Java学习-044-文件拷贝

不用说了，又是一个经常用到的方法，直接上码了。。。敬请各位小主参阅！若有不足，敬请指正，非常感谢！

文件拷贝源码：

    /**
     * <strong>文件拷贝</strong><br>
     * <br>
     * @author Aaron.ffp
     * @version V1.0.0: autotest-base cn.ffp.autotest.base.util FileUtils.java copy, 2016-03-19 12:47:38.299 Exp $
     * 
     * @param srcFile 源文件
     * @param desFile 目标文件
     * @param override 是否覆盖
     * 
     * @return boolean 成功复制返回 true；否则返回 false
     */
    public static boolean copy(String srcFile, String desFile, boolean override) {
        boolean success = false;
        
        InputStream is = null;
        OutputStream os = null;
        
        if (StringUtils.isBlank(srcFile) || StringUtils.isBlank(desFile)) {
            msg = "参数非法：源文件【" + srcFile + "】或目标文件【" + desFile + "】不可为空、null、Tab、回车等，请确认！";
            logger.error(msg);
            return success;
        }
        
        try {
            File src = new File(srcFile);
            File des = new File(desFile);
            
            // 判断源文件是否存在且为文件
            if (!src.exists() || src.isDirectory()) {
                msg = "文件拷贝失败：源文件【" + srcFile + "】不存在或者为目录，请确认！";
                logger.error(msg);
                return success;
            }
            
            // 判断目标文件是否存在且为文件
            if (des.isDirectory()) {
                msg = "文件拷贝失败：目标文件【" + desFile + "】为目录，请确认！";
                logger.error(msg);
                return success;
            } else if (des.exists() && !override) {
                    msg = "文件拷贝失败：目标文件【" + desFile + "】已存在，且您未允许覆盖目标文件，请知悉！";
                    logger.warn(msg);
                    return success;
            }
            
            des.delete();
            
            // 创建目标文件所在目录
            if (!FileUtils.createFolder(des.getParent())) {
                msg = "文件拷贝时创建目标文件【" + desFile + "】目录失败...";
                logger.error(msg);
                return success;
            }
            
            is = new FileInputStream(src);
            os = new FileOutputStream(des);
            int readByte = 0;
            
            byte[] buffer = new byte[2048];
            
            while ((readByte = is.read(buffer)) != -1 ) {
                os.write(buffer, 0, readByte);
            }
            
            success = true;
            
            msg = "成功拷贝文件：【" + srcFile + "】至【" + desFile + "】，请知悉！";
            logger.info(msg);
        } catch (FileNotFoundException fnfe) {
            msg = "文件拷贝失败：" + fnfe.getMessage();
            logger.error(msg, fnfe);
            return success;
        } catch (IOException ioe) {
            msg = "文件拷贝失败：" + ioe.getMessage();
            logger.error(msg, ioe);
            return success;
        } finally {
            try {
                if (os != null) {
                    os.close();
                }
                
                if (is != null) {
                    is.close();
                }
            } catch (IOException ioe) {
                msg = "文件拷贝成功后，释放资源失败：" + ioe.getMessage();
                logger.warn(msg, ioe);
                
                return success;
            }
        }
        
        return success;
    }
    

文件拷贝单元测试源码：

    @Test(description="public static boolean FileUtils.copy(String srcFile, String desFile, boolean override) ---> 破坏性：文件已存在，且允许覆盖
", dependsOnMethods="test_copy_desFileExists")
    public void test_copy_desFileOverride() {
        String srcFile = ConstantInfo.PROJECT_RESOURCES_HOME + "js" + ConstantInfo.OS_FILE_SEPARATOR + "color.js";
        String desFile = this.baseDir + "color-copy.js";
        
        Assert.assertTrue(FileUtils.copy(srcFile, desFile, true));
    }
    
    @Test(description="public static boolean FileUtils.copy(String srcFile, String desFile, boolean override) ---> 破坏性：文件已存在，且不允许覆盖
", dependsOnMethods="test_copy_ok")
    public void test_copy_desFileExists() {
        String srcFile = ConstantInfo.PROJECT_RESOURCES_HOME + "js" + ConstantInfo.OS_FILE_SEPARATOR + "color.js";
        String desFile = this.baseDir + "color-copy.js";
        
        Assert.assertFalse(FileUtils.copy(srcFile, desFile, false));
    }
    
    @Test(description="public static boolean FileUtils.copy(String srcFile, String desFile, boolean override) ---> 通过性
")
    public void test_copy_ok() {
        String srcFile = ConstantInfo.PROJECT_RESOURCES_HOME + "js" + ConstantInfo.OS_FILE_SEPARATOR + "color.js";
        String desFile = this.baseDir + "color-copy.js";
        
        Assert.assertTrue(FileUtils.copy(srcFile, desFile, false));
    }
    
    @Test(description="public static boolean FileUtils.copy(String srcFile, String desFile, boolean override) ---> 破坏性：文件为目录
")
    public void test_copy_srcIsDirectory() {
        String srcFile = ConstantInfo.PROJECT_RESOURCES_MAIN + "js" + ConstantInfo.OS_FILE_SEPARATOR;
        String desFile = this.baseDir + "color-copy.js";
        
        Assert.assertFalse(FileUtils.copy(srcFile, desFile, false));
    }
    
    @Test(description="public static boolean FileUtils.copy(String srcFile, String desFile, boolean override) ---> 破坏性：文件不存在
")
    public void test_copy_srcNotExist() {
        String srcFile = ConstantInfo.PROJECT_RESOURCES_MAIN + "js" + ConstantInfo.OS_FILE_SEPARATOR + "color.js";
        String desFile = this.baseDir + "color-copy.js";
        
        Assert.assertFalse(FileUtils.copy(srcFile, desFile, false));
    }

 

至此， Java学习-044-文件拷贝 顺利完结，希望此文能够给初学 Java 的您一份参考。

最后，非常感谢亲的驻足，希望此文能对亲有所帮助。热烈欢迎亲一起探讨，共同进步。非常感谢！ ^_^