2025.2.9（仓储管理系统WarehouseStaffService WarehouseStaffServiceImpl代码以及关系）

package com.example.warehouse.service;

import com.example.warehouse.entity.MaterialLedgerDetail;

import java.util.List;

public interface WarehouseStaffService {
// 入库操作
MaterialLedgerDetail inboundOperation(MaterialLedgerDetail ledgerDetail);

// 出库操作
MaterialLedgerDetail outboundOperation(MaterialLedgerDetail ledgerDetail);

// 统计查询
List<MaterialLedgerDetail> queryInventoryByMaterialCode(String materialCode);
List<MaterialLedgerDetail> queryInboundDetailsByMaterialCode(String materialCode);
List<MaterialLedgerDetail> queryOutboundDetailsByMaterialCode(String materialCode);

}

package com.example.warehouse.service.impl;

import com.example.warehouse.entity.MaterialLedgerDetail;
import com.example.warehouse.repository.MaterialLedgerDetailRepository;
import com.example.warehouse.service.WarehouseStaffService;
import com.example.warehouse.util.CodeGenerator;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;
import java.util.stream.Collectors;

@Service
public class WarehouseStaffServiceImpl implements WarehouseStaffService {
@Autowired
private MaterialLedgerDetailRepository materialLedgerDetailRepository;

@Override
public MaterialLedgerDetail inboundOperation(MaterialLedgerDetail ledgerDetail) {
    ledgerDetail.setLedgerNumber(CodeGenerator.generateLedgerNumber());
    ledgerDetail.setOperationType("入库");
    return materialLedgerDetailRepository.save(ledgerDetail);
}

@Override
public MaterialLedgerDetail outboundOperation(MaterialLedgerDetail ledgerDetail) {
    List<MaterialLedgerDetail> existingDetails = materialLedgerDetailRepository.findByMaterialCode(ledgerDetail.getMaterialCode());
    int totalQuantity = existingDetails.stream()
            .filter(detail -> "入库".equals(detail.getOperationType()))
            .mapToInt(MaterialLedgerDetail::getQuantity)
            .sum() - existingDetails.stream()
            .filter(detail -> "出库".equals(detail.getOperationType()))
            .mapToInt(MaterialLedgerDetail::getQuantity)
            .sum();
    if (ledgerDetail.getQuantity() > totalQuantity) {
        throw new RuntimeException("出库数量大于库存余额，无法进行出库！");
    }
    ledgerDetail.setLedgerNumber(CodeGenerator.generateLedgerNumber());
    ledgerDetail.setOperationType("出库");
    return materialLedgerDetailRepository.save(ledgerDetail);
}

@Override
public List<MaterialLedgerDetail> queryInventoryByMaterialCode(String materialCode) {
    List<MaterialLedgerDetail> details = materialLedgerDetailRepository.findByMaterialCode(materialCode);
    int totalQuantity = details.stream()
            .filter(detail -> "入库".equals(detail.getOperationType()))
            .mapToInt(MaterialLedgerDetail::getQuantity)
            .sum() - details.stream()
            .filter(detail -> "出库".equals(detail.getOperationType()))
            .mapToInt(MaterialLedgerDetail::getQuantity)
            .sum();
    MaterialLedgerDetail summary = details.stream().findFirst().orElse(new MaterialLedgerDetail());
    summary.setQuantity(totalQuantity);
    return List.of(summary);
}

@Override
public List<MaterialLedgerDetail> queryInboundDetailsByMaterialCode(String materialCode) {
    return materialLedgerDetailRepository.findByMaterialCode(materialCode).stream()
            .filter(detail -> "入库".equals(detail.getOperationType()))
            .collect(Collectors.toList());
}

@Override
public List<MaterialLedgerDetail> queryOutboundDetailsByMaterialCode(String materialCode) {
    return materialLedgerDetailRepository.findByMaterialCode(materialCode).stream()
            .filter(detail -> "出库".equals(detail.getOperationType()))
            .collect(Collectors.toList());
}

}