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<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>1.9. IO</title><link rel="stylesheet" type="text/css" href="../..//docbook.css" /><meta name="generator" content="DocBook XSL Stylesheets V1.79.1" /><link rel="home" href="../../index.html" title="Netkiller Java 手札" /><link rel="up" href="../../java.html" title="第 1 章 Java" /><link rel="prev" href="../util/index.html" title="1.8. Util" /><link rel="next" href="../lang/reflect/index.html" title="1.10. Reflection 反射" /></head><body><a xmlns="" href="//www.netkiller.cn/">Home</a> |
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<a xmlns="" href="//www.netkiller.cn/home/about.html">About</a><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">1.9. IO</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="../util/index.html">上一页</a> </td><th width="60%" align="center">第 1 章 Java</th><td width="20%" align="right"> <a accesskey="n" href="../lang/reflect/index.html">下一页</a></td></tr></table><hr /></div><table xmlns=""><tr><td><iframe src="//ghbtns.com/github-btn.html?user=netkiller&repo=netkiller.github.io&type=watch&count=true&size=large" height="30" width="170" frameborder="0" scrolling="0" style="width:170px; height: 30px;" allowTransparency="true"></iframe></td><td><iframe src="//ghbtns.com/github-btn.html?user=netkiller&repo=netkiller.github.io&type=fork&count=true&size=large" height="30" width="170" frameborder="0" scrolling="0" style="width:170px; height: 30px;" allowTransparency="true"></iframe></td><td><iframe src="//ghbtns.com/github-btn.html?user=netkiller&type=follow&count=true&size=large" height="30" width="240" frameborder="0" scrolling="0" style="width:240px; height: 30px;" allowTransparency="true"></iframe></td></tr></table><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="index"></a>1.9. IO</h2></div></div></div>
<div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="File.createTempFile"></a>1.9.1. 临时文件</h3></div></div></div>
<pre class="programlisting">
package cn.netkiller.file;
import java.io.File;
import java.io.IOException;
public class CreateTempFileExample
{
public static void main(String[] args)
{
try{
//create a temp file
File temp = File.createTempFile("temp-file-name", ".tmp");
System.out.println("Temp file : " + temp.getAbsolutePath());
}catch(IOException e){
e.printStackTrace();
}
}
}
</pre>
<p>Temp file : C:\Users\mkyong\AppData\Local\Temp\temp-file-name623426.tmp</p>
</div>
<div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="java.io.FileWriter"></a>1.9.2. FileWriter 文本写入文件</h3></div></div></div>
<pre class="programlisting">
import java.io.*;
public class Main {
public static void main(String[] args) {
try {
String str = "SomeMoreTextIsHere";
File newTextFile = new File("thetextfile.txt");
FileWriter fw = new FileWriter(newTextFile);
fw.write(str);
fw.close();
} catch (IOException iox) {
//do stuff with exception
iox.printStackTrace();
}
}
}
</pre>
</div>
<div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="BufferedWriter"></a>1.9.3. BufferedWriter</h3></div></div></div>
<pre class="programlisting">
File file = new File( fileName );
// if file doesnt exists, then create it
if ( ! file.exists( ) )
{
file.createNewFile( );
}
FileWriter fw = new FileWriter( file.getAbsoluteFile( ) );
BufferedWriter bw = new BufferedWriter( fw );
bw.write( text );
bw.close( );
</pre>
</div>
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