枚举类名建议带上 Enum 后缀，枚举成员名称需要全大写，单词间用下划线隔开。

说明：枚举其实就是特殊的类，域成员均为常量，且构造方法被默认强制是私有。 正例：枚举名字为 ProcessStatusEnum 的成员名称：SUCCESS / UNKNOWN_REASON。

public enum ResultEnum {
    //成功
    SUCCESS(200, "success"),
    //学校300-399
    SCHOOLCODEEXP(301, "学校代码不能为空！"),
    SCHOOLNAME(302,"学校名称不能为空"),
    SCHOOLAREA(303,"学校招生地区不能不空"),
    NULL_SUBJECTTYPE(304,"科目类别不可为空"),
    NULL_SCHOOLYEAR(305,"招生年限不可为空"),
    SUBCOLNAME(306,"学科属性不能为空"),
    ZSSFCODE(307,"招生省份编码不能为空"),
    NULL_BATCH(308,"招生批次不能为空"),
    //选科400-499
    SELECTCOURSE(401,"所选科目不能为空"),
    // 专业600-699
    NULL_PARAM_MAJOR_LEVEL(601, "参数【专业层次】不可为空") ,
    NULL_PARAM_MAJOR_CODE(602,"参数【专业代码】不可为空"),
    NULL_DISCIPLINENAME(603,"参数【专业名称】不可为空"),
    //录取批次线700-799
    NULL_PARAM_PROVINCE(701, "参数【省份】不可为空"),
    NULL_PARAM_EXAMINEE_CATEGORY(702, "参数【考生类别】不可为空"),
    //职业信息800-899
    NULL_PARAM_JOB_INFO_CODE(801,"参数【职业代码】不可为空"),
    //公共异常
    RUNEXECEPTION(500, "运行时异常"),
    PAGEEXECPTION(901, "分页参数当前页面不能为空"),
    PAGESIZEEXECPTION(902, "分页参数行数不能为空"),
    PARAMXECEPTION(903, "参数非法"),
    BIZEXECEPTION(904, "业务异常"),
    UNDEFINE(-1, "未定义异常信息");
    private int code;
    private String msg;
    ResultEnum(int code, String msg) {
        this.code = code;
        this.msg = msg;
    }
    public static String msg(int code) {
        for (ResultEnum m : ResultEnum.values()) {
            if (m.getCode() == code) {
                return m.getMsg();
            }
        }
        return UNDEFINE.getMsg();
    }
    public int getCode() {
        return code;
    }
    public void setCode(int code) {
        this.code = code;
    }
    public String getMsg() {
        return msg;
    }
    public void setMsg(String msg) {
        this.msg = msg;
    }
}

原文地址：https://www.cnblogs.com/zhangke306shdx/p/11011724.html