mongodb - fuzzy matching

1、完全匹配
Pattern pattern = Pattern.compile("^name$", Pattern.CASE_INSENSITIVE);
2、右匹配
Pattern pattern = Pattern.compile("^.*name$", Pattern.CASE_INSENSITIVE);
3、左匹配
Pattern pattern = Pattern.compile("^name.*$", Pattern.CASE_INSENSITIVE);
4、模糊匹配
Pattern pattern = Pattern.compile("^.*name8.*$", Pattern.CASE_INSENSITIVE);

左匹配
Pattern unitP = Pattern.compile("^"+po.getUnitId()+".*$", Pattern.CASE_INSENSITIVE);
query.addCriteria(Criteria.where("unitId").regex(unitP));