创建临时文件

import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.io.File;import java.io.FileWriter;import java.io.IOException;import java.io.PrintWriter;import javax.swing.JButton;import javax.swing.JFrame;public class TestClass implements ActionListener {private File tempPath;public static void main(String args[]){TestClass ttf = new TestClass();ttf.init();ttf.createUI();}public void createUI(){JFrame frame = new JFrame();JButton jb = new JButton("创建临时文件");jb.addActionListener(this);frame.add(jb,"North");frame.setSize(200,100);frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.setVisible(true);}public void init(){tempPath = new File("temp");if(!tempPath.exists() || !tempPath.isDirectory()){tempPath.mkdir();  //如果不存在，则创建该文件夹}}public void actionPerformed(ActionEvent e){try{//在tempPath路径下创建临时文件"mytempfileXXXX.tmp"//XXXX 是系统自动产生的随机数, tempPath对应的路径应事先存在File tempFile=File.createTempFile("mytempfile",".txt",null);System.out.println(tempFile.getAbsolutePath());FileWriter fout=new FileWriter(tempFile);PrintWriter out=new PrintWriter(fout);out.println("some info!" );out.close(); //注意：如无此关闭语句，文件将不能删除//tempFile.delete(); tempFile.deleteOnExit();}catch(IOException e1){System.out.println(e1);}}}