Swing表格数据转xls文档

花了一下午的时间终于实现了Swing表格数据转xls文档与读取xls文档数据。

接下来上代码

1.弹出文件,目录选择框

exportBtn.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {
                String name = "数据.xls";
                String defaultPath = "D://temp";
              //构造文件保存对话框
                JFileChooser chooser = new JFileChooser();
                chooser.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
                chooser.setDialogType(JFileChooser.SAVE_DIALOG);
                chooser.setMultiSelectionEnabled(false);
                chooser.setAcceptAllFileFilterUsed(false);
                chooser.setDialogTitle("保存数据文件");

                //设置默认路径
                File defaultFile = new File(defaultPath+"//data");
                if(!defaultFile.exists()){
                    defaultFile.mkdirs();
                }
                chooser.setCurrentDirectory(new File(defaultPath));
                //打开对话框
                int result = chooser.showSaveDialog(getWindow());//null

                //文件确定
                if(result==JFileChooser.APPROVE_OPTION) {
                    String outPath = chooser.getSelectedFile().getAbsolutePath();
                    File f = new File(outPath);
                    if(f.isDirectory()) {
                        outPath = outPath+"\\"+name;
                    }
                    if(new File(outPath).exists()){
                        int b = DialogUtils.showYesNoOptionDialog(getWindow(), "文件已经存在,是否要覆盖该文件?","操作确认");
                        if(b!=0){
                            return;
                        }
                    }

                    File file = new File(outPath);
                    ExcelExporter ee = new ExcelExporter();
                    try {
                        ee.exportTable(xTable, file);
                    } catch (IOException e1) {
                        new RuntimeException(e1);
                    }
                }
            }

        });

2.表格数据导出

package net.doublecom.sdk.tool.wirelessinfo.view;

import java.io.*;
import org.freeabc.client.core.component.table.XTable;

public class ExcelExporter  {
    public ExcelExporter() { }  

    public void exportTable(XTable<?> xtable, File file) throws IOException {  //Xtable自定义组件，也可换成Jtable　　　　　// TableModel tableModel = new JTable().getModel();　　　　　// tableModel.getColumnCount()

        FileWriter out = new FileWriter(file);  

        for(int i=0; i < xtable.getColumnCount(); i++) {
            if("名称.equals(xtable.getColumnName(i))||"年龄".equals(xtable.getColumnName(i)))
            out.write(xtable.getColumnName(i) + "\t");
        }
        out.write("\n");
        for(int i=0; i< xtable.getRowCount(); i++) {
            for(int j=0; j < xtable.getColumnCount(); j++) {
                if("名称".equals(xtable.getColumnName(j))||"年龄".equals(xtable.getColumnName(j)))
                    out.write(xtable.getValueAt(i,j).toString()+"\t");
            }
            out.write("\n");
        }
        out.close();
        System.out.println("write out to: " + file);
    }  

} 

3.读取xls文档数据

    importBtn.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {

                String defaultPath = "D://temp//data//";
              //构造文件保存对话框
                JFileChooser chooser = new JFileChooser();
                chooser.setFileSelectionMode(JFileChooser.FILES_ONLY);
                chooser.setDialogType(JFileChooser.SAVE_DIALOG);
                chooser.setMultiSelectionEnabled(false);
                chooser.setAcceptAllFileFilterUsed(false);
                chooser.setDialogTitle("加载数据文件");

                //设置默认路径
                File defaultFile = new File(defaultPath);
                if(defaultFile.exists()){
                    chooser.setCurrentDirectory(new File(defaultPath));
                }
                //取得文件名输入框设置指定格式
                chooser.addChoosableFileFilter(new FileFilter() {
                    @Override
                    public String getDescription() {
                        return "Excel文件(*.xls)";
                    }
                    @Override
                    public boolean accept(File f) {
                        if (f.getName().endsWith("xls") || f.isDirectory()) {
                             return true;
                        }else{
                            return false;
                        }
                    }
                });
                //打开对话框
                int result = chooser.showSaveDialog(getWindow());//null
                //文件确定
                if(result==JFileChooser.APPROVE_OPTION) {
                    String outPath = chooser.getSelectedFile().getAbsolutePath();
                    File file = new File(outPath);
                    try {
                         StringBuffer sb = new StringBuffer();
                         List<String[]> dataArrs = new ArrayList<String[]>();
                         FileInputStream fis = new FileInputStream(file);
                         //InputStream is = fis.getInputStream();
                         BufferedReader reader = new BufferedReader(new InputStreamReader(fis,"gb2312"));
                         reader.readLine();//第一行信息，为标题信息，不用,如果需要，注释掉
                         String line = null;
                         while((line=reader.readLine())!=null){
                            String item[] = line.split("\\t");//xls格式文件为空格分隔符文件，这里根据逗号切分
                            if(item.length!=2)
                            continue;
                            dataArrs.add(item);
                         }
                         for(String[] data:dataArrs) {
                             if(data.length>=2) {
                                 sb.append("name="+data[0]);
                                 sb.append(" age="+data[1]+";");
                             }
                         }

                    reader.close();
                    } catch (IOException e1) {
                        new RuntimeException(e1);
                    }
                }
            }
        });

原文地址：https://www.cnblogs.com/free-discipline/p/11605841.html