在制作報表過程中，以pdf格式打印時出現的錯誤：

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)

出現此問題的原因:

原來是我導的包有問題，如下：

jasperreports-3.5.3.jar?---> iText-2.1.0.jar?才是正確的

iText-2.1.0.jar

---> com.lowagie

iText-5.0.6.jar

---> com.itextpdf.text

所以在用 jasperreports-3.5.3.jar時，不能用 iText-5.0.6.jar

總結

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