JAVA中定义常量的3种方式

//未处理
public static final int PROCESS_STATUS_UNTREATED = 0;
//已接收
public static final int PROCESS_STATUS_ACCPECTED = 1;
//已处理
public static final int PROCESS_STATUS_PROCESSED = 2;

public static final class PROCESS_STATUS{
//未处理
public static final int UNTREATED = 0;
//已接收
public static final int ACCPECTED = 1;
//已处理
public static final int PROCESSED = 2;
}

public interface KeyValueEnum{
Object getCode();
Object getDesc();
}

public static enum PROCESS_STATUS implements KeyValueEnum{
UNTREATED(0,"未处理"),
ACCPECTED(1,"已接收"),
PROCESSED(2,"已处理");
private Integer code;
private String desc;
private PROCESS_STATUS(Integer key , String value){
this.code = key;
this.desc = value;
}
@Override
public Integer getCode() {
return code;
}

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

//获取编码
PROCESS_STATUS.UNTREATED.getCode();
//获取描述
PROCESS_STATUS.UNTREATED.getDes();

public static <T extends Enum<T> & KeyValueEnum>  String getEnumValue(Class<T> clazz ,
Object codeValue) {
String result = null;
T[] enums = clazz.getEnumConstants();
for(T obj : enums){
if(obj.getCode().equals(codeValue)){
result = String.valueOf(obj.getDesc());
break;
}
}
return result;
}