資訊專欄INFORMATION COLUMN
摘要：由于工作需要，要實(shí)現(xiàn)后端根據(jù)模板動(dòng)態(tài)填充數(shù)據(jù)生成文檔，通過技術(shù)選型，使用來設(shè)計(jì)模板，結(jié)合工具庫來調(diào)用渲染生成文檔。
由于工作需要，要實(shí)現(xiàn)后端根據(jù)模板動(dòng)態(tài)填充數(shù)據(jù)生成PDF文檔，通過技術(shù)選型，使用Ireport5.6來設(shè)計(jì)模板，結(jié)合JasperReports5.6工具庫來調(diào)用渲染生成PDF文檔。本人文采欠缺，寫作能力差，下面粗略的介紹其使用步驟，若有不對(duì)的地方，望大家莫噴，謝謝！
一、使用Ireport designer 5.6設(shè)計(jì)模板ireport的使用由于時(shí)間關(guān)系不便多說，設(shè)計(jì)好之后，將其進(jìn)行編譯生成jasper文件，然后將其拷貝放置于項(xiàng)目某個(gè)目錄下，以供訪問獲取該文件。
二、在Spring Boot項(xiàng)目中引入依賴包三、自定義spring mvc通用導(dǎo)出PDF視圖類PdfReportView（繼承自AbstractView ）net.sf.jasperreports jasperreports 6.0.0 net.sf.jasperreports jasperreports-fonts 6.0.0 com.itextpdf itextpdf 5.5.0 com.itextpdf itext-pdfa 5.5.0 com.itextpdf itext-asian 5.2.0 org.codehaus.groovy groovy-all 2.4.11
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.HashMap;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import net.sf.jasperreports.engine.JRDataSource;
import net.sf.jasperreports.engine.JREmptyDataSource;
import net.sf.jasperreports.engine.JasperExportManager;
import net.sf.jasperreports.engine.JasperFillManager;
import net.sf.jasperreports.engine.JasperPrint;
import org.springframework.web.servlet.view.AbstractView;
public class PdfReportView extends AbstractView {
private static final String CONTENT_TYPE = "application/pdf";
private String templatePath;
private String exportFileName;
public PdfReportView(String templatePath, String exportFileName) {
this.templatePath = templatePath;
if (exportFileName != null) {
try {
exportFileName = URLEncoder.encode(exportFileName, "UTF-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}
this.exportFileName = exportFileName;
setContentType(CONTENT_TYPE);
}
protected Map getParamsMap(Map map) throws Exception {
Map params = new HashMap<>();
for (String key : map.keySet()) {
Object val = map.get(key);
if (val instanceof JRDataSource) {
continue;
} else {
params.put(key, val);
}
}
return params;
}
protected JRDataSource getDataSource(Map map) throws Exception {
for (String key : map.keySet()) {
Object val = map.get(key);
if (val instanceof JRDataSource) {
return (JRDataSource) map.get(key);
}
}
return new JREmptyDataSource();
}
@Override
protected void renderMergedOutputModel(Map map,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
response.setCharacterEncoding("utf-8");
response.setContentType(getContentType());
//response.setContentType("application/octet-stream");
response.setHeader("content-disposition", "attachment;filename=" + exportFileName + ".pdf");
try (InputStream inputStream = Thread.currentThread().getContextClassLoader()
.getResourceAsStream(templatePath)) {
try (OutputStream ouputStream = response.getOutputStream()) {
JasperPrint jasperPrint = JasperFillManager
.fillReport(inputStream, getParamsMap(map), getDataSource(map));
JasperExportManager.exportReportToPdfStream(jasperPrint, ouputStream);
} catch (IOException e) {
e.printStackTrace();
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
四、spring mvc調(diào)用案例
