背景：

        创建一个简单的枚举类，里面添加一个查询枚举的方法

package com.ruoyi.qghp.enums;

import java.util.HashMap;
import java.util.Map;

public enum ApprovaCommentsEnum {


    // 定义四个枚举实例
    PROJECT_NAME("项目名称","projectName"),
    UNIT("填表单位","unit"),
    PROJECT_CODE("项目代码","projectCode"),
    APPLICATION("填表人","application");
    private final String name;

    private final String value;

    private ApprovaCommentsEnum(String name,String value) {
        this.name = name;
        this.value = value;
    }

    public String getName() {
        return name;
    }

    public String getValue() {
        return value;
    }

    private static  Map<String,String> allEnum = new HashMap();


    public static  String getEnumValue(String name) {
        if (allEnum == null || allEnum.size() <= 0){
            for (ApprovaCommentsEnum enumValue : ApprovaCommentsEnum.values()) {
                allEnum.put(enumValue.getName(),enumValue.getValue());
            }
        }

        return allEnum.get(name);
    }

    public static void main(String[] args) {

        System.out.println(ApprovaCommentsEnum.getEnumValue("填表人"));
        System.out.println(ApprovaCommentsEnum.getEnumValue("填表人1"));
    }
}

结果：