• Thymeleaf学习（2）—— 流程控制

    一. each（循环）

            

    1. 循环List

    1. html>
    3. <html lang="en" xmlns:th="http://www.thymeleaf.org">
    4. <head>
    5.     <meta charset="UTF-8">
    6.     <title>Titletitle>
    7. head>
    8. <body>
    9.     <table>
    10.         <tr>
    11.             <td>idtd>
    12.             <td>姓名td>
    13.             <td>年龄td>
    14.         tr>
    15.         <tr th:each="user:${userList}">
    16.             <td th:text="${user.id}">td>
    17.             <td th:text="${user.name}">td>
    18.             <td th:text="${user.age}">td>
    19.         tr>
    20.     table>
    21.  
    22. body>
    23. html>
    1. package com.xdu.studyspringboot.controller;
    2.  
    3. import com.xdu.studyspringboot.pojo.User;
    4. import org.springframework.stereotype.Controller;
    5. import org.springframework.web.bind.annotation.RequestMapping;
    6.  
    7. import javax.servlet.http.HttpServletRequest;
    8. import java.util.ArrayList;
    9. import java.util.List;
    10.  
    11. @Controller
    12. public class ThymeleafController {
    13.     @RequestMapping("/eachList")
    14.     public String testEachList(HttpServletRequest request){
    15.         List users = new ArrayList<>();
    16.         users.add(new User(1, "Tom", 22));
    17.         users.add(new User(2, "Jack", 21));
    18.         users.add(new User(3, "Bob", 23));
    19.  
    20.         request.setAttribute("userList", users);
    21.         return "test";
    22.     }
    23. }

    2. 循环Array

    1. html>
    3. <html lang="en" xmlns:th="http://www.thymeleaf.org">
    4. <head>
    5.     <meta charset="UTF-8">
    6.     <title>Titletitle>
    7. head>
    8. <body>
    9.     <table>
    10.         <tr>
    11.             <td>idtd>
    12.             <td>姓名td>
    13.             <td>年龄td>
    14.         tr>
    15.         <tr th:each="user:${userArray}">
    16.             <td th:text="${user.id}">td>
    17.             <td th:text="${user.name}">td>
    18.             <td th:text="${user.age}">td>
    19.         tr>
    20.     table>
    21.  
    22. body>
    23. html>
    1. package com.xdu.studyspringboot.controller;
    2.  
    3. import com.xdu.studyspringboot.pojo.User;
    4. import org.springframework.stereotype.Controller;
    5. import org.springframework.web.bind.annotation.RequestMapping;
    6.  
    7. import javax.servlet.http.HttpServletRequest;
    8.  
    9. @Controller
    10. public class ThymeleafController {
    11.     @RequestMapping("/eachArray")
    12.     public String testEachArray(HttpServletRequest request){
    13.         User[] users = new User[3];
    14.         users[0] = new User(1, "Tom", 22);
    15.         users[1] = new User(2, "Jack", 21);
    16.         users[2] = new User(3, "Bob", 23);
    17.  
    18.         request.setAttribute("userArray", users);
    19.         return "test";
    20.     }
    21. }

    3. 循环Map

    1. html>
    3. <html lang="en" xmlns:th="http://www.thymeleaf.org">
    4. <head>
    5.     <meta charset="UTF-8">
    6.     <title>Titletitle>
    7. head>
    8. <body>
    9.     <table>
    10.         <tr>
    11.             <td>idtd>
    12.             <td>姓名td>
    13.             <td>年龄td>
    14.         tr>
    15.         <tr th:each="user:${userMap}">
    16.             <td th:text="${user.value.id}">td>
    17.             <td th:text="${user.value.name}">td>
    18.             <td th:text="${user.value.age}">td>
    19.         tr>
    20.     table>
    21.  
    22. body>
    23. html>
    1. package com.xdu.studyspringboot.controller;
    2.  
    3. import com.xdu.studyspringboot.pojo.User;
    4. import org.springframework.stereotype.Controller;
    5. import org.springframework.web.bind.annotation.RequestMapping;
    6.  
    7. import javax.servlet.http.HttpServletRequest;
    8. import java.util.HashMap;
    9. import java.util.Map;
    10.  
    11. @Controller
    12. public class ThymeleafController {
    13.     @RequestMapping("/eachMap")
    14.     public String testEachMap(HttpServletRequest request){
    15.         Map map = new HashMap<>();
    16.         map.put("user1", new User(1, "Tom", 22));
    17.         map.put("user2", new User(2, "Jack", 21));
    18.         map.put("user3", new User(3, "Bob", 23));
    19.  
    20.         request.setAttribute("userMap", map);
    21.         return "test";
    22.     }
    23. }

    4. 循环List-Map

    1. html>
    3. <html lang="en" xmlns:th="http://www.thymeleaf.org">
    4. <head>
    5.     <meta charset="UTF-8">
    6.     <title>Titletitle>
    7. head>
    8. <body>
    9.     <table>
    10.         <tr>
    11.             <td>idtd>
    12.             <td>姓名td>
    13.             <td>年龄td>
    14.         tr>
    15.         <div th:each="userMap:${userListMap}">
    16.             <tr th:each="user:${userMap}">
    17.                 <td th:text="${user.value.id}">td>
    18.                 <td th:text="${user.value.name}">td>
    19.                 <td th:text="${user.value.age}">td>
    20.             tr>
    21.         div>
    22.     table>
    23.  
    24. body>
    25. html>
    1. package com.xdu.studyspringboot.controller;
    2.  
    3. import com.xdu.studyspringboot.pojo.User;
    4. import org.springframework.stereotype.Controller;
    5. import org.springframework.web.bind.annotation.RequestMapping;
    6.  
    7. import javax.servlet.http.HttpServletRequest;
    8. import java.util.ArrayList;
    9. import java.util.HashMap;
    10. import java.util.List;
    11. import java.util.Map;
    12.  
    13. @Controller
    14. public class ThymeleafController {
    15.     @RequestMapping("/eachListAndMap")
    16.     public String testEachListAndMap(HttpServletRequest request){
    17.         List> users = new ArrayList<>();
    18.  
    19.  
    20.         Map map1 = new HashMap<>();
    21.         map1.put("user1.1", new User(1, "Tom", 22));
    22.         map1.put("user1.2", new User(2, "Jack", 21));
    23.  
    24.         Map map2 = new HashMap<>();
    25.         map2.put("user2.1", new User(3, "Bob", 23));
    26.         map2.put("user2.2", new User(3, "Rose", 22));
    27.  
    28.         users.add(map1);
    29.         users.add(map2);
    30.  
    31.         request.setAttribute("userListMap", users);
    32.         return "test";
    33.     }
    34. }

    二. if

            如果为真，则显示该语句

    注：没有else语句

    1. html>
    3. <html lang="en" xmlns:th="http://www.thymeleaf.org">
    4. <head>
    5.     <meta charset="UTF-8">
    6.     <title>Titletitle>
    7. head>
    8. <body>
    9.     <p th:if="${age}>18">
    10.         已成年
    11.     p>
    12.  
    13.     <p th:if="${isLogin}">
    14.         已登陆
    15.     p>
    16. body>
    17. html>
    1. package com.xdu.studyspringboot.controller;
    2.  
    3. import org.springframework.stereotype.Controller;
    4. import org.springframework.web.bind.annotation.RequestMapping;
    5.  
    6. import javax.servlet.http.HttpServletRequest;
    7.  
    8. @Controller
    9. public class ThymeleafController {
    10.     @RequestMapping("/if")
    11.     public String testIf(HttpServletRequest request){
    12.         request.setAttribute("age", 20);
    13.         request.setAttribute("isLogin", true);
    14.         return "test";
    15.     }
    16. }

    三. unless

            如果为假，则显示该语句

    1. html>
    3. <html lang="en" xmlns:th="http://www.thymeleaf.org">
    4. <head>
    5.     <meta charset="UTF-8">
    6.     <title>Titletitle>
    7. head>
    8. <body>
    9.     <p th:unless="${age}<18">
    10.         未成年
    11.     p>
    12.  
    13.     <p th:unless="${isLogin}">
    14.         未登陆
    15.     p>
    16. body>
    17. html>
    1. package com.xdu.studyspringboot.controller;
    2.  
    3. import org.springframework.stereotype.Controller;
    4. import org.springframework.web.bind.annotation.RequestMapping;
    5.  
    6. import javax.servlet.http.HttpServletRequest;
    7.  
    8. @Controller
    9. public class ThymeleafController {
    10.     @RequestMapping("/unless")
    11.     public String testUnless(HttpServletRequest request){
    12.         request.setAttribute("age", 20);
    13.         request.setAttribute("isLogin", false);
    14.         return "test";
    15.     }
    16. }

    四. switch-case

    
    
     结果1 
    
    
     结果2 
    
    
     默认结果 
    

    1. html>
    3. <html lang="en" xmlns:th="http://www.thymeleaf.org">
    4. <head>
    5.     <meta charset="UTF-8">
    6.     <title>Titletitle>
    7. head>
    8. <body>
    9.     <div th:switch="${sex}">
    10.         <p th:case="man">男p>
    11.         <p th:case="woman">女p>
    12.         <p th:case="*">未知p>
    13.     div>
    14. body>
    15. html>
    1. package com.xdu.studyspringboot.controller;
    2.  
    3. import org.springframework.stereotype.Controller;
    4. import org.springframework.web.bind.annotation.RequestMapping;
    5.  
    6. import javax.servlet.http.HttpServletRequest;
    7.  
    8. @Controller
    9. public class ThymeleafController {
    10.     @RequestMapping("/switch")
    11.     public String testSwitch(HttpServletRequest request){
    12.         request.setAttribute("sex", "man");
    13.  
    14.         return "test";
    15.     }
    16. }

    五. 运算符

    1. html>
    3. <html lang="en" xmlns:th="http://www.thymeleaf.org">
    4. <head>
    5.     <meta charset="UTF-8">
    6.     <title>Titletitle>
    7. head>
    8. <body>
    9.     
    10.     <p th:text="${12 + 13}">结果p>
    11.  
    12.     
    13.     <p th:if="${age > 18}">已成年p>
    14.  
    15.     
    16.     <p th:if="${name == null}">用户名为空p>
    17.     <p th:if="${name != null}">用户名不为空p>
    18.     <p th:if="${name eq null}">用户名为空p>
    19.     <p th:if="${name ne null}">用户名不为空p>
    20.  
    21.     
    22.     <p th:text="${isLogin == true ? '用户已登录' : '用户未登录'}">p>
    23.     
    24.     <p th:text="${isLogin == true ? (age > 18 ? '用户已成年' : '用户未成年') : '用户未登录'}">p>
    25. body>
    26. html>
    1. package com.xdu.studyspringboot.controller;
    2.  
    3. import org.springframework.stereotype.Controller;
    4. import org.springframework.web.bind.annotation.RequestMapping;
    5.  
    6. import javax.servlet.http.HttpServletRequest;
    7.  
    8. @Controller
    9. public class ThymeleafController {
    10.     @RequestMapping("/math")
    11.     public String testMath(HttpServletRequest request){
    12.         request.setAttribute("name","Tom");
    13.         request.setAttribute("age",22);
    14.         request.setAttribute("isLogin", true);
    15.         return "test";
    16.     }
    17. }

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  • 原文地址：https://blog.csdn.net/Archer__13/article/details/126906948