一、前言

基于empire-db-codegen-2.4.2.jar源码包中的org.apache.empire.db.codegen.util.FileUtils文件工具类，对清除指定文件目录cleanDirectory、删除指定文件deleteFiles、文件读取readObject、文件对象读写序列化转换writeObject/readObject等。

二、源码说明

package org.apache.empire.db.codegen.util;@b@@b@import java.io.BufferedReader;@b@import java.io.BufferedWriter;@b@import java.io.Closeable;@b@import java.io.File;@b@import java.io.FileInputStream;@b@import java.io.FileNotFoundException;@b@import java.io.FileOutputStream;@b@import java.io.FileReader;@b@import java.io.FileWriter;@b@import java.io.IOException;@b@import java.io.ObjectInputStream;@b@import java.io.ObjectOutputStream;@b@import org.slf4j.Logger;@b@import org.slf4j.LoggerFactory;@b@@b@public class FileUtils@b@{@b@  private static final Logger log = LoggerFactory.getLogger(FileUtils.class);@b@  public static final String SEPARATOR = System.getProperty("file.separator");@b@@b@  public static File getFileFromPackage(File target, String pack)@b@  {@b@    StringBuilder sb = new StringBuilder();@b@    sb.append(target.getAbsolutePath()).append(SEPARATOR);@b@    sb.append(pack.replace(".", SEPARATOR));@b@    File f = new File(sb.toString());@b@    if (!(f.exists()))@b@      f.mkdirs();@b@@b@    return f;@b@  }@b@@b@  public static void cleanDirectory(File directory)@b@  {@b@    String[] children;@b@    int i;@b@    if (directory.isDirectory())@b@    {@b@      children = directory.list();@b@      for (i = 0; i < children.length; ++i)@b@      {@b@        boolean success;@b@        File child = new File(directory, children[i]);@b@        if (child.isDirectory())@b@        {@b@          success = deleteDirectory(child);@b@        }@b@        else@b@        {@b@          success = child.delete();@b@        }@b@        if (!(success));@b@      }@b@    }@b@  }@b@@b@  public static boolean deleteDirectory(File directory)@b@  {@b@    String[] children;@b@    int i;@b@    boolean globalSuccess = true;@b@@b@    if (directory.isDirectory())@b@    {@b@      children = directory.list();@b@      for (i = 0; i < children.length; ++i)@b@      {@b@        success = deleteDirectory(new File(directory, children[i]));@b@        globalSuccess = (success) && (globalSuccess);@b@      }@b@    }@b@@b@    boolean success = directory.delete();@b@    globalSuccess = (success) && (globalSuccess);@b@    return globalSuccess;@b@  }@b@@b@  public static void deleteFiles(File directory)@b@  {@b@    String[] children;@b@    int i;@b@    if (directory.isDirectory()) {@b@      children = directory.list();@b@      for (i = 0; i < children.length; ++i)@b@        new File(directory, children[i]).delete();@b@    }@b@  }@b@@b@  public static Object readObject(String fileName)@b@  {@b@    Object o = null;@b@    ObjectInputStream ois = null;@b@    try {@b@      ois = new ObjectInputStream(new FileInputStream(fileName));@b@@b@      o = ois.readObject();@b@    } catch (FileNotFoundException e) {@b@      e.printStackTrace();@b@    } catch (IOException e) {@b@      e.printStackTrace();@b@    } catch (ClassNotFoundException e) {@b@      e.printStackTrace();@b@    } finally {@b@      close(ois);@b@    }@b@    return o;@b@  }@b@@b@  public static void writeObject(String fileName, Object o)@b@  {@b@    ObjectOutputStream oos = null;@b@    try {@b@      oos = new ObjectOutputStream(new FileOutputStream(fileName));@b@@b@      oos.writeObject(o);@b@    } catch (FileNotFoundException e) {@b@      e.printStackTrace();@b@    } catch (IOException e) {@b@      e.printStackTrace();@b@    } finally {@b@      close(oos);@b@    }@b@  }@b@@b@  public static String getFileAsString(File file)@b@  {@b@    StringBuilder sb = new StringBuilder();@b@    BufferedReader br = null;@b@    try {@b@      br = new BufferedReader(new FileReader(file));@b@@b@      while ((line = br.readLine()) != null)@b@      {@b@        String line;@b@        sb.append(line).append("\n");@b@      }@b@    }@b@    catch (IOException e)@b@    {@b@      log.error(e.getMessage(), e);@b@    }@b@    finally@b@    {@b@      close(br);@b@    }@b@    return sb.toString();@b@  }@b@@b@  public static void writeStringToFile(File file, String contents)@b@  {@b@    BufferedWriter bw = null;@b@    try {@b@      if (!(file.exists()))@b@      {@b@        file.createNewFile();@b@      }@b@@b@      bw = new BufferedWriter(new FileWriter(file));@b@      bw.write(contents);@b@    }@b@    catch (IOException e)@b@    {@b@      log.error(e.getMessage(), e);@b@    }@b@    finally@b@    {@b@      close(bw);@b@    }@b@  }@b@@b@  public static void replaceAll(File file, String input, String output)@b@  {@b@    String fileText = getFileAsString(file);@b@    StringBuilder sb = new StringBuilder(fileText);@b@    int index = -1;@b@    int length = input.length();@b@    while ((index = sb.indexOf(input)) != -1)@b@    {@b@      sb.replace(index, index + length, output);@b@    }@b@    BufferedWriter bw = null;@b@    try {@b@      bw = new BufferedWriter(new FileWriter(file));@b@@b@      bw.write(sb.toString());@b@    }@b@    catch (IOException e)@b@    {@b@      log.error(e.getMessage(), e);@b@    }@b@    finally@b@    {@b@      close(bw);@b@    }@b@  }@b@@b@  public static void close(Closeable closeable)@b@  {@b@    if (closeable != null)@b@    {@b@      try@b@      {@b@        closeable.close();@b@      }@b@      catch (IOException e)@b@      {@b@        log.warn(e.getMessage());@b@      }@b@    }@b@  }@b@}