java操作office和pdf文件（四）页面列表导出cvs，excel、pdf报表.
2012-11-26 12:55
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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
就像你看到的一样。我们的需求就是列表内容是从数据库中读出来的。而我们想把从数据库得到的这个列表导出pdf、csv、excel报表。也不多说了。看代码吧：
<PRE class=java name="code">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; <
4000
/li>
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;
}
}
</PRE><BR><BR>
这个图就是我们的需求
就像你看到的一样。我们的需求就是列表内容是从数据库中读出来的。而我们想把从数据库得到的这个列表导出pdf、csv、excel报表。也不多说了。看代码吧：
<PRE class=java name="code">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; <
4000
/li>
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;
}
}
</PRE><BR><BR>
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