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Project Structure

Folder : jianshejisuanxitong

Files : 61

Size : 196.1 KB

Generated: 2026-03-20 18:16:23

jianshejisuanxitong/
├── README.md [191 B]
├── aspects/
│ ├── Adapter.sql [3.8 KB]
│ ├── Builder.py [6.4 KB]
│ ├── Controller.py [4.5 KB]
│ ├── Controller.ts [2.3 KB]
│ ├── Handler.js [4.5 KB]
│ ├── Manager.js [3.5 KB]
│ ├── Queue.js [4 KB]
│ └── Transformer.java [5.8 KB]
├── config/
│ ├── Cache.json [692 B]
│ ├── Converter.xml [1.7 KB]
│ ├── Handler.json [692 B]
│ ├── Observer.properties [612 B]
│ ├── Parser.properties [613 B]
│ ├── Registry.xml [1.7 KB]
│ └── application.properties [612 B]
├── dto/
│ ├── Dispatcher.cpp [1.4 KB]
│ ├── Dispatcher.py [5.6 KB]
│ ├── Factory.py [4.2 KB]
│ ├── Queue.go [3.5 KB]
│ ├── Service.ts [2.7 KB]
│ └── Util.cpp [1.4 KB]
├── lib/
│ ├── Resolver.jar [650 B]
│ └── Validator.jar [650 B]
├── mixins/
│ ├── Builder.java [7.3 KB]
│ ├── Executor.php [3 KB]
│ ├── Listener.java [7.1 KB]
│ ├── Processor.js [3.5 KB]
│ ├── Transformer.js [4 KB]
│ └── Validator.go [2.6 KB]
├── package.json [692 B]
├── pom.xml [1.4 KB]
├── session/
│ ├── Client.php [2.7 KB]
│ ├── Helper.cpp [1.6 KB]
│ ├── Observer.py [4.2 KB]
│ ├── Provider.go [3.4 KB]
│ ├── Resolver.ts [2.4 KB]
│ ├── Scheduler.cpp [1.5 KB]
│ ├── Scheduler.php [3.7 KB]
│ ├── Server.py [5.1 KB]
│ └── Worker.js [4.3 KB]
├── src/
│ ├── main/
│ │ ├── java/
│ │ │ ├── Client.java [4.3 KB]
│ │ │ ├── Converter.java [4.6 KB]
│ │ │ ├── Engine.java [4.8 KB]
│ │ │ ├── Loader.java [4.4 KB]
│ │ │ ├── Repository.java [7 KB]
│ │ │ └── Server.java [6.7 KB]
│ │ └── resources/
│ └── test/
│ └── java/
├── stub/
│ ├── Loader.ts [2.4 KB]
│ ├── Manager.py [4.7 KB]
│ ├── Parser.php [3.2 KB]
│ ├── Pool.php [3.6 KB]
│ ├── Processor.sql [2.4 KB]
│ ├── Proxy.ts [2.8 KB]
│ ├── Registry.go [3 KB]
│ ├── Service.php [2.9 KB]
│ └── Wrapper.js [4.7 KB]
└── wrappers/
├── Buffer.go [3.1 KB]
├── Cache.sql [3 KB]
└── Util.cpp [1.6 KB]

go
package balance

import (
"errors"
"sync"
"time"
)

// Transaction 交易记录
type Transaction struct {
ID string
Amount float64
Type string // "income", "expense", "freeze"
Timestamp time.Time
Remark string
}

// Balance 余额结构
type Balance struct {
mu sync.RWMutex
Available float64 // 可用余额
Frozen float64 // 冻结余额
Total float64 // 总余额
History []Transaction
}

// NewBalance 创建新余额
func NewBalance(initialAmount float64) *Balance {
return &Balance{
Available: initialAmount,
Total: initialAmount,
History: make([]Transaction, 0),
}
}

// AddIncome 增加收入
func (b *Balance) AddIncome(amount float64, remark string) error {
b.mu.Lock()
defer b.mu.Unlock()

if amount <= 0 {
    return errors.New("金额必须大于0")
}

b.Available += amount
b.Total += amount

b.History = append(b.History, Transaction{
    ID:        generateID(),
    Amount:    amount,
    Type:      "income",
    Timestamp: time.Now(),
    Remark:    remark,
})

return nil

}

// DeductExpense 扣除支出
func (b *Balance) DeductExpense(amount float64, remark string) error {
b.mu.Lock()
defer b.mu.Unlock()

if amount <= 0 {
    return errors.New("金额必须大于0")
}

if b.Available < amount {
    return errors.New("可用余额不足")
}

b.Available -= amount
b.Total -= amount

b.History = append(b.History, Transaction{
    ID:        generateID(),
    Amount:    amount,
    Type:      "expense",
    Timestamp: time.Now(),
    Remark:    remark,
})

return nil

}

func generateID() string {
return time.Now().Format("20060102150405") + randomString(6)
}

高级余额计算框架（支持并发和回滚）
go
package balance

import (
"context"
"database/sql"
"encoding/json"
"fmt"
"sync"
"time"

"github.com/google/uuid"

)

// Account 账户模型
type Account struct {
ID string json:"id"
UserID string json:"user_id"
Balance int64 json:"balance" // 使用分单位避免精度问题
Frozen int64 json:"frozen"
Version int64 json:"version" // 乐观锁版本号
CreatedAt time.Time json:"created_at"
UpdatedAt time.Time json:"updated_at"
}

// TransactionType 交易类型
type TransactionType string

const (
TypeIncome TransactionType = "income"
TypeExpense TransactionType = "expense"
TypeFreeze TransactionType = "freeze"
TypeUnfreeze TransactionType = "unfreeze"
)

// TransactionRecord 交易记录
type TransactionRecord struct {
ID string json:"id"
AccountID string json:"account_id"
Type TransactionType json:"type"
Amount int64 json:"amount"
BeforeBalance int64 json:"before_balance"
AfterBalance int64 json:"after_balance"
BeforeFrozen int64 json:"before_frozen"
AfterFrozen int64 json:"after_frozen"
Status string json:"status"
Remark string json:"remark"
CreatedAt time.Time json:"created_at"
}

// BalanceService 余额服务
type BalanceService struct {
db sql.DB
mu sync.RWMutex
cache map[string]Account
}

// TransferRequest 转账请求
type TransferRequest struct {
FromAccountID string json:"from_account_id"
ToAccountID string json:"to_account_id"
Amount int64 json:"amount"
Remark string json:"remark"
}

// 转账操作（事务保证一致性）
func (s BalanceService) Transfer(ctx context.Context, req TransferRequest) error {
tx, err := s.db.BeginTx(ctx, nil)
if err != nil {
return err
}
defer tx.Rollback()

// 扣减转出账户余额
if err := s.deductBalanceWithTx(ctx, tx, req.FromAccountID, req.Amount); err != nil {
    return err
}

// 增加转入账户余额
if err := s.addBalanceWithTx(ctx, tx, req.ToAccountID, req.Amount); err != nil {
    return err
}

// 记录交易流水
if err := s.recordTransactionWithTx(ctx, tx, req); err != nil {
    return err
}

return tx.Commit()

}

// 带乐观锁的扣减操作
func (s BalanceService) deductBalanceWithTx(ctx context.Context, tx sql.Tx, accountID string, amount int64) error {
var account Account
var currentVersion int64

// 查询当前账户信息（带锁）
query := `SELECT id, balance, frozen, version FROM accounts WHERE id = $1 FOR UPDATE`
err := tx.QueryRowContext(ctx, query, accountID).Scan(
    &account.ID, &account.Balance, &account.Frozen, &currentVersion,
)
if err != nil {
    return err
}

// 检查余额
if account.Balance < amount {
    return fmt.Errorf("余额不足: 当前余额 %d, 需要 %d", account.Balance, amount)
}

// 更新余额，使用乐观锁
updateQuery := `UPDATE accounts SET balance = balance - $1, version = version + 1, updated_at = NOW() 
                WHERE id = $2 AND version = $3`
result, err := tx.ExecContext(ctx, updateQuery, amount, accountID, currentVersion)
if err != nil {
    return err
}

rowsAffected, err := result.RowsAffected()
if err != nil {
    return err
}

if rowsAffected == 0 {
    return fmt.Errorf("更新失败，请重试")
}

return nil

}

高性能内存计算框架
go
package balance

import (
"context"
"sync"
"sync/atomic"
"time"
)

// AtomicBalance 原子操作余额
type AtomicBalance struct {
available int64 // 可用余额（分）
frozen int64 // 冻结余额（分）
mu sync.RWMutex
}

// NewAtomicBalance 创建原子余额
func NewAtomicBalance(initial int64) *AtomicBalance {
return &AtomicBalance{
available: initial,
}
}

// CASUpdate 比较并交换更新
func (b *AtomicBalance) CASUpdate(oldAvailable, newAvailable int64) bool {
return atomic.CompareAndSwapInt64(&b.available, oldAvailable, newAvailable)
}

// AddAmount 原子增加
func (b *AtomicBalance) AddAmount(delta int64) int64 {
return atomic.AddInt64(&b.available, delta)
}

// SubAmount 原子减少
func (b *AtomicBalance) SubAmount(delta int64) int64 {
for {
old := atomic.LoadInt64(&b.available)
if old < delta {
return -1
}
if atomic.CompareAndSwapInt64(&b.available, old, old-delta) {
return old - delta
}
}
}

// BatchOperation 批量操作
type BatchOperation struct {
Operations []Operation
Results chan OperationResult
}

type Operation struct {
ID string
Type string
Amount int64
}

type OperationResult struct {
OperationID string
Success bool
NewBalance int64
Error string
}

// BatchProcessor 批量处理器
type BatchProcessor struct {
balances map[string]*AtomicBalance
mu sync.RWMutex
}

func (bp BatchProcessor) ProcessBatch(ctx context.Context, batch BatchOperation) {
var wg sync.WaitGroup

for _, op := range batch.Operations {
    wg.Add(1)
    go func(operation Operation) {
        defer wg.Done()

        select {
        case <-ctx.Done():
            batch.Results <- OperationResult{
                OperationID: operation.ID,
                Success:     false,
                Error:       "context cancelled",
            }
            return
        default:
            result := bp.processOperation(operation)
            batch.Results <- result
        }
    }(op)
}

wg.Wait()
close(batch.Results)

}

使用示例
go
package main

import (
"fmt"
"log"
)

func main() {
// 简单余额计算器示例
balance := NewBalance(1000.00)

// 增加收入
err := balance.AddIncome(500.00, "工资")
if err != nil {
    log.Printf("增加收入失败: %v", err)
}

// 扣除支出
err = balance.DeductExpense(200.00, "购物")
if err != nil {
    log.Printf("扣除支出失败: %v", err)
}

fmt.Printf("可用余额: %.2f\n", balance.Available)
fmt.Printf("总余额: %.2f\n", balance.Total)

// 原子操作示例
atomicBal := NewAtomicBalance(10000) // 100.00元

// 原子增加
newBal := atomicBal.AddAmount(5000) // 增加50.00元
fmt.Printf("原子增加后余额: %d分\n", newBal)

// 原子减少
newBal = atomicBal.SubAmount(3000) // 减少30.00元
fmt.Printf("原子减少后余额: %d分\n", newBal)

// 批量操作示例
processor := &BatchProcessor{
    balances: make(map[string]*AtomicBalance),
}

// 初始化账户
processor.balances["account1"] = NewAtomicBalance(100000)
processor.balances["account2"] = NewAtomicBalance(50000)

batch := &BatchOperation{
    Operations: []Operation{
        {ID: "op1", Type: "transfer", Amount: 10000},
        {ID: "op2", Type: "transfer", Amount: 20000},
    },
    Results: make(chan OperationResult, 2),
}

go processor.ProcessBatch(context.Background(), batch)

for result := range batch.Results {
    fmt.Printf("操作结果: %+v\n", result)
}

}
关键特性
并发安全: 使用互斥锁和原子操作

事务支持: 支持数据库事务和乐观锁

精度处理: 使用整数（分）避免浮点数精度问题

批量处理: 支持高并发批量操作

回滚机制: 支持操作回滚和补偿

建设银行余额生成器，go语言计算框架

Project Structure

Folder : jianshejisuanxitong

Files : 61

Size : 196.1 KB

Generated: 2026-03-20 18:16:23

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建设银行余额生成器，go语言计算框架

Project Structure

Folder : jianshejisuanxitong

Files : 61

Size : 196.1 KB

Generated: 2026-03-20 18:16:23

热门文章

最新文章

相关电子书