JasperReport6.x +Spring Boot 导出PDF汉字不显示,提示:net.sf.jasperreports.engine.query.JRJdbcQueryExecuter

SpringBoot + JasperReport6.x 集成报表控件,导出PDF汉字无法显示,控制台提示如下错误信息:

2020-07-30 09:27:17.539 [http-nio-9092-exec-1] WARN  net.sf.jasperreports.engine.query.JRJdbcQueryExecuter - The supplied java.sql.Connection object is null.

SpringBoot 集成JasperReport6.x 之相关依赖:


		
		
			org.springframework.boot
			spring-boot-starter-web
		
		
		
			net.sf.jasperreports
			jasperreports
			6.10.0
		
		
			com.lowagie
			itext
			2.1.7.js4
		
		
			org.codehaus.groovy
			groovy-all
		
		
			org.mozilla
			javascript
			1.7.2
		
		
		
			org.springframework
			spring-context-support
		
		
		
			org.projectlombok
			lombok
		
	

指定JasperReport6.x 报表字体:

项目结构:

JasperReport6.x +Spring Boot 导出PDF汉字不显示,提示:net.sf.jasperreports.engine.query.JRJdbcQueryExecuter_第1张图片

jasperreports_extension.properties文件内容如下:

net.sf.jasperreports.extension.registry.factory.simple.font.families=net.sf.jasperreports.engine.fonts.SimpleFontExtensionsRegistryFactory
net.sf.jasperreports.extension.simple.font.families.lobstertwo=fonts/fonts.xml

 fonts.xml配置内容如下:



    
        fonts/STSONG.TTF
        fonts/STSONG.TTF
        fonts/STSONG.TTF
        fonts/STSONG.TTF
        Identity-H
        true
        
            STS, Arial, Helvetica, sans-serif
            STS, Arial, Helvetica, sans-serif
        
    

针对控制台提示信息,需要修改的代码片段:

jasperreport6.x 输出pdf 文件核心代码:

	@RequestMapping("/one")
	public void getReportByParam(HttpServletResponse response) {
		ServletOutputStream sosRef = null;
		// bean 连接获取
		try {
			Map map = new HashMap();				
				map.put("quarter", "第一季度");
				map.put("personUseCount", "111");
				map.put("archCount", "99");
				map.put("personCount", "74");
				map.put("textNumbs", "59/38");
				map.put("copyDrawingCount", "99");
 
			// 获取文件流
			ClassPathResource resource = new ClassPathResource("jasper" + File.separator + "Blank_A4_1.jasper");
			InputStream jasperStream = resource.getInputStream();
 
			sosRef = response.getOutputStream();
			// 重点代码
			JasperRunManager.runReportToPdfStream(jasperStream, sosRef, map, new JREmptyDataSource());
			response.setContentType("application/pdf");
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			try {
				sosRef.flush();
				sosRef.close();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}

在标记为重点代码片段,我之前写了一种错误写法导致,控制台输出相关错误信息:

WARN  net.sf.jasperreports.engine.query.JRJdbcQueryExecuter - The supplied java.sql.Connection object is null.

错误代码:

JasperRunManager.runReportToPdfStream(jasperStream, sosRef, map);

正确代码:

JasperRunManager.runReportToPdfStream(jasperStream, sosRef, map, new JREmptyDataSource());

报表显示效果:

JasperReport6.x +Spring Boot 导出PDF汉字不显示,提示:net.sf.jasperreports.engine.query.JRJdbcQueryExecuter_第2张图片

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