Thymeleaf 迭代,if,switch语法

深碍√TFBOYSˉ_ 2023-10-18 18:33 10阅读 0赞

**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：**

<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>