spa项目开发之jwt验证码实现

实现思路及细节

思路：

登录界面向后台请求验证码，后台就先调用随机函数生成验证码，并且根据验证码生成一张图片，以 base64 字符串的形式传到前台，这时我们还要生成verificationJwt令牌做为请求验证码客户端的区分。我们先将验证码信息存入redis。key是 verificationJwt令牌的值，value就是验证码了。并且将令牌放入到响应头。传给客户端。当客户端提交的时候将保持的verificationJwt令牌放入请求头带过来。后端根据前端传过来的 jwt令牌去redis中获取数据，将验证码拿到后和现有的验证码进行比较。看看是否相等

细节：

访问一次登录页面，生成一个verificationJwt令牌，这个令牌的有效时间是5min，验证码在redis中的有效时间是1min，无论是verificationJwt令牌超时失效，还是验证码生成后超时失效，都会造成登录失败；

简单来说就是跳转到登陆界面，需要在5min中之内完成登录，新的验证码出来后，需要在1min中之内完成登录

逻辑图如下

相关代码

Pom依赖

		<!--引入JWT依赖,由于是基于Java，所以需要的是java-jwt -->
		<dependency>
			<groupId>io.jsonwebtoken</groupId>
			<artifactId>jjwt</artifactId>
			<version>0.9.1</version>
		</dependency>
		<dependency>
			<groupId>com.auth0</groupId>
			<artifactId>java-jwt</artifactId>
			<version>3.4.0</version>
		</dependency>

前端：

State.js

export default {
	resturantName: '飞歌餐馆',
	jwt:'',
	options: [],//存放tab页的容器
    activeIndex: '',//激活的tab页路由路径
	showName:'show',//tab页的标题
	role:"",//用来区分是否是因为左侧菜单被点击造成的路由路径发生改变，是：pass；不是：nopass
	verificationJwt:null, //这是用来保存用户等登录验证码jwt身份识别的
}

Mutations.js

setVerificationJwt: (state, payload) => {
		state.verificationJwt = payload.verificationJwt;
}

Getters.js

getVerificationJwt:(state) =>{
		return state.verificationJwt;
}

action.js

export default {
	// 'SERVER': 'http://localhost:8080/T216_SSH', //服务器
	'SERVER': 'http://localhost:8080', //服务器
	// 'SYSTEM_USER_DOLOGIN': '/vue/userAction_login.action', //用户登陆
	'SYSTEM_USER_DOLOGIN': '/vue/user/login', //用户登陆
	'VERIFICATION': '/vue/user/verificationCode', //用户登陆
	'SYSTEM_USER_DOREG': '/vue/userAction_reg.action', //用户注册
	'SYSTEM_MENU_TREE': '/vue/treeNodeAction.action', //左侧树形菜单加载
	'SYSTEM_ARTICLE_LIST': '/vue/articleAction_list.action', //文章列表
	'SYSTEM_ARTICLE_ADD': '/vue/articleAction_add.action', //文章新增
	'SYSTEM_ARTICLE_EDIT': '/vue/articleAction_edit.action', //文章修改
	'SYSTEM_ARTICLE_DEL': '/vue/articleAction_del.action', //文章删除
	'SYSTEM_USER_GETASYNCDATA': '/vue/userAction_getAsyncData.action', //vuex中的异步加载数据
	'getFullPath': k => { //获得请求的完整地址，用于mockjs测试时使用
		return this.SERVER + this[k];
	}
}

http.js

// 请求拦截器
axios.interceptors.request.use(function(config) {
	//设置验证码jwt令牌
	let verificationJwt = window.vm.$store.getters.getVerificationJwt;
	if (verificationJwt) {
		config.headers['verificationJwt'] = verificationJwt;
	}

	var jwt = window.vm.$store.getters.getJwt;
	config.headers['jwt'] = jwt;
	return config;
}, function(error) {
	return Promise.reject(error);
});

// 响应拦截器
axios.interceptors.response.use(function(response) {
	// debugger;
	//保存验证码jwt令牌
	let verificationjwt = response.headers['verificationjwt'];
	if (verificationjwt) {
		window.vm.$store.commit('setVerificationJwt', {
			verificationJwt: verificationjwt
		});
	}
	
	var jwt = response.headers['jwt'];
	if (jwt) {
		window.vm.$store.commit('setJwt', {
			jwt: jwt
		});
	}
	return response;
}, function(error) {
	return Promise.reject(error);
});

Login.vue

<template>
  <div class="login-wrap">
    <el-form class="login-container">
      <h1 class="title">用户登录</h1>
      <el-form-item label="">
        <el-input type="text" v-model="userName" placeholder="请输入登录账号" autocomplete="off"></el-input>
      </el-form-item>
      <el-form-item label="">
        <el-input type="password" v-model="userPwd" placeholder="请输入登录密码" autocomplete="off"></el-input>
      </el-form-item>
      <el-form-item label="">
        <el-row>
          <el-col :span="16">
            <el-input type="text" v-model="verificationCode" placeholder="请输入验证码" autocomplete="off"></el-input>
          </el-col>
          <el-col :span="8">
            <img id="img" :src="verificationCodeSrc" width="116px" height="40px" @click="changeVerificationCode" >
          </el-col>
        </el-row>
      </el-form-item>
      <el-form-item>
        <el-button type="primary" style="width: 100%;" @click="doSub">登  录</el-button>
      </el-form-item>
      <el-row style="text-align: center; margin-top: -15;">
        <el-link type="primary">忘记密码</el-link>
        <el-link type="primary" @click="toReg">用户注册</el-link>
      </el-row>
    </el-form>
  </div>
</template>


<script>
    export default {
        name: 'Login',
        data: function() {
            return {
                userName: null,
                userPwd: null,
                verificationCode:null,
                verificationCodeSrc:null
            }
        },
        methods: {
            toReg:function(){
                this.$router.push('/Reg');
            },
            doSub: function() {
                let params = {
                    uname: this.userName,
                    pwd: this.userPwd,
                    verificationCode: this.verificationCode
                };
                let url = this.axios.urls.SYSTEM_USER_DOLOGIN;

                this.axios.post(url, params).then(resp => {
                    if(resp.data.status==200) {
                        //提示登录成功
                        this.$message({
                            message: resp.data.msg,
                            type: 'success'
                        });
                        //跳转路由
                        this.$router.push({
                            path:'/AppMain'
                        })
                        //这是将用户信息保持下来
//                         let user=resp.data.data
//                         this.$store.dispatch('setUserAsync',{
//                             user:user
//                         });
                    }else{
                        this.$message({
                            message: resp.data.msg,
                            type: 'error'
                        });
                    }
                }).catch(resp => {
                    this.$message({
                        message: "请求异常",
                        type: 'error'
                    });
                });
            },
            //更新验证码
            changeVerificationCode(){
                let url = this.axios.urls.VERIFICATION;
                this.axios.post(url, {}).then(resp => {
                    this.verificationCodeSrc = resp.data;
                }).catch(resp => {
                    console.log(resp);
                });

            }
        }
        ,
        created() {
            let url = this.axios.urls.VERIFICATION;
            this.axios.post(url, {}).then(resp => {
                this.verificationCodeSrc = resp.data;
            }).catch(resp => {
                console.log(resp);
            });
        }
    }
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
  .login-wrap {
    box-sizing: border-box;
    width: 100%;
    height: 100%;
    padding-top: 10%;
    background-image: url(data:image/svg+xml;base64,<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<svg width="1361px" height="609px" viewBox="0 0 1361 609" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
    <!-- Generator: Sketch 46.2 (44496) - http://www.bohemiancoding.com/sketch -->
    <title>Group 21</title>
    <desc>Created with Sketch.</desc>
    <defs></defs>
    <g id="Ant-Design-Pro-3.0" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
        <g id="账户密码登录-校验" transform="translate(-79.000000, -82.000000)">
            <g id="Group-21" transform="translate(77.000000, 73.000000)">
                <g id="Group-18" opacity="0.8" transform="translate(74.901416, 569.699158) rotate(-7.000000) translate(-74.901416, -569.699158) translate(4.901416, 525.199158)">
                    <ellipse id="Oval-11" fill="#CFDAE6" opacity="0.25" cx="63.5748792" cy="32.468367" rx="21.7830479" ry="21.766008"></ellipse>
                    <ellipse id="Oval-3" fill="#CFDAE6" opacity="0.599999964" cx="5.98746479" cy="13.8668601" rx="5.2173913" ry="5.21330997"></ellipse>
                    <path d="M38.1354514,88.3520215 C43.8984227,88.3520215 48.570234,83.6838647 48.570234,77.9254015 C48.570234,72.1669383 43.8984227,67.4987816 38.1354514,67.4987816 C32.3724801,67.4987816 27.7006688,72.1669383 27.7006688,77.9254015 C27.7006688,83.6838647 32.3724801,88.3520215 38.1354514,88.3520215 Z" id="Oval-3-Copy" fill="#CFDAE6" opacity="0.45"></path>
                    <path d="M64.2775582,33.1704963 L119.185836,16.5654915" id="Path-12" stroke="#CFDAE6" stroke-width="1.73913043" stroke-linecap="round" stroke-linejoin="round"></path>
                    <path d="M42.1431708,26.5002681 L7.71190162,14.5640702" id="Path-16" stroke="#E0B4B7" stroke-width="0.702678964" opacity="0.7" stroke-linecap="round" stroke-linejoin="round" stroke-dasharray="1.405357899873153,2.108036953469981"></path>
                    <path d="M63.9262187,33.521561 L43.6721326,69.3250951" id="Path-15" stroke="#BACAD9" stroke-width="0.702678964" stroke-linecap="round" stroke-linejoin="round" stroke-dasharray="1.405357899873153,2.108036953469981"></path>
                    <g id="Group-17" transform="translate(126.850922, 13.543654) rotate(30.000000) translate(-126.850922, -13.543654) translate(117.285705, 4.381889)" fill="#CFDAE6">
                        <ellipse id="Oval-4" opacity="0.45" cx="9.13482653" cy="9.12768076" rx="9.13482653" ry="9.12768076"></ellipse>
                        <path d="M18.2696531,18.2553615 C18.2696531,13.2142826 14.1798519,9.12768076 9.13482653,9.12768076 C4.08980114,9.12768076 0,13.2142826 0,18.2553615 L18.2696531,18.2553615 Z" id="Oval-4" transform="translate(9.134827, 13.691521) scale(-1, -1) translate(-9.134827, -13.691521) "></path>
                    </g>
                </g>
                <g id="Group-14" transform="translate(216.294700, 123.725600) rotate(-5.000000) translate(-216.294700, -123.725600) translate(106.294700, 35.225600)">
                    <ellipse id="Oval-2" fill="#CFDAE6" opacity="0.25" cx="29.1176471" cy="29.1402439" rx="29.1176471" ry="29.1402439"></ellipse>
                    <ellipse id="Oval-2" fill="#CFDAE6" opacity="0.3" cx="29.1176471" cy="29.1402439" rx="21.5686275" ry="21.5853659"></ellipse>
                    <ellipse id="Oval-2-Copy" stroke="#CFDAE6" opacity="0.4" cx="179.019608" cy="138.146341" rx="23.7254902" ry="23.7439024"></ellipse>
                    <ellipse id="Oval-2" fill="#BACAD9" opacity="0.5" cx="29.1176471" cy="29.1402439" rx="10.7843137" ry="10.7926829"></ellipse>
                    <path d="M29.1176471,39.9329268 L29.1176471,18.347561 C23.1616351,18.347561 18.3333333,23.1796097 18.3333333,29.1402439 C18.3333333,35.1008781 23.1616351,39.9329268 29.1176471,39.9329268 Z" id="Oval-2" fill="#BACAD9"></path>
                    <g id="Group-9" opacity="0.45" transform="translate(172.000000, 131.000000)" fill="#E6A1A6">
                        <ellipse id="Oval-2-Copy-2" cx="7.01960784" cy="7.14634146" rx="6.47058824" ry="6.47560976"></ellipse>
                        <path d="M0.549019608,13.6219512 C4.12262681,13.6219512 7.01960784,10.722722 7.01960784,7.14634146 C7.01960784,3.56996095 4.12262681,0.670731707 0.549019608,0.670731707 L0.549019608,13.6219512 Z" id="Oval-2-Copy-2" transform="translate(3.784314, 7.146341) scale(-1, 1) translate(-3.784314, -7.146341) "></path>
                    </g>
                    <ellipse id="Oval-10" fill="#CFDAE6" cx="218.382353" cy="138.685976" rx="1.61764706" ry="1.61890244"></ellipse>
                    <ellipse id="Oval-10-Copy-2" fill="#E0B4B7" opacity="0.35" cx="179.558824" cy="175.381098" rx="1.61764706" ry="1.61890244"></ellipse>
                    <ellipse id="Oval-10-Copy" fill="#E0B4B7" opacity="0.35" cx="180.098039" cy="102.530488" rx="2.15686275" ry="2.15853659"></ellipse>
                    <path d="M28.9985381,29.9671598 L171.151018,132.876024" id="Path-11" stroke="#CFDAE6" opacity="0.8"></path>
                </g>
                <g id="Group-10" opacity="0.799999952" transform="translate(1054.100635, 36.659317) rotate(-11.000000) translate(-1054.100635, -36.659317) translate(1026.600635, 4.659317)">
                    <ellipse id="Oval-7" stroke="#CFDAE6" stroke-width="0.941176471" cx="43.8135593" cy="32" rx="11.1864407" ry="11.2941176"></ellipse>
                    <g id="Group-12" transform="translate(34.596774, 23.111111)" fill="#BACAD9">
                        <ellipse id="Oval-7" opacity="0.45" cx="9.18534718" cy="8.88888889" rx="8.47457627" ry="8.55614973"></ellipse>
                        <path d="M9.18534718,17.4450386 C13.8657264,17.4450386 17.6599235,13.6143199 17.6599235,8.88888889 C17.6599235,4.16345787 13.8657264,0.332739156 9.18534718,0.332739156 L9.18534718,17.4450386 Z" id="Oval-7"></path>
                    </g>
                    <path d="M34.6597385,24.809694 L5.71666084,4.76878945" id="Path-2" stroke="#CFDAE6" stroke-width="0.941176471"></path>
                    <ellipse id="Oval" stroke="#CFDAE6" stroke-width="0.941176471" cx="3.26271186" cy="3.29411765" rx="3.26271186" ry="3.29411765"></ellipse>
                    <ellipse id="Oval-Copy" fill="#F7E1AD" cx="2.79661017" cy="61.1764706" rx="2.79661017" ry="2.82352941"></ellipse>
                    <path d="M34.6312443,39.2922712 L5.06366663,59.785082" id="Path-10" stroke="#CFDAE6" stroke-width="0.941176471"></path>
                </g>
                <g id="Group-19" opacity="0.33" transform="translate(1282.537219, 446.502867) rotate(-10.000000) translate(-1282.537219, -446.502867) translate(1142.537219, 327.502867)">
                    <g id="Group-17" transform="translate(141.333539, 104.502742) rotate(275.000000) translate(-141.333539, -104.502742) translate(129.333539, 92.502742)" fill="#BACAD9">
                        <circle id="Oval-4" opacity="0.45" cx="11.6666667" cy="11.6666667" r="11.6666667"></circle>
                        <path d="M23.3333333,23.3333333 C23.3333333,16.8900113 18.1099887,11.6666667 11.6666667,11.6666667 C5.22334459,11.6666667 0,16.8900113 0,23.3333333 L23.3333333,23.3333333 Z" id="Oval-4" transform="translate(11.666667, 17.500000) scale(-1, -1) translate(-11.666667, -17.500000) "></path>
                    </g>
                    <circle id="Oval-5-Copy-6" fill="#CFDAE6" cx="201.833333" cy="87.5" r="5.83333333"></circle>
                    <path d="M143.5,88.8126685 L155.070501,17.6038544" id="Path-17" stroke="#BACAD9" stroke-width="1.16666667"></path>
                    <path d="M17.5,37.3333333 L127.466252,97.6449735" id="Path-18" stroke="#BACAD9" stroke-width="1.16666667"></path>
                    <polyline id="Path-19" stroke="#CFDAE6" stroke-width="1.16666667" points="143.902597 120.302281 174.935455 231.571342 38.5 147.510847 126.366941 110.833333"></polyline>
                    <path d="M159.833333,99.7453842 L195.416667,89.25" id="Path-20" stroke="#E0B4B7" stroke-width="1.16666667" opacity="0.6"></path>
                    <path d="M205.333333,82.1372105 L238.719406,36.1666667" id="Path-24" stroke="#BACAD9" stroke-width="1.16666667"></path>
                    <path d="M266.723424,132.231988 L207.083333,90.4166667" id="Path-25" stroke="#CFDAE6" stroke-width="1.16666667"></path>
                    <circle id="Oval-5" fill="#C1D1E0" cx="156.916667" cy="8.75" r="8.75"></circle>
                    <circle id="Oval-5-Copy-3" fill="#C1D1E0" cx="39.0833333" cy="148.75" r="5.25"></circle>
                    <circle id="Oval-5-Copy-2" fill-opacity="0.6" fill="#D1DEED" cx="8.75" cy="33.25" r="8.75"></circle>
                    <circle id="Oval-5-Copy-4" fill-opacity="0.6" fill="#D1DEED" cx="243.833333" cy="30.3333333" r="5.83333333"></circle>
                    <circle id="Oval-5-Copy-5" fill="#E0B4B7" cx="175.583333" cy="232.75" r="5.25"></circle>
                </g>
            </g>
        </g>
    </g>
</svg>);
    /* 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>

后端

工具类

package com.lyl.ssm.util;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * 配置tomcat允许跨域访问
 * 
 * @author Administrator
 *
 */
public class CorsFilter implements Filter {

   @Override
   public void init(FilterConfig filterConfig) throws ServletException {
   }

   @Override
   public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain)
         throws IOException, ServletException {
      HttpServletResponse resp = (HttpServletResponse) servletResponse;
      HttpServletRequest req = (HttpServletRequest) servletRequest;

      // Access-Control-Allow-Origin就是我们需要设置的域名
      // Access-Control-Allow-Headers跨域允许包含的头。
      // Access-Control-Allow-Methods是允许的请求方式
      resp.setHeader("Access-Control-Allow-Origin", "*");// *,任何域名
      resp.setHeader("Access-Control-Allow-Methods", "POST, GET, PUT, DELETE");
      // resp.setHeader("Access-Control-Allow-Headers", "Origin,X-Requested-With,
      // Content-Type, Accept");
      // 允许客户端，发一个新的请求头jwt
      //允许客户端发送一个新的请求头
      resp.setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept, jwt, verificationJwt");
      //允许客户端处理一个新的响应头jwt
      resp.setHeader("Access-Control-Expose-Headers", "jwt");
      resp.setHeader("Access-Control-Expose-Headers", "verificationJwt");
      // String sss = resp.getHeader("Access-Control-Expose-Headers");
      // System.out.println("sss=" + sss);

      // 允许请求头Token
      // httpResponse.setHeader("Access-Control-Allow-Headers","Origin,X-Requested-With,
      // Content-Type, Accept, Token");
      // System.out.println("Token=" + req.getHeader("Token"));

      if ("OPTIONS".equals(req.getMethod())) {// axios的ajax会发两次请求，第一次提交方式为：option，直接返回即可
         return;
      }
      filterChain.doFilter(servletRequest, servletResponse);
   }

   @Override
   public void destroy() {

   }
}

package com.lyl.ssm.util;

import sun.misc.BASE64Encoder;

import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.Random;

public class ImageUtil {

    /**
     * 根据指定的随机数 生成验证码图片 转 base64
     * @param word 要生存的验证码随机字符串
     * @param width 图片宽度package com.lyl.ssm.util;
     *
     * public class JSONResult {
     *
     *     // 响应业务状态
     *     private Integer status;
     *
     *     // 响应消息
     *     private String msg;
     *
     *     // 响应中的数据
     *     private Object data;
     *
     *     private String ok; // 不使用
     *
     *     public static JSONResult build(Integer status, String msg, Object data) {
     *         return new JSONResult(status, msg, data);
     *     }
     *
     *     public static JSONResult ok(Object data) {
     *         return new JSONResult(data);
     *     }
     *
     *     public static JSONResult ok() {
     *         return new JSONResult(null);
     *     }
     *
     *     public static JSONResult errorMsg(String msg) {
     *         return new JSONResult(500, msg, null);
     *     }
     *
     *     public static JSONResult errorMap(Object data) {
     *         return new JSONResult(501, "error", data);
     *     }
     *
     *     public static JSONResult errorTokenMsg(String msg) {
     *         return new JSONResult(502, msg, null);
     *     }
     *
     *     public static JSONResult errorException(String msg) {
     *         return new JSONResult(555, msg, null);
     *     }
     *
     *     public JSONResult() {
     *
     *     }
     *
     *     public JSONResult(Integer status, String msg, Object data) {
     *         this.status = status;
     *         this.msg = msg;
     *         this.data = data;
     *     }
     *
     *     public JSONResult(Object data) {
     *         this.status = 200;
     *         this.msg = "OK";
     *         this.data = data;
     *     }
     *
     *     public Boolean isOK() {
     *         return this.status == 200;
     *     }
     *
     *     public Integer getStatus() {
     *         return status;
     *     }
     *
     *     public void setStatus(Integer status) {
     *         this.status = status;
     *     }
     *
     *     public String getMsg() {
     *         return msg;
     *     }
     *
     *     public void setMsg(String msg) {
     *         this.msg = msg;
     *     }
     *
     *     public Object getData() {
     *         return data;
     *     }
     *
     *     public void setData(Object data) {
     *         this.data = data;
     *     }
     *
     *    public String getOk() {
     *       return ok;
     *    }
     *
     *    public void setOk(String ok) {
     *       this.ok = ok;
     *    }
     *
     * }
     * @param height 图片高度
     * @return base64 格式生成的验证码图片
     * @throws IOException
     */
    public static String createImageWithVerifyCode(String word, int width, int height) throws IOException {
        String png_base64="";
        //绘制内存中的图片
        BufferedImage bufferedImage = new BufferedImage(width,height,BufferedImage.TYPE_INT_RGB);
        //得到画图对象
        Graphics graphics = bufferedImage.getGraphics();
        //绘制图片前指定一个颜色
        graphics.setColor(getRandColor(160,200));
        graphics.fillRect(0,0,width,height);
        //绘制边框
        graphics.setColor(Color.white);
        graphics.drawRect(0, 0, width - 1, height - 1);
        // 步骤四 四个随机数字
        Graphics2D graphics2d = (Graphics2D) graphics;
        graphics2d.setFont(new Font("宋体", Font.BOLD, 18));
        Random random = new Random();
        // 定义x坐标
        int x = 10;
        for (int i = 0; i < word.length(); i++) {
            // 随机颜色
            graphics2d.setColor(new Color(20 + random.nextInt(110), 20 + random.nextInt(110), 20 + random.nextInt(110)));
            // 旋转 -30 --- 30度
            int jiaodu = random.nextInt(60) - 30;
            // 换算弧度
            double theta = jiaodu * Math.PI / 180;
            // 获得字母数字
            char c = word.charAt(i);
            //将c 输出到图片
            graphics2d.rotate(theta, x, 20);
            graphics2d.drawString(String.valueOf(c), x, 20);
            graphics2d.rotate(-theta, x, 20);
            x += 30;
        }
        // 绘制干扰线
        graphics.setColor(getRandColor(160, 200));
        int x1;
        int x2;
        int y1;
        int y2;
        for (int i = 0; i < 30; i++) {
            x1 = random.nextInt(width);
            x2 = random.nextInt(12);
            y1 = random.nextInt(height);
            y2 = random.nextInt(12);
            graphics.drawLine(x1, y1, x1 + x2, x2 + y2);
        }
        graphics.dispose();// 释放资源
        ByteArrayOutputStream baos = new ByteArrayOutputStream();//io流
        ImageIO.write(bufferedImage, "png", baos);//写入流中
        byte[] bytes = baos.toByteArray();//转换成字节
        BASE64Encoder encoder = new BASE64Encoder();
        png_base64 = encoder.encodeBuffer(bytes).trim();
        png_base64 = png_base64.replaceAll("\n", "").replaceAll("\r", "");//删除 \r\n
        return png_base64;
    }



    /**设置随机颜色*/
    private static Color getRandColor(int fc, int bc) {
        // 取其随机颜色
        Random random = new Random();
        if (fc > 255) {
            fc = 255;
        }
        if (bc > 255) {
            bc = 255;
        }
        int r = fc + random.nextInt(bc - fc);
        int g = fc + random.nextInt(bc - fc);
        int b = fc + random.nextInt(bc - fc);
        return new Color(r, g, b);
    }

}

package com.lyl.ssm.util;

public class JSONResult {

    // 响应业务状态
    private Integer status;

    // 响应消息
    private String msg;

    // 响应中的数据
    private Object data;
    
    private String ok; // 不使用

    public static JSONResult build(Integer status, String msg, Object data) {
        return new JSONResult(status, msg, data);
    }

    public static JSONResult ok(Object data) {
        return new JSONResult(data);
    }

    public static JSONResult ok() {
        return new JSONResult(null);
    }
    
    public static JSONResult errorMsg(String msg) {
        return new JSONResult(500, msg, null);
    }
    
    public static JSONResult errorMap(Object data) {
        return new JSONResult(501, "error", data);
    }
    
    public static JSONResult errorTokenMsg(String msg) {
        return new JSONResult(502, msg, null);
    }
    
    public static JSONResult errorException(String msg) {
        return new JSONResult(555, msg, null);
    }

    public JSONResult() {

    }

    public JSONResult(Integer status, String msg, Object data) {
        this.status = status;
        this.msg = msg;
        this.data = data;
    }

    public JSONResult(Object data) {
        this.status = 200;
        this.msg = "OK";
        this.data = data;
    }

    public Boolean isOK() {
        return this.status == 200;
    }

    public Integer getStatus() {
        return status;
    }

    public void setStatus(Integer status) {
        this.status = status;
    }

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    public Object getData() {
        return data;
    }

    public void setData(Object data) {
        this.data = data;
    }

   public String getOk() {
      return ok;
   }

   public void setOk(String ok) {
      this.ok = ok;
   }

}

package com.lyl.ssm.util;

import java.util.Date;
import java.util.Map;
import java.util.UUID;

import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;

import org.apache.commons.codec.binary.Base64;

import io.jsonwebtoken.Claims;
import io.jsonwebtoken.JwtBuilder;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;

/**
 * JWT验证过滤器：配置顺序 CorsFilte->JwtUtilsr-->StrutsPrepareAndExecuteFilter
 *
 */
public class JwtUtils {
   /**
    * JWT_WEB_TTL：WEBAPP应用中token的有效时间,默认30分钟
    */
   public static final long JWT_WEB_TTL = 5 * 60 * 1000;

   /**
    * 将jwt令牌保存到header中的key
    */
   public static final String JWT_HEADER_KEY = "jwt";
   public static final String JWT_VERIFICATION_KEY = "verificationJwt";

   // 指定签名的时候使用的签名算法，也就是header那部分，jjwt已经将这部分内容封装好了。
   private static final SignatureAlgorithm SIGNATURE_ALGORITHM = SignatureAlgorithm.HS256;
   private static final String JWT_SECRET = "f356cdce935c42328ad2001d7e9552a3";// JWT密匙
   private static final SecretKey JWT_KEY;// 使用JWT密匙生成的加密key
// private static final SecretKey JWT_VERIFICATION_KEY;// 使用JWT密匙生成的加密key


   static {
      byte[] encodedKey = Base64.decodeBase64(JWT_SECRET);
      JWT_KEY = new SecretKeySpec(encodedKey, 0, encodedKey.length, "AES");
//    这里我偷个懒，用户登录jwt密钥，与图形验证码jwt密钥搞成同一个
//    JWT_VERIFICATION_KEY = new SecretKeySpec(encodedKey, 0, encodedKey.length, "AES");
   }

   private JwtUtils() {
   }

   /**
    * 解密jwt，获得所有声明(包括标准和私有声明)
    * 
    * @param jwt
    * @return
    * @throws Exception
    */
   public static Claims parseJwt(String jwt) {
      Claims claims = Jwts.parser().setSigningKey(JWT_KEY).parseClaimsJws(jwt).getBody();
      return claims;
   }

   /**
    * 创建JWT令牌，签发时间为当前时间
    * 
    * @param claims
    *            创建payload的私有声明（根据特定的业务需要添加，如果要拿这个做验证，一般是需要和jwt的接收方提前沟通好验证方式的）
    * @param ttlMillis
    *            JWT的有效时间(单位毫秒)，当前时间+有效时间=过期时间
    * @return jwt令牌
    */
   public static String createJwt(Map<String, Object> claims, long ttlMillis) {
      // 生成JWT的时间，即签发时间
      long nowMillis = System.currentTimeMillis();

      // 下面就是在为payload添加各种标准声明和私有声明了
      // 这里其实就是new一个JwtBuilder，设置jwt的body
      JwtBuilder builder = Jwts.builder()
            // 如果有私有声明，一定要先设置这个自己创建的私有的声明，这个是给builder的claim赋值，一旦写在标准的声明赋值之后，就是覆盖了那些标准的声明的
            .setClaims(claims)
            // 设置jti(JWT ID)：是JWT的唯一标识，根据业务需要，这个可以设置为一个不重复的值，主要用来作为一次性token,从而回避重放攻击。
            // 可以在未登陆前作为身份标识使用
            .setId(UUID.randomUUID().toString().replace("-", ""))
            // iss(Issuser)签发者，写死
            // .setIssuer("zking")
            // iat: jwt的签发时间
            .setIssuedAt(new Date(nowMillis))
            // 代表这个JWT的主体，即它的所有人，这个是一个json格式的字符串，可放数据{"uid":"zs"}。此处没放
            // .setSubject("{}")
            // 设置签名使用的签名算法和签名使用的秘钥
            .signWith(SIGNATURE_ALGORITHM, JWT_KEY)
            // 设置JWT的过期时间
            .setExpiration(new Date(nowMillis + ttlMillis));

      return builder.compact();
   }

   /**
    * 复制jwt，并重新设置签发时间(为当前时间)和失效时间
    * 
    * @param jwt
    *            被复制的jwt令牌
    * @param ttlMillis
    *            jwt的有效时间(单位毫秒)，当前时间+有效时间=过期时间
    * @return
    */
   public static String copyJwt(String jwt, Long ttlMillis) {
      Claims claims = parseJwt(jwt);

      // 生成JWT的时间，即签发时间
      long nowMillis = System.currentTimeMillis();

      // 下面就是在为payload添加各种标准声明和私有声明了
      // 这里其实就是new一个JwtBuilder，设置jwt的body
      JwtBuilder builder = Jwts.builder()
            // 如果有私有声明，一定要先设置这个自己创建的私有的声明，这个是给builder的claim赋值，一旦写在标准的声明赋值之后，就是覆盖了那些标准的声明的
            .setClaims(claims)
            // 设置jti(JWT ID)：是JWT的唯一标识，根据业务需要，这个可以设置为一个不重复的值，主要用来作为一次性token,从而回避重放攻击。
            // 可以在未登陆前作为身份标识使用
            //.setId(UUID.randomUUID().toString().replace("-", ""))
            // iss(Issuser)签发者，写死
            // .setIssuer("zking")
            // iat: jwt的签发时间
            .setIssuedAt(new Date(nowMillis))
            // 代表这个JWT的主体，即它的所有人，这个是一个json格式的字符串，可放数据{"uid":"zs"}。此处没放
            // .setSubject("{}")
            // 设置签名使用的签名算法和签名使用的秘钥
            .signWith(SIGNATURE_ALGORITHM, JWT_KEY)
            // 设置JWT的过期时间
            .setExpiration(new Date(nowMillis + ttlMillis));
      return builder.compact();
   }

   public static Claims validateJwtToken(String jwt) {
      Claims claims = null;
      try {
         if (null != jwt) {
            claims = JwtUtils.parseJwt(jwt);
         }
      } catch (Exception e) {
         e.printStackTrace();
      }
      return claims;
   }
}

package com.lyl.ssm.util;


import org.apache.ibatis.cache.Cache;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.dao.DataAccessException;
import org.springframework.data.redis.connection.RedisConnection;
import org.springframework.data.redis.core.RedisCallback;
import org.springframework.data.redis.core.RedisTemplate;

import java.util.concurrent.TimeUnit;
import java.util.concurrent.locks.ReadWriteLock;
import java.util.concurrent.locks.ReentrantReadWriteLock;


public class RedisCache implements Cache //实现类
{
    private static final Logger logger = LoggerFactory.getLogger(RedisCache.class);

    private static RedisTemplate<String,Object> redisTemplate;

    private final String id;

    /**
     * The {@code ReadWriteLock}.
     */
    private final ReadWriteLock readWriteLock = new ReentrantReadWriteLock();

    @Override
    public ReadWriteLock getReadWriteLock()
    {
        return this.readWriteLock;
    }

    public static void setRedisTemplate(RedisTemplate redisTemplate) {
        RedisCache.redisTemplate = redisTemplate;
    }

    public RedisCache(final String id) {
        if (id == null) {
            throw new IllegalArgumentException("Cache instances require an ID");
        }
        logger.debug("MybatisRedisCache:id=" + id);
        this.id = id;
    }

    @Override
    public String getId() {
        return this.id;
    }

    @Override
    public void putObject(Object key, Object value) {
        try{
            logger.info(">>>>>>>>>>>>>>>>>>>>>>>>putObject: key="+key+",value="+value);
            if(null!=value)
                redisTemplate.opsForValue().set(key.toString(),value,60, TimeUnit.SECONDS);
        }catch (Exception e){
            e.printStackTrace();
            logger.error("redis保存数据异常！");
        }
    }

    @Override
    public Object getObject(Object key) {
        try{
            logger.info(">>>>>>>>>>>>>>>>>>>>>>>>getObject: key="+key);
            if(null!=key)
                return redisTemplate.opsForValue().get(key.toString());
        }catch (Exception e){
            e.printStackTrace();
            logger.error("redis获取数据异常！");
        }
        return null;
    }

    @Override
    public Object removeObject(Object key) {
        try{
            if(null!=key)
                return redisTemplate.expire(key.toString(),1,TimeUnit.DAYS);
        }catch (Exception e){
            e.printStackTrace();
            logger.error("redis获取数据异常！");
        }
        return null;
    }

    @Override
    public void clear() {
        Long size=redisTemplate.execute(new RedisCallback<Long>() {
            @Override
            public Long doInRedis(RedisConnection redisConnection) throws DataAccessException {
                Long size = redisConnection.dbSize();
                //连接清除数据
                redisConnection.flushDb();
                redisConnection.flushAll();
                return size;
            }
        });
        logger.info(">>>>>>>>>>>>>>>>>>>>>>>>clear: 清除了" + size + "个对象");
    }

    @Override
    public int getSize() {
        Long size = redisTemplate.execute(new RedisCallback<Long>() {
            @Override
            public Long doInRedis(RedisConnection connection)
                    throws DataAccessException {
                return connection.dbSize();
            }
        });
        return size.intValue();
    }
}

package com.lyl.ssm.util;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;

public class RedisCacheTransfer {
    @Autowired
    public void setRedisTemplate(RedisTemplate redisTemplate) {
        RedisCache.setRedisTemplate(redisTemplate);
    }
}

package com.lyl.ssm.util;

import java.util.Random;

public class VerifyCodeUtil {


    /**生成N位数字和字母混合的验证码
     * @param  num 验证码位数
     * @return code 生成的验证码字符串*/
    public static String produceNumAndChar(int num){
        Random random = new Random();
        String code = "";
        String ch = "ABCDEFGHIJKLMNPQRSTUVWXYZ";
        String n = "123456789";
        for(int i=0;i<num;i++){
            int flag = random.nextInt(2);
            if(flag==0){//数字
                code+=n.charAt(random.nextInt(n.length()));
            }else{//字母
                code+=ch.charAt(random.nextInt(ch.length()));
            }
        }
        return code;
    }
}

业务代码

User.java

package com.lyl.ssm.model;

public class User {
    private String uname;

    private String pwd;

    public User(String uname, String pwd) {
        this.uname = uname;
        this.pwd = pwd;
    }

    public User() {
        super();
    }

    public String getUname() {
        return uname;
    }

    public void setUname(String uname) {
        this.uname = uname;
    }

    public String getPwd() {
        return pwd;
    }

    public void setPwd(String pwd) {
        this.pwd = pwd;
    }
}

UserMapper.xml

<select id="login" resultType="com.lyl.ssm.model.User" parameterType="com.lyl.ssm.model.User">
  select
  <include refid="Base_Column_List" />
  from t_vue_user
  where uname = #{uname} and pwd = #{pwd}
</select>

UserMapper.java

package com.lyl.ssm.mapper;

import com.lyl.ssm.model.User;

public interface UserMapper {
    int deleteByPrimaryKey(String uname);

    int insert(User record);

    int insertSelective(User record);

    User selectByPrimaryKey(String uname);

    int updateByPrimaryKeySelective(User record);

    int updateByPrimaryKey(User record);

    User login(User user);
}

Service层

package com.lyl.ssm.service;

import com.lyl.ssm.model.User;

/**
 * @authorlyl
 * @site
 * @company
 * @create  2019-10-30 20:06
 */
public interface UserService {
    public User login(User user);
}

package com.lyl.ssm.service.impl;

import com.lyl.ssm.mapper.UserMapper;
import com.lyl.ssm.model.User;
import com.lyl.ssm.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/**
 * @authorlyl
 * @site
 * @company
 * @create  2019-10-30 20:07
 */

@Service
public class UserServiceImpl implements UserService {
    @Autowired
    private UserMapper userMapper;
    @Override
    public User login(User user) {
        return userMapper.login(user);
    }
}

UserController.java

package com.lyl.ssm.controller;

import com.lyl.ssm.model.User;
import com.lyl.ssm.service.UserService;
import com.lyl.ssm.util.ImageUtil;
import com.lyl.ssm.util.JSONResult;
import com.lyl.ssm.util.JwtUtils;
import com.lyl.ssm.util.VerifyCodeUtil;
import io.jsonwebtoken.Claims;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

/**
 * @authorlyl
 * @site
 * @company
 * @create  2019-10-30 20:08
 */
@Controller
@RequestMapping("/vue/user")
public class UserController {
    private static final String VERIFICATION_CODE = "verificationCode_";

    @Autowired
    private UserService userService;

    @Autowired
    private RedisTemplate redisTemplate;

    @RequestMapping("/login")
    @ResponseBody
    public JSONResult login(User u, HttpServletRequest request, HttpServletResponse response){
        //获取用户输入的验证码
        String userVerificationCode = request.getParameter("verificationCode");
        //获取验证码jwt令牌
        String userJwt = request.getHeader(JwtUtils.JWT_VERIFICATION_KEY);
        //获取到保存在redis中的验证码
        Object redisVerificationCode =  redisTemplate.opsForValue().get(VERIFICATION_CODE + userJwt) ;

//        这里存在两种情况：1、令牌超时   2、验证码超时
        if(StringUtils.isEmpty(redisVerificationCode)){
            return JSONResult.errorMsg("你的验证码已超时");
        }

        if(!redisVerificationCode.toString().equalsIgnoreCase(userVerificationCode)){
            return JSONResult.errorMsg("验证码错误");
        }

        User user = userService.login(u);
        //判断是否登录成功
        if(user != null){
            Map<String,Object> map=new HashMap<String, Object>();
            map.put("User", user);
            //这是颁发用户登录成功的jwt令牌
            String jwt= JwtUtils.createJwt(map, JwtUtils.JWT_WEB_TTL);
            response.setHeader(JwtUtils.JWT_HEADER_KEY, jwt);
            return JSONResult.ok(user);
        }else {
            return JSONResult.errorMsg("密码或账户错误");
        }

    }




    /**生成图片验证码*/
    @RequestMapping("/verificationCode")
    @ResponseBody
    public String verificationCode(HttpServletRequest req, HttpServletResponse resp) throws IOException {
        //生成验证码随机数
        String word = VerifyCodeUtil.produceNumAndChar(4);
//        获取用户的jwt令牌
        String userVerificationJwt = req.getHeader(JwtUtils.JWT_VERIFICATION_KEY);
        //验证码令牌
        Claims claims = JwtUtils.validateJwtToken(userVerificationJwt);
        if(claims == null){
            //如果用户令牌过期那么对应存放在redis中的数据也要清空
            if(!StringUtils.isEmpty(userVerificationJwt)){
                redisTemplate.expire(VERIFICATION_CODE + userVerificationJwt, 1, TimeUnit.DAYS);
            }
            userVerificationJwt =  JwtUtils.createJwt(new HashMap<String, Object>() ,JwtUtils.JWT_WEB_TTL);
            //将jwt令牌放入 response head中
            resp.setHeader(JwtUtils.JWT_VERIFICATION_KEY, userVerificationJwt);
        }
        //刷新缓存，更新验证码
        redisTemplate.opsForValue().set(VERIFICATION_CODE + userVerificationJwt , word,60, TimeUnit.SECONDS);
        //生成图片
        String code = "data:image/png;base64," + ImageUtil.createImageWithVerifyCode(word, 116,40);;
        return code;
    }
}

Web.xml

<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
         version="3.1">
  <display-name>Archetype Created Web Application</display-name>
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:applicationContext.xml</param-value>
  </context-param>
  <!-- 读取Spring上下文的监听器 -->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>

  <!-- 解决cors跨域问题过滤器 -->
  <filter>
    <filter-name>corsFilter</filter-name>
    <filter-class>com.lyl.ssm.util.CorsFilter</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>corsFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
  <!-- 解决jwt问题的过滤器 -->
  <!--<filter>-->
  <!--<filter-name>jwtFilter</filter-name>-->
  <!--<filter-class>com.lyl.ssm.util.JwtFilter</filter-class>-->
  <!--</filter>-->
  <!--<filter-mapping>-->
  <!--<filter-name>jwtFilter</filter-name>-->
  <!--<url-pattern>/*</url-pattern>-->
  <!--</filter-mapping>-->

  <!-- Spring MVC servlet -->
  <servlet>
    <servlet-name>SpringMVC</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <!--此参数可以不配置，默认值为：/WEB-INF/springmvc-servlet.xml-->
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>/WEB-INF/spring-mvc.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
    <!--web.xml 3.0的新特性，是否支持异步-->
    <async-supported>true</async-supported>
  </servlet>
  <servlet-mapping>
    <servlet-name>SpringMVC</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>
</web-app>