java另存為
① java編寫的記事本的保存和另存為功能
你要的關鍵程序代碼：。（源文件超過10000字，無法粘全在這，要的話，加我）if(e.getActionCommand()=="保存"||e.getActionCommand()=="保存為")
{
JFileChooser chooser=new JFileChooser(); //創建文件選擇對話框
int result=chooser.showSaveDialog(frame);
if(result==JFileChooser.APPROVE_OPTION)
{
try
{
FileWriter fout = new FileWriter(chooser.getSelectedFile()); //向磁碟中寫文件
fout.write(jtextpane.getText()+"\r\n");
fout.close();
}
catch (IOException ioex)
{
}
}
}執行效果：
② java如何另存導出Excel
1./**
* 出險信息導出到excel（fc）
* @param mapping
* @param form
* @param request
* @param response
* @throws IOException
*/
public void exportActoExcel(ActionMapping mapping, ActionForm form ,
HttpServletRequest request,HttpServletResponse response) throws IOException {
ActionErrors errors = new ActionErrors();
AcExcelBusi acBusi = new AcExcelBusi();
AccidentRecordForm arForm= (AccidentRecordForm) form;
AccidentRecordBusi arBusi = new AccidentRecordBusi();
// ////查詢條件
FwUsers sessUser = (FwUsers)request.getSession().getAttribute(ConstValues.SESS_USER_MANAGE);
Map<String,Object> cisMap = arBusi.getTodoPageList(arForm,sessUser,errors);
List AcList = null;// 當頁的記錄
if (null != cisMap) {
AcList = (List) cisMap.get("list");
}
//導出excel的路徑、文件名
String uuid = UUID.create("exp");
String path = request.getSession().getServletContext().getRealPath("/") + ConstValues.EXP_PATH_EXCEL + uuid + ".xls";
acBusi.exprotAcExcel(AcList, path,request);
response.sendRedirect("stdownload.jsp?path=" + path );
}
③ 親，如何是實現java的另存為
代碼如下:
function runCode(obj) {
var winname = window.open('', "_blank", '');
winname.document.open('text/html', 'replace');
winname.opener = null // 防止代碼對父頁面修改
winname.document.write(obj.value);
winname.document.close();
}
function saveCode(obj) {
var winname = window.open('', '_blank', 'top=10000');
winname.document.open('text/html', 'replace');
winname.document.write(obj.value);
winname.document.execCommand('saveas','','');
winname.close();
}
function oCopy(obj){
obj.select();
js=obj.createTextRange();
js.execCommand("Copy");
alert("提示：代碼已經被成功復制！");
}把代碼打上去就能成功實現另存為。
④ 用java文件對話框實現文件另存為
我覺得用一個文件復制的類就可以實現備份，我大概寫了一個，基本功能可以實現，但是總覺得好怪
你可以給JTextField t1 一個初始路徑,那樣,如果每次都是備份同一個文件直接點保存選路徑就可以,如果想備份其他文件再選其他文件就可以了
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.Calendar;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextField;
public class BakTo extends JFrame implements ActionListener {
JLabel l1 = new JLabel("原始文件");
JTextField t1 = new JTextField(40);
JButton b1 = new JButton("選擇");
JLabel l2 = new JLabel("保存目錄");
JTextField t2 = new JTextField(40);
JButton b2 = new JButton("保存");
JFileChooser j1 = new JFileChooser();
JFileChooser j2 = new JFileChooser();
static File fileFlag = new File("");
public BakTo() {
setBounds(200, 200, 600, 140);
setLayout(new FlowLayout());
add(l1);
add(t1);
add(b1);
add(l2);
add(t2);
add(b2);
b1.addActionListener(this);
b2.addActionListener(this);
setResizable(false);
setVisible(true);
validate();
}
public void actionPerformed(ActionEvent e) {
try {
if (e.getSource() == b1) {
int n = j1.showOpenDialog(null);
String filename = j1.getSelectedFile().toString();
if (n == JFileChooser.APPROVE_OPTION) {
t1.setText(filename);
fileFlag = new File(filename);
}
}
else if (e.getSource() == b2) {
j2.setCurrentDirectory(fileFlag);// 設置打開對話框的默認路徑
j2.setSelectedFile(fileFlag);// 設置選中原來的文件
int n = j2.showSaveDialog(null);
String filename2 = j2.getSelectedFile().toString();
if(filename2.indexOf(".")!=-1){
filename2=filename2.substring(0,filename2.indexOf("."));
}
// 以下兩句是獲得原文件的擴展名
int flag = t1.getText().lastIndexOf(".");
String kuozhan = t1.getText().substring(flag);
String date = getDate();// 取得當前日期
if (n == JFileChooser.APPROVE_OPTION) {
t2.setText(filename2 +date+ kuozhan);// 把日期和擴展名添加到原來文件的後面
}
int b;
char[] t = new char[25];
// 這里我改用了文件流
FileInputStream input = new FileInputStream(t1.getText());
FileOutputStream output = new FileOutputStream(filename2+date
+ kuozhan);// 把擴展名添加到原來文件的後面
int in = input.read();
while (in != -1) {
output.write(in);
in = input.read();
}
input.close();
output.close();
}
} catch (Exception x) {
System.out.println(x);
}
}
public String getDate() {
Calendar rightNow = Calendar.getInstance();
System.out.println(rightNow.toString());
int year = rightNow.YEAR;
int date = rightNow.DATE;
int month = rightNow.MONTH + 1;
String d = year + "年" + month + "月" + date + "日";
return d;
}
public static void main(String args[]) {
BakTo c1 = new BakTo();
}
}
⑤ java中如何實現點擊下載出現另存為的對話框
文件類的讀寫，要用流進行操作
⑥ 如何用Java實現另存為
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.Calendar;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextField;
public class BakTo extends JFrame implements ActionListener {
JLabel l1 = new JLabel("原始文件");
JTextField t1 = new JTextField(40);
JButton b1 = new JButton("選擇");
JLabel l2 = new JLabel("保存目錄");
JTextField t2 = new JTextField(40);
JButton b2 = new JButton("保存");
JFileChooser j1 = new JFileChooser();
JFileChooser j2 = new JFileChooser();
static File fileFlag = new File("");
public BakTo() {
setBounds(200, 200, 600, 140);
setLayout(new FlowLayout());
add(l1);
add(t1);
add(b1);
add(l2);
add(t2);
add(b2);
b1.addActionListener(this);
b2.addActionListener(this);
setResizable(false);
setVisible(true);
validate();
}
public void actionPerformed(ActionEvent e) {
try {
if (e.getSource() == b1) {
int n = j1.showOpenDialog(null);
String filename = j1.getSelectedFile().toString();
if (n == JFileChooser.APPROVE_OPTION) {
t1.setText(filename);
fileFlag = new File(filename);
}
}
else if (e.getSource() == b2) {
j2.setCurrentDirectory(fileFlag);// 設置打開對話框的默認路徑
j2.setSelectedFile(fileFlag);// 設置選中原來的文件
int n = j2.showSaveDialog(null);
String filename2 = j2.getSelectedFile().toString();
if(filename2.indexOf(".")!=-1){
filename2=filename2.substring(0,filename2.indexOf("."));
}
// 以下兩句是獲得原文件的擴展名
int flag = t1.getText().lastIndexOf(".");
String kuozhan = t1.getText().substring(flag);
String date = getDate();// 取得當前日期
if (n == JFileChooser.APPROVE_OPTION) {
t2.setText(filename2 +date+ kuozhan);// 把日期和擴展名添加到原來文件的後面
}
int b;
char[] t = new char[25];
// 這里我改用了文件流
FileInputStream input = new FileInputStream(t1.getText());
FileOutputStream output = new FileOutputStream(filename2+date
+ kuozhan);// 把擴展名添加到原來文件的後面
int in = input.read();
while (in != -1) {
output.write(in);
in = input.read();
}
input.close();
output.close();
}
} catch (Exception x) {
System.out.println(x);
}
}
public String getDate() {
Calendar rightNow = Calendar.getInstance();
System.out.println(rightNow.toString());
int year = rightNow.YEAR;
int date = rightNow.DATE;
int month = rightNow.MONTH + 1;
String d = year + "年" + month + "月" + date + "日";
return d;
}
public static void main(String args[]) {
BakTo c1 = new BakTo();
}
}