오류 500 java. lang. NoClassDefFoundation 오류: com / lowagie / text / pdf / FontMapper

보고 서 를 작성 하 는 과정 에서 pdf 형식 으로 인쇄 하 는 중 발생 하 는 오류:
HTTP Status 500 -
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception

org.apache.jasper.JasperException: javax.servlet.ServletException: 
java.lang.NoClassDefFoundError: com/lowagie/text/pdf/FontMapper




	org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:522)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:398)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:389)
	org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:96)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)

root cause

javax.servlet.ServletException: java.lang.NoClassDefFoundError: com/lowagie/text/pdf/FontMapper
	org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:852)
	org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:781)
	org.apache.jsp.html.page.report.report_jsp._jspService(report_jsp.java:126)
	org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:389)
	org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:96)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)

이 문제 가 발생 한 원인:
원래 내 가 안내 한 가방 에 문제 가 있 었 는데 다음 과 같다.
jasperreports-3.5.3.jar   ---> iText-2.1.0.jar  옳 은 거 야.
iText-2.1.0.jar ---> com.lowagie
 
iText-5.0.6.jar ---> com.itextpdf.text 
 
그래서 jasperreports - 3.5.3. jar 를 사용 할 때 iText - 5.0.6. jar 를 사용 할 수 없습니다.