规范使用枚举类
public enum StatEnum {
SUCCESS(1,"成功"),
END(0,"失败"),
REPEAT_KILL(-1,"重复"),
INNER_ERROR(-2,"系统异常"),
DATA_REWRITE(-3,"数据异常");
private int state;
private String stateInfo;
StatEnum(int state, String stateInfo) {
this.state = state;
this.stateInfo = stateInfo;
}
public int getState() {
return state;
}
public String getStateInfo() {
return stateInfo;
}
public static StatEnum stateOf(int index){
for(StatEnum state: values()){
if(state.getState() == index){
return state;
}
}
return null;
}
}
枚举搭配接口一起使用
// 定义接口
public interface CodeEnum {
Integer getCode();
String getMessage();
}
// 定义枚举
public enum StatusEnum implements CodeEnum {
UP(0, "成功"),
DOWN(1, "失败");
private Integer code;
private String message;
StatusEnum(Integer code, String message) {
this.code = code;
this.message = message;
}
@Override
public Integer getCode() {
return code;
}
@Override
public String getMessage() {
return message;
}
}
// 定义工具类
public class EnumUtil {
public static <T extends CodeEnum> T getByCode(Integer code, Class<T> enumClass) {
for (T each: enumClass.getEnumConstants()) {
if (code.equals(each.getCode())) {
return each;
}
}
return null;
}
}
使用：
EnumUtil.getByCode(0, StatusEnum.class).getMessage()EnumUtil.getByCode(1, StatusEnum.class).getCode()