iReport簡單使用+實際應用

iReport 是什么

iReport是一個能夠創(chuàng)建復雜報表的開源項目，并且它能調(diào)用JasperReports庫應用于任何一種java應用程序。本身是分布式的且由符合GNU通用公共許可的百分之百純java編寫。
由于它豐富的圖形界面，能夠很快的創(chuàng)建出任何一種想要的報表。iReport能夠讓我們提高技術(shù)方面的信心，比如它能降低學習JasperReports的XML語法的難度，而且能夠為熟練的技術(shù)人員節(jié)省大量的時間并能開發(fā)出非常精細的報表。

一、使用iReport軟件

1. 先創(chuàng)建一個iReport模板

根據(jù)自己的需要來創(chuàng)建模板（左上角文件->new 進行創(chuàng)建）

2.對模板進行命名

Repoet name：模板名
Location：文件存放地址
File：模板文件全路徑

3. 下一步 -> finish完成新建

4. 創(chuàng)建

5. 靜態(tài)文本框、變量

6. 使用HTML語言

7. 使用背景圖

使用圖片時java傳參樣例

iReport

new ByteArrayInputStream(new Base64().decodeBase64(new StringBuffer($F{photoBase64}).toString().getBytes("UTF-8")))

java

//ep.getData() 二進制類型數(shù)據(jù)String s = Base64.getEncoder().encodeToString(ep.getData());//轉(zhuǎn)base64//String base64 = ep.getBase64Header() + "," + s;if (ep.getData() == null){throwMsg("無照片，請先上傳");}e.put("photoBase64", ep.getData());

二、java Demo示例

1. redisUtil工具類

import com.alibaba.fastjson.JSON; import com.bjupi.utils.Utils; import com.hyjs.examination.manage.system.action.PdfController; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.data.redis.core.StringRedisTemplate; import org.springframework.stereotype.Component;import java.util.List; import java.util.Map; import java.util.concurrent.TimeUnit;@Component public class RedisUtil {private final StringRedisTemplate redisTemplate;@Autowiredpublic RedisUtil(StringRedisTemplate redisTemplate) {this.redisTemplate = redisTemplate;}/*** 設(shè)置過期時間*/public Boolean expire(String key, long timeout, TimeUnit unit) {return redisTemplate.expire(key, timeout, unit);}public void hPut(String key, String hashKey, String value) {redisTemplate.opsForHash().put(key, hashKey, value);}/*** 獲取存儲在哈希表中指定字段的值*/public Object hGet(String key, String field) {return redisTemplate.opsForHash().get(key, field);}/*** 獲取PDF打印臨時token* @param jasperName 報表名稱（無需帶后綴）* @param pageData 頁面數(shù)據(jù)（非迭代數(shù)據(jù)）* @param iterationData 迭代數(shù)據(jù)* @return* @throws Exception*/public String getPdfToken(String jasperName, Map<String,Object> pageData, List<Map<String,Object>> iterationData){String token = Utils.createUid();hPut(PdfController.PDF_PRINT+token, PdfController.JASPER_NAME,jasperName);if(pageData != null && pageData.size() > 0) {hPut(PdfController.PDF_PRINT+token, PdfController.PAGE_DATA, JSON.toJSONString(pageData));}if(iterationData != null && iterationData.size() > 0) {hPut(PdfController.PDF_PRINT+token, PdfController.ITERATION_DATA, JSON.toJSONString(iterationData));}expire(PdfController.PDF_PRINT+token, 300, TimeUnit.SECONDS);return token;}}

2. controller使用

先調(diào)用 /getPrintToken 得到token
再將token作為參數(shù)傳入/public/pdf-v1

import com.alibaba.fastjson.JSON; import com.alibaba.fastjson.JSONObject; import com.alibaba.fastjson.TypeReference; import com.hyjs.examination.manage.dict.ResponseData; import io.swagger.annotations.ApiOperation; import net.sf.jasperreports.engine.*; import net.sf.jasperreports.engine.data.JRBeanCollectionDataSource; import net.sf.jasperreports.engine.util.JRLoader; import org.apache.commons.lang.StringUtils; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.core.io.ClassPathResource; import org.springframework.stereotype.Component; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.PostMapping; import org.springframework.web.bind.annotation.RequestBody; import org.springframework.web.bind.annotation.RequestParam;import com.hyjs.examination.manage.util.RedisUtil;import javax.servlet.http.HttpServletResponse; import java.io.File; import java.io.InputStream; import java.io.OutputStream; import java.util.ArrayList; import java.util.List; import java.util.Map;@Component public class PdfController {@Autowiredprivate RedisUtil redisUtil;//路徑名稱public static final String JASPERS_LOCAL = "jaspers";public static final String PDF_PRINT = "PDF:";public static final String JASPER_NAME = "JASPER_NAME";public static final String PAGE_DATA = "PAGE_DATA";public static final String ITERATION_DATA = "ITERATION_DATA";@ApiOperation("PDF打印v1版本")@GetMapping(value = "/public/pdf-v1")public String getReportByParam(@RequestParam String token, HttpServletResponse response) {if (StringUtils.isBlank(token)) {return "缺少必要參數(shù)[token]";}Object o = redisUtil.hGet(PDF_PRINT + token, JASPER_NAME);if (o == null || StringUtils.isBlank(o.toString())) {return "等待打印時間超時,請重新操作";}String jasperName = o.toString();String pageData = null;Object o1 = redisUtil.hGet(PDF_PRINT + token, PAGE_DATA);if (o1 != null) {pageData = JSON.toJSONString(o1);}String iterationData = null;Object o2 = redisUtil.hGet(PDF_PRINT + token, ITERATION_DATA);if (o2 != null) {iterationData = o2.toString();}return getReportByParam(jasperName, pageData, iterationData, response);}private String getReportByParam(String jasperName, String pageData, String iterationData, HttpServletResponse response) {String msg = "";if (StringUtils.isBlank(jasperName)) {msg = "缺少必要參數(shù)[jasperName]";} else {ClassPathResource resource = new ClassPathResource(JASPERS_LOCAL + File.separator + jasperName + ".jasper");InputStream jasperStream = null;List<Map<String, Object>> data = new ArrayList<>();try {if (StringUtils.isNotBlank(iterationData)) {List<Map<String, Object>> list1 = JSON.parseObject(iterationData, new TypeReference<List<Map<String, Object>>>() {});if (list1 != null && list1.size() > 0) {data.addAll(list1);}}JSONObject page = null;if (StringUtils.isNotBlank(pageData)) {page = JSONObject.parseObject(pageData);}if (page != null) {if (data.size() > 0) {for (Map<String, Object> mapInner : data) {mapInner.putAll(page);}} else {data.add(page);}}JRDataSource source = new JRBeanCollectionDataSource(data);jasperStream = resource.getInputStream();JasperReport jasperReport = (JasperReport) JRLoader.loadObject(jasperStream);JasperPrint jasperPrint = null;if (data.size() > 0) {jasperPrint = JasperFillManager.fillReport(jasperReport, null, source);} else {jasperPrint = JasperFillManager.fillReport(jasperReport, null, new net.sf.jasperreports.engine.JREmptyDataSource());}// pdfresponse.setContentType("application/pdf");response.setHeader("Content-Disposition", "inline;");OutputStream outputStream = response.getOutputStream();JasperExportManager.exportReportToPdfStream(jasperPrint, outputStream);} catch (Exception e) {e.printStackTrace();msg = e.getMessage();}}return msg;}@ApiOperation("給考生打印證書（批量or單個）")@PostMapping(value = "/getPrintToken")public ResponseData getPrintToken(@RequestBody String data){JSONObject jsonObject = null;try {jsonObject = JSON.parseObject(data);} catch (Exception e) {return ResponseData.warnWithMsg("錯誤的JSON格式。");}if (jsonObject == null) {return ResponseData.warnWithMsg("錯誤的JSON格式。");}String planUuids = jsonObject.getString("planUuids");String examUuids = jsonObject.getString("examUuids");if (StringUtils.isBlank(examUuids)) {return ResponseData.warnWithMsg("缺少必要參數(shù)[examUuids]。");}//ResponseData自己封裝的返回類 printService.getPrintToken：數(shù)據(jù)ResponseData examPrintDatas = printService.getPrintToken(planUuids, examUuids);List<Map<String, Object>> printInfoDatas = (List<Map<String, Object>>)examPrintDatas.getData();String jasperName = jsonObject.getString("jasperName");if (StringUtils.isBlank(jasperName)) {return ResponseData.warnWithMsg("缺少必要參數(shù)[jasperName]。");}String token = redisUtil.getPdfToken(jasperName, null, printInfoDatas);return ResponseData.success(token);}}

3. pom

<!--jasper--><dependency><groupId>net.sf.jasperreports</groupId><artifactId>jasperreports</artifactId><version>6.6.0</version></dependency>

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