Grails字符串枚举？

Question

假设我有这个枚举:

public enum MyEnum {
    AUSTRALIA_SYDNEY ("Australia/Sydney"),
    AUSTRALIA_ADELAIDE ("Australia/Adelaide"),

    private String name

    private Timezone(String name){
        this.name = name
    }

    public String value() {
        name
    }

    String toString() {
        name
    }
}

有没有办法让我使用其值/名称获取枚举？现在,我正在尝试这样做,但它不起作用:

MyEnum.valueOf("Australia/Sydney")

What I'm getting from the DB is a string (in this case: "Australia/Sydney"), and not the value, and unfortunately, I can't just alter the type it returns because its an old system and I'm just connecting to this DB that is shared by multiple apps. Anyway around this?

Answer 1

Add the following to your enum:

static MyEnum valueOfName( String name ) {
    values().find { it.name == name }
}

Then, you can call:

MyEnum.valueOfName( "Australia/Adelaide" )

Answer 2

为了完整性添加到以前的答案,这里有其他选项,结合了Haki先生引用的帖子.这个答案来自Amit Jain的博客文章:http: //www.intelligrape.com/blog/groovy-few-ways-to-convert-string-into-enum/

enum AccountType {
     CHECKING,
     SAVING
}

assert AccountType.CHECKING == "CHECKING" as AccountType

assert AccountType.CHECKING == AccountType.valueOf("CHECKING")
def className = AccountType.class
assert AccountType.CHECKING == Enum.valueOf(className, "CHECKING")

assert AccountType.CHECKING == AccountType["CHECKING"]
String type = "CHECKING"
assert AccountType.CHECKING == AccountType[type]