open-dbtool/src/main/resources/modules/SpringBoot/java/frame/utils/FileUtil.java

package ${basePackage}.frame.utils;

import java.io.*;

public class FileUtil {

    public static String readFileToString(File file) throws IOException {
        byte[] bytes = readFileToByteArray(file);
        return new String(bytes, "UTF-8");
    }

    public static byte[] readFileToByteArray(File file) throws IOException {
        InputStream in = openInputStream(file);
        Throwable var2 = null;

        byte[] var5;
        try {
            long fileLength = file.length();
            var5 = fileLength > 0L ? toByteArray(in, fileLength) : toByteArray(in);
        } catch (Throwable var14) {
            var2 = var14;
            throw var14;
        } finally {
            if (in != null) {
                if (var2 != null) {
                    try {
                        in.close();
                    } catch (Throwable var13) {
                        var2.addSuppressed(var13);
                    }
                } else {
                    in.close();
                }
            }

        }

        return var5;
    }

    public static FileInputStream openInputStream(File file) throws IOException {
        if (file.exists()) {
            if (file.isDirectory()) {
                throw new IOException("File '" + file + "' exists but is a directory");
            } else if (!file.canRead()) {
                throw new IOException("File '" + file + "' cannot be read");
            } else {
                return new FileInputStream(file);
            }
        } else {
            throw new FileNotFoundException("File '" + file + "' does not exist");
        }
    }

    public static byte[] toByteArray(InputStream input, long size) throws IOException {
        if (size > 2147483647L) {
            throw new IllegalArgumentException("Size cannot be greater than Integer max value: " + size);
        } else {
            return toByteArray(input, (int) size);
        }
    }

    public static byte[] toByteArray(InputStream input, int size) throws IOException {
        if(size < 0) {
            throw new IllegalArgumentException("Size must be equal or greater than zero: " + size);
        } else if(size == 0) {
            return new byte[0];
        } else {
            byte[] data = new byte[size];

            int offset;
            int read;
            for(offset = 0; offset < size && (read = input.read(data, offset, size - offset)) != -1; offset += read) {
                ;
            }

            if(offset != size) {
                throw new IOException("Unexpected read size. current: " + offset + ", expected: " + size);
            } else {
                return data;
            }
        }
    }

    public static byte[] toByteArray(InputStream input) throws IOException {
        ByteArrayOutputStream output = new ByteArrayOutputStream();
        Throwable var2 = null;

        byte[] var3;
        try {
            copy((InputStream) input, (OutputStream) output);
            var3 = output.toByteArray();
        } catch (Throwable var12) {
            var2 = var12;
            throw var12;
        } finally {
            if (output != null) {
                if (var2 != null) {
                    try {
                        output.close();
                    } catch (Throwable var11) {
                        var2.addSuppressed(var11);
                    }
                } else {
                    output.close();
                }
            }

        }

        return var3;
    }

    public static int copy(InputStream input, OutputStream output) throws IOException {
        long count = copyLarge(input, output);
        return count > 2147483647L ? -1 : (int) count;
    }


    public static long copyLarge(InputStream input, OutputStream output) throws IOException {
        return copy(input, output, 4096);
    }

    public static long copy(InputStream input, OutputStream output, int bufferSize) throws IOException {
        return copyLarge(input, output, new byte[bufferSize]);
    }

    public static long copyLarge(InputStream input, OutputStream output, byte[] buffer) throws IOException {
        long count;
        int n;
        for (count = 0L; -1 != (n = input.read(buffer)); count += (long) n) {
            output.write(buffer, 0, n);
        }

        return count;
    }
}