=com.mybatisdemo.config.UserTypeHandler}")
List<UserEntity> list(UserQuery userQuery);

XML方式

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<resultMap id="userMap" type="com.mybatisdemo.entity.UserEntity">
    <result column="password" property="password" typeHandler="com.mybatisdemo.config.UserTypeHandler" />
</resultMap>
<select id="list" resultMap="userMap">
    select * from t_user where password = #{password,typeHandler=com.mybatisdemo.config.UserTypeHandler}
</select>

MyBatis-Plus 敏感数据的加密

最近在做项目，需要实现对身份证,密码等敏感数据的加密，即不能以明文存储密码到数据库。

上网查了一下资料，解决办法如下：

写加密解密的工具类

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import org.apache.commons.codec.binary.Base64;
import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
public class AES {
    // 密钥
    public static String key = "AD42F6697B035B7580E4FEF93BE20BAD";
    private static String charset = "utf-8";
    // 偏移量
    private static int offset = 16;
    private static String transformation = "AES/CBC/PKCS5Padding";
    private static String algorithm = "AES";
    /**
     * 加密
     *
     * @param content
     * @return
     */
    public static String encrypt(String content) {
        return encrypt(content, key);
    }
    /**
     * 解密
     *
     * @param content
     * @return
     */
    public static String decrypt(String content) {
        return decrypt(content, key);
    }
    /**
     * 加密
     *
     * @param content 需要加密的内容
     * @param key     加密密码
     * @return
     */
    public static String encrypt(String content, String key) {
        try {
            SecretKeySpec skey = new SecretKeySpec(key.getBytes(), algorithm);
            IvParameterSpec iv = new IvParameterSpec(key.getBytes(), 0, offset);
            Cipher cipher = Cipher.getInstance(transformation);
            byte[] byteContent = content.getBytes(charset);
            cipher.init(Cipher.ENCRYPT_MODE, skey, iv);// 初始化
            byte[] result = cipher.doFinal(byteContent);
            return new Base64().encodeToString(result); // 加密
        } catch (Exception e) {
            // LogUtil.exception(e);
        }
        return null;
    }
    /**
     * AES（256）解密
     *
     * @param content 待解密内容
     * @param key     解密密钥
     * @return 解密之后
     * @throws Exception
     */
    public static String decrypt(String content, String key) {
        try {
            SecretKeySpec skey = new SecretKeySpec(key.getBytes(), algorithm);
            IvParameterSpec iv = new IvParameterSpec(key.getBytes(), 0, offset);
            Cipher cipher = Cipher.getInstance(transformation);
            cipher.init(Cipher.DECRYPT_MODE, skey, iv);// 初始化
            byte[] result = cipher.doFinal(new Base64().decode(content));
            return new String(result); // 解密
        } catch (Exception e) {
            //LogUtil.exception(e);
        }
        return null;
    }
    public static void main(String[] args) throws Exception {
        String s = "hello world";
        // 加密
        System.out.println("加密前：" + s);
        String encryptResultStr = encrypt(s);
        System.out.println("加密后：" + encryptResultStr);
        // 解密
        System.out.println("解密后：" + decrypt(encryptResultStr));
    }
}

继承BaseTypeHandler ，实现对数据的转换

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import org.apache.ibatis.type.BaseTypeHandler;
import org.apache.ibatis.type.JdbcType;
import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
/**
 * @author starmark
 * @date 19-12-17  下午8:38
 */
public class AESEncryptHandler extends BaseTypeHandler {
    @Override
    public void setNonNullParameter(PreparedStatement ps, int i, Object parameter, JdbcType jdbcType) throws SQLException {
        ps.setString(i, AES.encrypt((String)parameter));
    }
    @Override
    public String getNullableResult(ResultSet rs, String columnName) throws SQLException {
        String columnValue = rs.getString(columnName);
        return AES.decrypt(columnValue);
    }
    @Override
    public String getNullableResult(ResultSet rs, int columnIndex) throws SQLException {
        String columnValue = rs.getString(columnIndex);
        return AES.decrypt(columnValue);
    }
    @Override
    public String getNullableResult(CallableStatement cs, int columnIndex)
            throws SQLException {
        String columnValue = cs.getString(columnIndex);
        return AES.decrypt(columnValue);
    }
}

有po类中，实现相关类型注解

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/**
 * 用户管理
 */
@Data
@EqualsAndHashCode(callSuper = false)
@TableName(autoResultMap = true)
public class SysOrgUser extends BaseUpdateModel {
    /**
     * 登陆帐户
     */
    private String loginName;
    /**
     * 密码
     */
    @TableField(typeHandler = AESEncryptHandler.class)
    private String password;

至此，密码等敏感信息已处理好。

以上为个人经验，希望能给大家一个参考，也希望大家多多支持米米素材网。

原文链接：https://blog.csdn.net/YW_Danny/article/details/120031966