详解intellij idea搭建SSM框架(spring+maven+myb…

package com.springmvc.service;

import com.springmvc.entity.Userinfo;

import java.util.ArrayList;

/**
 * Created by toutou on 2018/5/27.
 */
public interface UserinfoService {
    int insert(Userinfo record);

    ArrayList<Userinfo> selectSelective(Userinfo record);
}

package com.springmvc.util;

import java.security.MessageDigest;

/**
 * Created by toutou on 2018/5/27.
 */
public class Encryption {
    // MD5加码。32位
    public static String MD5(String inStr) {
        MessageDigest md5 = null;
        try {
            md5 = MessageDigest.getInstance("MD5");
        } catch (Exception e) {
            System.out.println(e.toString());
            e.printStackTrace();
            return "";
        }
        char[] charArray = inStr.toCharArray();
        byte[] byteArray = new byte[charArray.length];

        for (int i = 0; i < charArray.length; i++)
            byteArray[i] = (byte) charArray[i];

        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));
        }

        return hexValue.toString();
    }

    // 可逆的加密算法
    public static String KL(String inStr) {
        // String s = new String(inStr);
        char[] a = inStr.toCharArray();
        for (int i = 0; i < a.length; i++) {
            a[i] = (char) (a[i] ^ 't');
        }
        String s = new String(a);
        return s;
    }

    // 加密后解密
    public static String JM(String inStr) {
        char[] a = inStr.toCharArray();
        for (int i = 0; i < a.length; i++) {
            a[i] = (char) (a[i] ^ 't');
        }
        String k = new String(a);
        return k;
    }

    /*// 测试主函数
    public static void main(String args[]) {
        String s = new String("123123");
        System.out.println("原始：" + s);
        System.out.println("MD5后：" + MD5(s));
        System.out.println("MD5后再加密：" + KL(MD5(s)));
        System.out.println("解密为MD5后的：" + JM(KL(MD5(s))));
    }*/

    /**
     * 创建指定数量的随机字符串
     *
     * @param numberFlag
     *            是否是数字
     * @param length
     * @return
     */
    public static String generateQC(boolean numberFlag, int length) {
        String retStr = "";
        String strTable = numberFlag ? "1234567890"
                : "1234567890abcdefghijkmnpqrstuvwxyz";
        int len = strTable.length();
        boolean bDone = true;
        do {
            retStr = "";
            int count = 0;
            for (int i = 0; i < length; i++) {
                double dblR = Math.random() * len;
                int intR = (int) Math.floor(dblR);
                char c = strTable.charAt(intR);
                if (('0' <= c) && (c <= '9')) {
                    count++;
                }
                retStr += strTable.charAt(intR);
            }
            if (count >= 2) {
                bDone = false;
            }
        } while (bDone);

        return retStr;
    }
}

package com.springmvc.controller;

import com.springmvc.entity.Userinfo;
import com.springmvc.service.UserinfoService;
import com.springmvc.util.Encryption;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import javax.servlet.http.HttpSession;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

/**
 * Created by toutou on 2018/5/27.
 */
@Controller
public class userController {
    @Autowired
    private UserinfoService userService;

    @RequestMapping(value="/user/login", method = RequestMethod.GET)
    public String login() {
        return "login";
    }

    @RequestMapping(value = "/user/login", method = RequestMethod.POST)
    public String loginValidate(HttpSession session, Model model, @ModelAttribute Userinfo user) {
        List<Userinfo> list = new ArrayList<Userinfo>();
        Userinfo record  = new Userinfo();
        record.setName(user.getName());
        list = userService.selectSelective(record);
        if (list.size() == 0) {
            model.addAttribute("status", 1);
        } else {
            record.setPw(Encryption.MD5(user.getPw()));
            list = userService.selectSelective(record);
            if (list.size() == 0) {
                model.addAttribute("status", 2);
            }
            record = list.get(0);
            session.setAttribute("userinfo", record);
            model.addAttribute("status", 0);
        }

        return "login";
    }
}

<%--
  Created by IntelliJ IDEA.
  User: toutou
  Date: 2018/5/27
  Time: 16:07
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>登录页面</title>
</head>
<body>
<div>
    <form id="zc" action="/user/login" method="post">
        用户名：<input type="text" required id="name" name="name"><br>
        密码：<input type="password" required id="pw" name="pw"><br>
        <input type="submit" value="登录">
        <input type="button" value="注册" onclick="location.href='/user/register'">
    </form>
</div>
</body>
<script>

    //对应后台返回的提示
    if ('${status}' != '') {
        if ('${status}' == 0) {
            alert('登录成功,即将跳转至用户详情页！')
            location.href = '/user/userInfo'
        }else if ('${status}' == 1) {
            alert('该账户不存在！');
        }
        else if ('${status}' == 2) {
            alert('密码错误！')
        }
    }
</script>
</html>

@RequestMapping(value="/user/userInfo", method = RequestMethod.GET)
    public String userInfo(Model model, HttpSession session) {
        Userinfo user = (Userinfo) session.getAttribute("userinfo");
        if(user != null){
            model.addAttribute("user", user);
        }

        return "userInfo";
    }

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%--
  Created by IntelliJ IDEA.
  User: toutou
  Date: 2018/5/27
  Time: 22:09
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>个人中心</title>
</head>
<body>
<div>
    <c:if test="${not empty user}">
        <div>欢迎您，${user.name}${user.sex?'女士':'先生'}             <a href="/user/logout">注销</a></div></div>
    </c:if>
    <c:if test="${ empty user}">
        对不起，请先<a href="/user/login">登录</a>
    </c:if>
</div>
</body>
</html>

@RequestMapping(value = "/user/logout", method = RequestMethod.GET)
    public String logout(HttpSession session) {
        session.invalidate();
        //session.removeAttribute("user");
        return "login";
    }