spring boot 项目中使用thymeleaf模板的案例分析

准备
MySql数据库，表Prereg，IDEA
数据库中的表如下所示：

在这里插入图片描述

IDEA目录结构如下：

在这里插入图片描述

添加thymeleaf依赖：

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

开始添加代码：
在controller包添加类“PreregController”

package com.example.demo.controller;

import com.example.demo.mapper.PreregMapper;
import com.example.demo.pojo.Prereg;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.annotation.Resource;
import java.util.List;

@Controller
public class PreregController {
	@Resource
	PreregMapper preregMapper;
	
	@RequestMapping("/listPrereg")
	public String listPrereg(Model model)
	{
		List<Prereg> preregs=preregMapper.findAll();
		model.addAttribute("preregs",preregs);
		return "listPrereg";
	}
}

在Mapper包下添加映射interface:“PreregMapper”

package com.example.demo.mapper;

import com.example.demo.pojo.Prereg;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;
import org.springframework.boot.autoconfigure.data.jpa.JpaRepositoriesAutoConfiguration;
import java.util.List;

@Mapper
public interface PreregMapper {
@Select("SELECT * FROM Prereg")
List<Prereg> findAll();
}

在pojo包下添加类Prereg：

package com.example.demo.pojo;

import java.util.Date;

public class Prereg {
private String StuId;
private String StuName;
private String Trans;
private int IsCompany;
private int PeopleCount;
private Date ArrTime;

public String getStuId() {
return StuId;
}

public void setStuId(String stuId) {
StuId = stuId;
}

public String getStuName() {
return StuName;
}

public void setStuName(String stuName) {
StuName = stuName;
}

public String getTrans() {
return Trans;
}

public void setTrans(String trans) {
Trans = trans;
}

public int getIsCompany() {
return IsCompany;
}

public void setIsCompany(int isCompany) {
IsCompany = isCompany;
}

public int getPeopleCount() {
return PeopleCount;
}

public void setPeopleCount(int peopleCount) {
PeopleCount = peopleCount;
}

public Date getArrTime() {
return ArrTime;
}

public void setArrTime(Date arrTime) {
ArrTime = arrTime;
}

@Override
public String toString() {
return "Prereg{" +
"StuId='" + StuId + '\'' +
", StuName='" + StuName + '\'' +
", Trans='" + Trans + '\'' +
", IsCompany=" + IsCompany +
", PeopleCount=" + PeopleCount +
", ArrTime=" + ArrTime +
'}';
}
}

注：小技巧：定义好变量后，Alt+insert弹出“Generate”,选择“Getter and Setter”,再选择toString()即可完成。
最后是写HTML页面：

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>springboot-thymeleaf demo</title>
</head>
	<body>
		<table border="1" width="1000">
			<thead>
				<tr>
					<td>学生学号</td>
					<td>学生姓名</td>
					<td>到达时间</td>
					<td>家人陪伴</td>
					<td>陪伴数量</td>
					<td>交通工具</td>
				</tr>
			</thead>
			<tr th:each="item: ${preregs}">
				<td th:text="${item.stuId}"></td>
				<td th:text="${item.stuName}"></td>
				<td th:text="${item.arrTime}"></td>
				<td th:text="${item.isCompany}"></td>
				<td th:text="${item.peopleCount}"></td>
				<td th:text="${item.trans}"></td>
			</tr>
		</table>
	</body>
</html>

效果图如下：

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