后台如何返给前台“饼状图格式”的数据？

前端要求格式：

data: [

{ value: 1048, name: 'Search Engine'},

{ value: 735, name: 'Direct' },

{ value: 580, name: 'Email' },

{ value: 484, name: 'Union Ads'},

{ value: 300, name: 'Video Ads'}

]

展示效果：

后端处理：

class DataPoint {  
    private int value;  
    private String name;  

    public DataPoint(int value, String name) {  
        this.value = value;  
        this.name = name;  
    }  

    public int getValue() {  
        return value;  
    }  

    public String getName() {  
        return name;  
    }  

    @Override  
    public String toString() {  
        return "{ value: " + value + ", name: '" + name + "' }";  
    }  
}  

public class Main {  
    public static void main(String[] args) {  
        List<DataPoint> dataList = new ArrayList<>();  

        dataList.add(new DataPoint(1048, "Search Engine"));  
        dataList.add(new DataPoint(735, "Direct"));  
        dataList.add(new DataPoint(580, "Email"));  
        dataList.add(new DataPoint(484, "Union Ads"));  
        dataList.add(new DataPoint(300, "Video Ads"));  

        // 输出数据  
        for (DataPoint dataPoint : dataList) {  
            System.out.println(dataPoint);  
        }  
    }  
}