JSP頁面中的Jasper報告

Question

如何在JSP頁面中顯示jasper報告？我正在使用iReport1.3.3工具創建
報告。我努力在JSP頁面中顯示jasper報告。

是否有可能將ArrayList傳遞給碧玉報告？

我需要以PDF和EXcel格式顯示報告。

Answer 1

我寫了一個呈現PDF和CSV的struts（1.1）應用程序。我會在一個行動處理器做到這一點：

public ActionForward execute(ActionMapping mapping, ActionForm form, 
     HttpServletRequest request, HttpServletResponse response) 
     throws Exception { 
    response.setContentType("application/pdf"); 
    OutputStream out = response.getOutputStream(); 
    try { 
     // generate the PDF 
    } finally { 
     out.close(); 
    } 
    return null; 
} 

UPDATE：餵養集合來JasperReports的

package reports; 

import java.lang.reflect.Method; 
import java.util.Collection; 
import java.util.Iterator; 
import java.util.Arrays; 
import net.sf.jasperreports.engine.JRDataSource; 
import net.sf.jasperreports.engine.JRField; 
import net.sf.jasperreports.engine.JRException; 

public class CollectionDataSource implements JRDataSource { 
    private Iterator iterator = null; 
    private Object current = null; 

    public CollectionDataSource(Collection col) { 
     if (col != null) { 
      iterator = col.iterator(); 
     } 
    } 

    public CollectionDataSource(Object array[]) { 
     this(Arrays.asList(array == null ? new Object[0] : array)); 
    } 

    public boolean next() throws JRException { 
     if (iterator == null || !iterator.hasNext()) { 
      return false; 
     } else { 
      current = iterator.next(); 
      return true; 
     } 
    } 

    public Object getFieldValue(JRField field) throws JRException { 
     if ("this".equals(field.getName())) { 
      return current; 
     } else if (current == null) { 
      return null; 
     } else { 
      Class<?> clazz = current.getClass(); 
      char chars[] = field.getName().toCharArray(); 
      chars[0] = Character.toUpperCase(chars[0]); 
      String name = new String(chars); 
      Method method = null; 
      try { 
       method = clazz.getMethod("get" + name); 
      } catch (NoSuchMethodException e) { 
       if (field.getValueClass() == Boolean.class) { 
        try { 
         method = clazz.getMethod("is" + name); 
        } catch (NoSuchMethodException e1) { 
        } 
       } 
      } 
      if (method == null) { 
       throw new JRException("No getter for field " + name); 
      } 
      try { 
       return method.invoke(current); 
      } catch (Exception e) { 
       throw new JRException("Exception in getter of " + name, e); 
      } 
     } 
    } 
} 

Answer 2

似乎有一個DefaultJasperViewer.jsp，它是在http://jasperforge.org/plugins/espforum/view.php?group_id=112&forumid=102&topicid=35938

提到我認爲這將是更好的寫一個標籤庫。看看這裏：http://seamframework.org/Community/JasperReportsSeam 這與JSF和Seam有關，但可能會給你一些啓發。