springboot2.7.15+thymeleaf

如下使用了thymeleaf的基础应用：th:text, th:each, th:if, th:unless, th:value等标签的使用

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如下的所有html放在templates 下，
配置文件不需要做任何配置
只需要在pom.xml中增加

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>

request的使用：

controller类：

 @RequestMapping("index2")
    public String xx2(Model model){
        List<Dept> list = new ArrayList<>();
        list.add(new Dept(1,"heheh",true,new Date()));
        list.add(new Dept(2,"heheh2",false,new Date()));
        list.add(new Dept(3,"hehehd",true,new Date()));
        model.addAttribute("key","测试");
        model.addAttribute("keylist",list);
        model.addAttribute("dept",new Dept(11,"呵呵呵",true,new Date()));
        return "index";
    }
     @RequestMapping("add")
    public String add(Dept dept){
        System.out.println(dept);
        return "index";
    }

    @RequestMapping("del")
    public String add1(int uid,String uname){
        System.out.println(uid+"..."+uname);
        return "index";
    }

    @RequestMapping("del1/{uid}")
    public String add11(@PathVariable("uid") int uid){
        System.out.println("del1...."+uid);
        return "redirect:../index2";
    }

index.html

<p th:text="${key}"></p>
   <p th:text="${dept.dname}"></p>
   <p th:if="${dept.did>=12}">符合</p>
   <p th:unless="${dept.did>=12}">不符合</p>
   <table>
       <tr >
           <td>编号</td>
           <td>名称</td>
           <td colspan="2">操作</td>
       </tr>

       <tr th:each="item : ${keylist}">
           <td th:text="${item.did}">编号</td>
           <td th:text="${item.dname}">名称</td>
           <td>
               <a th:href="@{del(uid=${item.did},uname='zhang')}">删除</a>
               <a th:href="${'/del1/'+ item.did}">删除1</a>
           </td>
           <td><a href="">修改</a> </td>
       </tr>
   </table>


<form action="add" method="post" th:object="${dept}">
    id:<input type="text" name="did" th:value="*{did}"/> <br/>
    姓名：<input type="text" name="dname" th:value="*{dname}"/><br/>
    性别：<input type="radio" name="gender" th:value="*{gender}" th:checked="*{gender}"/>男
    <input type="radio" name="gender" th:value="*{gender}" th:checked="*{not gender}"/>女<br/>
    出生年月日：<input type="date" name="birth" th:value="*{#dates.format(birth,'yyyy-MM-dd')}" /><br/>

    <input type="submit" value="提交">
</form>

实体类：

@Data
@NoArgsConstructor
@AllArgsConstructor
public class Dept {
    private int did;
    private String dname;
    private boolean gender;
    @DateTimeFormat(pattern = "yyyy-MM-dd")
    private Date birth;
}

session的使用，登录：

login.html

  <form action="login" method="post">
        登录名：<input name="uname" ><br/>
        登录密码：<input name="upwd" ><br/>
        <input type="submit" value="登录">
    </form>

controller类

 @RequestMapping("loginui")
    public String loginui(){
        return "login";
    }

    @RequestMapping("loginout")
    public String loginout(HttpSession session){
        session.removeAttribute("loginemp");
        return "login";
    }

    @RequestMapping("login")
    public String xx(String uname,String upwd,HttpSession session){
        if(uname.equals("admin")&& upwd.equals("123")){
            User user = new User(uname,upwd);
            session.setAttribute("loginemp",user);
            return "index";
        }else{
            return "login";
        }
    }

实体类

@Data
@NoArgsConstructor
@AllArgsConstructor
public class User {
    private String uname;
    private String upwd;
}

index.html

 <a href="loginui" th:if="${session.loginemp==null}">登录</a>
  <div th:unless="${session.loginemp==null}">
      用户名：<span th:text="${session.loginemp.uname}"></span>
      <a href="loginout" > 注销登录</a>
  </div>

如有疑问，去资源下载：https://download.youkuaiyun.com/download/zhangting123123/88362884?spm=1001.2014.3001.5503