hive udf函数替换特殊字符

import org.apache.hadoop.hive.ql.exec.UDF;

public class Rep_Ascii extends UDF
{
  private String str = null;

  public String evaluate(String urlStr)
  {
    if (urlStr == null) {
      return null;
    }

    String strs = urlStr.replaceAll("[\\x00-\\x1F]", "");

    return strs;
  }
}