android正则表达式提取省市区字符串报错，在main方法里就正常运行，不会报错

Question

代码:

public static List> addressResolution(String address){

    Pattern pattern = Pattern.compile("((?<province>[^省]+省|.+自治区)|上海|北京|天津|重庆)(?<city>[^市]+市|.+自治州)(?<county>[^县]+县|.+区|.+镇|.+局)?(?<town>[^区]+区|.+镇)?(?<village>.*)");
    Matcher m= pattern.matcher(address);
    String province=null,city=null,county=null,town=null,village=null;
    List<Map<String,String>> table=new ArrayList<Map<String,String>>();
    Map<String,String> row=null;
    while(m.find()){
        row=new LinkedHashMap<String,String>();
        province=m.group("province");
        row.put("province", province==null?"":province.trim());
        city=m.group("city");
        row.put("city", city==null?"":city.trim());
        county=m.group("county");
        row.put("county", county==null?"":county.trim());
        town=m.group("town");
        row.put("town", town==null?"":town.trim());
        village=m.group("village");
        row.put("village", village==null?"":village.trim());
        table.add(row);
    }
    return table;
}

 有大神知道吗？

Answer 1

https://blog.csdn.net/u014534808/article/details/79415985