springboot导入jasper

要在Spring Boot中使用Jasper报表工具，可以按照以下步骤进行操作：

1. 在pom.xml文件中加入以下依赖：

<dependency>
    <groupId>net.sf.jasperreports</groupId>
    <artifactId>jasperreports</artifactId>
    <version>6.17.0</version>
</dependency>

2. 在application.properties文件中配置Jasper报表文件的存放路径：

jasper.report.path=/report

3. 创建一个JasperReportService，用于加载Jasper报表文件：

@Service
public class JasperReportService {
    @Value("${jasper.report.path}")
    private String reportPath;

    public JasperPrint getJasperPrint(String reportName, Map<String, Object> params) throws JRException {
        String filePath = reportPath + "/" + reportName + ".jrxml";
        InputStream inputStream = this.getClass().getResourceAsStream(filePath);
        JasperDesign jasperDesign = JRXmlLoader.load(inputStream);
        JasperReport jasperReport = JasperCompileManager.compileReport(jasperDesign);
        JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, params, new JREmptyDataSource());
        return jasperPrint;
    }
}

4. 在Controller中调用JasperReportService生成JasperPrint对象，并将其转换成PDF或其他格式：

@RestController
@RequestMapping("/report")
public class ReportController {
    @Autowired
    private JasperReportService jasperReportService;

    @GetMapping(value = "/{reportName}", produces = MediaType.APPLICATION_PDF_VALUE)
    public ResponseEntity<byte[]> getReport(@PathVariable String reportName) throws Exception {
        Map<String, Object> params = new HashMap<>();
        JasperPrint jasperPrint = jasperReportService.getJasperPrint(reportName, params);
        byte[] pdfBytes = JasperExportManager.exportReportToPdf(jasperPrint);
        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.APPLICATION_PDF);
        headers.setContentDisposition(ContentDisposition.builder("inline").filename(reportName + ".pdf").build());
        headers.setContentLength(pdfBytes.length);
        return new ResponseEntity<>(pdfBytes, headers, HttpStatus.OK);
    }
}

这样就可以在Spring Boot中使用Jasper报表工具了。