springboot中怎么利用mybatis實現枚舉映射

springboot中怎么利用mybatis實現枚舉映射，相信很多沒有經驗的人對此束手無策，為此本文總結了問題出現的原因和解決方法，通過這篇文章希望你能解決這個問題。

添加枚舉處理器

MappedTypes(value = {YesOrNo.class})public class UniversalEnumHandler<E extends Enum<E> & BaseEnum> extends BaseTypeHandler<E> { private final Class<E> type; /** * construct with parameter. */ public UniversalEnumHandler(Class<E> type) { if (type == null) {  throw new IllegalArgumentException("Type argument cannot be null"); } this.type = type; } @Override public void setNonNullParameter(PreparedStatement ps, int i, E parameter, JdbcType jdbcType)  throws SQLException { ps.setInt(i, parameter.getCode()); } @Override public E getNullableResult(ResultSet rs, String columnName) throws SQLException { int code = rs.getInt(columnName); return rs.wasNull() ? null : EnumUtils.codeOf(this.type, code); } @Override public E getNullableResult(ResultSet rs, int columnIndex) throws SQLException { int code = rs.getInt(columnIndex); return rs.wasNull() ? null : EnumUtils.codeOf(this.type, code); } @Override public E getNullableResult(CallableStatement cs, int columnIndex) throws SQLException { int code = cs.getInt(columnIndex); return cs.wasNull() ? null : EnumUtils.codeOf(this.type, code); }}

在配置文件指定處理器

mybatis-plus: typeHandlersPackage: cn.pilipa.account.cerebrum.client.enums #處理器所在包，我是把枚舉處理器放在枚舉包里

定義代表枚舉鍵值的接口

public interface BaseEnum<E extends Enum<?>, T> { public Integer getCode(); public String getText();}

定義一下枚舉

public enum YesOrNo implements BaseEnum { Yes(1, "是"), No(0, "否"); private Integer code; private String text; YesOrNo(Integer code, String text) { this.code = code; this.text = text; } @JsonCreator public static YesOrNo jsonCreate(Integer code) { return EnumUtils.codeOf(YesOrNo.class, code); } @Override public Integer getCode() { return this.code; } @Override public String getText() { return this.text; } @JsonValue public Integer getCodeStr() { return this.code; }}

在實體中定義枚舉類型字段

/** * 是否為國民. */ private YesOrNo naturalBorn;

生成的SQL語句

==> Preparing: INSERT INTO employee_info ( id, name, credit_number, status, first_time, tax_code, natural_born ) VALUES ( ?, ?, ?, ?, ?, ?, ? ) 2019-09-05 16:56:38.991 DEBUG [accounting-client,,,] 92833 --- [   main] c.p.a.c.c.m.EmployeeInfoMapper.insert : ==> Parameters: 1169534796253630466(Long), 段會濤(String), 130523199011111219(String), 1(Integer), 2019-09-05(Date), 130523199011111219(String), 0(Integer)

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