java导出数据Excel总结

//创建获取到JFileChooser的文件名的JTextField
public JTextField getTextField(Container c){
JTextField textField = null;
for (int i = 0; i < c.getComponentCount(); i++) {
Component cnt = c.getComponent(i);
if (cnt instanceof JTextField) {
return (JTextField) cnt;
}
if (cnt instanceof Container) {
textField = getTextField((Container) cnt);
if (textField != null) {
return textField;
}
}
}
return textField;
}

//导出结果
public String writeExcel(List<WxToken> all,HttpServletResponse response){
try {
// 定义工作薄
//用户自定义选择文件夹
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
JFileChooser chooser=new JFileChooser();
chooser.setFileSelectionMode(JFileChooser.FILES_ONLY);
chooser.setDialogType(JFileChooser.SAVE_DIALOG);
chooser.setMultiSelectionEnabled(false);
chooser.setAcceptAllFileFilterUsed(false);
chooser.setDialogTitle("保存数据文件");
//JFileChooser.showSaveDialog()设立默认文件名
JTextField fileNameField = getTextField(chooser);
fileNameField.setText(UUID.randomUUID().toString());

int result= chooser.showSaveDialog(null);
//设置取消
if (result != JFileChooser.APPROVE_OPTION) {
System.out.println("你已取消并关闭了窗口！");
return "取消数据导出";
}
String path=chooser.getSelectedFile().getPath()+".xls";

//String path = "e:\\" + UUID.randomUUID().toString() + ;
WritableWorkbook book = Workbook.createWorkbook(new File(path));

// 定义工作表,参数0表示第一个工作表
WritableSheet sheet = book.createSheet("微信账号信息表", 0);
sheet.setColumnView(0,10);
sheet.setColumnView(1,20);
sheet.setColumnView(2,20);
sheet.setColumnView(3,20);
sheet.setColumnView(4,20);
sheet.setColumnView(5,20);
sheet.setColumnView(6,20);
sheet.setColumnView(7,20);
sheet.setColumnView(8,10);

// 3.定义单元格标题及其样式:
WritableCellFormat headFormat = new WritableCellFormat(
new WritableFont(WritableFont.ARIAL, 12, WritableFont.BOLD,
false, UnderlineStyle.NO_UNDERLINE,
jxl.format.Colour.BLACK));
headFormat.setAlignment(Alignment.CENTRE); // 居中对齐
headFormat.setVerticalAlignment(VerticalAlignment.CENTRE);// 居中对齐
headFormat.setBorder(Border.ALL, BorderLineStyle.THIN);//设置边框线
headFormat.setBackground(jxl.format.Colour.GREEN);//设置背景颜色
// 单元格语法：Label("列索引","行索引","单元格内容","格式");
Label label0 = new Label(0, 0, "账号类型",headFormat);

// 将单元格添加到工作表中
sheet.addCell(label0);

// 填充数据:
int i = 1;
//定义内容样式
WritableCellFormat contentFormat = new WritableCellFormat();
contentFormat.setAlignment(Alignment.CENTRE);
contentFormat.setVerticalAlignment(VerticalAlignment.CENTRE);

for (WxToken wt : all) {

//账号类型
Label type=null;
if (wt.getType()==0) {
type = new Label(0,i,"服务号");//按字符串方式处理（会在单元格上生成绿色标记）
}
if (wt.getType()==1) {
type = new Label(0,i,"订阅号");//按字符串方式处理（会在单元格上生成绿色标记）
}

// 添加备注
WritableCellFeatures wcf = new WritableCellFeatures();//备注
wcf.setComment("备注："+wt.getRemark());
wxName.setCellFeatures(wcf);

sheet.addCell(type);

i++;
}
book.write();
book.close();
return "数据导出成功";
}catch (Exception e) {
e.printStackTrace();
return "数据导出失败";
}
}

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