base64工具类

package com.woke.school.common.util;
import org.apache.shiro.codec.Base64;
import org.springframework.web.multipart.MultipartFile;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;

/**
 * base64工具类
 * 普通字符串转成base64
 * base64转成普通字符串
 */
public class Base64Util {
    /**
     * @param str 需要转码的字符串
     * @return 转码完成base64字符串
     */
    public static String encodeToString(String str) throws UnsupportedEncodingException {

//        byte[] bytes = str.getBytes();
        byte[] bytes = str.getBytes("utf-8");
        String base64Encoded = Base64.encodeToString(bytes);
        return base64Encoded;
    }

    ;

    /**
     * @param bytes
     * @return
     */
    public static String byteEncodeToString(byte[] bytes) {

        String base64Encoded = Base64.encodeToString(bytes);
        return base64Encoded;
    }

    ;

    /**
     * base64字符串转成string
     *
     * @param base64Encoded
     * @return
     */
    public static String dncodeToString(String base64Encoded) {

        String str = Base64.decodeToString(base64Encoded);
        return str;
    }

    /**
     * @param base64Encoded
     * @return
     */
    public static byte[] decodeToBytes(String base64Encoded) {
        byte[] encodedBytes = Base64.decode(base64Encoded);
        return encodedBytes;
    }


    public static boolean generateImage(String imgStr, String path) {
        if (imgStr == null) {
            return false;
        }

        BASE64Decoder decoder = new BASE64Decoder();
        try {
// 解密
            byte[] b = decoder.decodeBuffer(imgStr);
// 处理数据
            for (int i = 0; i < b.length; ++i) {
                if (b[i] < 0) {
                    b[i] += 256;
                }
            }
            OutputStream out = new FileOutputStream(path);
            out.write(b);
            out.flush();
            out.close();
            return true;
        } catch (Exception e) {
            return false;
        }
    }
    public static String getImageStr(String imgFile) {

        InputStream inputStream = null;
        byte[] data = null;
        try {
            inputStream = new FileInputStream(imgFile);
            data = new byte[inputStream.available()];
            inputStream.read(data);
            inputStream.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        // 加密
        BASE64Encoder encoder = new BASE64Encoder();
        return encoder.encode(data);
    }

    /**
     * @return
     * @Description: 根据图片地址转换为base64编码字符串
     * @Author:
     * @CreateTime:
     */
    public static String getImageStr1(MultipartFile pic) {
        File f = null;
        try {
            f = File.createTempFile("tmp", null);
            pic.transferTo(f);
            f.deleteOnExit();     //使用完成删除文件
        } catch (IOException e) {
            e.printStackTrace();
        }
        InputStream inputStream = null;
        byte[] data = null;
        try {
            inputStream = new FileInputStream(f);
            data = new byte[inputStream.available()];
            inputStream.read(data);
            inputStream.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        // 加密
        BASE64Encoder encoder = new BASE64Encoder();
        return encoder.encode(data);
    }

    /**
     * 示例
     */
    public static void main(String[] args) {
        String strImg = getImageStr("C:\\Users\\Administrator\\Desktop\\picture\\1.jpg");
        System.out.println(strImg);
        generateImage(strImg, "F:/86619-107.jpg");
    }
}