Conversion between Java class objects and JSON data

There are too many table fields and you don't want to save them separately to the data, so use a low frequency, so consider using the Jave class--JSON data conversion.

1. Class conversion JSON, and save to data

Attribute.java

1 /**2 * Attribute data structure3  *4  */5  Public classAttribute {6 7     Private Static Final LongSerialversionuid = -1l;8 9     PrivateLong Attrid;Ten  One     PrivateList<attributevalue>attributevalues; A  -     PrivateLong catid; -  the     PrivateString Cnname; -  -     PrivateBoolean customizeimage; -  +     PrivateBoolean Customizevalue; -  +     PrivateString Enname; A  at     PrivateString InputType; -  -     PrivateBoolean keyattr; -  -     PrivateBoolean Locator; -  in     PrivateLong order; -  to     PrivateLong Parentvalue; +  -     PrivateBoolean required; the  *     PrivateList<string> units;

Attribute.java

Attributeservice.java

1 // convert to JSON string 2 list<attribute> attributes = response.getattributes (); 3 Jsonarray jsonarray = jsonarray.fromobject (attributes); 4 // Save to data 5 this. Save (Jsonarray.tostring ());

2. JSON conversion into class

Attributeservice.java

1 //get JSON properties from the database2String Jsonattribute = This. getattribute ();3 //convert to JSON array4Jsonarray jsonattr =Jsonarray.fromobject (jsonattribute);5 //because the attribute class contains List<attributevalue>, you need to add a subset6map<string, class> classmap =NewHashmap<string, class>(); 7Classmap.put ("Attributevalues", AttributeValue.class); 8 //Final Convert List object complete9List<attribute> listproductattributes = (list<attribute>) jsonarray.tolist (jsonAttr, Attribute.class, Classmap);

Another way to deal with the data, this will be more simple, the operation of the database more convenient, but in the database is not easy to read, page-side display and sub-table sub-field storage no difference.

Conversion between Java class objects and JSON data