常用文件(夹)处理方法工具类

Posted 2020-07-20 大饼酥

功能：文件夹创建、文件删除、文件保存和读取、文件压缩与解压缩、excel文件打印

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.RandomAccessFile;
import java.io.Reader;
import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel;
import java.nio.channels.FileChannel.MapMode;
import java.text.DecimalFormat;
import java.util.Enumeration;
import java.util.Properties;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import java.util.zip.ZipOutputStream;

import jp.ne.so_net.ga2.no_ji.jcom.ReleaseManager;
import jp.ne.so_net.ga2.no_ji.jcom.excel8.ExcelApplication;
import jp.ne.so_net.ga2.no_ji.jcom.excel8.ExcelWorkbook;
import jp.ne.so_net.ga2.no_ji.jcom.excel8.ExcelWorkbooks;
import jp.ne.so_net.ga2.no_ji.jcom.excel8.ExcelWorksheet;

import org.apache.commons.io.FileUtils;

import com.jacob.activeX.ActiveXComponent;
import com.jacob.com.ComThread;
import com.jacob.com.Dispatch;
import com.jacob.com.Variant;

/**
 * 常用文件(夹)处理方法工具类
 */
public class FileUtil {
    
    /**
     * 创建文件夹
     * @param path 文件夹路径
     */
    public static void mkdirs(String path){
        File folder = new File(path);
        if(!folder.exists()){
            folder.mkdirs();
        }
    }
    
    /**
     * 删除文件夹下的所有文件
     * @param rootPath 文件夹路径
     * @return 删除是否成功
     */
    public static boolean deleteAll(String rootPath){    
        try {
            File f = new File(rootPath);        
            String[] files = f.list();        
            //判断文件夹是否存在文件
            if(files != null && files.length != 0){            
                for(int i = 0; i < files.length; i++) {                    
                    File file = new File(rootPath + files[i]);                                                
                        if(file.exists())                        
                            FileUtils.forceDelete(file);                                    
                }
            }
            return true;
        } catch (IOException e) {
            e.printStackTrace();
            return false;
        }    
    }
    
    /**
     * 删除单个文件
     * @param fileName 要删除的文件的文件名
     * @return 删除是否成功
     */
    public static boolean deleteFile(String fileName) {
        File file = new File(fileName);
        // 如果文件路径所对应的文件存在，并且是一个文件，则直接删除
        if (file.exists() && file.isFile()) {
            if (file.delete()) {
                return true;
            } else {
                return false;
            }
        } else {
            return false;
        }
    }
    
    /** 
     * 保存输入流中的文件  
     * @param inputStream 输入流 
     * @param outFilePath 保存的文件路径
     * @return 保存是否成功  
     */  
    public static boolean saveFileFromInputStream(InputStream inputStream,String outFilePath) {       
        try{
            FileOutputStream fileOutputStream = new FileOutputStream(outFilePath);
            byte[] buffer =new byte[1024*1024];     
            int byteread = 0;    
            while ((byteread=inputStream.read(buffer))!=-1)   
            {      
                fileOutputStream.write(buffer,0,byteread);   
                fileOutputStream.flush();   
            }    
            fileOutputStream.close();   
            inputStream.close(); 
            return true;
        }catch(Exception e){
            return false;
        }
    }   
    
    /** 
     * 以行为单位读取文件，常用于读面向行的格式化文件 
     * @param fileName 文件的路径
     * @return 
     */  
    public static String readFileByLines(String fileName) {  
        File file = new File(fileName);  
        BufferedReader reader = null;  
        StringBuffer buf = new StringBuffer();
        try {   
            reader = new BufferedReader(new FileReader(file));  
            String tempString = null;    
            // 一次读入一行，直到读入null为文件结束  
            while ((tempString = reader.readLine()) != null) {  
                // 显示行号  
                buf.append(tempString+"</br>"); 
            }  
            reader.close();  
        } catch (IOException e) {  
            e.printStackTrace();  
        } finally {  
            if (reader != null) {  
                try {  
                    reader.close();  
                } catch (IOException e1) {  
                }  
            }  
        }  
        return buf.toString();
    }  
      
    /** 
     * 以字符为单位读取文件，常用于读文本，数字等类型的文件 
     * @param fileName 文件的路径
     * @return
     */  
    public static String readFileByChars(String fileName) {  
        File file = new File(fileName);  
        Reader reader = null;  
        StringBuffer buf = new StringBuffer();
        try {    
            // 一次读一个字符  
            reader = new InputStreamReader(new FileInputStream(file));  
            int tempchar;  
            while ((tempchar = reader.read()) != -1) {  
                // 对于windows下，\r\n这两个字符在一起时，表示一个换行。  
                // 但如果这两个字符分开显示时，会换两次行。  
                // 因此，屏蔽掉\r，或者屏蔽\n。否则，将会多出很多空行。  
                if (((char) tempchar) != ‘\r‘) {  
                    buf.append((char) tempchar); 
                }  
            }  
            reader.close();  
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
        return buf.toString();
    }  
    
    /** 
     * 以字节为单位读取文件，常用于读二进制文件，如图片、声音、影像等文件。 
     * MappedByteBuffer 可以在处理大文件时，提升性能 
     * @param fileName 文件的路径
     * @return
     */  
    public static byte[] readFileByBytes(String fileName) { 
        FileChannel fc = null; 
        byte[] result = null;
        try{  
            fc = new RandomAccessFile(fileName,"r").getChannel();
            MappedByteBuffer byteBuffer = fc.map(MapMode.READ_ONLY, 0, fc.size()).load();  
            result = new byte[(int)fc.size()]; 
            if (byteBuffer.remaining() > 0) {      
                byteBuffer.get(result, 0, byteBuffer.remaining());  
            }         
        }catch (IOException e) {  
            e.printStackTrace();   
        }finally{  
            try{  
                fc.close();  
            }catch (IOException e) {  
                e.printStackTrace();  
            }  
        } 
        return result;
    }  
    
    /**
     * 读取properties配置文件
     * @param filePath 文件路径
     * @return
     */
      public static Properties loadProperty(String filePath) {
        Properties prop=new Properties();
        try {
            File file = new File(filePath);
            prop.load(new FileReader(file.getAbsolutePath()));
        }catch (IOException e) {
            e.printStackTrace();
        }
          return prop;
      }  
      
      /**
     * 转换文件大小
     * @param fileS 文件长度,单位byte
     * @return 单位B、K、M、G
     */
    public static String FormetFileSize(long fileS) {
        DecimalFormat df = new DecimalFormat("#.00");
        String fileSizeString = "";
        if (fileS < 1024) {
            fileSizeString = df.format((double) fileS) + "B";
        } else if (fileS < 1048576) {
            fileSizeString = df.format((double) fileS / 1024) + "K";
        } else if (fileS < 1073741824) {
            fileSizeString = df.format((double) fileS / 1048576) + "M";
        } else {
            fileSizeString = df.format((double) fileS / 1073741824) + "G";
        }
        return fileSizeString;
    }
    
      /**
     * 压缩多个文件成一个zip文件
     * @param srcfile 源文件列表
     * @param zipfile 压缩后的文件
     * @return 压缩是否成功
     */
    public static boolean zip(File[] srcfile, File zipfile) {
        byte[] buf = new byte[1024];
        try {
            // ZipOutputStream类：完成文件或文件夹的压缩
            ZipOutputStream out = new ZipOutputStream(new FileOutputStream(zipfile));
            for (int i = 0; i < srcfile.length; i++) {
                FileInputStream in = new FileInputStream(srcfile[i]);
                out.putNextEntry(new ZipEntry(srcfile[i].getName()));
                int len;
                while ((len = in.read(buf)) > 0) {
                    out.write(buf, 0, len);
                }
                out.closeEntry();
                in.close();
            }
            out.close();
            return true;
        } catch (Exception e) {
            return false;
        }
    }
    
    /**
     * 解压缩zip文件
     * @param zipfile 需要解压缩的文件
     * @param descDir 解压后的目标目录
     * @return 解压是否成功
     */
    public static boolean unZip(File zipfile, String descDir) {
        try {
            ZipFile zf = new ZipFile(zipfile);
            for (Enumeration entries = zf.entries(); entries.hasMoreElements();) {
                ZipEntry entry = (ZipEntry) entries.nextElement();
                String zipEntryName = entry.getName();
                InputStream in = zf.getInputStream(entry);
                OutputStream out = new FileOutputStream(descDir + zipEntryName);
                byte[] buf1 = new byte[1024];
                int len;
                while ((len = in.read(buf1)) > 0) {
                    out.write(buf1, 0, len);
                }
                in.close();
                out.close();
            }
            return true;
        } catch (Exception e) {
            return false;
        }
    }
    
    /**
     * 通过jcom后台打印excel文件，需要服务以进程方式启动
     * @param fname 文件路径
     * @return 打印是否成功
     */
    public static boolean printExcel4Jcom(String fname){
        ReleaseManager rm = new ReleaseManager();   
        try{   
            ExcelApplication excel = new ExcelApplication(rm);   
            ExcelWorkbooks xlBooks = excel.Workbooks();   
            ExcelWorkbook xlBook = xlBooks.Open(fname);   
            ExcelWorksheet xlSheet = excel.ActiveSheet();   
            xlSheet.PrintOut();   
            xlBook.Close(false, null, false);   
            excel.Quit();   
        }catch(Exception e){   
            e.printStackTrace();   
            return false;   
        }finally{   
            rm.release();   
        } 
        return true;   
    }
    
    /**
     * 通过jacob后台打印excel文件，需要服务以进程方式启动
     * @param path Excel文件路径
     * @return 打印是否成功
     */
    public static boolean printExcel4Jacob(String path){
        ComThread.InitSTA();
        ActiveXComponent xl = new ActiveXComponent("Excel.Application");
        try {
            // 不打开文档
//            Dispatch.put(xl, "Visible", new Variant(false));
            Dispatch workbooks = xl.getProperty("Workbooks").toDispatch();

            Dispatch workbook = Dispatch.call(workbooks, "Open", path).toDispatch();
            // 开始打印
//             Dispatch.get(workbook, "PrintOut");
            Dispatch.callN(workbook, "PrintOut", new Object[] { Variant.VT_MISSING, Variant.VT_MISSING, new Integer(1),
                    new Boolean(false), null, new Boolean(true), Variant.VT_MISSING, "" });
            Dispatch.call(workbook, "Close");
            System.out.println("打印执行成功");
        } catch (Exception e) {
            System.out.println("JACOB打印失败"+e);
            return false;
        } finally {
            // 始终释放资源
            xl.invoke("Quit", new Variant[] {});
            ComThread.Release();
        }
        return true;
    }
    
    /**
     * 文件属性类
     */
    public static class FileProperties{
        
        private String id;
        
        /**
         * 文件大小
         */
        private String fileSize;
        
        /**
         * 文件名称
         */
        private String fileName;
        
        
        public String getId() {
            return id;
        }
        public void setId(String id) {
            this.id = id;
        }
        
        public String getFileSize() {
            return fileSize;
        }
        public void setFileSize(String fileSize) {
            this.fileSize = fileSize;
        }
        
        public String getFileName() {
            return fileName;
        }
        public void setFileName(String fileName) {
            this.fileName = fileName;
        }
    }
}