How to convert ArrayList<String> to JSON object using Jackson in Spring @ResponseBody

Question

Server layer will return a list of String value, like

{"Bob", "Charlotte", "Johnson", "David"...}

Now we need the List String to be a Json object to push to front end, like

[{id: "Bob"}, {id: "Charlotte"}, {id: "Johnson"}, {id: "David"...}]

or

[{name: "Bob"}, {name: "Charlotte"}, {name: "Johnson"}, {name: "David"...}]

Any label is fine, we just need a label to make it as JSON object. Does Jackson has something to convert List of String by default ie {string: "Bob"} ? That will be really sweet......

Answer 1

最简单的方法是让你的控制器方法返回一个完全映射到你想要的JSON的结构 - 例如List<SomeObject> ，其中SomeObject是一个带有String id字段的类。

Answer 2

Th way of doing this is converting you List of String into a New Map.

Code :

@ResponseBody
@RequestMapping("/mapping")
function mySpring()
{


            List<String> myStringList;
            Map<String,String> jsonMap= new LinkedHashMap<String,String>(); 
     // Use LinkedHashMap if you want to maintain order


    String key="id";        
     // Id or Name

            for (String myString: myStringList)
        {
        jsonMap.put(key,myString);

        }

return jsonMap;

}