基于Spring Boot的校园资产管理系统

// Asset.java
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;

@Entity
public class Asset {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;
    private String name;
    private String description;
    private String serialNumber;
    // 省略getter和setter方法
}

// AssetRepository.java
import org.springframework.data.jpa.repository.JpaRepository;

public interface AssetRepository extends JpaRepository<Asset, Long> {
    // Spring Data JPA 自动生成的方法会在这里
}

// AssetService.java
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;

@Service
public class AssetService {
    @Autowired
    private AssetRepository assetRepository;

    public List<Asset> getAllAssets() {
        return assetRepository.findAll();
    }

    public Asset getAssetById(Long id) {
        return assetRepository.findById(id).orElse(null);
    }

    public Asset createAsset(Asset asset) {
        return assetRepository.save(asset);
    }

    public Asset updateAsset(Long id, Asset asset) {
        Asset existingAsset = assetRepository.findById(id).orElseThrow(() -> new RuntimeException("Asset not found"));
        existingAsset.setName(asset.getName());
        existingAsset.setDescription(asset.getDescription());
        existingAsset.setSerialNumber(asset.getSerialNumber());
        return assetRepository.save(existingAsset);
    }

    public void deleteAsset(Long id) {
        Asset asset = assetRepository.findById(id).orElse(null);
        if (asset != null) {
            assetRepository.delete(asset);
        }
    }
}

// AssetController.java
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import java.util.List;

@RestController
@RequestMapping("/assets")
public class AssetController {
    @Autowired
    private AssetService assetService;

    @GetMapping
    public List<Asset> getAllAssets() {
        return assetService.get