SpringBoot整合MyBatis项目进行CRUD操作项目示例
发布时间：2024年01月18日
SpringBoot整合MyBatis项目进行CRUD操作项目示例
1.1.需求分析
通过使用 SpringBoot+MyBatis整合实现一个对数据库中的 users 表的 CRUD
1.2.创建工程
04_springboot_mybatis
1.3.pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.3.2.RELEASE</version>
</parent>
<groupId>com.by</groupId>
<artifactId>04_springboot_mybatis</artifactId>
<version>1.0-SNAPSHOT</version>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<!-- springBoot 的启动器 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- Mybatis 启动器 -->
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.0.1</version>
</dependency>
<!-- mysql 数据库驱动 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.38</version>
</dependency>
<!-- druid 数据库连接池 -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.0.9</version>
</dependency>
<!-- 添加 junit 环境的 jar 包 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.0</version>
</dependency>
</dependencies>
</project>
1.4.application.properties
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/springboot
spring.datasource.username=root
spring.datasource.password=1111
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
mybatis.type-aliases-package=com.by.pojo
logging.level.com.by.mapper=DEBUG
1.5.启动类
@SpringBootApplication
@MapperScan("com.by.mapper") // @MapperScan 用户扫描MyBatis的Mapper接口
public class App {
public static void main(String[] args) {
SpringApplication.run(App.class, args);
}
}
2.添加用户
2.1.数据表设计
CREATE TABLE `user` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`nam` varchar(255) DEFAULT NULL,
`sex` int(11) DEFAULT NULL,
`pwd` varchar(255) DEFAULT NULL,
`birth` datetime DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=11 DEFAULT CHARSET=utf8;
2.2.pojo
public class User {
private Integer id;
private String nam;
private String pwd;
private Integer sex;
private Date birth;
}
2.3.mapper
public interface UserMapper {
public void insertUser(User user);
}
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.by.mapper.UserMapper">
<insert id="insertUser" parameterType="user">
insert into user(nam,pwd,sex,birth) values(#{nam},#{pwd},#{sex},#{birth})
</insert>
</mapper>
2.4.service
@Service
@Transactional
public class UserServiceImpl implements UserService {
@Autowired
private UserMapper userMapper;
@Override
public void addUser(User user) {
this.userMapper.insertUser(user);
}
}
2.5.junit
/**
* main方法：
* ApplicationContext ac=new
* ClassPathXmlApplicationContext("classpath:applicationContext.xml");
* junit与spring整合：
* @RunWith(SpringJUnit4ClassRunner.class)：让junit与spring环境进行整合
* @Contextconfiguartion("classpath:applicationContext.xml")
* junit与SpringBoot整合：
* @RunWith(SpringJUnit4ClassRunner.class)：让junit与spring环境进行整合
* @SpringBootTest(classes={App.class})：加载SpringBoot启动类。启动springBoot
*/
@RunWith(SpringJUnit4ClassRunner.class)
@SpringBootTest(classes={App.class})
public class UserServiceTest {
@Autowired
private UserService userService;
@Test
public void testAddUser(){
User user = new User();
user.setId(1);
user.setNam("二狗");
user.setPwd("111");
user.setSex(1);
user.setBirth(new Date());
this.userService.addUser(user);
}
}
2.6.controller
@Controller
@RequestMapping("/user")
public class UserController {
@Autowired
private UserService userService;
/**
* 页面跳转
*/
@RequestMapping("/{page}")
public String showPage(@PathVariable String page) {
return page;
}
/**
* 添加用户
*/
@RequestMapping("/addUser")
public String addUser(User user) {
this.userService.addUser(user);
return "ok";
}
}
2.7.thymeleaf
add.html
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>添加用户</title>
</head>
<body>
<h3>新增用户</h3>
<hr/>
<form th:action="@{/user/addUser}" method="post">
姓名：<input type="text" name="nam"/><br/>
密码：<input type="text" name="pwd"/><br/>
性别：<input type="radio" name="sex" value="1"/>女
<input type="radio" name="sex" value="0"/>男<br/>
生日：<input type="text" name="birth"/><br/>
<input type="submit" value="确定"/><br/>
</form>
</body>
</html>
2.8.测试
3.查询用户
3.1.mapper
public List<User> listUser();
<select id="listUser" resultType="user">
select * from user
</select>
3.2.service
@Override
public List<User> listUser() {
return userMapper.listUser();
}
3.4.controller
/**
* 查询全部用户
*/
@RequestMapping("/listUser")
public String listUser(Model model) {
List<User> list = this.userService.listUser();
model.addAttribute("list", list);
return "list";
}
3.5.thymeleaf
list.html
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>首页</title>
<style type="text/css">
table {border-collapse: collapse; font-size: 14px; width: 80%; margin: auto}
table, th, td {border: 1px solid darkslategray;padding: 10px}
</style>
</head>
<body>
<div style="text-align: center">
<span style="color: darkslategray; font-size: 30px">欢迎光临！</span>
<hr/>
<table class="list">
<tr>
<th>id</th>
<th>姓名</th>
<th>密码</th>
<th>性别</th>
<th>生日</th>
</tr>
<tr th:each="user : ${list}">
<td th:text="${user.id}"></td>
<td th:text="${user.nam}"></td>
<td th:text="${user.pwd}"></td>
<td th:text="${user.sex==1}?'男':'女'"></td>
<td th:text="${#dates.format(user.birth,'yyyy-MM-dd')}"></td>
</tr>
</table>
</div>
</body>
</html>
3.6.测试
4.用户登录
4.1.mapper
public Users login(User user);
<select id="login" parameterType="User" resultType="User">
select * from user where nam=#{nam} and pwd=#{pwd}
</select>
4.2.service
@Override
public Users login(User user) {
return userMapper.login(user);
}
4.4.controller
@RequestMapping("/login")
public String login(Model model, User user, HttpSession session) {
User loginUser = usersService.login(user);
if(user!=null){
session.setAttribute("loginUser", loginUser);
return "redirect:/user/listUser";
}
return "login";
}
添加PageController
@Controller
public class PageController {
@RequestMapping("/")
public String showLogin(){
return "login";
}
}
4.5.thymeleaf
login.html
<html>
<head>
<meta charset="UTF-8">
<title>注册</title>
</head>
<body>
<center>
<h3>登录</h3>
<hr/>
<form th:action="@{/user/login}" method="post">
账号：<input type="text" name="nam"/><br/>
密码：<input type="text" name="pwd"/><br/>
<input type="submit" value="确定"/><br/>
</form>
</center>
</body>
</html>
4.6.测试
5.SpringBoot整合日期转换器
5.1.添加日期转换器
import java.text.ParseException;
import java.util.Date;
import org.springframework.core.convert.converter.Converter;
import org.apache.commons.lang3.time.DateUtils;
public class DateConverter implements Converter<String, Date>{
@Override
public Date convert(String str) {
String[] patterns = new String[]{
"yyyy-MM-dd","yyyy-MM-dd hh:mm:ss","yyyy/MM/dd","yyyy/MM/dd hh:mm:ss",
"MM-dd-yyyy","dd-MM-yyyy"};
try {
Date date = DateUtils.parseDate(str, patterns);
return date;
} catch (ParseException e) {
e.printStackTrace();
}
return null;
}
}
5.2.配置日期转换器
-
说明
WebMvcConfigurer配置类其实是
Spring内部的一种配置方式，采用JavaBean的形式来代替传统的xml配置文件形式针对框架进行个性化定制，例如：拦截器，类型转化器等等。 -
代码示例
import com.by.converter.DateConverter; import org.springframework.context.annotation.Configuration; import org.springframework.format.FormatterRegistry; import org.springframework.web.servlet.config.annotation.InterceptorRegistry; import org.springframework.web.servlet.config.annotation.WebMvcConfigurer; @Component public class MyConfig implements WebMvcConfigurer { @Override public void addFormatters(FormatterRegistry registry) { registry.addConverter(new DateConverter()); } }
6.SpringBoot整合拦截器
6.1.添加拦截器
package com.by.interceptor;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.by.pojo.Users;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
public class LoginInterceptor implements HandlerInterceptor{
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response,
Object handler)throws Exception {
Users user = (Users) request.getSession().getAttribute("user");
if(user!=null){
return true;
}
response.sendRedirect("/");
return false;
}
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response,
Object handler,ModelAndView modelAndView) throws Exception {
}
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response,
Object handler, Exception ex)throws Exception {
}
}
6.2.配置拦截器
修改MyConfig
//<mvc:interceptors>
@Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(new LoginInterceptor()).addPathPatterns("/emp/**");
}
文章来源:https://blog.csdn.net/qq_62124267/article/details/135662251
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