JButton clean = new JButton("BUTTON1");
clean.setBackground(Color.GREEN);
clean.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
try{
String path = "路徑";
FileReader fr= new FileReader(path);
BufferedReader br = new BufferedReader(fr);
StringBuffer sb = new StringBuffer();
FileWriter fw = null;
String newContent = "";
String line;
while((line = br.readLine()) != null){
newContent = newContent+line.replace("尋找字串","取代字串")+"\r\n";
}
fw = new FileWriter(path);
fw.write(newContent);
fr.close();
br.close();
fw.close();
}
catch(IOException o){}
}
});
import java.io.*;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
public class test{
public static void main(String[] args)throws IOException{
String path = "C:\\123.txt";//文件路徑
FileReader fr= new FileReader(path);
BufferedReader br = new BufferedReader(fr);
StringBuffer sb = new StringBuffer();
FileWriter fw = null;
String line;
String newContent = "";//用來暫存改動後的內容
while((line = br.readLine()) != null)//逐行讀取，該行的內容存進line
{
newContent = newContent+line.replace("abc","egg")+"\n";//已暫存的內容加上line(該行內容)且如果遇到abc就取代成egg，並且換行。註1
}
fw = new FileWriter(path);//建立新檔案，路徑為path
fw.write(newContent);//將暫存內容寫進檔案中
fr.close();
br.close();
fw.close();
}
}