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问题描述

我正在寻找一种通过Grails JSON转换进行字符串格式化的方法,类似于自定义格式日期,我在

类似这样的内容:

$ b $返回特定日期格式的json-in-grails b

  import grails.converters.JSON; 

class BootStrap {

def init = {servletContext - >
JSON.registerObjectMarshaller(String){
返回它?.trim()}
}
def destroy = {
}
}

我知道自定义格式可以在每个域类的基础上完成,但我正在寻找更全面的解决方案。 / p>

解决方案

尝试创建使用特定格式的属性名称或类的自定义编码器。

  class CustomDtoObjectMarshaller实现ObjectMarshaller< JSON> {

String [] excludedProperties = ['metaClass']

public boolean supports(Object object){
返回对象instanceof GroovyObject;
}

public void marshalObject(Object o,JSON json)throws ConverterException {
JSONWriter writer = json.getWriter();
尝试{
writer.object(); (PropertyDescriptor属性:BeanUtils.getPropertyDescriptors(o.getClass())){
String name = property.getName();
方法readMethod = property.getReadMethod();
if(readMethod!= null&&!(excludedProperties中的名称)){
Object value = readMethod.invoke(o,(Object [])null);
if(value!= null){
writer.key(name);
json.convertAnother(value);


$ b 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(使用类转换Bean时出错+ o.getClass()。getName(),e);
}
}

}



注册在bootstrap:

  CustomDtoObjectMarshaller customDtoObjectMarshaller = new CustomDtoObjectMarshaller()
customDtoObjectMarshaller.excludedProperties = [ 'metaClass','class']
JSON.registerObjectMarshaller(customDtoObjectMarshaller)

在我的示例我只是scip'metaClass'和'class'字段。我认为最常见的方式是

I am looking for a way to do some string formatting through Grails JSON conversion, similar to custom formatting dates, which I found in this post.

Something like this:

import grails.converters.JSON;

class BootStrap {

     def init = { servletContext ->
         JSON.registerObjectMarshaller(String) {
            return it?.trim()             }
     }
     def destroy = {
     }
}

I know custom formatting can be done on a per domain class basis, but I am looking for a more global solution.

解决方案

Try to create custom marshaller that use specific formatting for property names or class. Just look at the marshaller bellow and modify it:

class CustomDtoObjectMarshaller implements ObjectMarshaller<JSON>{

String[] excludedProperties=['metaClass']

public boolean supports(Object object) {
    return object instanceof GroovyObject;
}

public void marshalObject(Object o, JSON json) throws ConverterException {
    JSONWriter writer = json.getWriter();
    try {
        writer.object();
        for (PropertyDescriptor property : BeanUtils.getPropertyDescriptors(o.getClass())) {
            String name = property.getName();
            Method readMethod = property.getReadMethod();
            if (readMethod != null && !(name in excludedProperties)) {
                Object value = readMethod.invoke(o, (Object[]) null);
                if (value!=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);
    }
}

}

The register in bootstrap:

CustomDtoObjectMarshaller customDtoObjectMarshaller=new CustomDtoObjectMarshaller()
    customDtoObjectMarshaller.excludedProperties=['metaClass','class']
    JSON.registerObjectMarshaller(customDtoObjectMarshaller)

In my example I just scip 'metaClass' and 'class' fields. I think the most common way

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08-20 17:51