Springboot+Thymeleaf+Jpa實現登錄功能(附源碼)
前言
最近有學習到關於Springboot+Thymeleaf+Jpa的綜合運用知識,因此想寫一個簡單的登錄界面來嘗試一下,以下將展示具體流程
具體實現
首先要創建一個springboot項目
添加以下依賴項
pom.xml代碼
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.4.5</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>com.example</groupId> <artifactId>demo1</artifactId> <version>0.0.1-SNAPSHOT</version> <name>demo1</name> <description>Demo project for Spring Boot</description> <properties> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jpa</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-jdbc</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-thymeleaf</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <scope>runtime</scope> <optional>true</optional> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <scope>runtime</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
配置文件application.yml的代碼
在mysql://localhost:3306/後更改為自己的數據庫名字,另外username和password同樣更改為自己數據庫的用戶名和密碼
spring: thymeleaf: mode: HTML datasource: url: jdbc:mysql://localhost:3306/demo1?useUnicode=true&characterEncoding=utf-8&serverTimezone=Asia/Shanghai username: root password: root jpa: hibernate: ddl-auto: update show-sql: true
Po(實體)層代碼(User.java)
建立一個簡單的用戶類,裡面包含id主鍵(用jpa寫po層必須要有主鍵用@id註解)
@Entity public class User { @Id private Integer id; private String name; private String password; public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } @Override public String toString() { return "User{" + "id=" + id + ", name='" + name + '\'' + ", password='" + password + '\'' + '}'; } }
Dao(數據庫操作)層代碼(UserDao.java)
創建一個接口繼承jpa的數據庫操作<>裡第一個參數,代表要操作的具體哪一個Po層,第二個參數代表這個Po層的主鍵類型
寫瞭一個方法(也就是JPA最香的地方,可以通過簡單的名字對應關系進行sql的查找)通過name和password查找一個用戶
public interface UserDao extends JpaRepository<User,Integer> { User findByNameAndPassword(String name,String password); }
Service(服務)層代碼
Service層接口(Userservice.java)
public interface UserService { User finduser(String name,String password); }
Service層具體實現(UserServiceimpl.java)
@Service public class UserServiceImpl implements UserService { @Autowired UserDao userDao; @Override public User finduser(String name, String password) { return userDao.findByNameAndPassword(name,password); } }
驗證碼功能
因為要用到瞭驗證碼的實現功能,所以采取瞭一位大佬的驗證碼生成的操作進行集成
它的工具類 VerifyCode.java以及CaptchaController.java本博客就不貼瞭,移步大佬博客進行使用即可
參考文章(關於驗證碼)
Controller(控制)層代碼(LoginController.java)
@Controller public class LoginController { @Autowired UserService userService; @RequestMapping("/") public String login() { return "login"; } @RequestMapping("/dologin") public String dologin(User user, HttpSession session, String verifycode, Model model) { User user1=userService.finduser(user.getName(), user.getPassword()); String code= (String) session.getAttribute("verifyCode"); if(user1!=null&&code.equalsIgnoreCase(verifycode)) { model.addAttribute("message","成功"); return "enter"; } else { model.addAttribute("message","失敗"); return "enter"; } } }
Html頁面代碼
註意三個input裡面的name屬性,很多初學者(包括我)會好奇Controller是怎麼獲取網頁上輸入的具體的值?
實際上就是通過name屬性比如說第一個參數user,因為它裡面有user.name和user.password屬性,因此可以通過在html裡進行對name屬性的更改來實現數據的尋找,第二個參數verifycode也是一樣的道理註意驗證碼後的input框的name屬性是verifycode,第三個屬性model也是常用屬性,此處是為瞭在頁面上進行具體的消息顯示
public String dologin(User user, HttpSession session, String verifycode, Model model)
登錄頁面(login.html)
<!DOCTYPE html> <html lang="en" xmlns:th="http://www.w3.org/1999/xhtml"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <form action="/dologin"> <div> <span> 名字: </span> <input type="text" name="name" > </div> <div> <span> 密碼: </span> <input type="password" name="password" > </div> <div> <span> 驗證碼 </span> <input type="text" name="verifycode"> </div> <div> <a href="javascript:void(0);" rel="external nofollow" title="點擊更換驗證碼"> <img th:src="@{getVerifyCode}" onclick="changeCode()" class="verifyCode"/> </a> </div> <div> <button type="submit">登錄</button> </div> </form> <script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script> <script> function changeCode() { const src = "/getVerifyCode?" + new Date().getTime(); //加時間戳,防止瀏覽器利用緩存 $('.verifyCode').attr("src", src); } </script> </body> </html>
判斷登錄是否成功的頁面(enter.html)
通過Thymeleaf的表達式,對message進行取值,來反應登錄是否成功
model.addAttribute("message","成功"); model.addAttribute("message","失敗");
<!DOCTYPE html> <html lang="en" xmlns:th="http://www.w3.org/1999/xhtml"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <h2 th:text="${message}"> 登錄成功 </h2> </body> </html>
最後的項目目錄結構
到此這篇關於Springboot+Thymeleaf+Jpa實現登錄功能(附源碼)的文章就介紹到這瞭,更多相關Springboot Thymeleaf Jpa登錄內容請搜索WalkonNet以前的文章或繼續瀏覽下面的相關文章希望大傢以後多多支持WalkonNet!
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