fileutil.java

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package cn.js.fan.util.file;

import java.io.*;
import org.apache.log4j.Logger;
import cn.js.fan.util.StrUtil;
import java.net.URI;

public class FileUtil extends Object {
    private String path; 
    public FileUtil() {
    }

    public static String ReadFile(String filePath) throws FileNotFoundException {
        return ReadFile(filePath, "UTF-8");
    }

    
    public static String ReadFile(String filePath, String charset) throws FileNotFoundException {
        String returnStr = "";
        BufferedReader reader = null;
        try {
            InputStreamReader read = new InputStreamReader (new FileInputStream(filePath),charset);
            reader = new BufferedReader(read);
            String line = null;
            while ((line = reader.readLine()) != null) {
                
                returnStr += line + "\r\n";
            }
            read.close();
        } catch (IOException e) { 
            System.out.println(FileUtil.class.getName() + " " + e.getMessage());
        }
        finally {
            try {
                reader.close();
            }
            catch (Exception e) {
            }
        }

        return returnStr;
    }

    
    public static void WriteFile(String filePath, String str) throws
            FileNotFoundException {
        try {
            
            PrintWriter pw = new PrintWriter(new FileOutputStream(filePath));
            
            pw.println(str);
            
            pw.close();
        } catch (IOException e) {
            
            System.out.println("写入文件错误:" + e.getMessage());
            e.printStackTrace();
        }
    }

    public static void WriteFile(String filefullpath, String str, String charset) {
        try {
            FileOutputStream fo = new FileOutputStream(filefullpath);
            OutputStreamWriter osw = new OutputStreamWriter(fo, charset);
            PrintWriter out1 = new PrintWriter(osw);
            out1.println(str);
            out1.close();
            osw.close();
            fo.close();
        } catch (IOException e) {
            System.out.println("FileUtil.java writeFile:" + e.getMessage());
        }
    }

    
    public static void WriteFileUTF8(String filefullpath, String str) {
        WriteFile(filefullpath, str, "UTF-8");
    }

    
    public static boolean CopyFile(String filePathSrc, String filePathDes) {
        boolean re = false;
        File fSrc = new File(filePathSrc);
        if (!fSrc.exists())
            return false;
        try {
            if (fSrc.isFile()) {
                FileInputStream input = new FileInputStream(fSrc);
                FileOutputStream output = new FileOutputStream(filePathDes);
                byte[] b = new byte[1024 * 5];
                int len;
                while ((len = input.read(b)) != -1) {
                    output.write(b, 0, len);
                }
                output.flush();
                output.close();
                input.close();
                re = true;
            } else
                System.out.print("Error:" + filePathSrc + " is not found！");
        } catch (IOException e) {
            System.out.print(e.getMessage());
        }
        return re;
  }

  public static boolean AppendFile(String desFilePath, String srcFilePath) {
      boolean re = true;
      try {
          RandomAccessFile rf = new RandomAccessFile(desFilePath, "rw");
          
          rf.seek(rf.length()); 
          FileInputStream fis = new FileInputStream(srcFilePath);
          BufferedInputStream bis = new BufferedInputStream(fis); 
          byte[] buf = new byte[1024];
          int len = 0;
          int totalNum = 0;
          while ((len=bis.read(buf)) != -1) {
              rf.write(buf, 0, len);
              totalNum += len;
          }
          bis.close();
          fis.close(); 
          rf.close();  
      } catch (IOException e) {
          re = false;
          System.out.println(FileUtil.class.getName() + " AppendFile:" + e.getMessage());
      }
      return re;
  }

  public static String getFileExt(String fileName) {
      
      
      if (fileName==null)
          return "";
      int dotindex = fileName.lastIndexOf(".");
      String extName = fileName.substring(dotindex + 1, fileName.length());
      extName = extName.toLowerCase(); 
      return extName;
  }

  public static String getFileNameWithoutExt(String fileName) {
      int dotindex = fileName.lastIndexOf(".");
      String fName = fileName.substring(0, dotindex);
      fName = fName.toLowerCase(); 
      return fName;
  }

  public static void del(String filepath) throws IOException {
      File f = new File(filepath); 
      if (f.exists()) {
          if (f.isDirectory()) { 
              if (f.listFiles().length == 0) { 
                  f.delete();
              } else { 
                  File delFile[] = f.listFiles();
                  int i = f.listFiles().length;
                  for (int j = 0; j < i; j++) {
                      if (delFile[j].isDirectory()) {
                          del(delFile[j].getAbsolutePath()); 
                      }
                      delFile[j].delete(); 
                  }
              }
              del(filepath); 
          }
      } else {
          f.delete();
      }
  }
}