xml获取的数据，怎么删除后面3位

[dadukof123]

{"expect":"861096","opencode":"03,07,08,11,12,22,31,35,36,39,46,48,50,59,61,63,68,73,74,77+03","opentime":"2017-12-12 11:10:00","opentimestamp":1513048200}]}




采集opencode的数据，opencode="([\d\,]+?)"

怎么把后面3位删了， +03 这个删了

[Inhibitory]

public class Test {
    public static void main(String[] args) {
        String text = "{\"expect\":\"861096\",\"opencode\":\"03,07,08,11,12,22,31,35,36,39,46,48,50,59,61,63,68,73,74,77+03\",\"opentime\":\"2017-12-12 11:10:00\",\"opentimestamp\":1513048200}]}\n";
        int end = text.lastIndexOf("]}");
        String json = text.substring(0, end);
        System.out.println(json);
    }
}

[thinking code]

String str = "";//你的字符串
StringBuffer sb = new StringBuffer(str);
sb.replace(str.indexOf("+"),str.indexOf("+") + 3, "");