我必须根据动态提供的各种参数生成报告。在某些上下文中,参数可以为空。 例如,从表格人 ID ,名称,年龄,性别和 maritalStatus 作为字段,我必须生成关于 30岁已婚男性的报告。在其他一些时候,可能需要让已婚女性不考虑年龄。如果我对这两种情况使用相同的jasper,则第二种情况下的年龄约束将为null。有没有办法管理这种情况?
此外,是否可以动态指定报告中应生成哪些字段?
答案 0 :(得分:11)
使用JasperReport API动态生成报告的示例:
//JasperDesign
JasperDesign jasperDesign = new JasperDesign();
jasperDesign.setName("The dynamically generated report");
jasperDesign.setPageWidth(595);
jasperDesign.setPageHeight(842);
jasperDesign.setColumnWidth(515);
jasperDesign.setColumnSpacing(0);
jasperDesign.setLeftMargin(40);
jasperDesign.setRightMargin(40);
jasperDesign.setTopMargin(50);
jasperDesign.setBottomMargin(50);
//Query
JRDesignQuery query = new JRDesignQuery();
query.setText("SELECT * FROM Address $P!{OrderByClause}");
jasperDesign.setQuery(query);
//Fields
JRDesignField field = new JRDesignField();
field.setName("Id");
field.setValueClass(java.lang.Integer.class);
jasperDesign.addField(field);
field = new JRDesignField();
field.setName("FirstName");
field.setValueClass(java.lang.String.class);
jasperDesign.addField(field);
field = new JRDesignField();
field.setName("LastName");
field.setValueClass(java.lang.String.class);
jasperDesign.addField(field);
//some code
//Detail
band = new JRDesignBand();
band.setHeight(40);
JRDesignStaticText staticText = new JRDesignStaticText();
staticText.setX(0);
staticText.setY(0);
staticText.setWidth(60);
staticText.setHeight(20);
staticText.setMode(ModeEnum.OPAQUE);
staticText.setHorizontalAlignment(HorizontalAlignEnum.LEFT);
staticText.setStyle(boldStyle);
staticText.setText("ID: ");
staticText.getLineBox().getLeftPen().setLineWidth(1);
staticText.getLineBox().getTopPen().setLineWidth(1);
staticText.getLineBox().setLeftPadding(10);
band.addElement(staticText);
textField = new JRDesignTextField();
textField.setX(60);
textField.setY(0);
textField.setWidth(200);
textField.setHeight(20);
textField.setHorizontalAlignment(HorizontalAlignEnum.LEFT);
textField.setStyle(normalStyle);
expression = new JRDesignExpression();
expression.setValueClass(java.lang.Integer.class);
expression.setText("$F{Id}");
textField.setExpression(expression);
textField.getLineBox().getTopPen().setLineWidth(1);
textField.getLineBox().getRightPen().setLineWidth(1);
textField.getLineBox().setLeftPadding(10);
band.addElement(textField);
staticText = new JRDesignStaticText();
staticText.setX(0);
staticText.setY(20);
staticText.setWidth(60);
staticText.setHeight(20);
staticText.setMode(ModeEnum.OPAQUE);
staticText.setHorizontalAlignment(HorizontalAlignEnum.LEFT);
staticText.setStyle(boldStyle);
staticText.setText("Name: ");
staticText.getLineBox().getLeftPen().setLineWidth(1);
staticText.getLineBox().getBottomPen().setLineWidth(1);
staticText.getLineBox().setLeftPadding(10);
band.addElement(staticText);
textField = new JRDesignTextField();
textField.setStretchWithOverflow(true);
textField.setX(60);
textField.setY(20);
textField.setWidth(200);
textField.setHeight(20);
textField.setPositionType(PositionTypeEnum.FLOAT);
textField.setStyle(normalStyle);
expression = new JRDesignExpression();
expression.setValueClass(java.lang.String.class);
expression.setText("$F{FirstName} + \" \" + $F{LastName}");
textField.setExpression(expression);
textField.getLineBox().getRightPen().setLineWidth(1);
textField.getLineBox().getBottomPen().setLineWidth(1);
textField.getLineBox().setLeftPadding(10);
band.addElement(textField);
((JRDesignSection) jasperDesign.getDetailSection()).addBand(band);
您可以在JasperReports distribution package的 %JasperReportsFolder%/ demo / samples 文件夹中找到更多样本。
答案 1 :(得分:1)
你应该尝试使用Dynamic jasper。这正是动态jasper设计的用例类型。您可以使用相同的模板生成包含不同列的报告。
了解更多信息:http://dynamicjasper.com/