package com.linghu.service;
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import com.alibaba.excel.EasyExcel;
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import com.alibaba.excel.context.AnalysisContext;
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import com.alibaba.excel.read.listener.ReadListener;
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import com.linghu.model.entity.Platform;
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import com.linghu.model.entity.Type;
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import com.linghu.model.excel.PlatformExcel;
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import com.linghu.service.TypeService;
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import com.linghu.service.PlatformService;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.stereotype.Service;
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import org.springframework.transaction.annotation.Transactional;
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import org.springframework.web.multipart.MultipartFile;
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import javax.servlet.http.HttpServletResponse;
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import java.io.IOException;
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import java.net.URLEncoder;
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import java.util.ArrayList;
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import java.util.Date;
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import java.util.List;
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@Service
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public class PlatformExcelService {
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@Autowired
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private PlatformService platformService;
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@Autowired
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private TypeService typeService;
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/**
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* 下载平台导入模板
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*/
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public void downloadTemplate(HttpServletResponse response) throws IOException {
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response.setContentType("application/vnd.ms-excel");
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response.setCharacterEncoding("utf-8");
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String fileName = URLEncoder.encode("平台导入模板", "UTF-8");
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response.setHeader("Content-disposition", "attachment;filename=" + fileName + ".xlsx");
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EasyExcel.write(response.getOutputStream(), PlatformExcel.class).sheet("平台信息").doWrite(new ArrayList<>());
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}
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/**
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* 导入平台信息
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*/
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@Transactional(rollbackFor = Exception.class)
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public void importPlatform(MultipartFile file) throws IOException {
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EasyExcel.read(file.getInputStream(), PlatformExcel.class, new ReadListener<PlatformExcel>() {
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private List<Platform> platforms = new ArrayList<>();
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@Override
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public void invoke(PlatformExcel data, AnalysisContext context) {
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// 根据类型名称获取类型ID
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Type type = typeService.getTypeByName(data.getType_name());
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if (type == null) {
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throw new RuntimeException("类型名称不存在：" + data.getType_name());
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}
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Platform platform = new Platform();
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platform.setPlatform_name(data.getPlatform_name());
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platform.setDomain(data.getDomain());
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platform.setType_id(type.getType_id());
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platform.setCreate_time(new Date());
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platform.setDel_flag(0);
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platforms.add(platform);
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// 每100条保存一次
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if (platforms.size() >= 100) {
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saveData();
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platforms.clear();
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}
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}
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@Override
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public void doAfterAllAnalysed(AnalysisContext context) {
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saveData();
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}
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private void saveData() {
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if (!platforms.isEmpty()) {
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platformService.saveBatch(platforms);
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}
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}
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}).sheet().doRead();
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}
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}
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