JAVA后端实现数据库中用户密码的MD5加密

JAVA后端实现数据库中用户密码的MD5加密

在utils包下新建MD5Util类

import java.security.MessageDigest;

/**
 * @author 曳戈泰尔
 * @date 2021-09-07
 * @describe MD5单向加密
 */
public class MD5Util {

    /**
     * @param str
     * @return java.lang.String
     * @throws
     * @description 密码MD5加密
     * @author 曳戈泰尔
     * @date 2021-09-07
     */
    public static String stringToMD5(String str) {

        // 获取MD5实例
        MessageDigest md5 = null;
        try {
            md5 = MessageDigest.getInstance("MD5");
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }

        // 加密字符串转换为字符数组
        char[] charArray = str.toCharArray();
        byte[] byteArray = new byte[charArray.length];
        for (int i = 0; i < charArray.length; i++) {
            byteArray[i] = (byte) charArray[i];
        }

        // 加密
        byte[] md5Bytes = md5.digest(byteArray);
        StringBuffer hexValue = new StringBuffer();
        for (int i = 0; i < md5Bytes.length; i++) {
            int val = ((int) md5Bytes[i]) & 0xff;
            if (val < 16) {
                hexValue.append("0");
            }
            hexValue.append(Integer.toHexString(val));
        }

        // 返回加密后字符串
        return hexValue.toString();
    }
}

controller层调用MD5Util方法加密密码

import com.network.analysis.system.utils.MD5Util;

/*
......
*/

@ApiOperation("添加用户")
@RequestMapping(value = "/add", method = RequestMethod.POST)
public JsonResult addUser(@RequestBody UserEntity userEntity) {
    // 通过MD5加密用户密码
    String passwordMD5 = MD5Util.stringToMD5(userEntity.getPassword());
    userEntity.setPassword(passwordMD5);

    int result = UserMapper.insert(userEntity);
    if (result > 0) {
        return new JsonResult("success");
    } else {
        return new JsonResult("fail");
    }
}