重置密码功能

在做用户重置密码时，1）需要对输入的密码进行验证；2）需要对输入的旧密码进行判断是否跟数据表里的是一样的
1）前段代码如下

<template>
<el-dialog title="重置密码" :visible.sync="dialogVisible" :append-to-body="true" 
    width="25%" top="30vh">
  <el-form :model="ruleForm" :rules="rules" ref="ruleForm" label-width="100px">
    <el-form-item label="旧密码" prop="oldPwd">
      <el-input v-model="ruleForm.oldPwd" style="width:90%"></el-input>
    </el-form-item>
    <el-form-item label="新密码" prop="newPwd">
      <el-input type="password" v-model="ruleForm.newPwd" show-password></el-input>
    </el-form-item>
    <el-form-item label="确认密码" prop="checkPwd">
      <el-input type="password" v-model="ruleForm.checkPwd"show-password></el-input>
    </el-form-item>
    
    <el-form-item style="margin-left:30%">
      <el-button type="primary" @click="submitForm('ruleForm')">提交</el-button>
      <el-button @click="resetForm('ruleForm')">重置</el-button>
    </el-form-item>
  </el-form>
</el-dialog>
</template>

<script>
import { resetPwd } from "@/api/system/user";
export default {
    data() {
      var validateOld = (rule, value, callback) => {
        if (!value) {
          callback(new Error('旧密码不能为空'));
        }else{
          callback();
        }
      };
      var validateNew = (rule, value, callback) => {
        let reg=/^(?![0-9]+$)(?![a-zA-Z]+$)[0-9A-Za-z]{6,12}$/;
        if (value === '') {
          callback(new Error('请输入密码'));
        } else if(!reg.test(value)||value.length<6||value.length>12){
          callback(new Error('密码必须为6-12位的数字和字母的组合'));
        }else {
          if (this.ruleForm.checkPwd !== '') {
            this.$refs.ruleForm.validateField('checkPwd');
          }
          callback();
        }
      };
      var validateCheck = (rule, value, callback) => {
        if (value === '') {
          callback(new Error('请再次输入密码'));
        } else if (value !== this.ruleForm.newPwd) {
          callback(new Error('两次输入密码不一致!'));
        } else {
          callback();
        }
      };
      return {
        dialogVisible: false,
        ruleForm: {
          oldPwd: '',
          newPwd: '',
          checkPwd: ''
        },
        rules: {
          newPwd: [
            { required: true, message:"请输入新密码", trigger: 'blur' },
            { validator: validateNew, trigger: 'blur' }
          ],
          checkPwd: [
            { required: true, message:"请输入旧密码", trigger: 'blur' },
            { validator: validateCheck, trigger: 'blur' }
          ],
          oldPwd: [
            { required: true, message:"请输入旧密码", trigger: 'blur' },
            { validator: validateOld, trigger: 'blur' }
          ]
        }
      };
    },
    methods: {
      submitForm(formName) {
        this.$refs[formName].validate((valid) => {
          if (valid) {
            var userName = this.$store.getters.name;
            this.ruleForm.userName = userName;
            resetPwd(this.ruleForm).then((res) => {
              this.$Msg.successMsg("密码重置成功");
              this.dialogVisible = false;
              this.$store.dispatch("LogOut").then(() => {
                location.href = "/index";
              });
            });
          } else {
            console.log('error submit!!');
            return false;
          }
        });
      },
      resetForm(formName) {
        this.$refs[formName].resetFields();
      },
    }
  }
</script>

2）后台代码
后台操作 首先验证输入的旧密码是否正确
使用 BCryptPasswordEncoder的match方法；
参数1是原始的没有经过加密的,参数2是从用户表中提取的之前加密的密码

public AjaxResult resetPwd(String userName, String oldPwd, String newPwd) {
   BCryptPasswordEncoder bCryptPasswordEncoder = new BCryptPasswordEncoder();
   String tbPwd = userMapper.selectUserByUserName(userName).getPassword();
   if(bCryptPasswordEncoder.matches(oldPwd,tbPwd)){
       newPwd = SecurityUtils.encryptPassword(newPwd);
       userMapper.resetPwd(userName, newPwd);
       return AjaxResult.success();
    }else{
    return AjaxResult.error("输入的旧密码不正确");
    }
}