Java实现文件和base64流的相互转换功能示例

import java.io.FileInputStream;import java.io.FileOutputStream;import sun.misc.BASE64Decoder;import sun.misc.BASE64Encoder;/** * 文件与base64的互相转换操作 */public class testFile {public static void main(String[] args) {testFile t = new testFile();try {String ret = t.encodeBase64File("d://IE和火狐js或css差异.docx");System.err.println(ret);t.decoderBase64File(ret, "d://ghsTest/retFile.docx", "d://ghsTest/");} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();}}/**   * 将文件转成base64 字符串   *   * @param path文件路径   * @return *   * @throws Exception   */  public static String encodeBase64File(String path) throws Exception {    File file = new File(path);    FileInputStream inputFile = new FileInputStream(file);    byte[] buffer = new byte[(int) file.length()];    inputFile.read(buffer);    inputFile.close();    return new BASE64Encoder().encode(buffer);  }  /**   * 将base64字符解码保存文件   *   * @param base64Code   * @param targetPath   * @throws Exception   */  public static void decoderBase64File(String base64Code, String targetPath,String catalogue)      throws Exception {  File file = new File(catalogue);  if(file.exists()==false){  file.mkdirs();  }    byte[] buffer = new BASE64Decoder().decodeBuffer(base64Code);    FileOutputStream out = new FileOutputStream(targetPath);    out.write(buffer);    out.close();  }}