在平常的开发中我们常常遇到不仅仅只是导出excel报表的情况。有时候也需要导出pdf或者CSV报表。其实原理都差不多。刚开始本来不打算也这篇博客介绍这个的。感觉这篇博客和前面的博客有点雷同。原理基本都一样。但想了想。有时候可能有些童鞋遇到这样的需求会无从下手。所以还是记录下来。帮助一下那些需要这个需求的童鞋。如果你对前面几篇博客的原理都搞明白了。这篇博客你完全可以不看了。仅仅只是代码的实现不同而已。好了。下面我们来看一下需求吧。
这个图就是我们的需求
package com.bzu.csh; import java.io.ByteArrayOutputStream; import java.io.File; import java.io.FileOutputStream; import java.io.OutputStream; import java.util.ArrayList; import java.util.List; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import jxl.Workbook; import jxl.write.Label; import jxl.write.WritableFont; import jxl.write.WritableSheet; import jxl.write.WritableWorkbook; import org.apache.struts2.ServletActionContext; import com.lowagie.text.Document; import com.lowagie.text.Element; import com.lowagie.text.Font; import com.lowagie.text.PageSize; import com.lowagie.text.Paragraph; import com.lowagie.text.pdf.PdfPTable; import com.lowagie.text.pdf.PdfWriter; import com.opensymphony.xwork2.Action; public class downloadAction implements Action { private String downType; public String getDownType() { return downType; } public void setDownType(String downType) { this.downType = downType; } public String execute() { // TODO Auto-generated method stub HttpServletRequest request = ServletActionContext.getRequest(); //HttpServletResponse response = ServletActionContext.getResponse(); //此处模拟数据库读出的数据。在真正的项目中。我们可以通过在session中保存的前端数据集合替换这里 List<Person> list = new ArrayList<Person>(); for (int i = 1; i < 6; i++) { Person person = new Person(); person.setId(String.valueOf(i)); person.setName(String.valueOf((char) (i + 64))); person.setAge(i + 20); person.setSex("man"); list.add(person); } OutputStream os = null; String fname = "personlist"; if ("PDF".equals(downType)) { try { // response.reset(); // os = response.getOutputStream(); FileOutputStream out = new FileOutputStream("d://a.pdf"); Document document = new Document(PageSize.A4, 50, 50, 50, 50); // response.setContentType("application/pdf"); // response.setHeader("Content-disposition", // "attachment;filename=" + fname + ".pdf"); ByteArrayOutputStream baos = new ByteArrayOutputStream(); PdfWriter.getInstance(document, out); document.open(); int cols = list.size(); // 创建PDF表格 PdfPTable table = new PdfPTable(4); // 设置pdf表格的宽度 table.setTotalWidth(500); // 设置是否要固定其宽度 table.setLockedWidth(true); // 表头字体 Font thfont = new Font(); // 设置表头字体的大小 thfont.setSize(7); // 设置表头字体的样式 thfont.setStyle(Font.BOLD); Font tdfont = new Font(); tdfont.setSize(7); tdfont.setStyle(Font.NORMAL); // 设置水平对齐方式 table.setHorizontalAlignment(Element.ALIGN_MIDDLE); // 设置table的header table.addCell(new Paragraph("id", thfont)); table.addCell(new Paragraph("name", thfont)); table.addCell(new Paragraph("sex", thfont)); table.addCell(new Paragraph("age", thfont)); // 循环设置table的每一行 for (int i = 0; i < list.size(); i++) { Person p = (Person) list.get(i); table.addCell(new Paragraph(p.getId(), tdfont)); table.addCell(new Paragraph(p.getName(), tdfont)); table.addCell(new Paragraph(p.getSex(), tdfont)); table.addCell(new Paragraph(String.valueOf(p.getAge()), tdfont)); } document.add(table); document.close(); // baos.writeTo(response.getOutputStream()); baos.close(); } catch (Exception e) { e.printStackTrace(); } } else if ("CSV".equals(downType)) { // response.reset(); // 生成csv文件 //response.setHeader("Content-disposition", "attachment;filename=" // + fname + ".csv"); //response.setContentType("text/csv"); //response.setCharacterEncoding("UTF-8"); FileOutputStream out ; String sep = ","; try { out = new FileOutputStream(new File("d://a.cvs")); //out = response.getOutputStream(); out.write("id".getBytes()); out.write(sep.getBytes()); out.write("name".getBytes()); out.write(sep.getBytes()); out.write("sex".getBytes()); out.write(sep.getBytes()); out.write("age".getBytes()); out.write(sep.getBytes()); out.write(System.getProperty("line.separator").getBytes()); for (int i = 0; i < list.size(); i++) { Person p = (Person) list.get(i); out.write(p.getId().getBytes()); out.write((sep + "/t").getBytes()); out.write(p.getName().getBytes()); out.write((sep + "/t").getBytes()); out.write(p.getSex().getBytes()); out.write((sep + "/t").getBytes()); out.write(String.valueOf(p.getAge()).getBytes()); out.write((sep + "/t").getBytes()); out.write(sep.getBytes()); out.write(System.getProperty("line.separator").getBytes()); } out.flush(); //out.cloute(); } catch (Exception e) { e.printStackTrace(); } } else if (downType.equals("Excel")) { //response.reset(); // 生成xls文件 //response.setContentType("application/vnd.ms-excel"); //response.setHeader("Content-disposition", "attachment;filename=" // + fname + ".xls"); try { //os = response.getOutputStream(); Label l = null; WritableWorkbook wbook = Workbook.createWorkbook(new File( "d://a.xls")); // 写sheet名称 WritableSheet sheet = wbook.createSheet("my excel file", 0); jxl.write.WritableFont wfc4 = new jxl.write.WritableFont( WritableFont.ARIAL, 9, WritableFont.NO_BOLD, false, jxl.format.UnderlineStyle.NO_UNDERLINE, jxl.format.Colour.BLACK); jxl.write.WritableCellFormat wcfFC4 = new jxl.write.WritableCellFormat( wfc4); wcfFC4.setBackground(jxl.format.Colour.LIGHT_GREEN); int col = 0; sheet.setColumnView(col, 12); l = new Label(col, 0, "id", wcfFC4); sheet.addCell(l); col++; sheet.setColumnView(col, 12); l = new Label(col, 0, "name", wcfFC4); sheet.addCell(l); col++; sheet.setColumnView(col, 12); l = new Label(col, 0, "sex", wcfFC4); sheet.addCell(l); col++; sheet.setColumnView(col, 12); l = new Label(col, 0, "age", wcfFC4); sheet.addCell(l); // 设置字体样式 jxl.write.WritableFont wfc5 = new jxl.write.WritableFont( WritableFont.ARIAL, 9, WritableFont.NO_BOLD, false, jxl.format.UnderlineStyle.NO_UNDERLINE, jxl.format.Colour.BLACK); jxl.write.WritableCellFormat wcfFC5 = new jxl.write.WritableCellFormat( wfc5); for (int i = 0; i < list.size(); i++) { Person p = (Person) list.get(i); int j = 0; l = new Label(j, i + 1, p.getId(), wcfFC5); sheet.addCell(l); j++; l = new Label(j, i + 1, p.getName(), wcfFC5); sheet.addCell(l); j++; l = new Label(j, i + 1, p.getSex(), wcfFC5); sheet.addCell(l); j++; l = new Label(j, i + 1, String.valueOf(p.getAge()), wcfFC5); sheet.addCell(l); j++; } // 写入流中 wbook.write(); wbook.close(); } catch (Exception e) { e.printStackTrace(); } } return SUCCESS; } }
操作很简单。选择好要导出的报表格式。点击导出按钮。我们在d盘相应的位置就会生成相应的报表。
OK，介绍完毕。希望可以帮助有这个需求的朋友。
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