SpringBoot+Vue+Element-ui实现简单登录注册功能

1.前端

（1）登录和注册页面

HomeView.vue

RegisterView.vue

（2） main.js，作请求和响应拦截

2.后端

（1）mapper.xml

（2）mapper接口

（3）Service接口

（4）Service实现类

（5）Controller控制器

（6）实体类

3.效果

1.前端

（1）登录和注册页面

HomeView.vue

<template>
  <div class="login-wrap">
      <el-form ref="form" :model="form">
        <h1 class="title">登录</h1>
        <el-form-item >
          <el-input type="text" v-model="form.username"  placeholder="用户账号" autocomplete="off"></el-input>
        </el-form-item>
        <el-form-item >
          <el-input type="password" v-model="form.password" placeholder="用户密码" autocomplete="off"></el-input>
        </el-form-item>
        <el-form-item>
          <el-button type="primary" @click="doLogin" style="width: 100%;">登陆</el-button>
        </el-form-item>
        <el-row style="text-align: center;margin-top: -10px;">
            <el-link type="primary" @click="doRegister">注册账号</el-link> | 
            <el-link type="primary" @click="">忘记密码</el-link>
        </el-row>
      </el-form>
  </div>
</template>
<script>
  import axios from 'axios'
  export default{
   
     data(){
       return{
         form:{
           username:'',
           password:''
         }
       }
     },

     methods:{
       doLogin(){
         axios.post('http://localhost:8081/login',this.form).then(res=>{
           if(res.status==200){
             this.$message({
               message: '登陆成功',
               type: 'success'
             });
             this.$router.push('/person');
           }else{
             this.$message({
               message: '登陆失败',
               type: 'error'
             });
           }
         })
       },
       doRegister(){
         this.$router.push('/register');
       }
     }



  }
</script>
 
<style>
  	.login-wrap {
  		box-sizing: border-box;
  		width: 100%;
  		height: 100%;
  		padding-top: 10%;
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);
  		/* background-color: #112346; */
  		background-repeat: no-repeat;
  		background-position: center right;
  		background-size: 100%;
  	}
 
  	.login-container {
  		border-radius: 10px;
  		margin: 0px auto;
  		width: 350px;
  		padding: 30px 35px 15px 35px;
  		background: #fff;
  		border: 1px solid #eaeaea;
  		text-align: left;
  		box-shadow: 0 0 20px 2px rgba(0, 0, 0, 0.1);
  	}
 
  	.title {
  		margin: 0px auto 40px auto;
  		text-align: center;
  		color: #505458;
  	}
</style>kground-image: url(data:image/svg+xml;base64,PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0iVVRGLTgiIHN0YW5kYWxvbmU9Im5vIj8+Cjxzdmcgd2lkdGg9IjEzNjFweCIgaGVpZ2h0PSI2MDlweCIgdmlld0JveD0iMCAwIDEzNjEgNjA5IiB2ZXJzaW9uPSIxLjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgeG1sbnM6eGxpbms9Imh0dHA6Ly93d3cudzMub3JnLzE5OTkveGxpbmsiPgogICAgPCEtLSBHZW5lcmF0b3I6IFNrZXRjaCA0Ni4yICg0NDQ5NikgLSBodHRwOi8vd3d3LmJvaGVtaWFuY29kaW5nLmNvbS9za2V0Y2ggLS0+CiAgICA8dGl0bGU+R3

RegisterView.vue

<template>
    <div class="login-wrap">
        <el-form ref="form" :model="form">
          <h1 class="title">注册</h1>
          <el-form-item >
            <el-input type="text" v-model="form.username" placeholder="用户账号" autocomplete="off"></el-input>
          </el-form-item>
          <el-form-item >
            <el-input type="password" v-model="form.password" placeholder="用户密码" autocomplete="off"></el-input>
          </el-form-item>
        </el-form>
        <el-button type="primary" @click="register" style="width: 100%;">注册</el-button>
        <el-button type="primary" @click="doLogin" style="width: 100%;">返回登录</el-button>
    </div>
</template>


<script>
    import axios from 'axios';
    export default({

        data() {
            return {
                form: {
                    username: '',
                    password: ''
                }
            }
        },

        methods: {
            register() {
                axios.post('http://localhost:8081/register', {
                    username: this.form.username,
                    password: this.form.password
                }).then(res => {
                    console.log(res);
                    this.$message({
                        message: '注册成功',
                        type: 'success'
                    });
                    this.$router.push('/person');
                }).catch(err => {
                    console.log(err);
                    this.$message({
                        message: '注册失败'+err.message,
                        type: 'error'
                    })
                })
            },
            doLogin() {
                this.$router.push('/');
            }
        }


    })



</script>

（2） main.js，作请求和响应拦截

import Vue from "vue";
import App from "./App.vue";
import router from "./router";
import store from "./store";
import 'element-ui/lib/theme-chalk/index.css';
import ElementUI from "element-ui";
import axios from "axios";

Vue.config.productionTip = false;
Vue.prototype.$axios = axios;

Vue.use(ElementUI);

//------------------请求拦截-------------------//
axios.interceptors.request.use(config => {
  //例：若存在token则带token
  const token = store.state.token;
  if (token) {
      config.headers.Authorization = token
  }
  return config;
}, err => {
  console.log("请求拦截=>", err);
  return err;
})

//------------------响应拦截-------------------//
//-------------对响应数据做点什么-------------//
axios.interceptors.response.use(res => {
  console.log("响应拦截=>", res.data);
  //例：后端数据处理错误，并返回错误原因；前端获取错误原因并展示
  if (res.data.success == false) {
      Message({
          message: res.data.data.message + '，请重试！',
          type: 'warning'
      });
  }
  console.log("响应拦截=>", res);
  return res ? res.data : res;
}, err => {
  console.log(err);
  //打印完整的错误信息
  console.log("响应拦截错误完整信息=>",err.response)
  //也可以在这里对不同的错误码做不同的展示处理
  throw err;
})


new Vue({
  router,
  store,
  render: (h) => h(App),
}).$mount("#app");

此处注意添加Element-ui依赖、axios依赖

2.后端

（1）mapper.xml

    <sql id="selectUser">
        select
        U.id,
        U.username,
        U.password
        from user U
    </sql>

    <select id="selectByUsername" parameterType="com.huaweisoft.test.zhansongtao.zhansongtao4.service.entity.User" resultType="com.huaweisoft.test.zhansongtao.zhansongtao4.service.entity.User">
        <include refid="selectUser"/>
        <where>
            <if test="username != null and username != ''"> and username = #{username}</if>
        </where>
    </select>

    <select id="selectByUserNameAndPassword" parameterType="com.huaweisoft.test.zhansongtao.zhansongtao4.service.entity.User" resultType="com.huaweisoft.test.zhansongtao.zhansongtao4.service.entity.User">
        <include refid="selectUser"/>
            <where>
                <if test="username != null and username != ''"> and username = #{username}</if>
                <if test="password != null and password != ''"> and password = #{password}</if>
            </where>
    </select>

    <insert id="insertUser" parameterType="com.huaweisoft.test.zhansongtao.zhansongtao4.service.entity.User">
        insert into user
        <trim prefix="(" suffix=")" suffixOverrides=",">
            <if test="username != null and username != ''">username,</if>
            <if test="password != null and password != ''">password,</if>
        </trim>
        <trim prefix="values (" suffix=")" suffixOverrides=",">
            <if test="username != null and username != ''">#{username},</if>
            <if test="password != null and password != ''">#{password},</if>
        </trim>
    </insert>


</mapper>

（2）mapper接口

@Mapper
public interface UserMapper extends tk.mybatis.mapper.common.Mapper<User>{

    User selectByUsername(User user);

    User selectByUserNameAndPassword(User user);

    int insertUser(User user);

}

（3）Service接口

public interface LoginService {
    boolean login(User user);

    void register(String username, String password);



}

（4）Service实现类

@Service
@AllArgsConstructor
public class LoginServiceImpl implements LoginService {

    private UserMapper userMapper;
    @Override
    public boolean login(User user) {
        if(StringUtils.isBlank(user.getUsername()) || StringUtils.isBlank(user.getPassword())){
            throw  new ServiceException("用户名或密码不能为空");
        }

        User user1 = userMapper.selectByUserNameAndPassword(user);

        if(user1 != null) {
            return true;
        }else {
            return false;
        }
    }

    @Override
    public void register(String username, String password) {
        if(StringUtils.isBlank(username) || StringUtils.isBlank(password)){
            throw  new ServiceException("用户名或密码不能为空");
        }

        if(!password.matches(".*\\d+.*")||!password.matches(".*[a-zA-Z]+.*")){
            throw  new ServiceException("密码必须包含大写字母、小写字母、数字");
        }
       //查询注册的用户名是否存在
        User user1 = userMapper.selectByUsername(new User(username));

        if(user1 != null){
            throw  new ServiceException("用户名已存在");
        }

        User user = new User();
        user.setUsername(username);
        user.setPassword(password);
        userMapper.insertUser(user);
    }

}

（5）Controller控制器

@RestController
@AllArgsConstructor
public class LoginController {

    private LoginService loginService;

    @PostMapping ("/login")
    public JSONResult login(@RequestBody User user) {
        boolean flag = loginService.login(user);
        if (flag) {
            return JSONResult.ok("登录成功！");
        } else {
            return JSONResult.errorMsg("登录失败！");
        }
    }

    @PostMapping("/register")
    public JSONResult register(@RequestBody User user) {
        loginService.register(user.getUsername(), user.getPassword());
        return JSONResult.ok("注册成功！");
    }

}

（6）实体类

@Data
@Table(name = "`user`")
@AllArgsConstructor
@NoArgsConstructor
public class User {

    /**
     * 主键
     */
    @Id
    @Column(name = "`id`")
    private Integer id;

    /**
     * 用户名
     */
    @Column(name = "`username`")
    private String username;

    /**
     * 密码
     */
    @Column(name = "`password`")
    private String password;


    public User(Integer id){
        this.id = id;
    }

    public User(String username){
        this.username = username;
    }
}