1.统一消息处理 前后端分离

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public class Result<T> {
    private int code;
    private String msg;
    private T data;

//失败的时候调用
    private Result(CodeMsg cm)
    {
        if(cm=null)
        {
            return;
        }
          this.code=cm.getCode();
          this.msg=cm.getMsg();
    }
//成功的时候调用
    private Result(T data){
        this.code=0;
        this.msg="SUCCESS";
        this.data=data;
    }
    //失败的时候调用
    public static <T> Result<T> Error(CodeMsg cm){
        return  new Result<T>(cm);
    }
    //成功的时候调用
    public static <T> Result<T> Success(T data){
        return new Result<T>(data);
    }


    //生成构造方法
    public Result(int code){
        this.code=code;
    }
    public Result(String msg){
        this.msg=msg;
    }

    //生成set/get方法
    public int getCode(){
        return code;
    }
    public void setCode(int code){
        this.code=code;
    }
    public int getMsg(){
        return msg;
    }
    public void setMsg(String msg){
        this.msg=msg;
    }

    public T getData(){
        return data;
    }
    public void setData(T data){
        this.data=data;
    }

}
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public class CodeMsg{
    private int code;
    private String msg;

    //通用异常

public static CodeMsg SUCCESS=new CodeMsg(0, "success");
public static CodeMsg ERROR =new CodeMsg(-1, "error");


    private CodeMsg(int code,String msg){
        this.code=code;
        this.msg=msg;
    }

    public int getCode(){
        return code;
    }

    public String  getMsg(){
        return msg;
    }

}

2 在Controller中使用@ResponseBody注解 返回JSON数据 return

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@Controller
@RequestMapping
public class DemoTestController {

    @RequestMapping("/")
    @ResponseBody
//通常用来返回JSON数据或者是XML/
    String home() {
        return "hello world";
        }

image-20190203092808595

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@RequestMapping("/resultsuccess")
@ResponseBody
public Result<String> resultsuccess() {
    //⭐️⭐️⭐️⭐️⭐️
    /**1.返回成功的时候调用
     *  public static <T> Result<T> success(T data) {
     *             return new Result<T>(data);
     *         }
     *
     *  private Result(T data) {
     *         this.code = 0;
     *         this.msg = "success";
     *         this.data = data;
     *     }
     *         1.Result.success(data);
     *         结果：
     *          {
     *              "code": 0,
     *              "msg": "success",
     *              "data": "hello immooc"
     *          }
     */

    return Result.success("hello immooc");

}

image-20190203093050758

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@RequestMapping("/resulterror")
   @ResponseBody
   public Result<String> resultError() {
       /**
        * 2。失败的时候调用
        *  public static <T> Result<T> error(CodeMsg cm) {
        *         return new Result<T>(cm);
        *     }
        *
        *  private Result(CodeMsg cm) {
        *         if (cm == null) {
        *             return;
        *         }
        *         this.code = cm.getCode();
        *         this.msg = cm.getMsg();
        *     }
        *     2 Result.error(CodeMsg.SERVER_NAME)
        *  public static CodeMsg SERVER_NAME = new CodeMsg(50001, "服务端异常");
        *
        * 结果     {
        *              "code": 50001,
        *              "msg": "服务端异常",
        *              "data": null
        *          }
        *   分析：
        *   因为CodeMsg SUCCESS 用static修饰了
        *   public static CodeMsg SUCCESS = new CodeMsg(0, "success");
        *   所以可以使用类.属性.属性的方式获得
        *      CodeMsg.SUCCESS.code=50001
        *      CodeMsg.SUCCESS.msg="服务端异常"
        */
       return Result.error(CodeMsg.SERVER_NAME);

   }

image-20190203093139520

3 前后的分离的分析

image-20190203093624571

image-20190203093752553

4 Controller 层的代码编写 snip

LoginController

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@Controller
@RequestMapping("/login")
public class LoginController {
    //self4日志处理
    private static Logger logger = LoggerFactory.getLogger(LoginController.class);
    @Autowired
    private MiaoShaoUserServiceImpl miaoShaoUserService;
    @RequestMapping("/to_login")
    public String toLogin() {
        return "login";//跳转到登陆页面login.html
    }

    @RequestMapping("/do_login")
    @ResponseBody
    //loginVo用户登陆的POJO
    public Result doLogin(@Valid LoginVo loginVo) {
        logger.info(loginVo.toString());
        
        //核心代码 ⭐️⭐️
        miaoShaoUserService.login(loginVo);
        
        return Result.success(true);
    }
}

POJO loginVo

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package com.imooc.miaosha.domain;
import com.imooc.miaosha.validate.IsMobile;
import org.hibernate.validator.constraints.Length;
import javax.validation.constraints.NotNull;
public class LoginVo {

    @NotNull
    //自定义validator
    @IsMobile
    private String mobile;
    @NotNull
    @Length(min = 32)
    private String password;

    public String getMobile() {
        return mobile;
    }
    public void setMobile(String mobile) {
        this.mobile = mobile;
    }
    public String getPassword() {
        return password;
    }
	public void setPassword(String password) {
        this.password = password;
    }
    @Override
    public String toString() {
        return "LoginVo{" +
                "mobile='" + mobile + '\'' +
                ", password='" + password + '\'' +
                '}';
    }
}

MiaoShaoUserService.

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@Service
public class MiaoShaoUserServiceImpl implements MiaoShaoUserService {
    @Autowired
    private MiaoshaUserMapper miaoshaUserMapper;
    @Override
    //得到数据库里面的User用户的所有字段 getById(long id)
    public MiaoshaUser getById(long id) {
        return miaoshaUserMapper.selectByPrimaryKey(id);
    }
    //检测是否登陆 loginVo和前端ajax data绑定了
    public boolean login(LoginVo loginVo) {
        if (loginVo == null) {
            throw new GlobalException(CodeMsg.SERVER_ERROR);
        }
        // 拿到页面中的手机号码
        String form_mobile = loginVo.getMobile();
          // 拿到页面中的密码
        String form_Password = loginVo.getPassword();
        //判断手机号是否存在getById==selectByPrimaryKey(id) 看看数据库中存不存在这个数据
        //将查询出来的数据变成miaoshaUser
        MiaoshaUser miaoshaUser = getById(Long.parseLong(form_mobile));

        if (miaoshaUser == null) {
            throw new GlobalException(CodeMsg.MOBILE_NOT_EXIST);
        }
        //如果用户存在
        //1 验证密码
        //数据库里面的密码  dbPassword   b7797cce01b4b131b433b6acf4add 449
        String dbPassword = miaoshaUser.getPassword();//Md5Utils.inputPassToDbPass()=dbPass
        //数据库里面的盐值
        String dbSalt = miaoshaUser.getSalt();
        //经过计算得到的密码 原密码 123456 calcpass= d3b1294a61a07da9b49b6e22b2cbd7 f9
        String calcPass = MD5Util.fromPassToDBPass(form_Password, dbSalt);
         //==inputPassToDbPass=calcPass
        if (!calcPass.equals(dbPassword)) {
            throw new GlobalException(CodeMsg.PASSWORED_ERROR);
        }
        return true;
    }
}

MiaoshaUserMapper–selectByPrimaryKey

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@Mapper
public interface MiaoshaUserMapper {
    		//id=手机号码 返回一个MiaoshaUser对象
            MiaoshaUser selectByPrimaryKey(Long id);
}
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<select id="selectByPrimaryKey" parameterType="java.lang.Long" resultMap="BaseResultMap">
   select 
   id, nickname, `password`, salt, head, registerr_date, login_count
   from miaosha_user
   where id = #{id,jdbcType=BIGINT}
 </select>

MD5Utils 密码加密

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package com.imooc.miaosha.utils;

import org.apache.commons.codec.digest.DigestUtils;

public class MD5Util {
    public static void main(String args[]) {
        System.out.println(inputPassToFormPass("123456"));           //d3b1294a61a07da9b49b6e22b2cbd7  f9
        System.out.println(fromPassToDBPass("123456", "1a2b3c4d"));    				      //d3b1294a61a07da9b49b6e22b2cbd7  f9
        System.out.println(inputPassToDbPass("123456","1a2b3c4d"));
        //b7797cce01b4b131b433b6acf4add  449
    }

    /*固定盐值*/
    private static final String salt = "1a2b3c4d";

    //注意导包为codec中的DigestUtils类.codec.digest.DigestUtils;
    public static String md5(String src) {
        //计算MD5摘要并以32个字符十六进制字符串的形式返回值。
        return DigestUtils.md5Hex(src);
    }

    /**
     * 第一次md5 ：
     * 用于 通过输入的密码生成
     * 传输的密码 ： 方法 通过固定盐值和明文密码之间的拼接在生成md5
     */
    public static String inputPassToFormPass(String inputPass) {
        String str = "" + salt.charAt(0) + salt.charAt(2) + inputPass + salt.charAt(5) + salt.charAt(4);
        return md5(str);
    }

    /**
     * 第二次md5 ：
     */
    public static String fromPassToDBPass(String formpasss, String salt) {
        String str = "" + salt.charAt(0) + salt.charAt(2) + formpasss + salt.charAt(5) + salt.charAt(4);
        return md5(str);
    }

    //将密码封装到数据库中
    public static String inputPassToDbPass(String input, String saltDB) {
        String s = inputPassToFormPass(input);
        String formPass = fromPassToDBPass(s, saltDB);
        return formPass;
    }
}

Ajax

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function doLogin() {
    
    ..密码处理
    var inputpass = $("#password").val();
    var salt = "1a2b3c4d";
    var str = "" + salt.charAt(0) + salt.charAt(2) + inputpass + salt.charAt(5) + salt.charAt(4);
    var password = md5(str);
    
    
    $.ajax({
        url: "/login/do_login",
        type: "POST",
        data: {
            mobile: $("#mobile").val(),
            password: password
        },
        success: function (data) {
            layer.closeAll();
            if (data.code == 0) {
                layer.msg("成功");
            } else {
                layer.msg(data.msg);
            }
            console.log(data);
        },
        error: function () {
            layer.closeAll();
        }
    });

}

MD5.min.js

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/**
 * [js-md5]{@link https://github.com/emn178/js-md5}
 *
 * @namespace md5
 * @version 0.7.2
 * @author Chen, Yi-Cyuan [emn178@gmail.com]
 * @copyright Chen, Yi-Cyuan 2014-2017
 * @license MIT
 */
!function () {
    "use strict";

    function Md5(t) {
        if (t) blocks[0] = blocks[16] = blocks[1] = blocks[2] = blocks[3] = blocks[4] = blocks[5] = blocks[6] = blocks[7] = blocks[8] = blocks[9] = blocks[10] = blocks[11] = blocks[12] = blocks[13] = blocks[14] = blocks[15] = 0, this.blocks = blocks, this.buffer8 = buffer8; else if (ARRAY_BUFFER) {
            var r = new ArrayBuffer(68);
            this.buffer8 = new Uint8Array(r), this.blocks = new Uint32Array(r)
        } else this.blocks = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0];
        this.h0 = this.h1 = this.h2 = this.h3 = this.start = this.bytes = this.hBytes = 0, this.finalized = this.hashed = !1, this.first = !0
    }

    var ERROR = "input is invalid type", WINDOW = "object" == typeof window, root = WINDOW ? window : {};
    root.JS_MD5_NO_WINDOW && (WINDOW = !1);
    var WEB_WORKER = !WINDOW && "object" == typeof self,
        NODE_JS = !root.JS_MD5_NO_NODE_JS && "object" == typeof process && process.versions && process.versions.node;
    NODE_JS ? root = global : WEB_WORKER && (root = self);
    var COMMON_JS = !root.JS_MD5_NO_COMMON_JS && "object" == typeof module && module.exports,
        AMD = "function" == typeof define && define.amd,
        ARRAY_BUFFER = !root.JS_MD5_NO_ARRAY_BUFFER && "undefined" != typeof ArrayBuffer,
        HEX_CHARS = "0123456789abcdef".split(""), EXTRA = [128, 32768, 8388608, -2147483648], SHIFT = [0, 8, 16, 24],
        OUTPUT_TYPES = ["hex", "array", "digest", "buffer", "arrayBuffer", "base64"],
        BASE64_ENCODE_CHAR = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/".split(""), blocks = [],
        buffer8;
    if (ARRAY_BUFFER) {
        var buffer = new ArrayBuffer(68);
        buffer8 = new Uint8Array(buffer), blocks = new Uint32Array(buffer)
    }
    (root.JS_MD5_NO_NODE_JS || !Array.isArray) && (Array.isArray = function (t) {
        return "[object Array]" === Object.prototype.toString.call(t)
    }), !ARRAY_BUFFER || !root.JS_MD5_NO_ARRAY_BUFFER_IS_VIEW && ArrayBuffer.isView || (ArrayBuffer.isView = function (t) {
        return "object" == typeof t && t.buffer && t.buffer.constructor === ArrayBuffer
    });
    var createOutputMethod = function (t) {
        return function (r) {
            return new Md5(!0).update(r)[t]()
        }
    }, createMethod = function () {
        var t = createOutputMethod("hex");
        NODE_JS && (t = nodeWrap(t)), t.create = function () {
            return new Md5
        }, t.update = function (r) {
            return t.create().update(r)
        };
        for (var r = 0; r < OUTPUT_TYPES.length; ++r) {
            var e = OUTPUT_TYPES[r];
            t[e] = createOutputMethod(e)
        }
        return t
    }, nodeWrap = function (method) {
        var crypto = eval("require('crypto')"), Buffer = eval("require('buffer').Buffer"), nodeMethod = function (t) {
            if ("string" == typeof t) return crypto.createHash("md5").update(t, "utf8").digest("hex");
            if (null === t || void 0 === t) throw ERROR;
            return t.constructor === ArrayBuffer && (t = new Uint8Array(t)), Array.isArray(t) || ArrayBuffer.isView(t) || t.constructor === Buffer ? crypto.createHash("md5").update(new Buffer(t)).digest("hex") : method(t)
        };
        return nodeMethod
    };
    Md5.prototype.update = function (t) {
        if (!this.finalized) {
            var r, e = typeof t;
            if ("string" !== e) {
                if ("object" !== e) throw ERROR;
                if (null === t) throw ERROR;
                if (ARRAY_BUFFER && t.constructor === ArrayBuffer) t = new Uint8Array(t); else if (!(Array.isArray(t) || ARRAY_BUFFER && ArrayBuffer.isView(t))) throw ERROR;
                r = !0
            }
            for (var s, i, o = 0, h = t.length, f = this.blocks, a = this.buffer8; h > o;) {
                if (this.hashed && (this.hashed = !1, f[0] = f[16], f[16] = f[1] = f[2] = f[3] = f[4] = f[5] = f[6] = f[7] = f[8] = f[9] = f[10] = f[11] = f[12] = f[13] = f[14] = f[15] = 0), r) if (ARRAY_BUFFER) for (i = this.start; h > o && 64 > i; ++o) a[i++] = t[o]; else for (i = this.start; h > o && 64 > i; ++o) f[i >> 2] |= t[o] << SHIFT[3 & i++]; else if (ARRAY_BUFFER) for (i = this.start; h > o && 64 > i; ++o) s = t.charCodeAt(o), 128 > s ? a[i++] = s : 2048 > s ? (a[i++] = 192 | s >> 6, a[i++] = 128 | 63 & s) : 55296 > s || s >= 57344 ? (a[i++] = 224 | s >> 12, a[i++] = 128 | s >> 6 & 63, a[i++] = 128 | 63 & s) : (s = 65536 + ((1023 & s) << 10 | 1023 & t.charCodeAt(++o)), a[i++] = 240 | s >> 18, a[i++] = 128 | s >> 12 & 63, a[i++] = 128 | s >> 6 & 63, a[i++] = 128 | 63 & s); else for (i = this.start; h > o && 64 > i; ++o) s = t.charCodeAt(o), 128 > s ? f[i >> 2] |= s << SHIFT[3 & i++] : 2048 > s ? (f[i >> 2] |= (192 | s >> 6) << SHIFT[3 & i++], f[i >> 2] |= (128 | 63 & s) << SHIFT[3 & i++]) : 55296 > s || s >= 57344 ? (f[i >> 2] |= (224 | s >> 12) << SHIFT[3 & i++], f[i >> 2] |= (128 | s >> 6 & 63) << SHIFT[3 & i++], f[i >> 2] |= (128 | 63 & s) << SHIFT[3 & i++]) : (s = 65536 + ((1023 & s) << 10 | 1023 & t.charCodeAt(++o)), f[i >> 2] |= (240 | s >> 18) << SHIFT[3 & i++], f[i >> 2] |= (128 | s >> 12 & 63) << SHIFT[3 & i++], f[i >> 2] |= (128 | s >> 6 & 63) << SHIFT[3 & i++], f[i >> 2] |= (128 | 63 & s) << SHIFT[3 & i++]);
                this.lastByteIndex = i, this.bytes += i - this.start, i >= 64 ? (this.start = i - 64, this.hash(), this.hashed = !0) : this.start = i
            }
            return this.bytes > 4294967295 && (this.hBytes += this.bytes / 4294967296 << 0, this.bytes = this.bytes % 4294967296), this
        }
    }, Md5.prototype.finalize = function () {
        if (!this.finalized) {
            this.finalized = !0;
            var t = this.blocks, r = this.lastByteIndex;
            t[r >> 2] |= EXTRA[3 & r], r >= 56 && (this.hashed || this.hash(), t[0] = t[16], t[16] = t[1] = t[2] = t[3] = t[4] = t[5] = t[6] = t[7] = t[8] = t[9] = t[10] = t[11] = t[12] = t[13] = t[14] = t[15] = 0), t[14] = this.bytes << 3, t[15] = this.hBytes << 3 | this.bytes >> 29, this.hash()
        }
    }, Md5.prototype.hash = function () {
        var t, r, e, s, i, o, h = this.blocks;
        this.first ? (t = h[0] - 680876937, t = (t << 7 | t >>> 25) - 271733879 << 0, s = (-1732584194 ^ 2004318071 & t) + h[1] - 117830708, s = (s << 12 | s >>> 20) + t << 0, e = (-271733879 ^ s & (-271733879 ^ t)) + h[2] - 1126478375, e = (e << 17 | e >>> 15) + s << 0, r = (t ^ e & (s ^ t)) + h[3] - 1316259209, r = (r << 22 | r >>> 10) + e << 0) : (t = this.h0, r = this.h1, e = this.h2, s = this.h3, t += (s ^ r & (e ^ s)) + h[0] - 680876936, t = (t << 7 | t >>> 25) + r << 0, s += (e ^ t & (r ^ e)) + h[1] - 389564586, s = (s << 12 | s >>> 20) + t << 0, e += (r ^ s & (t ^ r)) + h[2] + 606105819, e = (e << 17 | e >>> 15) + s << 0, r += (t ^ e & (s ^ t)) + h[3] - 1044525330, r = (r << 22 | r >>> 10) + e << 0), t += (s ^ r & (e ^ s)) + h[4] - 176418897, t = (t << 7 | t >>> 25) + r << 0, s += (e ^ t & (r ^ e)) + h[5] + 1200080426, s = (s << 12 | s >>> 20) + t << 0, e += (r ^ s & (t ^ r)) + h[6] - 1473231341, e = (e << 17 | e >>> 15) + s << 0, r += (t ^ e & (s ^ t)) + h[7] - 45705983, r = (r << 22 | r >>> 10) + e << 0, t += (s ^ r & (e ^ s)) + h[8] + 1770035416, t = (t << 7 | t >>> 25) + r << 0, s += (e ^ t & (r ^ e)) + h[9] - 1958414417, s = (s << 12 | s >>> 20) + t << 0, e += (r ^ s & (t ^ r)) + h[10] - 42063, e = (e << 17 | e >>> 15) + s << 0, r += (t ^ e & (s ^ t)) + h[11] - 1990404162, r = (r << 22 | r >>> 10) + e << 0, t += (s ^ r & (e ^ s)) + h[12] + 1804603682, t = (t << 7 | t >>> 25) + r << 0, s += (e ^ t & (r ^ e)) + h[13] - 40341101, s = (s << 12 | s >>> 20) + t << 0, e += (r ^ s & (t ^ r)) + h[14] - 1502002290, e = (e << 17 | e >>> 15) + s << 0, r += (t ^ e & (s ^ t)) + h[15] + 1236535329, r = (r << 22 | r >>> 10) + e << 0, t += (e ^ s & (r ^ e)) + h[1] - 165796510, t = (t << 5 | t >>> 27) + r << 0, s += (r ^ e & (t ^ r)) + h[6] - 1069501632, s = (s << 9 | s >>> 23) + t << 0, e += (t ^ r & (s ^ t)) + h[11] + 643717713, e = (e << 14 | e >>> 18) + s << 0, r += (s ^ t & (e ^ s)) + h[0] - 373897302, r = (r << 20 | r >>> 12) + e << 0, t += (e ^ s & (r ^ e)) + h[5] - 701558691, t = (t << 5 | t >>> 27) + r << 0, s += (r ^ e & (t ^ r)) + h[10] + 38016083, s = (s << 9 | s >>> 23) + t << 0, e += (t ^ r & (s ^ t)) + h[15] - 660478335, e = (e << 14 | e >>> 18) + s << 0, r += (s ^ t & (e ^ s)) + h[4] - 405537848, r = (r << 20 | r >>> 12) + e << 0, t += (e ^ s & (r ^ e)) + h[9] + 568446438, t = (t << 5 | t >>> 27) + r << 0, s += (r ^ e & (t ^ r)) + h[14] - 1019803690, s = (s << 9 | s >>> 23) + t << 0, e += (t ^ r & (s ^ t)) + h[3] - 187363961, e = (e << 14 | e >>> 18) + s << 0, r += (s ^ t & (e ^ s)) + h[8] + 1163531501, r = (r << 20 | r >>> 12) + e << 0, t += (e ^ s & (r ^ e)) + h[13] - 1444681467, t = (t << 5 | t >>> 27) + r << 0, s += (r ^ e & (t ^ r)) + h[2] - 51403784, s = (s << 9 | s >>> 23) + t << 0, e += (t ^ r & (s ^ t)) + h[7] + 1735328473, e = (e << 14 | e >>> 18) + s << 0, r += (s ^ t & (e ^ s)) + h[12] - 1926607734, r = (r << 20 | r >>> 12) + e << 0, i = r ^ e, t += (i ^ s) + h[5] - 378558, t = (t << 4 | t >>> 28) + r << 0, s += (i ^ t) + h[8] - 2022574463, s = (s << 11 | s >>> 21) + t << 0, o = s ^ t, e += (o ^ r) + h[11] + 1839030562, e = (e << 16 | e >>> 16) + s << 0, r += (o ^ e) + h[14] - 35309556, r = (r << 23 | r >>> 9) + e << 0, i = r ^ e, t += (i ^ s) + h[1] - 1530992060, t = (t << 4 | t >>> 28) + r << 0, s += (i ^ t) + h[4] + 1272893353, s = (s << 11 | s >>> 21) + t << 0, o = s ^ t, e += (o ^ r) + h[7] - 155497632, e = (e << 16 | e >>> 16) + s << 0, r += (o ^ e) + h[10] - 1094730640, r = (r << 23 | r >>> 9) + e << 0, i = r ^ e, t += (i ^ s) + h[13] + 681279174, t = (t << 4 | t >>> 28) + r << 0, s += (i ^ t) + h[0] - 358537222, s = (s << 11 | s >>> 21) + t << 0, o = s ^ t, e += (o ^ r) + h[3] - 722521979, e = (e << 16 | e >>> 16) + s << 0, r += (o ^ e) + h[6] + 76029189, r = (r << 23 | r >>> 9) + e << 0, i = r ^ e, t += (i ^ s) + h[9] - 640364487, t = (t << 4 | t >>> 28) + r << 0, s += (i ^ t) + h[12] - 421815835, s = (s << 11 | s >>> 21) + t << 0, o = s ^ t, e += (o ^ r) + h[15] + 530742520, e = (e << 16 | e >>> 16) + s << 0, r += (o ^ e) + h[2] - 995338651, r = (r << 23 | r >>> 9) + e << 0, t += (e ^ (r | ~s)) + h[0] - 198630844, t = (t << 6 | t >>> 26) + r << 0, s += (r ^ (t | ~e)) + h[7] + 1126891415, s = (s << 10 | s >>> 22) + t << 0,e += (t ^ (s | ~r)) + h[14] - 1416354905,e = (e << 15 | e >>> 17) + s << 0,r += (s ^ (e | ~t)) + h[5] - 57434055,r = (r << 21 | r >>> 11) + e << 0,t += (e ^ (r | ~s)) + h[12] + 1700485571,t = (t << 6 | t >>> 26) + r << 0,s += (r ^ (t | ~e)) + h[3] - 1894986606,s = (s << 10 | s >>> 22) + t << 0,e += (t ^ (s | ~r)) + h[10] - 1051523,e = (e << 15 | e >>> 17) + s << 0,r += (s ^ (e | ~t)) + h[1] - 2054922799,r = (r << 21 | r >>> 11) + e << 0,t += (e ^ (r | ~s)) + h[8] + 1873313359,t = (t << 6 | t >>> 26) + r << 0,s += (r ^ (t | ~e)) + h[15] - 30611744,s = (s << 10 | s >>> 22) + t << 0,e += (t ^ (s | ~r)) + h[6] - 1560198380,e = (e << 15 | e >>> 17) + s << 0,r += (s ^ (e | ~t)) + h[13] + 1309151649,r = (r << 21 | r >>> 11) + e << 0,t += (e ^ (r | ~s)) + h[4] - 145523070,t = (t << 6 | t >>> 26) + r << 0,s += (r ^ (t | ~e)) + h[11] - 1120210379,s = (s << 10 | s >>> 22) + t << 0,e += (t ^ (s | ~r)) + h[2] + 718787259,e = (e << 15 | e >>> 17) + s << 0,r += (s ^ (e | ~t)) + h[9] - 343485551,r = (r << 21 | r >>> 11) + e << 0,this.first ? (this.h0 = t + 1732584193 << 0, this.h1 = r - 271733879 << 0, this.h2 = e - 1732584194 << 0, this.h3 = s + 271733878 << 0, this.first = !1) : (this.h0 = this.h0 + t << 0, this.h1 = this.h1 + r << 0, this.h2 = this.h2 + e << 0, this.h3 = this.h3 + s << 0)
    }, Md5.prototype.hex = function () {
        this.finalize();
        var t = this.h0, r = this.h1, e = this.h2, s = this.h3;
        return HEX_CHARS[t >> 4 & 15] + HEX_CHARS[15 & t] + HEX_CHARS[t >> 12 & 15] + HEX_CHARS[t >> 8 & 15] + HEX_CHARS[t >> 20 & 15] + HEX_CHARS[t >> 16 & 15] + HEX_CHARS[t >> 28 & 15] + HEX_CHARS[t >> 24 & 15] + HEX_CHARS[r >> 4 & 15] + HEX_CHARS[15 & r] + HEX_CHARS[r >> 12 & 15] + HEX_CHARS[r >> 8 & 15] + HEX_CHARS[r >> 20 & 15] + HEX_CHARS[r >> 16 & 15] + HEX_CHARS[r >> 28 & 15] + HEX_CHARS[r >> 24 & 15] + HEX_CHARS[e >> 4 & 15] + HEX_CHARS[15 & e] + HEX_CHARS[e >> 12 & 15] + HEX_CHARS[e >> 8 & 15] + HEX_CHARS[e >> 20 & 15] + HEX_CHARS[e >> 16 & 15] + HEX_CHARS[e >> 28 & 15] + HEX_CHARS[e >> 24 & 15] + HEX_CHARS[s >> 4 & 15] + HEX_CHARS[15 & s] + HEX_CHARS[s >> 12 & 15] + HEX_CHARS[s >> 8 & 15] + HEX_CHARS[s >> 20 & 15] + HEX_CHARS[s >> 16 & 15] + HEX_CHARS[s >> 28 & 15] + HEX_CHARS[s >> 24 & 15]
    }, Md5.prototype.toString = Md5.prototype.hex, Md5.prototype.digest = function () {
        this.finalize();
        var t = this.h0, r = this.h1, e = this.h2, s = this.h3;
        return [255 & t, t >> 8 & 255, t >> 16 & 255, t >> 24 & 255, 255 & r, r >> 8 & 255, r >> 16 & 255, r >> 24 & 255, 255 & e, e >> 8 & 255, e >> 16 & 255, e >> 24 & 255, 255 & s, s >> 8 & 255, s >> 16 & 255, s >> 24 & 255]
    }, Md5.prototype.array = Md5.prototype.digest, Md5.prototype.arrayBuffer = function () {
        this.finalize();
        var t = new ArrayBuffer(16), r = new Uint32Array(t);
        return r[0] = this.h0, r[1] = this.h1, r[2] = this.h2, r[3] = this.h3, t
    }, Md5.prototype.buffer = Md5.prototype.arrayBuffer, Md5.prototype.base64 = function () {
        for (var t, r, e, s = "", i = this.array(), o = 0; 15 > o;) t = i[o++], r = i[o++], e = i[o++], s += BASE64_ENCODE_CHAR[t >>> 2] + BASE64_ENCODE_CHAR[63 & (t << 4 | r >>> 4)] + BASE64_ENCODE_CHAR[63 & (r << 2 | e >>> 6)] + BASE64_ENCODE_CHAR[63 & e];
        return t = i[o], s += BASE64_ENCODE_CHAR[t >>> 2] + BASE64_ENCODE_CHAR[t << 4 & 63] + "=="
    };
    var exports = createMethod();
    COMMON_JS ? module.exports = exports : (root.md5 = exports, AMD && define(function () {
        return exports
    }))
}();

5 MD5 Utils加密

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//将查询出来的数据变成miaoshaUser
       MiaoshaUser miaoshaUser = getById(Long.parseLong(form_mobile));

       if (miaoshaUser == null) {
           throw new GlobalException(CodeMsg.MOBILE_NOT_EXIST);
       }
       //如果用户存在
       //1 验证密码
       //数据库里面的密码  dbPassword   b7797cce01b4b131b433b6acf4add 449
       String dbPassword = miaoshaUser.getPassword();//Md5Utils.inputPassToDbPass()=dbPass
       //数据库里面的盐值
       String dbSalt = miaoshaUser.getSalt();
       //经过计算得到的密码 原密码 123456 calcpass= d3b1294a61a07da9b49b6e22b2cbd7 f9
       String calcPass = MD5Util.fromPassToDBPass(form_Password, dbSalt);
        //==inputPassToDbPass=calcPass
       if (!calcPass.equals(dbPassword)) {
           throw new GlobalException(CodeMsg.PASSWORED_ERROR);
       }
       return true;
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//验证密码
//数据库里面的密码  bPassword
String dbPassword = miaoshaUser.getPassword();
//数据库里面的盐值
String dbSalt = miaoshaUser.getSalt();
String calcPass = MD5Util.fromPassToDBPass(form_Password, dbSalt);
//d3b1294a61a07da9b49b6e22b2cbd7f9
System.err.println("============");
System.err.println(form_mobile + "form_mobile  ajax  md5加密的密码");
System.err.println(dbPassword + "dbPassword数据库里面的密码");
System.err.println(calcPass + "calcPass经过计算的密码 fromPassToDBPass(form_Password, dbSalt)");
System.err.println("inputPassToFormPass=" + "d3b1294a61a07da9b49b6e22b2cbd7f9");
System.err.println("fromPassToDBPass=" + "d3b1294a61a07da9b49b6e22b2cbd7f9");
System.err.println("inputPassToDbPass=" + "b7797cce01b4b131b433b6acf4add449");
System.err.println("============");

image-20190203101433598

image-20190203102816120

  • inputPassToFormPass(String input). Md5Utils===md5(str). Ajax
  • inputPassToDbPass(String input ,String saltDb) =====Md5Utils.fomPassDBPass(form_password),dbSalt);
  • 两次MD5封装 其本质是一样的。

6 JSR 303 校验

1dependency

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<dependency>
           <groupId>org.springframework.boot</groupId>
           <artifactId>spring-boot-starter-validation</artifactId>
           <version>2.0.6.RELEASE</version>
       </dependency>

2 .@Valid

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@RequestMapping("/do_login")
@ResponseBody
public Result doLogin(@Valid LoginVo loginVo) {
    logger.info(loginVo.toString());
    miaoShaoUserService.login(loginVo);
    return Result.success(true);
}

3 POJO

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public class LoginVo {

    @NotNull
    //自定义validator
    @IsMobile
    private String mobile;
    @NotNull
    @Length(min = 32)

4 自定义的 @IsMobile

image-20190203103632449

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package com.imooc.miaosha.validate;
import javax.validation.Constraint;
import javax.validation.Payload;
import java.lang.annotation.Documented;
import java.lang.annotation.Repeatable;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;
import static java.lang.annotation.ElementType.*;
import static java.lang.annotation.ElementType.TYPE_USE;
import static java.lang.annotation.RetentionPolicy.RUNTIME;
@Target({METHOD, FIELD, ANNOTATION_TYPE, CONSTRUCTOR, PARAMETER, TYPE_USE})
@Retention(RUNTIME)
@Documented
@Constraint(validatedBy = {IsMobileValidator.class})
public @interface IsMobile {
    boolean required() default true;
    String message() default "手机号不正确~~  -,- ~~~~";
    Class<?>[] groups() default {};
    Class<? extends Payload>[] payload() default {};

}
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package com.imooc.miaosha.validate;
import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
import java.util.regex.Pattern;
//手机号码的validator校验
public class IsMobileValidator implements ConstraintValidator<IsMobile, String> {
    private boolean required;
    // 重写initialize方法获取注解实例
    @Override
    public void initialize(IsMobile ca) {
        // 重注解实例中获信息
        required = ca.required();
    }
    @Override
    public boolean isValid(String value, ConstraintValidatorContext context) {
        // value就是要校验的数据了
        if (value != null && required) {
            // 手机号校验规则
            System.out.println(value);
            String regexp = "^(((\\+\\d{2}-)?0\\d{2,3}-\\d{7,8})|((\\+\\d{2}-)?(\\d{2,3}-)?([1][3,4,5,7,8][0-9]\\d{8})))$";
            boolean matches = Pattern.matches(regexp, value);
            System.out.println(matches);
            return matches;
        }
        return false;
    }
}

image-20190203103753898

image-20190203103810510

7统一异常处理

image-20190203104404035

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package com.imooc.miaosha.Exception;

import com.imooc.miaosha.result.CodeMsg;
import com.imooc.miaosha.result.Result;
import org.springframework.validation.BindException;
import org.springframework.validation.ObjectError;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;

import javax.servlet.http.HttpServletRequest;
import java.util.List;

//定义全局异常处理器 Advice

@ControllerAdvice
@ResponseBody//返回JSON数据
public class GlobleExceptionHandler {
    @ExceptionHandler(value = Exception.class)
    public Result<String> exceptionHandler(HttpServletRequest httpServletRequest, Exception e) {
       if (e instanceof BindException) {
            BindException ex = (BindException) e;
           
            List<ObjectError> allErrors = ex.getAllErrors();
           
            ObjectError objectError = allErrors.get(0);
           
            String defaultMessage = objectError.getDefaultMessage();
           
            return Result.error(CodeMsg.BINDD_ERROR.fillArgs(defaultMessage));
        } else {
            return Result.error(CodeMsg.SERVER_ERROR);
        }
    }
}
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public class CodeMsg {
private int code;
   private String msg;
   //通用异常
   public static CodeMsg BINDD_ERROR = new CodeMsg(50008, "参数绑定异常 :%s");
  //⭐️ 不懂 不理解 查文档
  public CodeMsg fillArgs(Object... args) {
       int code = this.code;
       String message = String.format(this.msg, args);
       return new CodeMsg(code, message);
   }

image-20190203111119493

思考🤔 参数绑定异常：手机号码不正确– –，— 哪来的

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Ajax data的理解。 五角星⭐️

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$.ajax({
    url: "/login/do_login",
    type: "POST",
    data: {
        mobile: $("#mobile").val(),
        password: password
    },
    success: function (data) {
        layer.closeAll();
        if (data.code === 0) {
            layer.msg("成功 加油Boy");
        } else {
            layer.msg(data.msg);
            layer.msg(data.data);
        }
        console.log(data);
    },
    error: function () {
        layer.closeAll();
    }
});

image-20190203115740299

这里面传入的 data.code data.msg data.data 应该就是注解@ResponseBody返回的JSON数

就是Conlse下Object的值 或者是全局异常 和统一异常返回响应的结果。 Return 语句返回的值

data.data的值不存在。 会报错。 layer.js:2 Uncaught TypeError: Cannot read property ‘parents’ of null

image-20190203132304123

image-20190203120017487

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ControllerAdvice用法解析
简介
　　通过@ControllerAdvice注解可以将对于控制器的全局配置放在同一个位置。
　　注解了@Controller的类的方法可以使用@ExceptionHandler、@InitBinder、@ModelAttribute注解到方法上。
　　@ControllerAdvice注解将作用在所有注解了@RequestMapping的控制器的方法上
　　@ExceptionHandler：用于全局处理控制器里的异常。

用法
@ControllerAdvice
@ResponseBody
public class BusinessExceptionHandler {
    @ExceptionHandler(value = Exception.class)
    public JsonBackData exceptionHandler(HttpServletRequest request, Exception e) {
        e.printStackTrace();
        JsonBackData back = new JsonBackData();
        if (e instanceof BusinessException) {
            BusinessException ex = (BusinessException) e;
            back.setSuccess(false);
            back.setBackMsg(ex.getMessage());
        }
        return back;
    }

8.全局异常处理

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public boolean login(LoginVo loginVo) {
        if (loginVo == null) {
            throw new GlobalException(CodeMsg.SERVER_ERROR);
        }
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package com.imooc.miaosha.Exception;
import com.imooc.miaosha.result.CodeMsg;
public class GlobalException extends RuntimeException {
    private CodeMsg cm;
    public GlobalException(CodeMsg cm) {
        super(cm.toString());
        this.cm = cm;
    }
    public CodeMsg getCm() {
        return cm;
    }
    public void setCm(CodeMsg cm) {
        this.cm = cm;
    }
}
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@ControllerAdvice
@ResponseBody
public class GlobleExceptionHandler {
    @ExceptionHandler(value = Exception.class)
    public Result<String> exceptionHandler(HttpServletRequest httpServletRequest, Exception e) {
        if (e instanceof GlobalException) {
            GlobalException ex = (GlobalException) e;
            return Result.error(ex.getCm());
        } 
     }
  }

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