import com.thoughtworks.xstream.converters.basic.DoubleConverter; //导入依赖的package包/类
protected void setupConverters() {
    registerConverter(new ReflectionConverter(mapper, reflectionProvider), PRIORITY_VERY_LOW);

    registerConverter(new SerializableConverter(mapper, reflectionProvider, classLoaderReference), PRIORITY_LOW);
    registerConverter(new ExternalizableConverter(mapper, classLoaderReference), PRIORITY_LOW);

    registerConverter(new NullConverter(), PRIORITY_VERY_HIGH);
    registerConverter(new IntConverter(), PRIORITY_NORMAL);
    registerConverter(new FloatConverter(), PRIORITY_NORMAL);
    registerConverter(new DoubleConverter(), PRIORITY_NORMAL);
    registerConverter(new LongConverter(), PRIORITY_NORMAL);
    registerConverter(new ShortConverter(), PRIORITY_NORMAL);
    registerConverter((Converter)new CharConverter(), PRIORITY_NORMAL);
    registerConverter(new BooleanConverter(), PRIORITY_NORMAL);
    registerConverter(new ByteConverter(), PRIORITY_NORMAL);

    registerConverter(new StringConverter(), PRIORITY_NORMAL);
    registerConverter(new StringBufferConverter(), PRIORITY_NORMAL);
    registerConverter(new StringBuilderConverter(), PRIORITY_NORMAL);
    registerConverter(new ThrowableConverter(converterLookup), PRIORITY_NORMAL);
    registerConverter(new StackTraceElementConverter(), PRIORITY_NORMAL);
    registerConverter(new DateConverter(), PRIORITY_NORMAL);
    registerConverter(new GregorianCalendarConverter(), PRIORITY_NORMAL);
    registerConverter(new RegexPatternConverter(), PRIORITY_NORMAL);
    registerConverter(new CurrencyConverter(), PRIORITY_NORMAL);
    registerConverter(new CharsetConverter(), PRIORITY_NORMAL);
    registerConverter(new LocaleConverter(), PRIORITY_NORMAL);
    registerConverter(new BitSetConverter(), PRIORITY_NORMAL);
    registerConverter(new UUIDConverter(), PRIORITY_NORMAL);
    registerConverter(new URIConverter(), PRIORITY_NORMAL);
    registerConverter(new URLConverter(), PRIORITY_NORMAL);
    registerConverter(new BigIntegerConverter(), PRIORITY_NORMAL);
    registerConverter(new BigDecimalConverter(), PRIORITY_NORMAL);

    registerConverter(new ArrayConverter(mapper), PRIORITY_NORMAL);
    registerConverter(new CharArrayConverter(), PRIORITY_NORMAL);
    registerConverter(new CollectionConverter(mapper), PRIORITY_NORMAL);
    registerConverter(new MapConverter(mapper), PRIORITY_NORMAL);
    registerConverter(new TreeMapConverter(mapper), PRIORITY_NORMAL);
    registerConverter(new TreeSetConverter(mapper), PRIORITY_NORMAL);
    registerConverter(new SingletonCollectionConverter(mapper), PRIORITY_NORMAL);
    registerConverter(new SingletonMapConverter(mapper), PRIORITY_NORMAL);
    registerConverter(new PropertiesConverter(), PRIORITY_NORMAL);
    registerConverter((Converter)new EncodedByteArrayConverter(), PRIORITY_NORMAL);
    registerConverter(new EnumConverter(), PRIORITY_NORMAL);
    registerConverter(new EnumSetConverter(mapper), PRIORITY_NORMAL);
    registerConverter(new EnumMapConverter(mapper), PRIORITY_NORMAL);

    registerConverter(new FileConverter(), PRIORITY_NORMAL);
    if (JVM.isSQLAvailable()) {
        registerConverter(new SqlTimestampConverter(), PRIORITY_NORMAL);
        registerConverter(new SqlTimeConverter(), PRIORITY_NORMAL);
        registerConverter(new SqlDateConverter(), PRIORITY_NORMAL);
    }
    registerConverter(new DynamicProxyConverter(mapper, classLoaderReference), PRIORITY_NORMAL);
    registerConverter(new JavaClassConverter(classLoaderReference), PRIORITY_NORMAL);
    registerConverter(new JavaMethodConverter(classLoaderReference), PRIORITY_NORMAL);
    registerConverter(new JavaFieldConverter(classLoaderReference), PRIORITY_NORMAL);
    if (JVM.isAWTAvailable()) {
        registerConverter(new FontConverter(mapper), PRIORITY_NORMAL);
        registerConverter(new ColorConverter(), PRIORITY_NORMAL);
        registerConverter(new TextAttributeConverter(), PRIORITY_NORMAL);
    }
    if (JVM.isSwingAvailable()) {
        registerConverter(new LookAndFeelConverter(mapper, reflectionProvider), PRIORITY_NORMAL);
    }

    if (JVM.loadClassForName("javax.security.auth.Subject") != null) {
        registerConverterDynamically("com.thoughtworks.xstream.converters.extended.SubjectConverter",
            PRIORITY_NORMAL, new Class[]{Mapper.class}, new Object[]{mapper});
    }
    if (JVM.loadClassForName("javax.xml.datatype.Duration") != null) {
        registerConverterDynamically("com.thoughtworks.xstream.converters.extended.DurationConverter",
            PRIORITY_NORMAL, null, null);
    }

    registerConverter(new SelfStreamingInstanceChecker(converterLookup, this), PRIORITY_NORMAL);
}