Thymeleaf 迭代,if,switch语法

1、Thymeleaf 目标

1. 迭代语法：th:each; iteration status
2. 条件语法：th:if; th:unless
3. 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：

<!--Thymeleaf迭代语句each  --> 
			<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> 
				<!--Thymeleaf 判断语句:if 和 switch  --> 
				<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：

	<!--Thymeleaf 判断语句:if 和 switch  --> 
				<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：

<!-- th:switch / th:case --> 
<div th:switch="${user.name}"> 
  <p th:case="'admin'">User is an administrator</p> 
  <!-- *: case的默认的选项 --> 
  <p th:case="*">User is some other thing</p> 
</div>