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 [java文件操作专题]删除目录和文件
原创空间, 软件技术
zhanglincon 发表于 2008/2/13 12:19:42 |
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import java.io.File;import java.io.FileWriter;import java.io.IOException;import java.io.PrintWriter;import java.text.SimpleDateFormat;import java.util.Date;
public class FileOperate {
/*** 创建目录* @param folderPath:目录路径* @return* @throws IOException*/public static boolean createFolder(String folderPath) throws IOException{boolean result = false;File f = new File(folderPath);
if(!f.exists()){result = f.mkdirs();}return result;}/*** 删除目录下所有文件* @param directory (File 对象)*/public void emptyDirectory(File directory) {File[] entries = directory.listFiles();for (int i = 0; i < entries.length; i++) {entries[i].delete();}}
/*** 创建文件* @param filepath:文件所在目录路径,比如:c:/test/test.txt* @return*/public static boolean makeFile(String filepath) throws IOException{boolean result = false;File file = new File(filepath);result = file.createNewFile();file = null;return result;}/*** 删除文件* @param filepath:文件所在物理路径* @return*/public static boolean isDel(String filepath){boolean result = false;File file = new File(filepath);result = file.delete();file = null;return result;}/*** 文件重命名* @param filepath:文件所在物理路径* @param destname:新文件名* @return*/public static boolean renamefile(String filepath,String destname){boolean result = false;File f = new File(filepath);String fileParent = f.getParent();String filename = f.getName();File rf = new File(fileParent+"//"+destname);if(f.renameTo(rf)){result = true;}f = null;rf = null;return result;}/*** 将文件内容写入数据库中* @param filepath:文件所在物理路径* @param content:写入内容* @throws Exception*/public static void WriteFile(String filepath,String content) throws Exception {FileWriter filewriter = new FileWriter(filepath,true);//写入多行PrintWriter printwriter = new PrintWriter(filewriter);printwriter.println(content);printwriter.flush();printwriter.close();filewriter.close();}/*** 日志备份* @param filePath:日志备份路径* @param baksize:日志备份大小参考值(字节大小)* @throws IOException*/public static void logBak(String filePath,long baksize) throws IOException{File f = new File(filePath);long len = f.length();SimpleDateFormat simpledateformat = new SimpleDateFormat("yyyyMMddHHmmss");String s = simpledateformat.format(new Date());String fileName = f.getName();int dot = fileName.indexOf(".");String bakName = s+fileName.substring(dot);System.out.println(bakName);if(len>=baksize){renamefile(filePath,bakName);makeFile(filePath);}f = null;}
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