JSON-将对象转换为JSON数组

Question

i try to convert a class object which are generated via Reflection and convert them to JSON string. following is my methods

public Object creatObjectAsString(String className) {
    Object objects = null;
    try {
        objects = java.lang.reflect.Array.newInstance( Class.forName(className), 1);
        //System.out.println(objects.toString());
    } catch (ClassNotFoundException e) {
        e.printStackTrace();
    }
    return objects ;
}
public String convertPlainObjectToJSON( Object obj,boolean isArray){
    String jsonString="",tempJSON="";
    JSONSerializer serializer = new JSONSerializer();
    tempJSON = serializer.serialize(obj);
    if(isArray){
        jsonString="["+tempJSON+"]";
    }else{
        jsonString=tempJSON;
    }
    return jsonString;
}

I have hard coded the following lines since i did not know how to create JSON Array which is not the correct way of programming.

if(isArray){
    jsonString="["+tempJSON+"]";
}else{
    jsonString=tempJSON;
}

when i printed the convertPlainObjectToJSON result of method i get the following [[null]] which is not expected.

what is the mistake i make.

Please correct me.

Answer 1

If you notice your output, you can see [[ ( double square braces ), which means the JSONSerializer has already converted it to an JSONArray . Therefore, you needn't do it again manually.

And regarding the null between them, it is because you're passing null to the convertPlainObjectToJSON . Send a newly created object array ( as @MvG mentioned), new Object[0] , and you'll get what you want!

Always remember that blank and null are not the same!