fuquanapi/src/main/java/com/example/webapi/service/VehicleInfoService.java

package com.example.webapi.service;

import com.example.webapi.dto.VehicleInfoQueryDTO;
import com.example.webapi.entity.VehicleInfo;
import com.example.webapi.repository.VehicleInfoRepository;
import com.example.webapi.util.PageUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Example;
import org.springframework.data.domain.ExampleMatcher;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;

import java.util.Optional;

@Service
public class VehicleInfoService {

    @Autowired
    private VehicleInfoRepository repository;

    public Page<VehicleInfo> findAll(Pageable pageable) {
        return repository.findAll(pageable);
    }

    /**
     * 根据条件查询车辆信息（分页）
     * 
     * @param queryDTO 查询条件（包含分页参数）
     * @return 分页结果
     */
    public Page<VehicleInfo> findByConditions(VehicleInfoQueryDTO queryDTO) {
        // 从QueryDTO中提取分页参数
        Pageable pageable = PageUtil.createPageable(queryDTO);
        
        // 创建实体对象作为查询条件
        VehicleInfo probe = new VehicleInfo();
        
        // 设置查询条件（只设置非空值）
        if (StringUtils.hasText(queryDTO.getLicensePlate())) {
            probe.setLicensePlate(queryDTO.getLicensePlate());
        }
        if (StringUtils.hasText(queryDTO.getType())) {
            probe.setType(queryDTO.getType());
        }
        if (queryDTO.getOutage() != null) {
            probe.setOutage(queryDTO.getOutage());
        }
        if (queryDTO.getLock() != null) {
            probe.setLock(queryDTO.getLock());
        }
        if (queryDTO.getTransCompany() != null) {
            probe.setTransCompany(queryDTO.getTransCompany());
        }
        if (queryDTO.getReviewed() != null) {
            probe.setReviewed(queryDTO.getReviewed());
        }
        if (StringUtils.hasText(queryDTO.getRemarks())) {
            probe.setRemarks(queryDTO.getRemarks());
        }
        
        // 创建ExampleMatcher，配置模糊查询
        ExampleMatcher matcher = ExampleMatcher.matching()
                .withStringMatcher(ExampleMatcher.StringMatcher.CONTAINING)  // 字符串使用包含匹配
                .withIgnoreCase()  // 忽略大小写
                .withIgnoreNullValues();  // 忽略空值
        
        // 创建Example对象
        Example<VehicleInfo> example = Example.of(probe, matcher);
        
        // 执行查询
        return repository.findAll(example, pageable);
    }

    public Optional<VehicleInfo> findById(Integer id) {
        return repository.findById(id);
    }

    public VehicleInfo save(VehicleInfo entity) {
        return repository.save(entity);
    }

    public void deleteById(Integer id) {
        repository.deleteById(id);
    }
}