jasperreports html线条显示的问题

1、在web.xml设置ireport图片显示服务:

       ImageServlet
       net.sf.jasperreports.j2ee.servlets.ImageServlet
   

< servlet-mapping>
       ImageServlet
       /servlets/image
    
2、设置ImageServlet.DEFAULT_JASPER_PRINT_SESSION_ATTRIBUTEsession
request.getSession().setAttribute(ImageServlet.DEFAULT_JASPER_PRINT_SESSION_ATTRIBUTE, jasperPrint);

3、设置图片servlet服务的路径:
exporter.setParameter(JRHtmlExporterParameter.IMAGES_URI,request.getContextPath()+"/servlets/image?image=");


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