String str = "{{10.14, 11.24, 44.55, 41.01},{12.10, 14.21, 52.14, 50.44},{14.44, 16.12, 45.42, 47.55}}";
转成double[][]{ 
      {10.14, 11.24, 44.55, 41.01}, 
      {12.10, 14.21, 52.14, 50.44}, 
      {14.44, 16.12, 45.42, 47.55} 
    }

String str = "{{10.14, 11.24, 44.55, 41.01},{12.10, 14.21, 52.14, 50.44},{14.44, 16.12, 45.42, 47.55}}";
  str = str.replace("{", "[").replace("}", "]");
  String[][] arr = JSON.parseObject(str, String[][].class);
  Double[][] ds = new Double[arr.length][arr[0].length];
  for(int j=0;j<arr.length;j++){
   for(int i=0;i<arr[0].length;i++){
    ds[j][i] = Double.valueOf(arr[j][i]);
   }
  }

import com.alibaba.fastjson.JSON;