DynamicJasper的與API

Question

創建圖表，我嘗試創建的圖表與JasperReports的和API DynamicJasper的看着在Bar3DChartBuilderTest網站。

但我的代碼拋出異常：

java.lang.ClassNotFoundException: Integer.class.getName() 
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1711) 
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1556) 
java.lang.Class.forName0(Native Method) 
java.lang.Class.forName(Unknown Source) 
ar.com.fdvs.dj.core.layout.AbstractLayoutManager.registerChartVariable(AbstractLayoutManager.java:1181) 
ar.com.fdvs.dj.core.layout.AbstractLayoutManager.createChart(AbstractLayoutManager.java:1143) 
ar.com.fdvs.dj.core.layout.AbstractLayoutManager.layoutCharts(AbstractLayoutManager.java:917) 
ar.com.fdvs.dj.core.layout.AbstractLayoutManager.endLayout(AbstractLayoutManager.java:159) 
ar.com.fdvs.dj.core.layout.ClassicLayoutManager.endLayout(ClassicLayoutManager.java:160) 
ar.com.fdvs.dj.core.layout.AbstractLayoutManager.applyLayout(AbstractLayoutManager.java:106) 
ar.com.fdvs.dj.core.DynamicJasperHelper.generateJasperReport(DynamicJasperHelper.java:555) 
ar.com.fdvs.dj.core.DynamicJasperHelper.generateJasperReport(DynamicJasperHelper.java:533) 
com.ay.ireport.DynamicJasperTemplate.buildReport(DynamicJasperTemplate.java:62) 
org.apache.jsp.checkboxes_jsp._jspService(checkboxes_jsp.java:124) 
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) 
javax.servlet.http.HttpServlet.service(HttpServlet.java:722) 
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432) 
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390) 
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334) 
javax.servlet.http.HttpServlet.service(HttpServlet.java:722) 

請幫我解決這個問題。

我嘗試從用戶選擇動態創建圖表。

public void buildReport(String a[]) throws Exception{ 
    int i=0; 
    List<Object> dt=getDataType(a,tname); 
    for(int k= 0;k<dt.size();k++) 
     System.out.println(dt.get(k)); 
    String query = createQuery(a,this.tname); 
    //Create report layout 
    DynamicReport dr = buildReportLayout(a,dt); 

    JRDataSource ds = getDataSource(a, query); 
    //Exception line 
    JasperReport jr = DynamicJasperHelper.generateJasperReport(dr, new ClassicLayoutManager(), null); 
    JasperPrint jp = JasperFillManager.fillReport(jr, null, ds); 

    //JasperDesignViewer.viewReportDesign(DynamicJasperHelper.generateJasperReport(dr, new ClassicLayoutManager(),null)); 


    JasperExportManager.exportReportToPdfFile(jp,"C:/report-out.pdf"); 

} 

private DynamicReport buildReportLayout(String[] a,List dtt) { 
    DynamicReportBuilder drb = new DynamicReportBuilder(); 

    Font font = new Font(10,"Serif",true); 
    Style headerStyle = new Style(); 
    headerStyle.setFont(font); 
    headerStyle.setHorizontalAlign(HorizontalAlign.LEFT); 
    headerStyle.setVerticalAlign(VerticalAlign.MIDDLE); 

    font = new Font(8,"Serif",false); 
    Style detailStyle = new Style(); 
    detailStyle.setFont(font); 
    detailStyle.setHorizontalAlign(HorizontalAlign.LEFT); 
    detailStyle.setVerticalAlign(VerticalAlign.MIDDLE); 

    Object obj="NUMBER"; 
    Object obj1="VARCHAR2"; 
    String type = null; 
    for(i=0; i<a.length; i++) { 

     if(dtt.get(i).equals(obj)){ 
      type="Integer.class.getName()"; 
     } 
     else if(dtt.get(i).equals(obj1)){ 
      type="String.class.getName()"; 
     } 

     AbstractColumn col = ColumnBuilder.getNew() 
       .setColumnProperty(a[i],type) 
       .setTitle(a[i]).setWidth(200) 
       .setStyle(detailStyle) 
       .setHeaderStyle(headerStyle) 
       .build(); 
       drb.addColumn(col); 
    }  
    drb.setUseFullPageWidth(true); 


    DJAxisFormat categoryAxisFormat = new DJAxisFormat("category"); 
      categoryAxisFormat.setLabelFont(Font.ARIAL_SMALL); 
      categoryAxisFormat.setLabelColor(Color.DARK_GRAY); 
      categoryAxisFormat.setTickLabelFont(Font.ARIAL_SMALL); 
      categoryAxisFormat.setTickLabelColor(Color.DARK_GRAY); 
      categoryAxisFormat.setTickLabelMask(""); 
      categoryAxisFormat.setLineColor(Color.DARK_GRAY); 

      DJAxisFormat valueAxisFormat = new DJAxisFormat("value"); 
      valueAxisFormat.setLabelFont(Font.ARIAL_SMALL); 
      valueAxisFormat.setLabelColor(Color.DARK_GRAY); 
      valueAxisFormat.setTickLabelFont(Font.ARIAL_SMALL); 
      valueAxisFormat.setTickLabelColor(Color.DARK_GRAY); 
      valueAxisFormat.setTickLabelMask("#,##0.0"); 
      valueAxisFormat.setLineColor(Color.DARK_GRAY); 

      DJChart djChart = new DJBar3DChartBuilder() 
       //chart  
       .setX(20) 
       .setY(10) 
       .setWidth(500) 
       .setHeight(250) 
       .setCentered(false) 
       .setBackColor(Color.LIGHT_GRAY) 
       .setShowLegend(true) 
       .setPosition(DJChartOptions.POSITION_FOOTER) 
       .setTitle("Bosum") 
       .setTitleColor(Color.DARK_GRAY) 
       .setTitleFont(Font.ARIAL_BIG_BOLD) 
       .setSubtitle("subtitle") 
       .setSubtitleColor(Color.DARK_GRAY) 
       .setSubtitleFont(Font.COURIER_NEW_BIG_BOLD) 
       .setLegendColor(Color.DARK_GRAY) 
       .setLegendFont(Font.COURIER_NEW_MEDIUM_BOLD) 
       .setLegendBackgroundColor(Color.WHITE) 
       .setLegendPosition(DJChartOptions.EDGE_BOTTOM) 
       .setTitlePosition(DJChartOptions.EDGE_TOP) 
       .setLineStyle(DJChartOptions.LINE_STYLE_DOTTED) 
       .setLineWidth(1) 
       .setLineColor(Color.DARK_GRAY) 
       .setPadding(5) 
       //dataset 
       .setOrientation(PlotOrientation.VERTICAL) 
       .setCategory((PropertyColumn)drb.getColumn(2)) 
       .addSerie(drb.getColumn(0)) 
       //plot 
       .setXOffset(10) 
       .setyOffset(10) 
       .setShowLabels(false) 
       .setCategoryAxisFormat(categoryAxisFormat) 
       .setValueAxisFormat(valueAxisFormat) 
       .build(); 
      drb.addChart(djChart); 

      System.out.println("vvvvvvvvvvvvvvvvv0"); 
      DynamicReport dr = drb.build(); 
    return dr; 
} 

Answer 1

DJchart.getColumn（）。getValueClassNameForExpression（）

傳遞用NULL值。你需要在DJReport裏面檢查。它內部創建DJChart。