枚举类支持 
1.枚举类要求 
xbatis 支持枚举作为参数进行进行CRUD;要求一下:
1. 普通枚举,以名字存储(继承 Serializable) 
2. 非普通枚举,自定义属性存储(继承 EnumSupport) 
java
public enum TestEnum implements EnumSupport<String> {
    X1("a1"),X2("a2");
    TestEnum(String code){
        this.code=code;
    }
    private final String code;
    @Override
    public String getCode() {
        return this.code;
    }枚举类如何使用 
1:新增 
java
@Table
@Data
public class DefaultValueTest {
    @TableId
    private Integer id;
    @TableField(defaultValue = "{BLANK}")
    private String value1;
    @TableField(defaultValue = "1", updateDefaultValue = "2")
    private Integer value2;
    @TableField(defaultValue = "{NOW}")
    private LocalDateTime createTime;
    private TestEnum value3;
}java
DefaultValueTestMapper mapper = session.getMapper(DefaultValueTestMapper.class);
DefaultValueTest defaultValueTest = new DefaultValueTest();
defaultValueTest.setValue3(TestEnum.X1);
mapper.save(defaultValueTest);2:枚举类查询 
java
QueryChain.of(mapper)
.in(DefaultValueTest::getValue1,Arrays.asList(TestEnum.X1,TestEnum.X2))
.list();把它看成普通的参数即可,用户和 int string 都是一样的
