上传富文本插入文件时报错：JSON parse error: Unexpected character解决办法

方式一（加密解密）：

1.前端

（1）安装 crypto-js

npm install crypto-js

（2）util下创建asc.js

asc.js

import CryptoJS from 'crypto-js'

// 需要和后端一致
const KEY = CryptoJS.enc.Utf8.parse('genePiCloudSecre');
const IV = CryptoJS.enc.Utf8.parse('genePiCloudSecre');

export default {

  /**
   * 加密
   * @param {*} word
   * @param {*} keyStr
   * @param {*} ivStr
   */
  encrypt (word, keyStr, ivStr) {
    let key = KEY;
    let iv = IV;
    if (keyStr) {
      key = CryptoJS.enc.Utf8.parse(keyStr);
      iv = CryptoJS.enc.Utf8.parse(ivStr);
    }
    let srcs = CryptoJS.enc.Utf8.parse(word);
    var encrypted = CryptoJS.AES.encrypt(srcs, key, {
      iv: iv,
      mode: CryptoJS.mode.CBC,
      padding: CryptoJS.pad.ZeroPadding
    });
    return CryptoJS.enc.Base64.stringify(encrypted.ciphertext);
  },

  /**
   * 解密
   * @param {*} word
   * @param {*} keyStr
   * @param {*} ivStr
   */
  decrypt (word, keyStr, ivStr) {
    let key = KEY;
    let iv = IV;

    if (keyStr) {
      key = CryptoJS.enc.Utf8.parse(keyStr);
      iv = CryptoJS.enc.Utf8.parse(ivStr);
    }

    let base64 = CryptoJS.enc.Base64.parse(word);
    let src = CryptoJS.enc.Base64.stringify(base64);

    let decrypt = CryptoJS.AES.decrypt(src, key, {
      iv: iv,
      mode: CryptoJS.mode.CBC,
      padding: CryptoJS.pad.ZeroPadding
    });

    let decryptedStr = decrypt.toString(CryptoJS.enc.Utf8);
    return decryptedStr.toString();
  }
}

（3）页面引用

import asc from '@/utils/asc';

/** 提交按钮 */
submitForm() {
  this.$refs["form"].validate(valid => {
    if (valid) {
       this.form.content = asc.encrypt(this.form.content,null,null);//加密
    }
  });
},

2.后端

（1）SecurityUtils

/**
 * 安全服务工具类
 *
 * @author ruoyi
 */
public class SecurityUtils {

    /***
     * key和iv值需要和前端一致
     */
    public static final String KEY = "genePiCloudSecre";

    public static final String IV = "genePiCloudSecre";

    /**
     * 加密方法
     *
     * @param data 要加密的数据
     * @param key  加密key
     * @param iv   加密iv
     * @return 加密的结果
     */
    public static String encrypt(String data, String key, String iv) {
        if (StringUtils.isBlank(key)){
            key=KEY;
            iv=IV;
        }
        try {
            //"算法/模式/补码方式"NoPadding PkcsPadding
            Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
            int blockSize = cipher.getBlockSize();

            byte[] dataBytes = data.getBytes();
            int plaintextLength = dataBytes.length;
            if (plaintextLength % blockSize != 0) {
                plaintextLength = plaintextLength + (blockSize - (plaintextLength % blockSize));
            }

            byte[] plaintext = new byte[plaintextLength];
            System.arraycopy(dataBytes, 0, plaintext, 0, dataBytes.length);

            SecretKeySpec keyspec = new SecretKeySpec(key.getBytes(), "AES");
            IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes());

            cipher.init(Cipher.ENCRYPT_MODE, keyspec, ivspec);
            byte[] encrypted = cipher.doFinal(plaintext);

            return new Base64().encodeToString(encrypted);

        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    /**
     * 解密方法
     *
     * @param data 要解密的数据
     * @param key  解密key
     * @param iv   解密iv
     * @return 解密的结果
     */
    public static String desEncrypt(String data, String key, String iv) {
        if (StringUtils.isBlank(key)){
            key=KEY;
            iv=IV;
        }
        try {
            byte[] encrypted1 = new Base64().decode(data);

            Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
            SecretKeySpec keySpec = new SecretKeySpec(key.getBytes(), "AES");
            IvParameterSpec ivSpec = new IvParameterSpec(iv.getBytes());
            cipher.init(Cipher.DECRYPT_MODE, keySpec, ivSpec);
            byte[] original = cipher.doFinal(encrypted1);
            return new String(original).trim();
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }
}

（2）使用

/**
* 新增学生信息测试
*/
@PostMapping
public AjaxResult add(@RequestBody TStudentTest tStudentTest) {
   tStudentTest.setContent(SecurityUtils.desEncrypt(tStudentTest.getContent(), null, null));
   return toAjax(tStudentTestService.save(tStudentTest));
}

/**
* 修改学生信息测试
*/
@PutMapping
public AjaxResult edit(@RequestBody TStudentTest tStudentTest) {
   tStudentTest.setContent(SecurityUtils.desEncrypt(tStudentTest.getContent(), null, null));
   return toAjax(tStudentTestService.updateById(tStudentTest));
}