@Alias("SecretField")
public class SecretField {
}

@MappedTypes(SecretField.class)
public class SecretFieldTypeHandler extends BaseTypeHandler<String> {
    private static final Logger log = LoggerFactory.getLogger(SecretFieldTypeHandler.class);
    @Override
    public void setNonNullParameter(PreparedStatement ps, int i, String parameter, JdbcType jdbcType) throws SQLException {
        try {
            if (StringUtils.hasText(parameter)) {
                String encryptStr = Sm4Util.encryptData_ECB(parameter);
                ps.setString(i, encryptStr);
            }
        } catch (Exception e) {
            ps.setString(i, parameter);
            log.error("mybatis加密參數(shù)異常，i:{},parameter:{}", i, parameter);
        }
    }
    @Override
    public String getNullableResult(ResultSet rs, String columnName) throws SQLException {
        String columnValue = rs.getString(columnName);
        try {
            if (StringUtils.hasText(columnValue)) {
                columnValue = Sm4Util.decryptData_ECB(columnValue);
            }
        } catch (Exception e) {
            log.error("mybatis解密參數(shù)異常，columnName:{}, columnValue:{}", columnName, columnValue);
        }
        return columnValue;
    }
    @Override
    public String getNullableResult(ResultSet rs, int columnIndex) throws SQLException {
        return null;
    }
    @Override
    public String getNullableResult(CallableStatement cs, int columnIndex) throws SQLException {
        return null;
    }
}

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE configuration PUBLIC "-//mybaties.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <settings>
    </settings>
    <typeAliases>
            <typeAlias type="com.banxian.mybatis.alias.SecretField" alias="SecretField"/>
    </typeAliases>
    <typeHandlers>
        <typeHandler handler="com.banxian.mybatis.typehandler.SecretFieldTypeHandler" />
    </typeHandlers>
</configuration>

    <resultMap id="BaseResultMap" type="User">
        <result column="sfz" property="sfz"  javaType="SecretField"/>
    </resultMap>

   insert into ... values(...
    <if test="sfz!= null">
        #{sfz,jdbcType=VARCHAR,javaType=SecretField},
    </if>
   )

mybatis-plus:
  global-config:
    db-config:
      logic-delete-field: deleted
      logic-not-delete-value: "0"
      logic-delete-value: "1"
  mapper-locations: "classpath*:/mapper/**/*.xml"
  configuration:
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
  type-handlers-package: com.banxian.mybatis.typehandler
  type-aliases-package: com.banxian.mybatis.alias

@Data
@TableName(autoResultMap = true)
public class User implements Serializable {
    private static final long serialVersionUID = 4344848828462926573L;
    @TableId(value = "id", type = IdType.ASSIGN_ID)
    private Integer id;
    /**
     * 名稱(chēng)
     */
    private String userName;
    /**
     * 是否刪除 1：是  0：否
     */
    @TableLogic
    private String deleted;
    /**
     * 是否有效 1：是  0：否
     */
    private String valid;
    /**
     * 創(chuàng)建時(shí)間
     */
    @TableField(value = "create_at", fill = FieldFill.INSERT)
    private LocalDateTime createAt;
    /**
     * 更新時(shí)間
     */
    @TableField(value = "update_at", fill = FieldFill.INSERT_UPDATE)
    private LocalDateTime updateAt;
    @TableField(value = "sfz", typeHandler = SecretFieldTypeHandler.class)
    private String sfz;
}