如何在servlet中运行jasper报告 [英] How to run jasper report in servlet
问题描述
我有一个简单的jasper报告，其中显示了数据库中的一些数据.碧玉报告在ireport设计器上运行良好.问题是当我尝试从servlet运行报告时.从Servlet运行时，我试图将报告导出为pdf.我包括了
I have a simple jasper report which shows some data from database. The jasper report runs well on ireport designer. The problem is when i try to run the report from servlet. I am trying to export the report as pdf when running from a servlet. I included dependencies like
- jasperreports-4.6.0.jar
- itextpdf-5.1.1.jar
- commons-logging-1.1.1.jar
- commons-collections-3.2.1.jar
- commons-beanutils-1.8.3.jar
- commons-digester3-3.2.jar
- cglib-2.2.jar
我已将我的report1.jasper文件放在/web/report1.jasper中这是我的servlet文件:
I have placed my report1.jasper file inside /web/report1.jasper Here is my servlet file:
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
Connection connection;
ServletOutputStream servletOutputStream =response.getOutputStream();
InputStream reportStream =getServletConfig().getServletContext().getResourceAsStream("/report1.jasper");
HashMap parameterMap = new HashMap();
String stdID="510BCT2010";
String semester="1";
parameterMap.put("stdID", stdID);
parameterMap.put("semester", semester);
try
{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
connection = DriverManager.getConnection ("jdbc:odbc:ACEM","","");
JasperRunManager.runReportToPdfStream(reportStream,servletOutputStream, parameterMap, connection);
connection.close();
response.setContentType("application/pdf");
servletOutputStream.flush();
servletOutputStream.close();
}
catch (Exception e)
{
// display stack trace in the browser
StringWriter stringWriter = new StringWriter();
PrintWriter printWriter = new PrintWriter(stringWriter);
e.printStackTrace(printWriter);
response.setContentType("text/plain");
response.getOutputStream().print(stringWriter.toString());
}
}
第一次运行servlet时，出现以下错误:
When I run the servlet for the first time, i get the following error:
java.lang.NoClassDefFoundError: org/apache/commons/digester/Rule
net.sf.jasperreports.components.ComponentsExtensionsRegistryFactory.<clinit>(ComponentsExtensionsRegistryFactory.java:100)
java.lang.Class.forName0(Native Method)
java.lang.Class.forName(Class.java:247)
net.sf.jasperreports.engine.util.JRClassLoader.loadClassForRealName(JRClassLoader.java:157)
net.sf.jasperreports.engine.util.JRClassLoader.loadClassForName(JRClassLoader.java:115)
net.sf.jasperreports.engine.util.ClassUtils.instantiateClass(ClassUtils.java:53)
net.sf.jasperreports.extensions.DefaultExtensionsRegistry.instantiateRegistry(DefaultExtensionsRegistry.java:237)
net.sf.jasperreports.extensions.DefaultExtensionsRegistry.loadRegistries(DefaultExtensionsRegistry.java:214)
net.sf.jasperreports.extensions.DefaultExtensionsRegistry.loadRegistries(DefaultExtensionsRegistry.java:162)
net.sf.jasperreports.extensions.DefaultExtensionsRegistry.getRegistries(DefaultExtensionsRegistry.java:133)
net.sf.jasperreports.extensions.DefaultExtensionsRegistry.getExtensions(DefaultExtensionsRegistry.java:105)
net.sf.jasperreports.engine.util.JRStyledTextParser.<clinit>(JRStyledTextParser.java:83)
net.sf.jasperreports.engine.fill.JRBaseFiller.<init>(JRBaseFiller.java:121)
net.sf.jasperreports.engine.fill.JRVerticalFiller.<init>(JRVerticalFiller.java:88)
net.sf.jasperreports.engine.fill.JRVerticalFiller.<init>(JRVerticalFiller.java:103)
net.sf.jasperreports.engine.fill.JRVerticalFiller.<init>(JRVerticalFiller.java:61)
net.sf.jasperreports.engine.fill.JRFiller.createFiller(JRFiller.java:153)
net.sf.jasperreports.engine.fill.JRFiller.fill(JRFiller.java:55)
net.sf.jasperreports.engine.JasperFillManager.fill(JasperFillManager.java:446)
net.sf.jasperreports.engine.JasperFillManager.fill(JasperFillManager.java:407)
net.sf.jasperreports.engine.JasperRunManager.runToPdfStream(JasperRunManager.java:201)
net.sf.jasperreports.engine.JasperRunManager.runReportToPdfStream(JasperRunManager.java:720)
com.reports.reportGenerator.doGet(reportGenerator.java:54)
javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:393)
在此之后运行servlet时，出现以下错误
When i run the servlet after that i get following error
java.lang.NoClassDefFoundError: Could not initialize class net.sf.jasperreports.engine.util.JRStyledTextParser
net.sf.jasperreports.engine.fill.JRBaseFiller.<init>(JRBaseFiller.java:121)
net.sf.jasperreports.engine.fill.JRVerticalFiller.<init>(JRVerticalFiller.java:88)
net.sf.jasperreports.engine.fill.JRVerticalFiller.<init>(JRVerticalFiller.java:103)
net.sf.jasperreports.engine.fill.JRVerticalFiller.<init>(JRVerticalFiller.java:61)
net.sf.jasperreports.engine.fill.JRFiller.createFiller(JRFiller.java:153)
net.sf.jasperreports.engine.fill.JRFiller.fill(JRFiller.java:55)
net.sf.jasperreports.engine.JasperFillManager.fill(JasperFillManager.java:446)
net.sf.jasperreports.engine.JasperFillManager.fill(JasperFillManager.java:407)
net.sf.jasperreports.engine.JasperRunManager.runToPdfStream(JasperRunManager.java:201)
net.sf.jasperreports.engine.JasperRunManager.runReportToPdfStream(JasperRunManager.java:720)
com.reports.reportGenerator.doGet(reportGenerator.java:54)
javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:393)
它说java.lang.NoClassDefFoundError.我错过了一些依赖吗?我的报告没有图，只从数据库中获取数据
It says java.lang.NoClassDefFoundError. Have I missed some dependencies? My report has no graphs, only fetches data from a database
推荐答案
我发现了问题所在.Jasper报表库的依赖关系取决于其版本.jasperreport 4.6需要 groovy .我也有新的itext库(5.1)，但是jasper report 4.6仍使用iText-2.1.7.
I figured out the problem. Jasper report library dependencies depends upon its version. jasperreport 4.6 requires groovy. Also I had new itext library (5.1), but jasper report 4.6 still uses iText-2.1.7.
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