我正在尝试注册一个像这样的自定义 json marshaller
JSON.createNamedConfig("dynamic",{
def m = new CustomJSONSerializer()
JSON.registerObjectMarshaller(Idf, 1, { instance, converter -> m.marshalObject(instance, converter) })
})
and then using it like this
JSON.use("dynamic"){
render inventionList as JSON
}
但我不确定是否正在使用我的自定义序列化程序,因为我在调试时
控制永远不会去
marshalObject
我的自定义序列化程序的功能我的自定义序列化程序如下
import grails.converters.deep.JSON
import java.beans.PropertyDescriptor
import java.lang.reflect.Field
import java.lang.reflect.Method
import org.codehaus.groovy.grails.web.converters.exceptions.ConverterException
import org.codehaus.groovy.grails.web.converters.marshaller.json.GroovyBeanMarshaller
import org.codehaus.groovy.grails.web.json.JSONWriter
class CustomJSONSerializer extends GroovyBeanMarshaller{
public boolean supports(Object object) {
return object instanceof GroovyObject;
}
public void marshalObject(Object o, JSON json) throws ConverterException {
JSONWriter writer = json.getWriter();
println 'properties '+BeanUtils.getPropertyDescriptors(o.getClass())
for(PropertyDescriptor property:BeanUtils.getProperyDescriptors(o.getClass())){
println 'property '+property.getName()
}
try {
writer.object();
for (PropertyDescriptor property : BeanUtils.getPropertyDescriptors(o.getClass())) {
String name = property.getName();
Method readMethod = property.getReadMethod();
if (readMethod != null && !(name.equals("metaClass")) && readMethod.getName()!='getSpringSecurityService') {
Object value = readMethod.invoke(o, (Object[]) null);
writer.key(name);
json.convertAnother(value);
}
}
for (Field field : o.getClass().getDeclaredFields()) {
int modifiers = field.getModifiers();
if (Modifier.isPublic(modifiers) && !(Modifier.isStatic(modifiers) || Modifier.isTransient(modifiers))) {
writer.key(field.getName());
json.convertAnother(field.get(o));
}
}
writer.endObject();
}
catch (ConverterException ce) {
throw ce;
}
catch (Exception e) {
throw new ConverterException("Error converting Bean with class " + o.getClass().getName(), e);
}
}
}
是否可以调试序列化程序?如果不是,那么如何从序列化中排除属性?有一些属性会在序列化过程中引发异常。
最佳答案
这是我在 Bootstrap init 闭包中为自定义 JSON 编码(marshal)处理所做的:
def init = {servletContext ->
grailsApplication.domainClasses.each {domainClass ->
domainClass.metaClass.part = {m ->
def map = [:]
if (m.'include') {
m.'include'.each {
map[it] = delegate."${it}"
}
} else if (m.'except') {
m.'except'.addAll excludedProps
def props = domainClass.persistentProperties.findAll {
!(it.name in m.'except')
}
props.each {
map['id'] = delegate.id
map[it.name] = delegate."${it.name}"
}
}
return map
}
}
JSON.registerObjectMarshaller(Date) {
return it?.format("dd.MM.yyyy")
}
JSON.registerObjectMarshaller(User) {
def returnArray = [:]
returnArray['username'] = it.username
returnArray['userRealName'] = it.userRealName
returnArray['email'] = it.email
return returnArray
}
JSON.registerObjectMarshaller(Role) {
def returnArray = [:]
returnArray['authority'] = it.authority
return returnArray
}
JSON.registerObjectMarshaller(Person) {
return it.part(except: ['fieldX', 'fieldY'])
}}
你看到我有日期、使用、人员和角色类的自定义编码器
关于json - 如何在 grails 中注册自定义 json marshaller,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/10188643/