SpringBoot+hutool工具-数据库数据导出Excel
hutool文档地址:https://www.hutool.cn/docs/#/
导入依赖
<dependency>
<groupId>cn.hutool</groupId>
<artifactId>hutool-all</artifactId>
<version>5.8.0.M2</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>5.0.0</version>
</dependency>
<dependency>
<groupId>xerces</groupId>
<artifactId>xercesImpl</artifactId>
<version>2.12.2</version>
</dependency>
测试例子(写入excel文件):
@SpringBootTest
class Demo1ApplicationTests {
@Autowired
private UserMapper userMapper;
@Test
void contextLoads() {
List<SysUser> users = userMapper.getUsers();
// 通过工具创建writer对象
// ExcelWriter writer = ExcelUtil.getWriter();
// 通过构造方法创建对象
ExcelWriter writer = new ExcelWriter("D:\\test.xls");
// 跳过第一行
writer.passCurrentRow();
// 合并单元格作标题行
writer.merge(3,“测试标题”);
// 一次性写出内容
writer.write(users, true);
// 关闭writer
writer.close();
}
}
官网例子:https://www.hutool.cn/docs/#/poi/Excel生成-ExcelWriter?id=使用例子
导出到客户端下载
@GetMapping("/export")
public String exportExcel(HttpServletResponse response) throws IOException {
List<SysUser> users = userService.getUsers();
// 通过工具类创建writer,默认创建xls格式,若想生成xlsx格式,请使用ExcelUtil.getWriter(true)创建
//ExcelWriter writer = ExcelUtil.getWriter();
ExcelWriter writer = ExcelUtil.getWriter(true);
// 一次性写出内容,使用默认样式,强制输出标题
writer.write(users, true);
//response为HttpServletResponse对象
response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;charset=utf-8");
//test.xlsx是弹出下载对话框的文件名,不能为中文,中文请自行编码
response.setHeader("Content-Disposition","attachment;filename=test.xlsx");
ServletOutputStream out=response.getOutputStream();
writer.flush(out, true);
// 关闭writer,释放内存
writer.close();
//此处记得关闭输出Servlet流
IoUtil.close(out);
return "export";
}