[utils] Get the EnumUtil tool class of the enumeration through a field value in the enumeration

Sometimes we encounter this situation, we have the value of one of the fields of the enumeration, and then obtain the information of the enumeration or other fields through this value. If there is no tool class, we need to add the corresponding method to each enumeration , Through the method of the tool class, the amount of code can be reduced, which is more concise and beautiful

Create an interface CommonEnum

/**
 * 枚举接口
 */
public interface CommonEnum {
    //此处对应枚举的字段,如状态枚举StatusEnum定义了code,name,desc
    //那么这里定义这个三个字段的get方法,可以获取到所有的字段
    int getCode();

    String getName();

    String getDesc();

}

enum implements this interface

/**
 * 状态枚举
 */
public enum StatusEnum implements CommonEnum {

    WAITTING(0, "WAITTING", "等待"),
    STARTED(1, "STARTED", "开始"),
    END(2, "END", "结束");

    private int code;
    private String name;
    private String desc;

    StatusEnum(int code, String name, String desc) {
        this.code = code;
        this.name = name;
        this.desc = desc;
    }

    @overwrite
    public int getCode() {
        return code;
    }

    public void setCode(int code) {
        this.code = code;
    }

    @overwrite
    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    @overwrite
    public String getDesc() {
        return desc;
    }

    public void setDesc(String desc) {
        this.desc = desc;
    }

}

Tool class EnumUtil

/**
 * 枚举工具类
 */
public class EnumUtil {

    /**
     * 返回指定编码的'枚举'
     * @param code
     * @return SharedObjTypeEnum
     * @throws
     */
    public static <T extends CommonEnum> T getEnumBycode(Class<T> clazz, int code) {
        for(T _enum : clazz.getEnumConstants())
            if(code == _enum.getCode())
                return _enum;
        return null;
    }

    /**
     * 返回指定名称的'枚举'
     * @param name
     * @return SharedObjTypeEnum
     * @throws
     */
    public static <T extends CommonEnum> T getEnumByName(Class<T> clazz, String name) {
        for(T _enum : clazz.getEnumConstants())
            if(_enum.getCode().equals(name))
                return _enum;
        return null;
    }

    /**
     * 返回指定描述的'枚举'
     * @param desc
     * @return SharedObjTypeEnum
     * @throws
     */
    public static <T extends CommonEnum> T getEnumByDesc(Class<T> clazz, String desc) {
        for(T _enum : clazz.getEnumConstants())
            if(_enum.getCode().equals(desc))
                return _enum;
        return null;
    }
}

Instructions

StatusEnum statusEnum = EnumUtil.getEnumBycode(StatusEnum.class, 1);

StatusEnum statusEnum = EnumUtil.getEnumByName(StatusEnum.class, "END");

StatusEnum statusEnum = EnumUtil.getEnumByDesc(StatusEnum.class, "开始");