递归引用调用注意事项

代码1：

   public void addParentAccount(Integer userId, Account account,Set set) {
        AccountingSubClass accountingSubClassQuery = new AccountingSubClass();
        accountingSubClassQuery.setClassCode(account.getAccountingSubClassCode());
        AccountingSubClass accountingSubClass = accountingSubClassMapper.selectOne(accountingSubClassQuery);
//        set=new HashSet();
        if (accountingSubClass != null &&
                StringUtils.isNotEmpty(accountingSubClass.getParentCode())) {
            AccountingSubClass accountingSubClassParent = getAccountingSubClass(Integer.parseInt(accountingSubClass.getParentCode()));
            if (accountingSubClassParent != null) {
                if (checkAccountIsExits(userId, account.getAccountCode(),
                        accountingSubClassParent.getClassCode(), account.getBusinessCode()) == null) {
                    set.add(getAccount(userId, account.getAccountClassCode(),
                            accountingSubClassParent.getClassCode(), account.getBusinessCode()));
                    Account accountTmp = new Account();
                    BeanUtils.copyProperties(account, accountTmp);
                    accountTmp.setAccountingSubClassCode(accountingSubClassParent.getClassCode());
                    addParentAccount(userId, accountTmp,set);
                }
            }

        }

 

代码2：

public void addParentAccount(Integer userId, Account account,Set set) { AccountingSubClass accountingSubClassQuery = new AccountingSubClass(); accountingSubClassQuery.setClassCode(account.getAccountingSubClassCode()); AccountingSubClass accountingSubClass = accountingSubClassMapper.selectOne(accountingSubClassQuery); // set=new HashSet(); if (accountingSubClass != null && StringUtils.isNotEmpty(accountingSubClass.getParentCode())) { AccountingSubClass accountingSubClassParent = getAccountingSubClass(Integer.parseInt(accountingSubClass.getParentCode())); if (accountingSubClassParent != null) { if (checkAccountIsExits(userId, account.getAccountCode(), accountingSubClassParent.getClassCode(), account.getBusinessCode()) == null) { set.add(getAccount(userId, account.getAccountClassCode(), accountingSubClassParent.getClassCode(), account.getBusinessCode()));   account.setAccountingSubClassCode(accountingSubClassParent.getClassCode()); addParentAccount(userId, account,set); } } }

 

代码1set是正确的结果

代码2 set会出现所有数据都一样的集合

由于Account account参数是引用类型调用，当你改变account属性的时候，set集合里相应的对象也会跟着改变。