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推荐文章：Java 面试知识点解析；Mysql优化技巧（数据库设计、命名规范、索引优化
通过前面10篇文章的学习，相信我们对SpringBoot已经有了一些了解，那么如何来验证我们的学习成果呢？当然是通过做项目来证明啦！所以从这一篇开始我将会对之前自己做的.net项目用java来重写。这一篇，我们来现实登录模块。
一提到登录，我们首先想到的基本的功能点就有如下：
输入：用户名、密码、验证码。
登录成功后，跳转到后台。如果未登录直接访问后台，将会跳转到登录页面。
这里暂不考虑复杂的登录实现。
技术选型，沿用前面用到的知识点。那么这里较之于之前的文章，新用到的一个就是图片验证码，一个就是权限拦截器了。
1、新建spring boot web项目，具体配置信息如pom.xml所示：
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.yujie</groupId> <artifactId>website</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>website</name> <description>通用角色权限管理系统</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.13.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!--mybatis--> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>1.3.2</version> </dependency> <!--mysql--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <scope>runtime</scope> </dependency> <!--集成druid，使用连接池--> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.1.0</version> </dependency> <!--thymeleaf--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-thymeleaf</artifactId> </dependency> <dependency> <groupId>net.sourceforge.nekohtml</groupId> <artifactId>nekohtml</artifactId> <version>1.9.22</version> </dependency> <!-- 分页插件 --> <dependency> <groupId>com.github.pagehelper</groupId> <artifactId>pagehelper-spring-boot-starter</artifactId> <version>1.1.2</version> </dependency> <!--单元测试--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <!--热部署--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <optional>true</optional> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> <!-- mybatis generator 自动生成代码插件 --> <plugin> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-maven-plugin</artifactId> <version>1.3.2</version> <configuration> <configurationFile>${basedir}/src/main/resources/generator/generatorConfig.xml</configurationFile> <overwrite>true</overwrite> <verbose>true</verbose> </configuration> </plugin> </plugins> <resources> <resource> <directory>src/main/java</directory> <includes> <include>**/*.xml</include> </includes> <filtering>true</filtering> </resource> </resources> </build> </project>
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2、准备数据库、数据表。这里只用一张用户表t_user.sql
/* Navicat MySQL Data Transfer Source Server : localhost Source Server Version : 50717 Source Host : localhost:3306 Source Database : rightcontrol Target Server Type : MYSQL Target Server Version : 50717 File Encoding : 65001 Date: 2018-07-13 11:19:03 */ SET FOREIGN_KEY_CHECKS=0; -- ---------------------------- -- Table structure for `t_user` -- ---------------------------- DROP TABLE IF EXISTS `t_user`; CREATE TABLE `t_user` ( `Id` int(4) NOT NULL AUTO_INCREMENT, `UserName` varchar(20) DEFAULT NULL COMMENT '用户名（登录）', `RealName` varchar(20) DEFAULT NULL COMMENT '姓名', `PassWord` char(32) DEFAULT NULL COMMENT '密码', `RoleId` int(4) DEFAULT NULL COMMENT '角色ID', `Status` bit(1) DEFAULT NULL COMMENT '状态', `CreateOn` datetime DEFAULT NULL COMMENT '创建时间', `UpdateOn` datetime DEFAULT NULL COMMENT '修改时间', `CreateBy` int(4) DEFAULT NULL COMMENT '创建者', `UpdateBy` int(4) DEFAULT NULL COMMENT '修改者', `Gender` tinyint(4) DEFAULT NULL COMMENT '性别（0：男，1：女）', `Phone` varchar(11) DEFAULT NULL COMMENT '手机', `Email` varchar(30) DEFAULT NULL COMMENT '邮箱', `Remark` varchar(50) DEFAULT NULL COMMENT '备注', `HeadShot` varchar(50) DEFAULT NULL COMMENT '头像', PRIMARY KEY (`Id`) ) ENGINE=InnoDB AUTO_INCREMENT=45 DEFAULT CHARSET=utf8; -- ---------------------------- -- Records of t_user -- ---------------------------- INSERT INTO `t_user` VALUES ('1', 'admin', '超级管理员', 'e10adc3949ba59abbe56e057f20f883e', '1', '', '0001-01-01 00:00:00', '2018-05-12 21:47:34', '0', '1', '0', '15243641131', '[email protected]', null, '/Upload/img/mmexport1510485826478[1]_看图王_2.jpg'); INSERT INTO `t_user` VALUES ('4', 'test', 'test', 'e10adc3949ba59abbe56e057f20f883e', '12', '', '2018-04-26 10:35:56', '2018-04-29 10:36:12', '0', null, null, null, null, null, null); INSERT INTO `t_user` VALUES ('24', '3', '3', null, '1', '', '2018-04-29 08:42:00', '0001-01-01 00:00:00', '1', null, null, null, null, null, null); INSERT INTO `t_user` VALUES ('25', '2', '2', null, '1', '', '2018-04-29 08:57:05', '0001-01-01 00:00:00', '1', null, null, null, null, null, null); INSERT INTO `t_user` VALUES ('26', '34', '44', null, '1', '', '2018-04-29 08:58:31', '0001-01-01 00:00:00', '1', null, null, null, null, null, null); INSERT INTO `t_user` VALUES ('27', '34', '3', null, '1', '', '2018-04-29 08:59:22', '0001-01-01 00:00:00', '1', null, null, null, null, null, null); INSERT INTO `t_user` VALUES ('28', 'a', 'a', null, '1', '', '2018-04-29 09:04:29', '0001-01-01 00:00:00', '1', null, null, null, null, null, null); INSERT INTO `t_user` VALUES ('29', 't', 't', null, '1', '', '2018-04-29 09:05:24', '0001-01-01 00:00:00', '1', null, null, null, null, null, null); INSERT INTO `t_user` VALUES ('30', '44', '44', 'e10adc3949ba59abbe56e057f20f883e', '1', '', '2018-04-29 09:16:44', '0001-01-01 00:00:00', '1', null, null, null, null, null, null); INSERT INTO `t_user` VALUES ('31', '4', '4', null, '1', '', '2018-04-29 09:17:29', '0001-01-01 00:00:00', '1', null, null, null, null, null, null); INSERT INTO `t_user` VALUES ('32', '4', '4', null, '1', '', '2018-04-29 09:18:57', '0001-01-01 00:00:00', '1', null, null, null, null, null, null); INSERT INTO `t_user` VALUES ('33', '23', '22', 'E10ADC3949BA59ABBE56E057F20F883E', '1', '', '2018-04-29 09:19:55', '0001-01-01 00:00:00', '1', null, null, null, null, null, null); INSERT INTO `t_user` VALUES ('34', '4', '4', null, '1', '', '2018-04-29 09:32:53', '0001-01-01 00:00:00', '1', null, null, null, null, null, null); INSERT INTO `t_user` VALUES ('35', '21', '21', 'e10adc3949ba59abbe56e057f20f883e', '2', '', '2018-04-29 09:33:13', '0001-01-01 00:00:00', '1', null, null, null, null, null, null); INSERT INTO `t_user` VALUES ('36', '4', '4', null, '2', '', '2018-04-29 09:33:30', '2018-04-29 17:29:18', '0', null, null, null, null, null, null); INSERT INTO `t_user` VALUES ('37', '41', '4', 'e10adc3949ba59abbe56e057f20f883e', '1', '', '2018-04-29 09:40:58', '2018-04-29 13:10:08', '0', null, null, null, null, null, null); INSERT INTO `t_user` VALUES ('38', '41', '4', null, '1', '', '0001-01-01 00:00:00', '2018-04-29 10:32:02', '0', null, null, null, null, null, null); INSERT INTO `t_user` VALUES ('40', '41', '41', null, '2', '', '0001-01-01 00:00:00', '2018-04-29 10:08:50', '0', null, null, null, null, null, null); INSERT INTO `t_user` VALUES ('41', '61', '6', null, '2', '', '0001-01-01 00:00:00', '2018-04-29 10:08:09', '0', null, null, null, null, null, null); INSERT INTO `t_user` VALUES ('42', '451', '55', null, '1', '', '0001-01-01 00:00:00', '2018-04-29 10:31:36', '0', null, null, null, null, null, null); INSERT INTO `t_user` VALUES ('43', '41', '41', null, '2', '', '0001-01-01 00:00:00', '2018-04-29 10:07:36', '0', null, null, null, null, null, null); INSERT INTO `t_user` VALUES ('44', '661', '661', null, '2', '', '0001-01-01 00:00:00', '2018-04-29 10:06:52', '0', null, null, null, null, null, null);
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3、对项目进行配置。我对配置项进行了详实的注释，如有不懂的，自己翻阅相关文档。
application.yml
spring:
profiles:
active: dev
application-dev.yml
server: port: 8080 spring: thymeleaf: cache: false #开发阶段，建议关闭Thymeleaf的缓存 mode: LEGACYHTML5 #使用遗留的html5以去掉对html标签的校验 datasource: name: demo url: jdbc:mysql://127.0.0.1:3306/RightControl?useSSL=false&useUnicode=true&characterEncoding=utf-8&zeroDateTimeBehavior=convertToNull&autoReconnect=true username: root password: yujie # 使用druid数据源 type: com.alibaba.druid.pool.DruidDataSource driver-class-name: com.mysql.jdbc.Driver filters: stat maxActive: 20 # 最大活跃数 initialSize: 5 # 初始化数量 maxWait: 60000 minIdle: 1 timeBetweenEvictionRunsMillis: 60000 minEvictableIdleTimeMillis: 300000 validationQuery: select 'x' testWhileIdle: true testOnBorrow: false testOnReturn: false poolPreparedStatements: true maxOpenPreparedStatements: 20 mybatis: mapper-locations: classpath:mapping/*.xml #Locations of Mapper xml config file. type-aliases-package: com.yujie.dao #Packages to search for type aliases. (Package delimiters are ",; ") #pagehelper分页插件 pagehelper: helperDialect: mysql reasonable: true #pageNum<=0 时会查询第一页， pageNum>pages（超过总数时），会查询最后一页 supportMethodsArguments: true #支持通过 Mapper 接口参数来传递分页参数 #用于从对象中根据属性名取值，可以配置 pageNum,pageSize,count,pageSizeZero,reasonable。 #不配置映射的用默认值，默认值为pageNum=pageNum;pageSize=pageSize;count=countSql;reasonable=reasonable;pageSizeZero=pageSizeZero params: count=countSql
4、自动生成mybatis相关的配置，具体如何生成这个可以参考我前面的文章。从.Net到Java学习第三篇——spring boot+mybatis+mysql
在自动生成好的mybatis配置中，我们还需要自己扩展一个方法CheckLogin用于校验用户名和密码是否正确。
我们首先修改UserModelMapper类，需要注意的是checkLogin方法中的参数前面一定要记得添加@Param，因为mybatis很坑的一个地方，是对于单个参数，你不需要添加@Param，对于多个参数你必须要添加@Param，否则会报错，提示找不到参数。
@Component public interface UserModelMapper { int deleteByPrimaryKey(Integer id); int insert(UserModel record); int insertSelective(UserModel record); UserModel selectByPrimaryKey(Integer id); int updateByPrimaryKeySelective(UserModel record); int updateByPrimaryKey(UserModel record); //add UserModel checkLogin(@Param("username") String username,@Param("password") String password); }
接下来修改UserModelMapper.xml，在其中添加一个checkLogin
<sql id="Base_Column_List"> Id, UserName, RealName, PassWord, RoleId, Status, CreateOn, UpdateOn, CreateBy, UpdateBy, Gender, Phone, Email, Remark, HeadShot </sql> <select id="checkLogin" resultMap="BaseResultMap"> select <include refid="Base_Column_List" /> from t_user where username=#{username,jdbcType=VARCHAR} and password=#{password,jdbcType=VARCHAR} </select>
5、增加验证码的实现类ValidateCode
package com.yujie.util; import javax.imageio.ImageIO; import java.awt.*; import java.awt.image.BufferedImage; import java.io.FileOutputStream; import java.io.IOException; import java.io.OutputStream; import java.util.Random; /** * 验证码生成器 * * @author */ public class ValidateCode { // 图片的宽度。 private int width = 160; // 图片的高度。 private int height = 40; // 验证码字符个数 private int codeCount = 5; // 验证码干扰线数 private int lineCount = 150; // 验证码 private String code = null; // 验证码图片Buffer private BufferedImage buffImg = null; // 验证码范围,去掉0(数字)和O(拼音)容易混淆的(小写的1和L也可以去掉,大写不用了) private char[] codeSequence = {'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', '1', '2', '3', '4', '5', '6', '7', '8', '9'}; /** * 默认构造函数,设置默认参数 */ public ValidateCode() { this.createCode(); } /** * @param width 图片宽 * @param height 图片高 */ public ValidateCode(int width, int height) { this.width = width; this.height = height; this.createCode(); } /** * @param width 图片宽 * @param height 图片高 * @param codeCount 字符个数 * @param lineCount 干扰线条数 */ public ValidateCode(int width, int height, int codeCount, int lineCount) { this.width = width; this.height = height; this.codeCount = codeCount; this.lineCount = lineCount; this.createCode(); } public void createCode() { int x = 0, fontHeight = 0, codeY = 0; int red = 0, green = 0, blue = 0; x = width / (codeCount + 2);//每个字符的宽度(左右各空出一个字符) fontHeight = height - 2;//字体的高度 codeY = height - 4; // 图像buffer buffImg = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); Graphics2D g = buffImg.createGraphics(); // 生成随机数 Random random = new Random(); // 将图像填充为白色 g.setColor(Color.WHITE); g.fillRect(0, 0, width, height); // 创建字体,可以修改为其它的 Font font = new Font("Fixedsys", Font.PLAIN, fontHeight); // Font font = new Font("Times New Roman", Font.ROMAN_BASELINE, fontHeight); g.setFont(font); for (int i = 0; i < lineCount; i++) { // 设置随机开始和结束坐标 int xs = random.nextInt(width);//x坐标开始 int ys = random.nextInt(height);//y坐标开始 int xe = xs + random.nextInt(width / 8);//x坐标结束 int ye = ys + random.nextInt(height / 8);//y坐标结束 // 产生随机的颜色值，让输出的每个干扰线的颜色值都将不同。 red = random.nextInt(255); green = random.nextInt(255); blue = random.nextInt(255); g.setColor(new Color(red, green, blue)); g.drawLine(xs, ys, xe, ye); } // randomCode记录随机产生的验证码 StringBuffer randomCode = new StringBuffer(); // 随机产生codeCount个字符的验证码。 for (int i = 0; i < codeCount; i++) { String strRand = String.valueOf(codeSequence[random.nextInt(codeSequence.length)]); // 产生随机的颜色值，让输出的每个字符的颜色值都将不同。 red = random.nextInt(255); green = random.nextInt(255); blue = random.nextInt(255); g.setColor(new Color(red, green, blue)); g.drawString(strRand, (i + 1) * x, codeY); // 将产生的四个随机数组合在一起。 randomCode.append(strRand); } // 将四位数字的验证码保存到Session中。 code = randomCode.toString(); } public void write(String path) throws IOException { OutputStream sos = new FileOutputStream(path); this.write(sos); } public void write(OutputStream sos) throws IOException { ImageIO.write(buffImg, "png", sos); sos.close(); } public BufferedImage getBuffImg() { return buffImg; } public String getCode() { return code.toLowerCase(); } }
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这里需要注意的是假设我们要让验证码大小写不敏感，那么需要code.toLowerCase();对生成的验证码字符串进行转换。
6、新增一个ajax对象类AjaxResult
package com.yujie.util; public class AjaxResult { /// <summary> /// 操作结果类型 /// </summary> public Object state; /// <summary> /// 获取 消息内容 public String message; /// <summary> /// 获取 返回数据 /// </summary> public Object data; public Object getState() { return state; } public void setState(Object state) { this.state = state; } public String getMessage() { return message; } public void setMessage(String message) { this.message = message; } public Object getData() { return data; } public void setData(Object data) { this.data = data; } public static AjaxResult ok(String msg){ AjaxResult model=new AjaxResult(); model.setMessage(msg); model.state="success"; return model; } public static AjaxResult error(String msg){ AjaxResult model=new AjaxResult(); model.setMessage(msg); model.state="fail"; return model; } }
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7、添加控制器LoginController
@Controller @RequestMapping("/login") public class LoginController extends BaseController { @Autowired IUserService userService; @GetMapping("") public String login(Model model){ model.addAttribute("title","后台管理系统"); return render("login"); } @ResponseBody @PostMapping("/CheckLogin") public AjaxResult CheckLogin(@RequestParam String username, @RequestParam String password, @RequestParam String code, HttpServletRequest request, HttpServletResponse response){ Object objCode=request.getSession().getAttribute("code"); String _code=objCode.toString().toLowerCase(); if(!code.equals(_code)){ return AjaxResult.error("验证码错误，请重新输入！"); } UserModel userModel=userService.CheckLogin(username,password); if(userModel==null) { return AjaxResult.error("用户名或密码，请重新输入！"); }else { request.getSession().setAttribute("userinfo",userModel); return AjaxResult.ok("成功"); } } /** * 响应验证码页面 * @return */ @GetMapping(value="/GetAuthCode") public String validateCode(HttpServletRequest request, HttpServletResponse response) throws Exception{ // 设置响应的类型格式为图片格式 response.setContentType("image/jpeg"); //禁止图像缓存。 response.setHeader("Pragma", "no-cache"); response.setHeader("Cache-Control", "no-cache"); response.setDateHeader("Expires", 0); HttpSession session = request.getSession(); ValidateCode vCode = new ValidateCode(120,40,4,100); session.setAttribute("code", vCode.getCode()); vCode.write(response.getOutputStream()); return null; } }
考虑到一些公共的信息，我添加了一个控制器的父类BaseController
public abstract class BaseController { public static String THEME = "admin"; public BaseController title(HttpServletRequest request, String title) { request.setAttribute("title", title); return this; } /** * 主页的页面主题 * @param viewName * @return */ public String render(String viewName) { return THEME + "/" + viewName; } public String render_404() { return "comm/error_404"; } protected WebSiteModel GetWebSiteModel(){ WebSiteModel model=new WebSiteModel(); model.setSiteName("网站后台管理系统"); return model; } protected UserModel GetUserInfo(HttpServletRequest request){ HttpSession session = request.getSession(); if (null == session) { return null; } return (UserModel)session.getAttribute("userinfo"); } }
8、实现服务层，添加IUserService接口，接口的命名我沿用C#的规范首字母用I
public interface IUserService extends IBaseService<UserModel> { UserModel CheckLogin(String username, String password); }
9、添加接口的实现类UserService
package com.yujie.service.impl; import com.yujie.dao.UserModelMapper; import com.yujie.model.UserModel; import com.yujie.service.IUserService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; @Service public class UserService implements IUserService { @Autowired UserModelMapper userModelMapper; @Override public UserModel CheckLogin(String username, String password) { return userModelMapper.checkLogin(username,password); } }
接触java的时间不长，发现一个很有意思的想象，不知道是否是写java默认约定，那就是实现类都是单独用一个叫做impl的包封装。
10、剩下的就是View了，
<!DOCTYPE html> <html xmlns:th="http://www.thymeleaf.org"> <head> <meta charset="UTF-8"/> <title>快速开发平台</title> <link th:href="@{/fonts/iconfont.css}" rel="stylesheet" /> <link th:href="@{/css/login.css}" rel="stylesheet" /> <script th:src="@{/js/jquery-1.10.2.min.js}"></script> <script th:src="@{/js/jquery.cookie.js}"></script> <script th:src="@{/js/jquery.md5.js}"></script> <!--[if lte IE 8]> <div id="errorie"><div>您还在使用老掉牙的IE，正常使用系统前请升级您的浏览器到 IE8以上版本 <a target="_blank" href="http://windows.microsoft.com/zh-cn/internet-explorer/ie-8-worldwide-languages">点击升级</a> 强烈建议您更改换浏览器：<a href="http://down.tech.sina.com.cn/content/40975.html" target="_blank">谷歌 Chrome</a></div></div> <![endif]--> </head> <body> <div style="position: absolute; z-index: 999; top: 20px; left: 20px; color: #fff; font-size: 13px; line-height: 22px;"> 用户名 admin，密码 123456，请勿在系统内发表不文明信息 </div> <div class="wrapper"> <div class="container"> <div class="logo"> <i class="iconfont icon-ditu"></i> <h1><span>登录</span><span th:text="${title}" th:remove="tag"></span></h1> </div> <form class="form"> <div class="row"> <input id="txt_account" type="text" placeholder="用户名"> <i class="fa fa-user"></i> </div> <div class="row"> <input id="txt_password" type="password" placeholder="登录密码"> <i class="fa fa-key"></i> </div> <div class="row"> <input id="txt_code" maxlength="4" type="text" placeholder="验证码" style="width: 190px; float: left;"> <div style="width: 110px; float: right; padding-top: 14px; padding-left: 14px;"> 看不清？<a id="switchCode" href="javascript:void();" style="text-decoration: none;">换一张</a> <img id="imgcode" class="authcode" th:src="@{/login/GetAuthCode}" width="80" height="25" /> </div> </div> <div class="row"> <button id="login_button" type="button"><span>登录</span></button> </div> <div class="row"> </div> </form> <div class="login_tips"></div> </div> <ul class="bg-bubbles"> <li></li> <li></li> <li></li> <li></li> <li></li> <li></li> <li></li> <li></li> <li></li> <li></li> </ul> </div> <div class="copyright"> <a href="@ViewBag.SiteDomain" style="text-decoration:none;color:#fff;" target="_blank">@ViewBag.CopyRight 开发团队出品</a> <br> 适用浏览器：IE8以上、360、FireFox、Chrome、Safari、Opera、傲游、搜狗、世界之窗. </div> <script type="text/javascript"> (function ($) { $.login = { formMessage: function (msg) { $('.login_tips').find('.tips_msg').remove(); $('.login_tips').append('<div class="tips_msg"><i class="fa fa-question-circle"></i>' + msg + '</div>'); }, loginClick: function () { var $username = $("#txt_account"); var $password = $("#txt_password"); var $code = $("#txt_code"); if ($username.val() == "") { $username.focus(); $.login.formMessage('请输入用户名'); return false; } else if ($password.val() == "") { $password.focus(); $.login.formMessage('请输入登录密码。'); return false; } else if ($code.val() == "") { $code.focus(); $.login.formMessage('请输入验证码。'); return false; } else { $("#login_button").attr('disabled', 'disabled').find('span').html("loading..."); $.ajax({ url: "/login/CheckLogin", data: { username: $.trim($username.val()), password: $.md5($.trim($password.val())), code: $.trim($code.val()) }, type: "post", dataType: "json", success: function (data) { if (data.state == "success") { $("#login_button").find('span').html("登录成功，正在跳转..."); window.setTimeout(function () { window.location.href = "/home"; }, 500); } else { $("#login_button").removeAttr('disabled').find('span').html("登录"); $("#switchCode").trigger("click"); $code.val(''); $.login.formMessage(data.message); } } }); } }, init: function () { $('.wrapper').height($(window).height()); $(".container").css("margin-top", ($(window).height() - $(".container").height()) / 2 - 50); $(window).resize(function (e) { $('.wrapper').height($(window).height()); $(".container").css("margin-top", ($(window).height() - $(".container").height()) / 2 - 50); }); $("#switchCode").click(function () { $("#imgcode").attr("src", "/login/GetAuthCode?time=" + Math.random()); }); var login_error = top.$.cookie('nfine_login_error'); if (login_error != null) { switch (login_error) { case "overdue": $.login.formMessage("系统登录已超时,请重新登录"); break; case "OnLine": $.login.formMessage("您的帐号已在其它地方登录,请重新登录"); break; case "-1": $.login.formMessage("系统未知错误,请重新登录"); break; } top.$.cookie('nfine_login_error', '', { path: "/", expires: -1 }); } $("#login_button").click(function () { $.login.loginClick(); }); document.onkeydown = function (e) { if (!e) e = window.event; if ((e.keyCode || e.which) == 13) { document.getElementById("login_button").focus(); document.getElementById("login_button").click(); } } } }; $(function () { $.login.init(); }); })(jQuery); </script> </body> </html>
View Code
templates下添加admin目录，admin目录下，添加login.html页面。
这样登录就已经实现，然后我们还有一个权限拦截器啊。Java中通过实现HandlerInterceptor这个接口来进行过拦截功能，其实也可以通过继承另一个类来实现同样的功能，不过建议使用接口。具体类名，我一下子想不起来啦！O(∩_∩)O哈哈~
新建类BaseInterceptor
package com.yujie.filter;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.logging.Logger;
@Component
public class BaseInterceptor implements HandlerInterceptor {
private static final Logger logger = Logger.getLogger("BaseInterceptor");
private static final String loginUrl="/login";
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object o) throws Exception {
//1、请求到登录页面 放行
if(request.getServletPath().startsWith(loginUrl)) {
return true;
}
//2、TODO 比如退出、首页等页面无需登录，即此处要放行 允许游客的请求
//3、如果用户已经登录 放行
if(request.getSession().getAttribute("userinfo") != null) {
//更好的实现方式的使用cookie
return true;
}
//4、非法请求 即这些请求需要登录后才能访问
//重定向到登录页面
response.sendRedirect(request.getContextPath() + loginUrl);
return false;
}
@Override
public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {
}
@Override
public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {
}
}
View Code
然后我们要新建一个配置类WebMvcConfig，将这个创建的拦截器添加进来。
@Configuration public class WebMvcConfig extends WebMvcConfigurerAdapter { @Resource private BaseInterceptor baseInterceptor; @Override public void addInterceptors(InterceptorRegistry registry) { // addPathPatterns 用于添加拦截规则, 这里假设拦截 /url 后面的全部链接 // excludePathPatterns 用户排除拦截 registry.addInterceptor(baseInterceptor).addPathPatterns("/**"); } /** * 添加静态资源文件，外部可以直接访问地址 * @param registry */ @Override public void addResourceHandlers(ResourceHandlerRegistry registry) { registry.addResourceHandler("/upload/**").addResourceLocations("upload/"); super.addResourceHandlers(registry); } }
这样就一切OK了，接下来看下演示效果。
代码结构图：
感觉有.net基础的话，进行java开发还是蛮简单的。
转载：https://www.cnblogs.com/jiekzou/p/9303871.html
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