我正試圖學習如何使用springboot和thymeleaf製作一個web應用程序。作爲一個練習,我想從一個隨機數據庫表中顯示兩列,我在一個簡單的html表格中創建了mysql(個人)。Springboot +百里香在html表中顯示數據庫內容
我已經使用了幾個教程,並編寫了下面的代碼,但是我的html不顯示數據庫的內容只有表頭。我完全不知道我錯在哪裏。我在這裏查詢了其他問題,他們都使用了一種叫做jpa的東西。這比我的方法好嗎?如果是的話,我可以在哪裏找到一個begginer的教程。
代碼
App類
package ro.database.jdbcTest;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.scheduling.annotation.EnableAsync;
import ro.database.jdbcTest.controllers.UsersController;
@SpringBootApplication
@EnableAsync
public class App
{
@Autowired
UsersController service;
public static void main(String[] args)
{
SpringApplication.run(App.class);
}
}
控制器
package ro.database.jdbcTest.controllers;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import ro.database.jdbcTest.model.Users;
import ro.database.jdbcTest.services.UserService;
import java.util.List;
import java.util.Map;
@Controller
public class UsersController {
@Autowired
UserService service;
@RequestMapping(value = "/user", method = RequestMethod.GET)
public String index(Model md){
md.addAttribute("user", service.findAll());
return "user";
}
}
服務類
package ro.database.jdbcTest.services;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowMapper;
import org.springframework.stereotype.Service;
import ro.database.jdbcTest.model.Users;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;
@Service
public class UserService {
@Autowired
JdbcTemplate template;
public List<Users> findAll() {
String sql = "select * from people";
RowMapper<Users> rm = new RowMapper<Users>() {
@Override
public Users mapRow(ResultSet resultSet, int i) throws SQLException {
Users user = new Users(resultSet.getInt("id"),
resultSet.getString("name"),
resultSet.getInt("age"));
String email = resultSet.getString("email");
if (email != null) {
user.setEmail(email);
}
return user;
}
};
return template.query(sql, rm);
}
和模型類
package ro.database.jdbcTest.model;
public class Users {
private int id;
private String name;
private int age;
private String email;
public Users(int id, String name, int age){
this.id=id;
this.name=name;
this.age=age;
}
public void setEmail(String email){
this.email=email;
}
}
的Html
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.w3.org/1999/xhtml">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<h2>Users</h2>
<table border="1">
<tr>
<th>name</th>
<th>age</th>
</tr>
<tr th:each = "user: ${users}">
<td th:text="${user.name}">vasile</td>
<td th:text="${user.age}">45</td>
</tr>
</table>
</body>
</html>
,你綁定數據 – Zico
添加HTML代碼 – Adi