文件拷贝代码,Java代码库,德仔网

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【Java】文件拷贝
作者: / 发布于2011/1/14/ 522
<div><span style="color: #0000ff">import</span><span style="color: #000000"> java.io.</span><span style="color: #000000">*</span><span style="color: #000000">; 
</span><span style="color: #0000ff">import</span><span style="color: #000000"> java.util.ArrayList; 
</span><span style="color: #0000ff">import</span><span style="color: #000000"> java.util.List; 
</span><span style="color: #0000ff">public</span><span style="color: #000000"> </span><span style="color: #0000ff">class</span><span style="color: #000000"> FileCopy { 
</span><span style="color: #0000ff">private</span><span style="color: #000000"> String message </span><span style="color: #000000">=</span><span style="color: #000000"> </span><span style="color: #000000">""</span><span style="color: #000000">; 
</span><span style="color: #0000ff">public</span><span style="color: #000000"> String getMessage() { 
 </span><span style="color: #0000ff">return</span><span style="color: #000000"> message; 
} 
</span><span style="color: #0000ff">public</span><span style="color: #000000"> </span><span style="color: #0000ff">void</span><span style="color: #000000"> setMessage(String message) { 
 </span><span style="color: #0000ff">this</span><span style="color: #000000">.message </span><span style="color: #000000">=</span><span style="color: #000000"> message; 
} 
</span><span style="color: #008000">/**</span><span style="color: #008000"> 
 * 将源文件拷贝到目标文件 
 * 
 * </span><span style="color: #808080">@param</span><span style="color: #008000"> src 
 * 写源文件地址，需文件名 
 * </span><span style="color: #808080">@param</span><span style="color: #008000"> des 
 * 写目标文件地址，无需文件名 
 </span><span style="color: #008000">*/</span><span style="color: #000000"> 
</span><span style="color: #0000ff">public</span><span style="color: #000000"> </span><span style="color: #0000ff">boolean</span><span style="color: #000000"> copyFile(String src, String des) { 
 File srcFile </span><span style="color: #000000">=</span><span style="color: #000000"> </span><span style="color: #0000ff">new</span><span style="color: #000000"> File(src); 
 File desDir </span><span style="color: #000000">=</span><span style="color: #000000"> </span><span style="color: #0000ff">new</span><span style="color: #000000"> File(des); 
 File desFile </span><span style="color: #000000">=</span><span style="color: #000000"> </span><span style="color: #0000ff">new</span><span style="color: #000000"> File(des </span><span style="color: #000000">+</span><span style="color: #000000"> </span><span style="color: #000000">"</span><span style="color: #000000">/</span><span style="color: #000000">"</span><span style="color: #000000"> </span><span style="color: #000000">+</span><span style="color: #000000"> srcFile.getName()); 
 </span><span style="color: #008000">//</span><span style="color: #008000"> 判断源文件是否存在 </span><span style="color: #008000">
</span><span style="color: #000000"> </span><span style="color: #0000ff">if</span><span style="color: #000000"> (</span><span style="color: #000000">!</span><span style="color: #000000">srcFile.exists()) { 
 </span><span style="color: #0000ff">this</span><span style="color: #000000">.setMessage(</span><span style="color: #000000">"</span><span style="color: #000000">源文件不存在！</span><span style="color: #000000">"</span><span style="color: #000000">); 
 </span><span style="color: #0000ff">return</span><span style="color: #000000"> </span><span style="color: #0000ff">false</span><span style="color: #000000">; 
 } </span><span style="color: #0000ff">else</span><span style="color: #000000"> </span><span style="color: #0000ff">if</span><span style="color: #000000"> (</span><span style="color: #000000">!</span><span style="color: #000000">srcFile.isFile()) { 
 </span><span style="color: #0000ff">this</span><span style="color: #000000">.setMessage(</span><span style="color: #000000">"</span><span style="color: #000000">源文件格式错！</span><span style="color: #000000">"</span><span style="color: #000000">); 
 </span><span style="color: #0000ff">return</span><span style="color: #000000"> </span><span style="color: #0000ff">false</span><span style="color: #000000">; 
 } 
 </span><span style="color: #008000">//</span><span style="color: #008000"> 判断源文件是否存在 </span><span style="color: #008000">
</span><span style="color: #000000"> </span><span style="color: #0000ff">if</span><span style="color: #000000"> (</span><span style="color: #000000">!</span><span style="color: #000000">desDir.exists()) { 
 </span><span style="color: #0000ff">this</span><span style="color: #000000">.setMessage(</span><span style="color: #000000">"</span><span style="color: #000000">目标目录不存在！</span><span style="color: #000000">"</span><span style="color: #000000">); 
 </span><span style="color: #0000ff">return</span><span style="color: #000000"> </span><span style="color: #0000ff">false</span><span style="color: #000000">; 
 } </span><span style="color: #0000ff">else</span><span style="color: #000000"> </span><span style="color: #0000ff">if</span><span style="color: #000000"> (</span><span style="color: #000000">!</span><span style="color: #000000">desDir.isDirectory()) { 
 </span><span style="color: #0000ff">this</span><span style="color: #000000">.setMessage(</span><span style="color: #000000">"</span><span style="color: #000000">不是有效的目录！</span><span style="color: #000000">"</span><span style="color: #000000">); 
 </span><span style="color: #0000ff">return</span><span style="color: #000000"> </span><span style="color: #0000ff">false</span><span style="color: #000000">; 
 } 
 BufferedReader reader </span><span style="color: #000000">=</span><span style="color: #000000"> </span><span style="color: #0000ff">null</span><span style="color: #000000">; 
 BufferedWriter writer </span><span style="color: #000000">=</span><span style="color: #000000"> </span><span style="color: #0000ff">null</span><span style="color: #000000">; 
 String str; 
 </span><span style="color: #0000ff">try</span><span style="color: #000000"> { 
 reader </span><span style="color: #000000">=</span><span style="color: #000000"> </span><span style="color: #0000ff">new</span><span style="color: #000000"> BufferedReader(</span><span style="color: #0000ff">new</span><span style="color: #000000"> FileReader(srcFile)); 
 writer </span><span style="color: #000000">=</span><span style="color: #000000"> </span><span style="color: #0000ff">new</span><span style="color: #000000"> BufferedWriter(</span><span style="color: #0000ff">new</span><span style="color: #000000"> FileWriter(desFile)); 
 </span><span style="color: #008000">//</span><span style="color: #008000"> 判断目标文件是否存在及其格式，不存在就创建，格式不对先删除，存在就替代 </span><span style="color: #008000">
</span><span style="color: #000000"> </span><span style="color: #0000ff">if</span><span style="color: #000000"> (</span><span style="color: #000000">!</span><span style="color: #000000">desFile.exists() </span><span style="color: #000000">||</span><span style="color: #000000"> </span><span style="color: #000000">!</span><span style="color: #000000">desFile.isFile()) { 
 </span><span style="color: #0000ff">if</span><span style="color: #000000"> (desFile.exists()) { 
 desFile.delete(); 
 } 
 desFile.createNewFile(); 
 } 
 </span><span style="color: #008000">//</span><span style="color: #008000"> 从源文件读取数据，并写入目标文件 </span><span style="color: #008000">
</span><span style="color: #000000"> str </span><span style="color: #000000">=</span><span style="color: #000000"> reader.readLine(); 
 </span><span style="color: #0000ff">while</span><span style="color: #000000"> (str </span><span style="color: #000000">!=</span><span style="color: #000000"> </span><span style="color: #0000ff">null</span><span style="color: #000000">) { 
 writer.write(str); 
 writer.newLine(); 
 str </span><span style="color: #000000">=</span><span style="color: #000000"> reader.readLine(); 
 } 
 } </span><span style="color: #0000ff">catch</span><span style="color: #000000"> (IOException e) { 
 </span><span style="color: #0000ff">this</span><span style="color: #000000">.setMessage(e.getMessage()); 
 </span><span style="color: #0000ff">return</span><span style="color: #000000"> </span><span style="color: #0000ff">false</span><span style="color: #000000">; 
 } </span><span style="color: #0000ff">finally</span><span style="color: #000000"> { 
 </span><span style="color: #0000ff">if</span><span style="color: #000000"> (reader </span><span style="color: #000000">!=</span><span style="color: #000000"> </span><span style="color: #0000ff">null</span><span style="color: #000000">) { 
 </span><span style="color: #0000ff">try</span><span style="color: #000000"> { 
 reader.close(); 
 } </span><span style="color: #0000ff">catch</span><span style="color: #000000"> (IOException e) { 
 </span><span style="color: #0000ff">this</span><span style="color: #000000">.setMessage(e.getMessage()); 
 } 
 } 
 </span><span style="color: #0000ff">if</span><span style="color: #000000"> (writer </span><span style="color: #000000">!=</span><span style="color: #000000"> </span><span style="color: #0000ff">null</span><span style="color: #000000">) { 
 </span><span style="color: #0000ff">try</span><span style="color: #000000"> { 
 writer.close(); 
 } </span><span style="color: #0000ff">catch</span><span style="color: #000000"> (IOException e) { 
 </span><span style="color: #0000ff">this</span><span style="color: #000000">.setMessage(e.getMessage()); 
 } 
 } 
 } 
 </span><span style="color: #0000ff">return</span><span style="color: #000000"> </span><span style="color: #0000ff">true</span><span style="color: #000000">; 
} 
</span><span style="color: #0000ff">private</span><span style="color: #000000"> List fileList </span><span style="color: #000000">=</span><span style="color: #000000"> </span><span style="color: #0000ff">new</span><span style="color: #000000"> ArrayList(); 

</span><span style="color: #008000">/**</span><span style="color: #008000"> 
 * 列出所有文件 
 * </span><span style="color: #808080">@param</span><span style="color: #008000"> srcFile 
 </span><span style="color: #008000">*/</span><span style="color: #000000"> 
</span><span style="color: #0000ff">private</span><span style="color: #000000"> </span><span style="color: #0000ff">void</span><span style="color: #000000"> file(File srcFile) { 
 </span><span style="color: #0000ff">if</span><span style="color: #000000"> (srcFile.isDirectory()) { 
 String[] files </span><span style="color: #000000">=</span><span style="color: #000000"> srcFile.list(); 
 
 </span><span style="color: #0000ff">for</span><span style="color: #000000"> (</span><span style="color: #0000ff">int</span><span style="color: #000000"> i </span><span style="color: #000000">=</span><span style="color: #000000"> </span><span style="color: #000000">0</span><span style="color: #000000">; i </span><span style="color: #000000"><</span><span style="color: #000000"> files.length; i</span><span style="color: #000000">++</span><span style="color: #000000">) { 
 File f </span><span style="color: #000000">=</span><span style="color: #000000"> </span><span style="color: #0000ff">new</span><span style="color: #000000"> File(srcFile </span><span style="color: #000000">+</span><span style="color: #000000"> </span><span style="color: #000000">"</span><span style="color: #000000">/</span><span style="color: #000000">"</span><span style="color: #000000"> </span><span style="color: #000000">+</span><span style="color: #000000"> files[i]); 
 </span><span style="color: #008000">//</span><span style="color: #008000"> 如果是文件加入列表，否则递归列出 </span><span style="color: #008000">
</span><span style="color: #000000"> </span><span style="color: #0000ff">if</span><span style="color: #000000"> (f.isFile()) { 
 fileList.add(f); 
 } </span><span style="color: #0000ff">else</span><span style="color: #000000"> 
 file(f); 
 } 
 }</span><span style="color: #0000ff">else</span><span style="color: #000000"> </span><span style="color: #0000ff">this</span><span style="color: #000000">.setMessage(srcFile.getAbsolutePath()</span><span style="color: #000000">+</span><span style="color: #000000">"</span><span style="color: #000000">不是目录</span><span style="color: #000000">"</span><span style="color: #000000">); 
} 
</span><span style="color: #008000">/**</span><span style="color: #008000"> 
 * 建立目录 
 * </span><span style="color: #808080">@param</span><span style="color: #008000"> des 
 * </span><span style="color: #808080">@throws</span><span style="color: #008000"> IOException 
 </span><span style="color: #008000">*/</span><span style="color: #0000ff">private</span><span style="color: #000000"> </span><span style="color: #0000ff">void</span><span style="color: #000000"> mkdir(File des) { 
 </span><span style="color: #0000ff">if</span><span style="color: #000000"> (</span><span style="color: #000000">!</span><span style="color: #000000">des.exists() </span><span style="color: #000000">||</span><span style="color: #000000"> </span><span style="color: #000000">!</span><span style="color: #000000">des.isDirectory()) { 
 mkdir(des.getParentFile()); 
 </span><span style="color: #0000ff">if</span><span style="color: #000000"> (des.exists()) { 
 des.delete(); 
 } 
 des.mkdir(); 
 } 
} 
</span><span style="color: #008000">/**</span><span style="color: #008000"> 
 * 复制目录 将源目录下所有文件拷贝到目标目录下 
 * </span><span style="color: #808080">@param</span><span style="color: #008000"> src 源目录 
 * </span><span style="color: #808080">@param</span><span style="color: #008000"> des 目标目录 
 </span><span style="color: #008000">*/</span><span style="color: #000000"> 
</span><span style="color: #0000ff">public</span><span style="color: #000000"> </span><span style="color: #0000ff">boolean</span><span style="color: #000000"> copyDir(String src, String des) { 
 File srcFile </span><span style="color: #000000">=</span><span style="color: #000000"> </span><span style="color: #0000ff">new</span><span style="color: #000000"> File(src); 
 </span><span style="color: #0000ff">if</span><span style="color: #000000"> (</span><span style="color: #000000">!</span><span style="color: #000000">srcFile.exists()) { 
 </span><span style="color: #0000ff">this</span><span style="color: #000000">.setMessage(</span><span style="color: #000000">"</span><span style="color: #000000">源目录不存在！</span><span style="color: #000000">"</span><span style="color: #000000">); 
 </span><span style="color: #0000ff">return</span><span style="color: #000000"> </span><span style="color: #0000ff">false</span><span style="color: #000000">; 
 } </span><span style="color: #0000ff">else</span><span style="color: #000000"> </span><span style="color: #0000ff">if</span><span style="color: #000000"> (</span><span style="color: #000000">!</span><span style="color: #000000">srcFile.isDirectory()) { 
 </span><span style="color: #0000ff">this</span><span style="color: #000000">.setMessage(src</span><span style="color: #000000">+</span><span style="color: #000000">"</span><span style="color: #000000">不是有效的目录！</span><span style="color: #000000">"</span><span style="color: #000000">); 
 </span><span style="color: #0000ff">return</span><span style="color: #000000"> </span><span style="color: #0000ff">false</span><span style="color: #000000">; 
 } 
 file(srcFile); 
 
 </span><span style="color: #0000ff">for</span><span style="color: #000000"> (</span><span style="color: #0000ff">int</span><span style="color: #000000"> i </span><span style="color: #000000">=</span><span style="color: #000000"> </span><span style="color: #000000">0</span><span style="color: #000000">; i </span><span style="color: #000000"><</span><span style="color: #000000"> fileList.size(); i</span><span style="color: #000000">++</span><span style="color: #000000">) { 
 String srcName </span><span style="color: #000000">=</span><span style="color: #000000"> ((File) fileList.get(i)).getPath(); 
 String desName </span><span style="color: #000000">=</span><span style="color: #000000"> srcName.substring(src.length(), srcName.length()); 
 desName </span><span style="color: #000000">=</span><span style="color: #000000"> des </span><span style="color: #000000">+</span><span style="color: #000000"> desName; 
 File dir</span><span style="color: #000000">=</span><span style="color: #0000ff">new</span><span style="color: #000000"> File(desName).getParentFile(); 
 mkdir(dir); 
 
 </span><span style="color: #0000ff">if</span><span style="color: #000000">(</span><span style="color: #000000">!</span><span style="color: #000000">copyFile(srcName, dir.getPath())){ 
 </span><span style="color: #0000ff">return</span><span style="color: #000000"> </span><span style="color: #0000ff">false</span><span style="color: #000000">; 
 } 
 } 
 </span><span style="color: #0000ff">return</span><span style="color: #000000"> </span><span style="color: #0000ff">true</span><span style="color: #000000">; 
} 
</span><span style="color: #0000ff">public</span><span style="color: #000000"> </span><span style="color: #0000ff">static</span><span style="color: #000000"> </span><span style="color: #0000ff">void</span><span style="color: #000000"> main(String[] args) { 

 FileCopy t </span><span style="color: #000000">=</span><span style="color: #000000"> </span><span style="color: #0000ff">new</span><span style="color: #000000"> FileCopy(); 
 System.out.println(t.copyFile(</span><span style="color: #000000">"</span><span style="color: #000000">D:/aaa.txt</span><span style="color: #000000">"</span><span style="color: #000000">,</span><span style="color: #000000">"</span><span style="color: #000000">E:</span><span style="color: #000000">"</span><span style="color: #000000">)); 
 String src</span><span style="color: #000000">=</span><span style="color: #000000">"</span><span style="color: #000000">D:/asdf</span><span style="color: #000000">"</span><span style="color: #000000">; 
 String des</span><span style="color: #000000">=</span><span style="color: #000000">"</span><span style="color: #000000">E:/adf</span><span style="color: #000000">"</span><span style="color: #000000">; 
 System.out.println(t.copyDir(src, des)); 
 System.out.println(t.getMessage()); 
} 

}
</span>
</div>
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