base64应用

原因

做项目时，写restful接口，用json响应数据，有些比较特别的字符串jackson无法处理，使用base64编码后，变成可转json的字符串，前端显示时解码。

后端工具类编码

package com.hzmc.searchServiceBusiness.util;

import org.apache.log4j.Logger;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

import java.io.IOException;

/**
 * @ProjectName: svc-search-biz
 * @description: base64加密
 * @author: lanhaifeng
 * @create: 2018-06-08 19:25
 * @UpdateUser:
 * @UpdateDate: 2018/6/8 19:25
 * @UpdateRemark:
 **/
public class Base64EncryptUtil {

    private static final Logger logger = Logger.getLogger(Base64EncryptUtil.class);

    public static void main(String[] args) {
        String sql = "SELECT T.INST_ID ||T.SID ||T.SERIAL #||T.AUDSID AS SSID FROM GV$SESSION T UNION ALL SELECT T.INST_ID ||T.SID ||T.SERIAL #||TO_CHAR ( T.LOGON_TIME , ? ) AS SSID FROM GV$SESSION T";
        System.out.println(encode(sql.getBytes()));
    }

    /**
     * 编码
     *
     * @param bstr
     * @return String
     */
    public static String encode(byte[] bstr) {
        try {
            return new BASE64Encoder().encode(bstr);
        } catch (Exception e) {
            logger.error("编码失败："+StringUtil.getStackTrace(e));
        }
        return "";
    }

    /**
     * 解码
     *
     * @param str
     * @return string
     */
    public static String decode(String str) {
        byte[] bt = null;
        try {
            BASE64Decoder decoder = new BASE64Decoder();
            bt = decoder.decodeBuffer(str);
            return new String(bt);
        } catch (IOException e) {
            logger.error("解码失败："+StringUtil.getStackTrace(e));
            return "";
        }

    }

}

前端解码工具类

<html>
<head>
<META HTTP-EQUIV="MSThemeCompatible" CONTENT="Yes">
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>Base64加密解密 | base64.78cha.com&#039; 78cha</title>
<style>
</style>
<script type="text/javascript" language="javascript">
var base64EncodeChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
var base64DecodeChars = new Array(
    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63,
    52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1,
    -1,  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14,
    15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1,
    -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
    41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1);

function base64encode(str) {
    var out, i, len;
    var c1, c2, c3;

    len = str.length;
    i = 0;
    out = "";
    while(i < len) {
    c1 = str.charCodeAt(i++) & 0xff;
    if(i == len)
    {
        out += base64EncodeChars.charAt(c1 >> 2);
        out += base64EncodeChars.charAt((c1 & 0x3) << 4);
        out += "==";
        break;
    }
    c2 = str.charCodeAt(i++);
    if(i == len)
    {
        out += base64EncodeChars.charAt(c1 >> 2);
        out += base64EncodeChars.charAt(((c1 & 0x3)<< 4) | ((c2 & 0xF0) >> 4));
        out += base64EncodeChars.charAt((c2 & 0xF) << 2);
        out += "=";
        break;
    }
    c3 = str.charCodeAt(i++);
    out += base64EncodeChars.charAt(c1 >> 2);
    out += base64EncodeChars.charAt(((c1 & 0x3)<< 4) | ((c2 & 0xF0) >> 4));
    out += base64EncodeChars.charAt(((c2 & 0xF) << 2) | ((c3 & 0xC0) >>6));
    out += base64EncodeChars.charAt(c3 & 0x3F);
    }
    return out;
}

function base64decode(str) {
    var c1, c2, c3, c4;
    var i, len, out;

    len = str.length;
    i = 0;
    out = "";
    while(i < len) {
    /* c1 */
    do {
        c1 = base64DecodeChars[str.charCodeAt(i++) & 0xff];
    } while(i < len && c1 == -1);
    if(c1 == -1)
        break;

    /* c2 */
    do {
        c2 = base64DecodeChars[str.charCodeAt(i++) & 0xff];
    } while(i < len && c2 == -1);
    if(c2 == -1)
        break;

    out += String.fromCharCode((c1 << 2) | ((c2 & 0x30) >> 4));

    /* c3 */
    do {
        c3 = str.charCodeAt(i++) & 0xff;
        if(c3 == 61)
        return out;
        c3 = base64DecodeChars[c3];
    } while(i < len && c3 == -1);
    if(c3 == -1)
        break;

    out += String.fromCharCode(((c2 & 0XF) << 4) | ((c3 & 0x3C) >> 2));

    /* c4 */
    do {
        c4 = str.charCodeAt(i++) & 0xff;
        if(c4 == 61)
        return out;
        c4 = base64DecodeChars[c4];
    } while(i < len && c4 == -1);
    if(c4 == -1)
        break;
    out += String.fromCharCode(((c3 & 0x03) << 6) | c4);
    }
    return out;
}

function utf16to8(str) {
    var out, i, len, c;

    out = "";
    len = str.length;
    for(i = 0; i < len; i++) {
    c = str.charCodeAt(i);
    if ((c >= 0x0001) && (c <= 0x007F)) {
        out += str.charAt(i);
    } else if (c > 0x07FF) {
        out += String.fromCharCode(0xE0 | ((c >> 12) & 0x0F));
        out += String.fromCharCode(0x80 | ((c >>  6) & 0x3F));
        out += String.fromCharCode(0x80 | ((c >>  0) & 0x3F));
    } else {
        out += String.fromCharCode(0xC0 | ((c >>  6) & 0x1F));
        out += String.fromCharCode(0x80 | ((c >>  0) & 0x3F));
    }
    }
    return out;
}

function utf8to16(str) {
    var out, i, len, c;
    var char2, char3;

    out = "";
    len = str.length;
    i = 0;
    while(i < len) {
    c = str.charCodeAt(i++);
    switch(c >> 4)
    { 
      case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
        // base64.78cha.com
        out += str.charAt(i-1);
        break;
      case 12: case 13:
        // base64.78cha.com
        char2 = str.charCodeAt(i++);
        out += String.fromCharCode(((c & 0x1F) << 6) | (char2 & 0x3F));
        break;
      case 14:
        // base64.78cha.com
        char2 = str.charCodeAt(i++);
        char3 = str.charCodeAt(i++);
        out += String.fromCharCode(((c & 0x0F) << 12) |
                       ((char2 & 0x3F) << 6) |
                       ((char3 & 0x3F) << 0));
        break;
    }
    }

    return out;
}

function CharToHex(str) {
    var out, i, len, c, h;

    out = "";
    len = str.length;
    i = 0;
    while(i < len) 
    {
        c = str.charCodeAt(i++);
        h = c.toString(16);
        if(h.length < 2)
            h = "0" + h;

        out += "\\x" + h + " ";
        if(i > 0 && i % 8 == 0)
            out += "\r\n";
    }

    return out;
}

function doEncode() {
    var src = document.getElementById('src').value;
    document.getElementById('dest').value = base64encode(utf16to8(src));
}

function doDecode() {
    var src = document.getElementById('src').value;
    var opts = document.getElementById('opt');

    if(opts.checked)
    {
        document.getElementById('dest').value = CharToHex(base64decode(src));
    }
    else
    {
        document.getElementById('dest').value = utf8to16(base64decode(src));
    }
}

</script>
</head>

<BODY bgcolor="#EAF0F8" topmargin="10" leftmargin="10" rightmargin="10" bottommargin="10">
<div id="contain" style="font-family: Tahoma, Arial; font-size:11pt">
  <div id="mainbg">
    <div style="color: #000080; margin-bottom: 10"><b><a href="http://base64.78cha.com/">Base64 加密 / 解密</a></b></div>
    <div>
      <textarea id="src" rows=11 cols=60 value="" name="src"></textarea>
      <div style="margin: 10 0 10 0">
      <input onclick="doEncode();" type=button value="加密" name="encode">&nbsp;
      <input onclick="doDecode();" type=button value="解密" name="decode">&nbsp;
      <input type="checkbox" value="hex" name="opt" id="opt">解密结果以16进制显示&nbsp;
      </div>
      <textarea id="dest" rows=11 cols=60 value="" name="dest"></textarea>
    </div>
    </div>
</div>
<a href="http://chaxun.78cha.com/" target="_blank">点此返回首页</a>
</BODY>
</html>

前端效果

原因

后端工具类编码

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