我的堆栈
Spring Boot 1.5.6
JasperReport
Ajax JQuery 3.1.1
我的目标
我正在尝试使用jasper报表第一次打印报表，我有一个存储报表的打印服务，我的想法是通过包含数据的ajax发送http请求并获取pdf报表
我尝试过的事情
我的spring-boot后端中有一个rest控制器，就像这样实现
@RestController
@RequestMapping(PrintController.API)
public class PrintController {
public static final String API="print";
@PostMapping("client")
public void export(@RequestBody List<ClientJsonDto> datas,HttpServletResponse response){
System.out.println(datas);
JRBeanCollectionDataSource itemsJRBean = new JRBeanCollectionDataSource(datas);
/* Map to hold Jasper report Parameters */
Map<String, Object> parameters = new HashMap<String, Object>();
parameters.put("ItemDataSource", itemsJRBean);
byte[] bytes = generatePDFReport("refclient", parameters);
return ResponseEntity
.ok()
// Specify content type as PDF
.header("Content-Type", "application/pdf; charset=UTF-8")
// Tell browser to display PDF if it can
.header("Content-Disposition", "attachment;inline; filename=\"client.pdf\"")
.body(bytes);
}
public byte[] generatePDFReport(String inputFileName, Map<String, Object> params) {
return generatePDFReport(inputFileName, params, new JREmptyDataSource());
}
public File loadJasperFile(String file) {
try {
return ResourceUtils.getFile("classpath:static/reports/"+file+".jasper");
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
};
return null;
}
public byte[] generatePDFReport(String inputFileName, Map<String, Object> params,
JRDataSource dataSource) {
byte[] bytes = null;
JasperReport jasperReport = null;
try (ByteArrayOutputStream byteArray = new ByteArrayOutputStream()) {
// Check if a compiled report exists
jasperReport = (JasperReport) JRLoader.loadObject(loadJasperFile(inputFileName));
// Compile report from source and save
JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, params, dataSource);
// return the PDF in bytes
bytes = JasperExportManager.exportReportToPdf(jasperPrint);
}
catch (JRException | IOException e) {
e.printStackTrace();
}
return bytes;
}
}
我的报告如下
<?xml version="1.0" encoding="UTF-8"?>
<!-- Created with Jaspersoft Studio version 7.2.0.final using JasperReports Library version 6.6.0 -->
<jasperReport xmlns="http://jasperreports.sourceforge.net/jasperreports" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports http://jasperreports.sourceforge.net/xsd/jasperreport.xsd" name="refClient" pageWidth="595" pageHeight="842" whenNoDataType="AllSectionsNoDetail" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" isIgnorePagination="true" uuid="576dcd38-2982-412b-93d5-2a078da1b183">
<property name="com.jaspersoft.studio.data.defaultdataadapter" value="One Empty Record"/>
<style name="Table_TH" mode="Opaque" backcolor="#F0F8FF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
<topPen lineWidth="0.5" lineColor="#000000"/>
<leftPen lineWidth="0.5" lineColor="#000000"/>
<bottomPen lineWidth="0.5" lineColor="#000000"/>
<rightPen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<style name="Table_CH" mode="Opaque" backcolor="#BFE1FF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
<topPen lineWidth="0.5" lineColor="#000000"/>
<leftPen lineWidth="0.5" lineColor="#000000"/>
<bottomPen lineWidth="0.5" lineColor="#000000"/>
<rightPen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<style name="Table_TD" mode="Opaque" backcolor="#FFFFFF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
<topPen lineWidth="0.5" lineColor="#000000"/>
<leftPen lineWidth="0.5" lineColor="#000000"/>
<bottomPen lineWidth="0.5" lineColor="#000000"/>
<rightPen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<style name="Table 1_TH" mode="Opaque" backcolor="#F0F8FF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
<topPen lineWidth="0.5" lineColor="#000000"/>
<leftPen lineWidth="0.5" lineColor="#000000"/>
<bottomPen lineWidth="0.5" lineColor="#000000"/>
<rightPen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<style name="Table 1_CH" mode="Opaque" backcolor="#BFE1FF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
<topPen lineWidth="0.5" lineColor="#000000"/>
<leftPen lineWidth="0.5" lineColor="#000000"/>
<bottomPen lineWidth="0.5" lineColor="#000000"/>
<rightPen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<style name="Table 1_TD" mode="Opaque" backcolor="#FFFFFF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
<topPen lineWidth="0.5" lineColor="#000000"/>
<leftPen lineWidth="0.5" lineColor="#000000"/>
<bottomPen lineWidth="0.5" lineColor="#000000"/>
<rightPen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<subDataset name="ItemDataset" uuid="2914f7c6-c2d7-448b-b0c1-090970e18ed6">
<queryString>
<![CDATA[]]>
</queryString>
<field name="clientName" class="java.lang.String"/>
<field name="identifiant" class="java.lang.String"/>
<field name="codeExterne" class="java.lang.String"/>
</subDataset>
<parameter name="ItemDataSource" class="net.sf.jasperreports.engine.data.JRBeanCollectionDataSource"/>
<queryString>
<![CDATA[select 1 from dual]]>
</queryString>
<background>
<band splitType="Stretch"/>
</background>
<title>
<band height="50">
<staticText>
<reportElement x="11" y="11" width="100" height="30" uuid="9d66bc1e-2b6d-49b7-8a64-74fbd2e5d5eb"/>
<text><![CDATA[Liste des clients]]></text>
</staticText>
</band>
</title>
<detail>
<band height="256" splitType="Stretch">
<componentElement>
<reportElement x="0" y="0" width="555" height="200" uuid="7786bb05-503a-4b6a-991a-a7bcf3abad07">
<property name="com.jaspersoft.studio.layout" value="com.jaspersoft.studio.editor.layout.VerticalRowLayout"/>
<property name="com.jaspersoft.studio.table.style.table_header" value="Table 1_TH"/>
<property name="com.jaspersoft.studio.table.style.column_header" value="Table 1_CH"/>
<property name="com.jaspersoft.studio.table.style.detail" value="Table 1_TD"/>
</reportElement>
<jr:table xmlns:jr="http://jasperreports.sourceforge.net/jasperreports/components" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports/components http://jasperreports.sourceforge.net/xsd/components.xsd">
<datasetRun subDataset="ItemDataset" uuid="d3e1e03a-2c83-4436-9e50-79518bc3d337">
<dataSourceExpression><![CDATA[$P{ItemDataSource}]]></dataSourceExpression>
</datasetRun>
<jr:column width="130" uuid="dca8961f-ce2d-47ac-879c-b15847d170a9">
<property name="com.jaspersoft.studio.components.table.model.column.name" value="Colonne1"/>
<jr:tableHeader style="Table 1_TH" height="30" rowSpan="1">
<staticText>
<reportElement x="0" y="0" width="130" height="30" uuid="f60d1675-6fb6-4569-93ca-de32b3a8e861"/>
<box>
<topPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<leftPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<bottomPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<rightPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
</box>
<text><![CDATA[Nom]]></text>
</staticText>
</jr:tableHeader>
<jr:detailCell style="Table 1_TD" height="30">
<textField>
<reportElement x="0" y="0" width="130" height="30" uuid="f1de366a-b36f-4200-9b1e-7a0009be5373"/>
<box>
<topPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<leftPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<bottomPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<rightPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
</box>
<textFieldExpression><![CDATA[$F{clientName}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
<jr:column width="140" uuid="980fffb5-1088-47a6-b00f-b5d08b7093c9">
<property name="com.jaspersoft.studio.components.table.model.column.name" value="Colonne2"/>
<jr:tableHeader style="Table 1_TH" height="30" rowSpan="1">
<staticText>
<reportElement x="0" y="0" width="140" height="30" uuid="16679b95-2e6e-4ca1-b8b6-dd7b74267c56"/>
<box>
<topPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<leftPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<bottomPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<rightPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
</box>
<text><![CDATA[Identifiant]]></text>
</staticText>
</jr:tableHeader>
<jr:detailCell style="Table 1_TD" height="30">
<textField>
<reportElement x="0" y="0" width="140" height="30" uuid="341e7faf-9680-4941-a9a4-ac78b8f4aae0"/>
<box>
<topPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<leftPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<bottomPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<rightPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
</box>
<textFieldExpression><![CDATA[$F{identifiant}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
<jr:column width="100" uuid="761d1134-6b53-4b5d-9355-b44586d8d8aa">
<property name="com.jaspersoft.studio.components.table.model.column.name" value="Colonne3"/>
<jr:tableHeader style="Table 1_TH" height="30" rowSpan="1">
<staticText>
<reportElement x="0" y="0" width="100" height="30" uuid="b07f5db5-1df8-48e9-a612-27ad6110fdcd"/>
<box>
<topPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<leftPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<bottomPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<rightPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
</box>
<text><![CDATA[Code]]></text>
</staticText>
</jr:tableHeader>
<jr:detailCell style="Table 1_TD" height="30">
<textField>
<reportElement x="0" y="0" width="100" height="30" uuid="1e0438b1-82e5-429a-b63a-5349014cf84a"/>
<box>
<topPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<leftPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<bottomPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<rightPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
</box>
<textFieldExpression><![CDATA[$F{codeExterne}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
</jr:table>
</componentElement>
</band>
</detail>
</jasperReport>
如您所见，我在发送jrcollection的参数中使用了它，这是在youtube上找到的教程中使用的。
对于响应处理，我有这个js ajax调用
$(document).on('click', '#menu0-func1-menu0-func1', function(){
console.log(printData);
var jsonData =JSON.parse(JSON.stringify(printData));
var settings = {
"async" : true,
"crossDomain" : true,
"url" : "http://"+document.location.host+"/facturation/print/client",
"method" : "POST",
"headers" : {
"cache-control" : "no-cache",
'X-CSRF-TOKEN': $('meta[name="csrf-token"]').attr('content')
},
"processData" : false,
"contentType" : "application/json",
"dataType" : "text",
"data" : JSON.stringify(printData)
}
$.ajax(settings).done(function(response, status, xhr) {
console.log(response);
// check for a filename
var filename = "";
var disposition = xhr.getResponseHeader('Content-Disposition');
if (disposition && disposition.indexOf('attachment') !== -1) {
var filenameRegex = /filename[^;=\n]*=((['"]).*?\2|[^;\n]*)/;
var matches = filenameRegex.exec(disposition);
if (matches != null && matches[1]) filename = matches[1].replace(/['"]/g, '');
}
var type = xhr.getResponseHeader('Content-Type');
var blob = new Blob([response], { type: type });
if (typeof window.navigator.msSaveBlob !== 'undefined') {
// IE workaround for "HTML7007: One or more blob URLs were revoked by closing the blob for which they were created. These URLs will no longer resolve as the data backing the URL has been freed."
window.navigator.msSaveBlob(blob, filename);
} else {
var URL = window.URL || window.webkitURL;
var downloadUrl = URL.createObjectURL(blob);
if (filename) {
// use HTML5 a[download] attribute to specify filename
var a = document.createElement("a");
// safari doesn't support this yet
if (typeof a.download === 'undefined') {
window.location = downloadUrl;
} else {
a.href = downloadUrl;
a.download = filename;
document.body.appendChild(a);
a.click();
}
} else {
window.location = downloadUrl;
}
setTimeout(function () { URL.revokeObjectURL(downloadUrl); }, 100); // cleanup
}
});
});
也不例外，通常我至少应该得到报告的标题，但是我得到的PDF页面为空
这是我在Chrome中的控制台日志
%PDF-1.5
%����
3 0 obj
<</Filter/FlateDecode/Length 882>>stream
x���[O1���W��>�z|�M^i�J�B�T��e�Q��`����zJc�����}|2_���hU�R,d)Vuq�*�J�u!�W�{a�X�w' @�US�Y�t��D��ޤ�)�e��Ӧ8��m�ע^���n��n�#���9��O�\�ג�K��Rֺw�����
�r��59��>/� 0^���r�`ޙ�ֈ�h�!�`�/���5�KƆ��Yb�\
#��1hP�
�ďK.fYyk?���%�6T�!�}�˾(j�on7����M���?F6���V��F�M^&�IjywI�h��������WV1d���L2N�w��̦%�E�c�B��I��єB�R��b!�2�f���d=*�I�����"�KB�"
��&�������ֲX�df2��C"�zf�#)Ό�wLJ��F����аH��E#
��%/!b=��,�"y�XKyA˿��e
endstream
endobj
1 0 obj
<</Tabs/S/Group<</S/Transparency/Type/Group/CS/DeviceRGB>>/Contents 3 0 R/Type/Page/Resources<</ColorSpace<</CS/DeviceRGB>>/ProcSet [/PDF /Text /ImageB /ImageC /ImageI]/Font<</F1 2 0 R>>>>/Parent 4 0 R/MediaBox[0 0 595 842]>>
endobj
5 0 obj
[1 0 R/XYZ 0 852 0]
endobj
2 0 obj
<</Subtype/Type1/Type/Font/BaseFont/Helvetica/Encoding/WinAnsiEncoding>>
endobj
4 0 obj
<</Kids[1 0 R]/Type/Pages/Count 1/ITXT(2.1.7)>>
endobj
6 0 obj
<</Names[(JR_PAGE_ANCHOR_0_1) 5 0 R]>>
endobj
7 0 obj
<</Dests 6 0 R>>
endobj
8 0 obj
<</Names 7 0 R/Type/Catalog/Pages 4 0 R/ViewerPreferences<</PrintScaling/AppDefault>>>>
endobj
9 0 obj
<</ModDate(D:20181123161409Z)/Creator(JasperReports Library version 6.4.0)/CreationDate(D:20181123161409Z)/Producer(iText 2.1.7 by 1T3XT)>>
endobj
xref
0 10
0000000000 65535 f
0000000964 00000 n
0000001240 00000 n
0000000015 00000 n
0000001328 00000 n
0000001205 00000 n
0000001391 00000 n
0000001445 00000 n
0000001477 00000 n
0000001580 00000 n
trailer
<</Info 9 0 R/ID [<b7d27a6f96e6278f5c1d222f79d7c999><b97ae89e1e568703aeb75af2080d04d8>]/Root 8 0 R/Size 10>>
startxref
1735
%%EOF
该怎么办，我最近3天尝试了很多教程，但没有成功
修改
我使用JasperExportManager.exportReportToPdfFile(jasperPrint, "rapport.pdf");生成了pdf文件，并且该pdf文件格式正确，我将该井pdf的txt表示形式与收到的日志进行了比较，它们是相同的，我的空白pdf为3kb，格式正确的也是3kb。
答案 0 :(得分：1)
我已经尝试过您的JavaScript代码，确实存在问题。
但是问题出在jQuery的ajax实现内部。它不能正确处理响应数据类型。
本文here提供了两种选择：直接使用XMLHttpRequest对象或使用专门为此问题设计的自定义jQuery plugin。
另一种选择是将控制器逻辑分为两部分：
答案 1 :(得分：1)