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這篇文章主要介紹了Spring Boot怎么整合Thymeleaf的相關(guān)知識(shí)，內(nèi)容詳細(xì)易懂，操作簡單快捷，具有一定借鑒價(jià)值，相信大家閱讀完這篇Spring Boot怎么整合Thymeleaf文章都會(huì)有所收獲，下面我們一起來看看吧。
Spring Boot 官方推薦使用 Thymeleaf 作為其模板引擎。SpringBoot 為 Thymeleaf 提供了一系列默認(rèn)配置，并且為Thymeleaf提供了視圖解析器。項(xiàng)目中一但導(dǎo)入了 Thymeleaf 的依賴，相對(duì)應(yīng)的自動(dòng)配置 （ThymeleafAutoConfiguration） 就會(huì)自動(dòng)生效，因此 Thymeleaf 可以與 Spring Boot 完美整合 。Thymeleaf模板引擎可以和html標(biāo)簽完美結(jié)合，便于后端渲染數(shù)據(jù)。Thymeleaf支持靜態(tài)效果和動(dòng)態(tài)效果，在沒有動(dòng)態(tài)數(shù)據(jù)的時(shí)候，會(huì)展示靜態(tài)效果模板引擎是為了使用戶界面與業(yè)務(wù)數(shù)據(jù)（內(nèi)容）分離而產(chǎn)生的，它可以生成特定格式的文檔，用于網(wǎng)站的模板引擎就會(huì)生成一個(gè)標(biāo)準(zhǔn)的HTML文檔就是將模板文件和數(shù)據(jù)通過模板引擎生成一個(gè)HTML代碼**常見的模板引擎有：jsp、freemarker、velocity、thymeleafThymeleaf默認(rèn)寫的位置是在templates這個(gè)目錄下面Thymeleaf官網(wǎng):https://www.thymeleaf.org/
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-thymeleaf</artifactId> </dependency>
Thymeleaf默認(rèn)的視圖路徑是：/ resources/templates,在這個(gè)目錄下面創(chuàng)建html并引入thymeleaf
<html lang="en" xmlns:th="http://www.thymleaf.org">
xmlns:th=“http://www.thymleaf.org”>
${域?qū)傩悦鹽:獲得request域中的域?qū)傩灾挡@示
${session.域?qū)傩悦鹽: 獲得session域中的域?qū)傩灾挡@示
< p th:text="${name}">aaa</p>如果取得到數(shù)據(jù)的話，就會(huì)渲染成動(dòng)態(tài)畫面，否則就渲染成靜態(tài)畫面(只顯示學(xué)生管理系統(tǒng)只顯示學(xué)生管理系統(tǒng)這幾個(gè)字)
<span th:text="${user.name}">Tom</span>使用th:if和th:unless屬性進(jìn)行條件判斷，th:unlessth:unless剛好相反，只有表達(dá)式條件不成立才會(huì)顯示內(nèi)容
<h3 th:if="${age>=18}">成年</h3>
<h3 th:unless="${age>=18}">未成年</h3><!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymleaf.org">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
.tb-stus{
width: 900px;
margin: 0 auto;
border: black 1px solid;
border-collapse: collapse;
}
.tb-stus th,td{
padding: 10px;
text-align: center;
border:1px solid black;
}
</style>
</head>
<body>
<h3 align="center">學(xué)生管理系統(tǒng)</h3>
<table class="tb-stus">
<thead>
<tr>
<th>序號(hào)</th>
<th>姓名</th>
<th>年齡</th>
<th>性別</th>
<th>班級(jí)</th>
<th>生日</th>
<th>操作</th>
</tr>
</thead>
<tbody>
<tr th:each="stu:${stuList}">
<td>1</td>
<td th:text="${stu.name}">aa</td>
<td>22</td>
<td>男</td>
<td>計(jì)科1班</td>
<td>2022-2-3</td>
<td>
<a href="#" rel="external nofollow" >刪除</a>
</td>
</tr>
</tbody>
</table>
</body>
</html>
th:href和@{}鏈接表達(dá)式
<!--http://localhost:8080/stu/10 -->
<a th:href="${'/stus/'+ stu.id}" rel="external nofollow" >編輯學(xué)生1</a>
<!--http://localhost:8080/stu?id=10 -->
<a th:href="@{/stus(id=${stu.id})}" rel="external nofollow" >編輯學(xué)生2</a>
<!--http://localhost:8080/stu?id=10&name=abc -->
<a th:href="@{/stus(id=${stu.id},name=${stu.name})}" rel="external nofollow" >編輯學(xué)生3</a>th:switch和th:case
<div th:switch="${stu.role}">
<h3 th:case="banzhang">班長</h3>
<h3 th:case="tuanzhishu">團(tuán)支書</h3>
<h3 th:case="${data}">學(xué)委</h3>
<h3 th:case="*">其他</h3>
</div>thymeleaf默認(rèn)給變量名+Stat的狀態(tài)
如果沒有顯示設(shè)置狀態(tài)變量，thymeleaf會(huì)默認(rèn)給一個(gè)變量名+Stat的狀態(tài)
<tr th:each="stu: ${stus}">
<td th:text="${stuStat.index}"></td>
<td th:text="${ stu.name}"></td>
<td th:text="${ stu.age}"></td>
</tr>th:object可以定義對(duì)象屬性
#dates.format()可以用來格式化日期格式
*{}可以和th:object配合使用，可以取出對(duì)象中的屬性
<form th:object="${stu}">
編號(hào):<input type="text" name="id" th:value="*{id}"><br>
姓名:<input type="text" name="name" th:value="*{name}"><br>
年齡:<input type="text" name="age" th:value="*{age}"><br>
性別:<input type="radio" name="gender" value="true" th:checked="*{gender}">男<br>
性別:<input type="radio" name="gender" value="true" th:checked="*{not gender}">女<br>
生日:<input type="text" name="birth" th:value="*{#dates.format(birth,'yyyy-MM-dd')}"><br>
<input type="submit" value="編輯">
</form>創(chuàng)建項(xiàng)目的時(shí)候，記得在模板引擎中勾選Thymeleaf
在pom.xml中把MySQL驅(qū)動(dòng)的作用域刪除
然后我們這里使用druid連接池，所以需要在pom文件導(dǎo)入相關(guān)依賴
<dependency> <groupId>com.alibaba</groupId> <artifactId>druid-spring-boot-starter</artifactId> <version>1.2.11</version> </dependency>
然后我們需要在全局配置文件application.properties中進(jìn)行相關(guān)配置
# 指定Mybatis的Mapper接口的xml映射文件的路徑 mybatis.mapper-locations=classpath:mapper/*xml # MySQL數(shù)據(jù)庫驅(qū)動(dòng) #這個(gè)驅(qū)動(dòng)也可以省略，可以根據(jù)使用的MySQL自動(dòng)加載相應(yīng)的驅(qū)動(dòng) spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver # 數(shù)據(jù)源名稱 spring.datasource.name=com.alibaba.druid.pool.DruidDataSource # 數(shù)據(jù)庫連接地址 spring.datasource.url=jdbc:mysql://localhost:3306/school?serverTimezone=UTC&zeroDateTimeBehavior=convertToNull # 數(shù)據(jù)庫用戶名和密碼 spring.datasource.username=root spring.datasource.password=a87684009. # 設(shè)置日志級(jí)別 logging.level.com.zyh.springboot=debug # 開啟mybatis駝峰命名規(guī)則自動(dòng)轉(zhuǎn)換功能 mybatis.configuration.map-underscore-to-camel-case=true
數(shù)據(jù)庫準(zhǔn)備 準(zhǔn)備好數(shù)據(jù)庫中表所對(duì)應(yīng)的實(shí)體類,以及三層結(jié)構(gòu)
@Data
public class Stu {
private Integer id;
private String name;
private Integer age;
private Boolean gender;
private Integer cid;
@DateTimeFormat(pattern = "yyyy-MM-dd")
private Date birth;
}Mapper
@Mapper
public interface StuMapper {
/**
* 查詢所有學(xué)生信息
* @return
* @throws Exception
*/
@Select("select * from stu")
List<Stu> queryAllStu() throws Exception;
}Service
public interface StuService {
/**
* 查詢所有學(xué)生信息
* @return
*/
List<Stu> queryAllStu() throws Exception;
}Service的實(shí)現(xiàn)類
@Service
public class StuServiceImpl implements StuService {
@Autowired
private StuMapper stuMapper;
@Override
public List<Stu> queryAllStu() throws Exception {
return stuMapper.queryAllStu();
}
}thymeleaf
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymleaf.org">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<h3>學(xué)生管理系統(tǒng)</h3>
<h3 th:text="${name}">aaaa</h3>
</body>
</html>Controller
@Controller
@RequestMapping("/stu")
public class StuController {
@Autowired
private StuService stuService;
/**
* 顯示學(xué)生管理系統(tǒng)的畫面
* @return
*/
@RequestMapping("/stusUi")
public String stusUi(){
return "stus";
}
}
然后我們先準(zhǔn)備好頁面
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
.tb-stus{
width: 900px;
margin: 0 auto;
border: black 1px solid;
border-collapse: collapse;
}
.tb-stus th,td{
padding: 10px;
text-align: center;
border:1px solid black;
}
</style>
</head>
<body>
<h3 align="center">學(xué)生管理系統(tǒng)</h3>
<table class="tb-stus">
<thead>
<tr>
<th>序號(hào)</th>
<th>姓名</th>
<th>年齡</th>
<th>性別</th>
<th>班級(jí)</th>
<th>生日</th>
<th>操作</th>
</tr>
</thead>
<tbody>
<tr th:each="stu,status: ${stuList}">
<td th:text="${status.index+1}">1</td>
<td th:text="${stu.name}">aa</td>
<td th:text="${stu.age}">22</td>
<!-- gender的屬性值為1表示性別為男-->
<td th:if="${stu.gender}">男</td>
<td th:unless="${stu.gender}">女</td>
<td th:text="${stu.cid}">計(jì)科1班</td>
<td th:text="${#dates.format(stu.birth,'yyyy-MM-dd')}">2022-2-3</td>
<td>
<!--http://localhost:8080/stu/delete?id=10-->
<a th:href="@{/stu/delete(id=${stu.id})}" rel="external nofollow" rel="external nofollow" rel="external nofollow" >刪除</a>
</td>
</tr>
</tbody>
</table>
</body>
</html>
當(dāng)我們點(diǎn)擊刪除的時(shí)候，后端要根據(jù)前端傳過來的id來從數(shù)據(jù)庫中刪除對(duì)應(yīng)的數(shù)據(jù)。這里我們先按照我們之前學(xué)的時(shí)候，熟悉的方法來完成，到后面的時(shí)候，會(huì)詳細(xì)講前后端分離開發(fā)
Controller(之前的方法這里沒有粘貼出來，不然代碼太多了)
@Controller
@RequestMapping("/stu")
public class StuController {
@Autowired
private StuService stuService;
/**根據(jù)id刪除數(shù)據(jù)
* http://localhost:8080/stu/delete?id=10
* @return
*/
@RequestMapping("/delete")
public String deleteById(@RequestParam("id") Integer id){
try {
stuService.deleteByid(id);
} catch (Exception e) {
e.printStackTrace();
}
System.out.println(id);
return "redirect:/stu/stusUi";
}
}Service
public interface StuService {
/**
* 查詢所有學(xué)生信息
* @return
*/
List<Stu> queryAllStu() throws Exception;
void deleteByid(Integer id);
}Service實(shí)現(xiàn)類
@Service
public class StuServiceImpl implements StuService {
@Autowired
private StuMapper stuMapper;
@Override
public List<Stu> queryAllStu() throws Exception {
return stuMapper.queryAllStu();
}
/**
* 根據(jù)id刪除數(shù)據(jù)
* @param id
*/
@Override
public void deleteByid(Integer id) throws Exception {
stuMapper.deleteById(id);
}
}Mapper
@Mapper
public interface StuMapper {
/**
* 查詢所有學(xué)生信息
* @return
* @throws Exception
*/
@Select("select * from stu")
List<Stu> queryAllStu() throws Exception;
@Delete("delete from stu where id=#{id}")
void deleteById( Integer id);
}把編號(hào)為8的數(shù)據(jù)刪除
頁面stus.html
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
.tb-stus{
width: 900px;
margin: 0 auto;
border: black 1px solid;
border-collapse: collapse;
}
.tb-stus th,td{
padding: 10px;
text-align: center;
border:1px solid black;
}
</style>
</head>
<body>
<h3 align="center">學(xué)生管理系統(tǒng)</h3>
<table class="tb-stus">
<thead>
<tr>
<th>序號(hào)</th>
<th>姓名</th>
<th>年齡</th>
<th>性別</th>
<th>班級(jí)</th>
<th>生日</th>
<th>操作</th>
</tr>
</thead>
<tbody>
<tr th:each="stu,status: ${stuList}">
<td th:text="${stu.id}">1</td>
<td th:text="${stu.name}">aa</td>
<td th:text="${stu.age}">22</td>
<!-- gender的屬性值為1表示性別為男-->
<td th:if="${stu.gender}">男</td>
<td th:unless="${stu.gender}">女</td>
<td th:text="${stu.cid}">計(jì)科1班</td>
<td th:text="${#dates.format(stu.birth,'yyyy-MM-dd')}">2022-2-3</td>
<td>
<!-- localhost:8080/stu/delete/8-->
<!-- <a th:href="${'/stu/delete/'+stu.id}" rel="external nofollow" rel="external nofollow" >刪除</a>-->
<!--http://localhost:8080/stu/delete?id=10-->
<a th:href="@{/stu/delete(id=${stu.id})}" rel="external nofollow" rel="external nofollow" rel="external nofollow" >刪除</a>
<a th:href="@{/stu/edit(id=${stu.id})}" rel="external nofollow" rel="external nofollow" >編輯</a>
</td>
</tr>
</tbody>
</table>
</body>
</html>頁面 stu-edit.html
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>編輯畫面</title>
</head>
<body>
<h3 >編輯學(xué)生信息</h3>
<form action="" method="post" th:object="${stu}">
學(xué)號(hào):<input type="text" name="id" th:value="*{id}" ><br><br>
姓名:<input type="text" name="name" th:value="*{name}"><br><br>
年齡:<input type="text" name="age" th:value="*{age}"><br><br>
性別:<input type="radio" name="gender" th:checked="*{gender}" >男
<input type="radio" name="gender" th:checked="*{!gender}" >女<br><br>
班級(jí):<input type="text" name="cid" th:value="*{cid}"><br><br>
生日:<input type="text" name="birth" th:value="*{#dates.format(birth,'yyyy-MM-dd')}"><br><br>
<input type="submit" value="編輯">
</form>
</body>
</html>Controller
/**
* 根據(jù)id來修改數(shù)據(jù)
* 我們首先得先根據(jù)id把數(shù)據(jù)查詢出來，然后把數(shù)據(jù)展示出來
* 用戶再進(jìn)行編輯，用戶編輯完并且提交以后，跳轉(zhuǎn)到學(xué)生管理系統(tǒng)畫面，展示所有數(shù)據(jù)
* @return
*/
@RequestMapping("/edit")
public String edit(@RequestParam("id") Integer id,Model model){
System.out.println("id"+id);
try {
Stu stu=stuService.queryById(id);
model.addAttribute("stu",stu);
} catch (Exception e) {
e.printStackTrace();
}
return "stu-edit";
}Service
public interface StuService {
/**
* 查詢所有學(xué)生信息
* @return
*/
List<Stu> queryAllStu() throws Exception;
/**
* 根據(jù)id來刪除學(xué)生信息
* @param id
* @throws Exception
*/
void deleteByid(Integer id) throws Exception;
/**
* 根據(jù)id來查詢對(duì)應(yīng)學(xué)生信息
* @param id
* @return
* @throws Exception
*/
Stu queryById(Integer id) throws Exception;
}Service實(shí)現(xiàn)類
@Service
public class StuServiceImpl implements StuService {
@Autowired
private StuMapper stuMapper;
@Override
public List<Stu> queryAllStu() throws Exception {
return stuMapper.queryAllStu();
}
/**
* 根據(jù)id刪除數(shù)據(jù)
* @param id
*/
@Override
public void deleteByid(Integer id) throws Exception {
stuMapper.deleteById(id);
}
@Override
public Stu queryById(Integer id) throws Exception {
return stuMapper.queryById(id);
}
}Mapper
@Mapper
public interface StuMapper {
/**
* 查詢所有學(xué)生信息
* @return
* @throws Exception
*/
@Select("select * from stu")
List<Stu> queryAllStu() throws Exception;
@Delete("delete from stu where id=#{id}")
void deleteById( Integer id);
@Select("select * from stu where id=#{id}")
Stu queryById(Integer id) throws Exception;
}
比如在序號(hào)為4中，點(diǎn)擊編輯
登錄頁面：
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <h3>用戶登錄</h3> <form action="/login" method="post"> 賬號(hào):<input type="text" name="username"><br><br> 密碼:<input type="password" name="password"><br><br> <input type="submit" value="登錄"> </form> </body> </html>
因?yàn)樾枰袛嘤脩羰欠翊嬖?，這是從數(shù)據(jù)庫進(jìn)行查詢的，所以要準(zhǔn)備對(duì)應(yīng)的管理員表
# 創(chuàng)建管理員表 CREATE TABLE admin( id INT PRIMARY KEY AUTO_INCREMENT, username VARCHAR(20), `password` VARCHAR(20) ); INSERT INTO admin VALUES (DEFAULT,'aaa',111), (DEFAULT,'bbb',222), (DEFAULT,'ccc',333); # 查詢測試 SELECT * FROM admin;
準(zhǔn)備對(duì)應(yīng)的實(shí)體類
@Data
public class Admin {
private String username;
private String password;
}Controller
@Controller
@SessionAttributes(names = {"admin"})
public class AdminController {
@Autowired
private AdminService adminService;
/**
* 顯示登錄頁面
* @return
*/
@RequestMapping(value = "/loginUi")
public String loginUi(){
return "login";
}
@RequestMapping(value = "/login",method = RequestMethod.POST)
public String login(String username, String password, Model model){
try {
Admin admin = adminService.login(username, password);
//用戶名存在說明登錄成功
if (admin!=null){
//存放到session域中
model.addAttribute("admin",admin);
return "redirect:/stu/stusUi";
}
} catch (Exception e) {
e.printStackTrace();
}
return "redirect:/loginUi";
}
}Service
public interface AdminService {
Admin login(String username,String password) throws Exception;
}Service對(duì)應(yīng)的實(shí)現(xiàn)類
@Service
public class AdminServiceImpl implements AdminService {
@Autowired
private AdminMapper adminMapper;
@Override
public Admin login(String username, String password) throws Exception {
return adminMapper.queryByUsernameAndPassword(username,password);
}
}Mapper
@Mapper
public interface AdminMapper {
@Select("select * from admin where username=#{username} and password=#{password}")
Admin queryByUsernameAndPassword(@Param("username") String username, @Param("password") String password);
}
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
.tb-stus{
width: 900px;
margin: 0 auto;
border: black 1px solid;
border-collapse: collapse;
}
.tb-stus th,td{
padding: 10px;
text-align: center;
border:1px solid black;
}
</style>
</head>
<body>
<h3 align="center">學(xué)生管理系統(tǒng)</h3>
<h3 th:if="${session.admin!=null}" th:text="${session.admin.username}">用戶名</h3>
<a th:unless="${session.admin!=null}" href="/loginUi" rel="external nofollow" >登錄</a>
<a th:if="${session.admin!=null}" href="/logout" rel="external nofollow" >注銷用戶</a>
<table class="tb-stus">
<thead>
<tr>
<th>序號(hào)</th>
<th>姓名</th>
<th>年齡</th>
<th>性別</th>
<th>班級(jí)</th>
<th>生日</th>
<th>操作</th>
</tr>
</thead>
<tbody>
<tr th:each="stu,status: ${stuList}">
<td th:text="${stu.id}">1</td>
<td th:text="${stu.name}">aa</td>
<td th:text="${stu.age}">22</td>
<!-- gender的屬性值為1表示性別為男-->
<td th:if="${stu.gender}">男</td>
<td th:unless="${stu.gender}">女</td>
<td th:text="${stu.cid}">計(jì)科1班</td>
<td th:text="${#dates.format(stu.birth,'yyyy-MM-dd')}">2022-2-3</td>
<td>
<!-- localhost:8080/stu/delete/8-->
<!-- <a th:href="${'/stu/delete/'+stu.id}" rel="external nofollow" rel="external nofollow" >刪除</a>-->
<!--http://localhost:8080/stu/delete?id=10-->
<a th:href="@{/stu/delete(id=${stu.id})}" rel="external nofollow" rel="external nofollow" rel="external nofollow" >刪除</a>
<a th:href="@{/stu/edit(id=${stu.id})}" rel="external nofollow" rel="external nofollow" >編輯</a>
</td>
</tr>
</tbody>
</table>
</body>
</html>
注銷的話，我們把session域中的用戶對(duì)象取消，然后這個(gè)時(shí)候就得重新登錄，應(yīng)該要跳轉(zhuǎn)到登錄畫面
@RequestMapping("/logout")
public String logout(HttpSession session){
session.removeAttribute("admin");
return "redirect:/loginUi";
}
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