关于java:Java原生图片Base64转码与Base64解码

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import org.apache.commons.codec.binary.*;import java.io.*;import java.net.*;/** * 将file文件转换为Base64<br> * 将base64编码字符串解码成file * * @author <a href = "mailto:zhuyongsheng@njpkhuan.cn" > 朱永胜 </a > */public class File2Base64Util {    /**     * 对字节数组字符串进行Base64解码并生成图片     *     * @param fileStr      图片数据     * @param fileFilePath 保留图片全门路地址     */    public static Boolean generateBase64StringToFile(String fileStr, String fileFilePath) {        if (fileStr == null) {            return false;        }        try {            byte[] b = Base64.decodeBase64(fileStr);            for (int i = 0; i < b.length; ++i) {                if (b[i] < 0) {                    b[i] += 256;                }            }            OutputStream out = new FileOutputStream(fileFilePath);            out.write(b);            out.flush();            out.close();            return true;        } catch (Exception e) {            e.printStackTrace();            return false;        }    }    /**     * 将文件转换成Base64编码     * 将文件转化为字节数组字符串，并对其进行Base64编码解决     *     * @param localFilePath 待处理图片     */    public static String getFileBase64StrByLocalFile(String localFilePath) {        InputStream in = null;        byte[] data = null;        //读取图片字节数组        try {            in = new FileInputStream(localFilePath);            data = new byte[in.available()];            in.read(data);        } catch (IOException e) {            e.printStackTrace();        } finally {            try {                if (in != null) {                    in.close();                }            } catch (IOException e) {                e.printStackTrace();            }        }        if (data == null || data.length == 0) {            return "";        }        return new String(Base64.encodeBase64(data));    }    /**     * 将文件转换成Base64编码     * 将文件转化为字节数组字符串，并对其进行Base64编码解决     *     * @param fileUrl 待处理文件网络地址     */    public static String getFileBase64StrByUrl(String fileUrl) {        BufferedInputStream in = null;        ByteArrayOutputStream out = null;        try {            URL ur = new URL(fileUrl);            in = new BufferedInputStream(ur.openStream());            out = new ByteArrayOutputStream(1024);            byte[] temp = new byte[1024];            int size = 0;            while ((size = in.read(temp)) != -1) {                out.write(temp, 0, size);            }        } catch (Exception e) {            e.printStackTrace();        } finally {            try {                if (in != null) {                    in.close();                }            } catch (IOException e) {                e.printStackTrace();            }        }        if (out == null) {            return "";        }        byte[] content = out.toByteArray();        return new String(Base64.encodeBase64(content));    }    public static void main(String[] args) {        //待读取图片地址        String imgFile = "d:\\source.png";        //待处理的图片        String sourceImage = getFileBase64StrByLocalFile(imgFile);        String destImagePath = "d:\\target.png";        //新生成的图片        if (generateBase64StringToFile(sourceImage, destImagePath)) {            System.out.println("生成胜利！");        } else {            System.out.println("生成失败！");        }    }}