Thymeleaf 迭代,if,switch语法

1、Thymeleaf 目标

迭代语法：th:each; iteration status
条件语法：th:if; th:unless
switch语法：th:switch; th:case; *

2、公共模拟SpringBoot 后台接口

后台逻辑（action）

// 分页查询
   @RequestMapping("/allColumnValidates")
   public String getPage(Model model, @RequestParam(defaultValue = "1") int pageNo,
           @RequestParam(defaultValue = "10") int pageSize) {
       // 注意:分页代码PageHelper.startPage(pageNo,pageSize);只对其后的第一个查询有效。
       PageHelper.startPage(pageNo, pageSize);
       List<ColumnValidate> list = service.selectAll();

       PageInfo pageInfo = new PageInfo(list);
       model.addAttribute("pageInfo", pageInfo);
       // 获得当前页
       model.addAttribute("pageNum", pageInfo.getPageNum());
       // 获得一页显示的条数
       model.addAttribute("pageSize", pageInfo.getPageSize());
       // 是否是第一页
       model.addAttribute("isFirstPage", pageInfo.isIsFirstPage());
       // 获得总页数
       model.addAttribute("totalPages", pageInfo.getPages());
       // 是否是最后一页
       model.addAttribute("isLastPage", pageInfo.isIsLastPage());

       return "validate/validate";
   }

   // 跳转至新增页面
   @RequestMapping(value = "/insertPage", method = { RequestMethod.GET })
   public String insertPage() {
       return "validate/add";
   }

   // 插入
   @RequestMapping(value = "/insert", method = { RequestMethod.POST })
   public String insert(ColumnValidate entity) {
       IdGenerator idWorker = new IdGenerator(0,0);
       String sid = String.valueOf(idWorker.nextId());
       entity.setSid(sid);
       // 默认始化值
       entity.setCreateDt(new Date());
       entity.setDeleteFlag(GlobalConstant.DELETE_FLAG_NO);
       entity.setState(GlobalConstant.ENABLE);
       entity.setVersion(GlobalConstant.DEFAULT_VALUE);
       service.insert(entity);
       // 字段验证规则新增成功，调整至字段验证首页
       return "redirect:/api/column-validate/allColumnValidates";
   }

实体对象:

package com.zzg.entity;

import java.util.Date;

import org.springframework.format.annotation.DateTimeFormat;

import com.zzg.common.core.model.BaseEntity;

public class ColumnValidate extends BaseEntity {
   private String sid;

   private String createBy;

   private Date createDt;

   private String updateBy;

   private Date updateDt;

   private Integer version;

   private String validateName;

   private String validateContent;

   private String state;

   private String deleteFlag;

   private static final long serialVersionUID = 1L;

   public String getSid() {
       return sid;
   }

   public void setSid(String sid) {
       this.sid = sid == null ? null : sid.trim();
   }

   public String getCreateBy() {
       return createBy;
   }

   public void setCreateBy(String createBy) {
       this.createBy = createBy == null ? null : createBy.trim();
   }

   @DateTimeFormat(pattern = "dd-MMM-YYYY")
   public Date getCreateDt() {
       return createDt;
   }

   public void setCreateDt(Date createDt) {
       this.createDt = createDt;
   }

   @DateTimeFormat(pattern = "dd-MMM-YYYY")
   public String getUpdateBy() {
       return updateBy;
   }

   public void setUpdateBy(String updateBy) {
       this.updateBy = updateBy == null ? null : updateBy.trim();
   }

   public Date getUpdateDt() {
       return updateDt;
   }

   public void setUpdateDt(Date updateDt) {
       this.updateDt = updateDt;
   }

   public Integer getVersion() {
       return version;
   }

   public void setVersion(Integer version) {
       this.version = version;
   }

   public String getValidateName() {
       return validateName;
   }

   public void setValidateName(String validateName) {
       this.validateName = validateName;
   }

   public String getValidateContent() {
       return validateContent;
   }

   public void setValidateContent(String validateContent) {
       this.validateContent = validateContent;
   }

   public String getState() {
       return state;
   }

   public void setState(String state) {
       this.state = state == null ? null : state.trim();
   }

   public String getDeleteFlag() {
       return deleteFlag;
   }

   public void setDeleteFlag(String deleteFlag) {
       this.deleteFlag = deleteFlag == null ? null : deleteFlag.trim();
   }

   @Override
   public String toString() {
       StringBuilder sb = new StringBuilder();
       sb.append(getClass().getSimpleName());
       sb.append(" [");
       sb.append("Hash = ").append(hashCode());
       sb.append(", sid=").append(sid);
       sb.append(", createBy=").append(createBy);
       sb.append(", createDt=").append(createDt);
       sb.append(", updateBy=").append(updateBy);
       sb.append(", updateDt=").append(updateDt);
       sb.append(", version=").append(version);
       sb.append(", validateName=").append(validateName);
       sb.append(", validateContent=").append(validateContent);
       sb.append(", state=").append(state);
       sb.append(", deleteFlag=").append(deleteFlag);
       sb.append("]");
       return sb.toString();
   }
}

3、Thymeleaf 迭代语法：

<tr th:each="obj : ${pageInfo.list}">
               <td th:text="${obj.validateName}"></td>
               <td th:text="${obj.validateContent}"></td>
               <td th:text="${obj.sid}"></td>
               <td th:text="${obj.createBy}"></td>
               <td th:text="${#dates.format(obj.createDt,'yyyy-MM-dd')}"></td>
               <td th:text="${obj.updateBy}"></td>
               <td th:text="${#dates.format(obj.updateDt,'yyyy-MM-dd')}"></td>
               
               <td th:if="${obj.state} == 1" th:text="启用"></td>
               <td th:if="${obj.state} == 2" th:text="禁用"></td>

               <td th:if="${obj.deleteFlag} == 1" th:text="未删除"></td>
               <td th:if="${obj.deleteFlag} == 2" th:text="已删除"></td>
               <td>
                   <a th:href="@{/api/column-validate/insertPage}" class="btn btn-info btn-sm">修改</a>
                   <a th:href="@{/api/column-validate/insertPage}" class="btn btn-info btn-sm">删除</a>
               </td>
           </tr>

Thymeleaf 判断语法：

<td th:if="${obj.state} == 1" th:text="启用"></td>
               <td th:if="${obj.state} == 2" th:text="禁用"></td>

               <td th:if="${obj.deleteFlag} == 1" th:text="未删除"></td>
               <td th:if="${obj.deleteFlag} == 2" th:text="已删除"></td>

Thymeleaf switch语法：

<div th:switch="${user.name}">
<p th:case="'admin'">User is an administrator</p>

<p th:case="*">User is some other thing</p>
</div>

Thymeleaf 迭代,if,switch语法

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