我有一种从 JTextArea 获取文本并将其保存在 txt 文件中的方法。 一切正常,但文本保存在一条直线上,带有小空方 block 而不是\n。 我想用\n
替换这些方 block我的代码是:
public void createTxt(){
TxtFilter txt = new TxtFilter();
JFileChooser fSave = new JFileChooser();
fSave.setFileFilter(txt);
int result = fSave.showSaveDialog(this);
if(result == JFileChooser.APPROVE_OPTION){
File sFile = new File(fSave.getSelectedFile()+ ".txt");
String file_name = sFile.getName();
String file_path = sFile.getParent();
try{
if(!sFile.exists()){
BufferedWriter out = new BufferedWriter(new FileWriter(sFile));
FileReader fr = new FileReader(jTextArea1.getText());
BufferedReader br = new BufferedReader(fr);
String line = "";
while((line = br.readLine())!= null){
line = line.replace("o", "\n");
out.write(line);
}
out.close();
JOptionPane.showMessageDialog(null, "Warning file • " + file_name + " • created succesfully in \n" + file_path);
}
else{
一定有问题,因为它创建了 txt 文件,但它总是空的,没有从 JTextArea 获取文本,并且我总是遇到异常
catch(IOException e){
System.out.println("Error");
}
哪里出错了?如何修改代码?
PS 我写了“o”而不是空方 block ,因为我不知道要写什么作为第一个要替换的字符串(或字符)。
谢谢
添加:PrintStackTrace
java.io.FileNotFoundException: sdfdsf (Impossibile trovare il file specificato)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(FileInputStream.java:106)
at java.io.FileInputStream.<init>(FileInputStream.java:66)
at java.io.FileReader.<init>(FileReader.java:41)
at provegrafica.ProvaFramePop.createTxt(ProvaFramePop.java:154)
at provegrafica.ProvaFramePop.jMenuSaveActionPerformed(ProvaFramePop.java:129)
at provegrafica.ProvaFramePop.access$100(ProvaFramePop.java:17)
at provegrafica.ProvaFramePop$2.actionPerformed(ProvaFramePop.java:64)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
at javax.swing.AbstractButton.doClick(AbstractButton.java:357)
at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:809)
at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:850)
at java.awt.Component.processMouseEvent(Component.java:6289)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
at java.awt.Component.processEvent(Component.java:6054)
at java.awt.Container.processEvent(Container.java:2041)
at java.awt.Component.dispatchEventImpl(Component.java:4652)
at java.awt.Container.dispatchEventImpl(Container.java:2099)
at java.awt.Component.dispatchEvent(Component.java:4482)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4577)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168)
at java.awt.Container.dispatchEventImpl(Container.java:2085)
at java.awt.Window.dispatchEventImpl(Window.java:2478)
at java.awt.Component.dispatchEvent(Component.java:4482)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:644)
at java.awt.EventQueue.access$000(EventQueue.java:85)
at java.awt.EventQueue$1.run(EventQueue.java:603)
at java.awt.EventQueue$1.run(EventQueue.java:601)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98)
at java.awt.EventQueue$2.run(EventQueue.java:617)
at java.awt.EventQueue$2.run(EventQueue.java:615)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:614)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
构建成功(总时间:19秒)
添加:代码的其他部分
else{
String message = "File • " + file_name + " • already exist in \n" + file_path + ":\n" + "Do you want to overwrite?";
String title = "Warning";
int reply = JOptionPane.showConfirmDialog(null, message, title, JOptionPane.YES_NO_OPTION);
if(reply == JOptionPane.YES_OPTION){
sFile.delete();
BufferedWriter out = new BufferedWriter(new FileWriter(sFile));
out.write(jTextArea1.getText());
out.close();
JOptionPane.showMessageDialog(null, "File • " + file_name + " • overwritten succesfully in \n" + file_path);
}
}
最佳答案
不要重新发明轮子。
所有文本组件都支持 write(...)
方法。当文本写入文件时,此方法将使用正确的换行符字符串。所以你要做的就是:
textArea.write(...);
关于java - 将方 block 替换为\n,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/8729797/