JSON parser

Hi, Can someone help me with sample of people code JSON parser for the below response from web service?

I would like to add item1,item2,item3,item4 to custom record after parsing

{

  "items": [

    {

      "item1": "100000",

      "item2": "200000",

      "item3": "SSS",

      "item4": "TESTING"       

    },

    {

       "item1": "100001",

      "item2": "200001",

      "item3": "SSD",

      "item4": "TESTER"  

    }

 ],

  "success": true,

  "errorMessage": null

}