JasperReport动态表头及subreport实现多表

package chenjiabin.jasper; import java.io.IOException; import java.util.HashMap; import java.util.Map; import net.sf.jasperreports.engine.JRDataSource; import net.sf.jasperreports.engine.JRException; import net.sf.jasperreports.engine.JasperReport; import net.sf.jasperreports.engine.design.JRDesignBand; import net.sf.jasperreports.engine.design.JRDesignExpression; import net.sf.jasperreports.engine.design.JRDesignField; import net.sf.jasperreports.engine.design.JRDesignStaticText; import net.sf.jasperreports.engine.design.JRDesignSubreport; import net.sf.jasperreports.engine.design.JRDesignTextField; import net.sf.jasperreports.engine.design.JasperDesign; import net.sf.jasperreports.engine.xml.JRXmlLoader; public class ComponentFactory { private static JasperDesign defaultDesign = null; private static JasperDesign componentsDesign = null; private static JasperDesign itemDesign = null; private static Map<String, Object> components = new HashMap<String, Object>(); static { try { defaultDesign = JRXmlLoader.load("Default.jrxml"); itemDesign = JRXmlLoader.load("Item.jrxml"); componentsDesign = JRXmlLoader.load("Components.jrxml"); } catch (JRException e) { e.printStackTrace(); } } // -----------------------------------createField------------------------------------ public static JRDesignField createField(String field, String className) { JRDesignField newField = new JRDesignField(); newField.setName(field); newField.setValueClassName(className); return newField; } // -----------------------------------createBand------------------------------------ public static JRDesignBand createBand(int height) { JRDesignBand band = new JRDesignBand(); band.setHeight(height); return band; } // -----------------------------------createDesign------------------------------------ public static JasperDesign createDesign() { JasperDesign design = (JasperDesign) cloneBean(defaultDesign); return design; } public static JasperDesign createTableDesign() { JasperDesign design = (JasperDesign) cloneBean(itemDesign); return design; } public static JasperDesign createTableDesign(String name) { JasperDesign design = (JasperDesign) cloneBean(itemDesign); design.setName(name); return design; } public static JasperDesign createDesign(String name) { JasperDesign newDesign = createDesign(); newDesign.setName(name); return newDesign; } // -----------------------------------createStaticText------------------------------------ public static JRDesignStaticText createStaticText() { if (components.containsKey("staticText")) { return (JRDesignStaticText) cloneBean(components.get("staticText")); } else { JRDesignStaticText newStaticText = (JRDesignStaticText) cloneBean(componentsDesign .getColumnHeader().getElementByKey("staticText")); components.put("staticText", newStaticText); return newStaticText; } } public static JRDesignSubreport createSubreport(String subreportExpression, String dataSourceExpression) { JRDesignSubreport subreport = null; if (components.containsKey("subreport")) { subreport = (JRDesignSubreport) cloneBean(components .get("subreport")); return subreport; } else { subreport = (JRDesignSubreport) cloneBean(componentsDesign .getColumnHeader().getElementByKey("subreport")); components.put("subreport", subreport); } if (subreport != null) { subreport.setExpression(createExpression(subreportExpression, JasperReport.class)); subreport.setDataSourceExpression(createExpression( dataSourceExpression, JRDataSource.class)); } return subreport; } public static JRDesignExpression createExpression(String expression) { JRDesignExpression ex = new JRDesignExpression(); ex.setText("$P{" + expression + "}"); return ex; } public static JRDesignExpression createExpression(String expression, String className) { JRDesignExpression ex = createExpression(expression); ex.setValueClassName(className); return ex; } public static JRDesignExpression createExpression(String expression, Class clazz) { JRDesignExpression ex = createExpression(expression); ex.setValueClass(clazz); return ex; } public static JRDesignStaticText createStaticText(String text) { JRDesignStaticText staticText = createStaticText(); staticText.setText(text); return staticText; } public static JRDesignStaticText createStaticText(String text, Integer x, Integer y, Integer width, Integer height) { JRDesignStaticText staticText = createStaticText(); staticText.setText(text); staticText.setX(x); staticText.setY(y); staticText.setWidth(width); staticText.setHeight(height); return staticText; } public static JRDesignStaticText createStaticText(String text, Integer x, Integer y) { JRDesignStaticText staticText = createStaticText(); staticText.setText(text); staticText.setX(x); staticText.setY(y); return staticText; } // -----------------------------------createTextField------------------------------------ public static JRDesignTextField createTextField() { if (components.containsKey("textField")) { return (JRDesignTextField) cloneBean(components.get("textField")); } else { JRDesignTextField newTextField = (JRDesignTextField) cloneBean(componentsDesign .getColumnHeader().getElementByKey("textField")); components.put("textField", newTextField); return newTextField; } } public static JRDesignTextField createTextField(String expression, String valueClassName) { JRDesignTextField textField = createTextField(); textField.setExpression(createJRDesignExpression(expression, valueClassName)); return textField; } public static JRDesignTextField createTextField(String expression, String valueClassName, Integer x, Integer y, Integer width, Integer height) { JRDesignTextField textField = createTextField(expression, valueClassName); textField.setX(x); textField.setY(y); textField.setWidth(width); textField.setHeight(height); return textField; } public static JRDesignExpression createJRDesignExpression( String expression, String className) { JRDesignExpression de = new JRDesignExpression(); de.setText(expression); de.setValueClassName(className); return de; } // -----------------------------------private method-------------------- private static Object cloneBean(Object object) { Object newObject = null; try { newObject = new DeepClone().deepClone(object); } catch (ClassNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } return newObject; } }