JSON 构造器类，可以将Java对象映射为JSON对象
}

/**
* 返回一个JSON简单对象
* @return javascript 简单对象
*/
private String encodeEmpty() {
return "{}";
}

/**
* 将Java对象转化为JSON对象
* @param object Java对象
* @return 如果适配器能解析,则返回解析后的JSON对象，否则返回一个默认Empty JSON对象
*/
private String encodeAdapter(Object object) {
try {
Map<String, Object> proxy = new HashMap<String, Object>();
Class clazz = object.getClass();
if (clazz == null) {
throw new IllegalArgumentException("No bean class specified");
}
proxy.put("class", clazz.getName());
PropertyDescriptor[] descriptors = null;
try {
descriptors = Introspector.getBeanInfo(clazz).getPropertyDescriptors();
} catch (IntrospectionException e) {
descriptors = new PropertyDescriptor[;
}
for (int i = j = descriptors.length; i < j; i++) {
PropertyDescriptor descriptor = descriptors[i];
String key = descriptor.getName();
//排除的字段
if (excludeFields.contains(key)) {
continue;
}
Method method = descriptor.getReadMethod();
if (descriptor.getReadMethod() != null) {
Class<?> type = descriptor.getPropertyType();

if (type.isEnum()) {
continue;
}
Object value = method.invoke(object, EMPTY_OBJECT_ARRAY);
proxy.put(key, value);
}
}
return encodeMap(proxy);
} catch (Exception ex) {
return encodeEmpty();
}
}
}

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