Struts2.0的不同版本针对枚举转换器应用

???? Struts2.0 的Apache项目中从Struts2.1.0开始不再支持枚举类型的自动转换，所以项目中枚举转换采用自己开发扩展的枚举转换器：不再支持的主要原因为：

?? @deprecated Since Struts 2.1.0 as enum support is now built into XWork

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?从Struts 2.1.0 开始采用不再支持枚举类型XWork 框架

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本人重点讲述：

Struts2.1.0的枚举转换器的：

如下：

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@Deprecated public class EnumTypeConverter extends DefaultTypeConverter {

??? /**
???? * Converts the given object to a given type. How this is to be done is implemented in toClass. The OGNL context, o
???? * and toClass are given. This method should be able to handle conversion in general without any context or object
???? * specified.
???? *
???? * @param context - OGNL context under which the conversion is being done
???? * @param o?????? - the object to be converted
???? * @param toClass - the class that contains the code to convert to enumeration
???? * @return Converted value of type declared in toClass or TypeConverter.NoConversionPossible to indicate that the
???? *???????? conversion was not possible.
???? */
??? @Override
??? public Object convertValue(Map<String, Object> context, Object o, Class toClass) {
??????? if (o instanceof String[]) {
??????????? return convertFromString(((String[]) o)[0], toClass);
??????? } else if (o instanceof String) {
??????????? return convertFromString((String) o, toClass);
??????? }

??????? return super.convertValue(context, o, toClass);
??? }

??? /**
???? * Converts one or more String values to the specified class.
???? * @param value - the String values to be converted, such as those submitted from an HTML form
???? * @param toClass - the class to convert to
???? * @return the converted object
???? */
??? public java.lang.Enum convertFromString(String value, Class toClass) {
??????? return Enum.valueOf(toClass, value);
??? }

}

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Struts2.1.0以后创建自定义的枚举扩展类：不过采用StrutsTypeConverter

public class GenericEnumConverter extends StrutsTypeConverter ：

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public Object convertFromString(Map context, String[] values, Class toClass) ：

public String convertToString(Map context, Object o) ：方法

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同时在需要的枚举类型时在全局转换器xwork-conversion.properties中配置：

自定义枚举类型类全路径=自定义枚举转换器

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