springboot集成mybatis
1,整体结构
2,需要的依赖
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.1.3</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.12</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.2.1</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.xmlunit</groupId>
<artifactId>xmlunit-core</artifactId>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.4.6</version>
</dependency>
</dependencies>
声明一下,web架构需要thymeleaf支持,而mybatis需要mybatis-spring-boot-starter支持
3,新建application.yml文件
在resources目录下新建yml文件,用于存放数据库连接需要的一些数据,也可以不建,直接将这些数据放在application.properties文件下,不过格式得转换
spring:
datasource:
driver-class-name: com.mysql.jdbc.Driver
url: jdbc:mysql://localhost:3306/weixin?serverTimezone=GMT%2B8&useSSL=true
username: root
password: zhs03171812
4,在application.properties文件中加入:
#端口号
server.port=8080
#druid数据库连接池
type=com.alibaba.druid.pool.DruidDataSource
#清除缓存
spring.thymeleaf.cache=false
#配置mapper
mybatis.mapper-locations=classpath:mapper/*.xml
5,在pojo下的新建类UserLogin
package com.example.weixin_01.pojo;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
@Data
@AllArgsConstructor
@NoArgsConstructor
public class UserLogin {
private String username;
private String password;
}
6,新建数据库,名为weixin,名可以随意,不过要与application.yml文件中的一致
7,建表,名为userLogin
8,mapper层
新建UserLoginMapper接口
package com.example.weixin_01.mapper;
import com.example.weixin_01.pojo.UserLogin;
import org.apache.ibatis.annotations.Mapper;
import org.springframework.stereotype.Repository;
import java.util.List;
@Mapper
@Repository
public interface UserLoginMapper {
//查询
public List<UserLogin> queryAll();
//添加数据
public int add(UserLogin userLogin);
//根据用户名查询数据
public UserLogin queryByName(String username);
}
9,在resources目录下新建mapper目录,并在这个目录下新建UserLoginMapper.xml文件,并在application.properties中注册该组件,前面已经注册
<?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.example.weixin_01.mapper.UserLoginMapper">
<select id="queryAll" resultType="com.example.weixin_01.pojo.UserLogin">
select * from userLogin
</select>
<insert id="add" parameterType="com.example.weixin_01.pojo.UserLogin">
insert into userLogin values (#{username},#{password})
</insert>
<select id="queryByName" resultType="com.example.weixin_01.pojo.UserLogin">
select * from userLogin where username = #{username}
</select>
</mapper>
10,测试
在test文件中,先测试是否能联通数据库,可以自己在数据库中插入一个数据,然后测试时查询全部,看看能否将自己插入的数据查询出来,如果可以,则数据库连接这部分就没问题
package com.example.weixin_01;
import com.example.weixin_01.mapper.UserLoginMapper;
import com.example.weixin_01.pojo.UserLogin;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import javax.sql.DataSource;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.List;
@SpringBootTest
class Weixin01ApplicationTests {
@Autowired
DataSource dataSource;
@Test
void contextLoads() throws SQLException {
System.out.println(dataSource.getClass());
Connection connection = dataSource.getConnection();
System.out.println(connection);
//template模板,拿来即用
connection.close();
}
@Autowired
UserLoginMapper userLoginMapper;
@Test
public void toTest(){
List<UserLogin> userLogins = userLoginMapper.queryAll();
userLogins.forEach(e-> System.out.println(e));
}
}
11,services层
在services下新建接口UserLoginServicesI和类UserLoginServicesImpl
UserLoginServicesI接口:
package com.example.weixin_01.services;
import com.example.weixin_01.pojo.UserLogin;
import java.util.List;
public interface UserLoginServicesI {
//查询
public List<UserLogin> queryAll();
//添加数据
public int add(UserLogin userLogin);
//根据用户名查询数据
public UserLogin queryByName(String username);
}
UserLoginServicesImpl类
package com.example.weixin_01.services;
import com.example.weixin_01.mapper.UserLoginMapper;
import com.example.weixin_01.pojo.UserLogin;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public class UserLoginServicesImpl implements UserLoginServicesI {
@Autowired
UserLoginMapper userLoginMapper;
@Override
public List<UserLogin> queryAll() {
return userLoginMapper.queryAll();
}
@Override
public int add(UserLogin userLogin) {
return userLoginMapper.add(userLogin);
}
@Override
public UserLogin queryByName(String username) {
return userLoginMapper.queryByName(username);
}
}
12,conteoller层
编写MyController类
package com.example.weixin_01.controller;
import com.example.weixin_01.pojo.UserLogin;
import com.example.weixin_01.services.UserLoginServicesImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
public class MyController {
@Autowired
UserLoginServicesImpl userLoginServicesImpl;
@RequestMapping("/toLogin")
public String toLogin(){
return "login";
}
@RequestMapping("/LoginSuccess")
public String LoginSuccess(Model model, UserLogin userLogin){
//先查询看该用户名是否存在
UserLogin userLogin1 = userLoginServicesImpl.queryByName(userLogin.getUsername());
if(userLogin1 != null){ // 如果查询的用户不为空
System.out.println(userLogin1.toString());
return "success";
}
else{
//返回到登录页面
model.addAttribute("data","该用户不存在,请先注册");
return "login";
}
}
//登录界面
@RequestMapping("/toRegister")
public String toRegister(){
return "register";
}
@RequestMapping("/RegisterSuccess")
public String toRegisterSuccess(Model model,UserLogin userLogin){
//将账号密码加入到数据库中
int add = userLoginServicesImpl.add(userLogin);
System.out.println("数据插入成功!");
model.addAttribute("data","注册成功,请登录!");
return "login";
}
}
13,编写前端页面
将这些页面放在templates下面
随便编写了一下,没有用bootstrap美化一下。。
1,login.html:登录页面
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body style="background: aqua">
<div align="center">
<br><br><h2>登录界面</h2><br><br>
<span th:text="${data}" style="text-color:red;font-size: 10px"></span>
<form method="get" action="/LoginSuccess">
用户名:<input type="text" name="username" placeholder="请输入用户名" required/><br><br>
密码:<input type="text" name="password" placeholder="请输入密码" required/><br><br>
<input type="submit" value="登录">
</form>
<br>
<form method="get" action="/toRegister">
<input type="submit" value="注册">
</form>
</div>
</body>
</html>
2,register.html:注册页面
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body style="background: aqua">
<div align="center">
<br><br>注册界面<br><br>
<form method="get" action="/RegisterSuccess">
用户名:<input type="text" name="username" placeholder="请输入用户名" required/><br><br>
密码:<input type="text" name="password" placeholder="请输入密码" required/><br><br>
确认密码:<input type="text" name="password2" placeholder="请输入密码" required/><br><br>
<input type="submit" value="注册">
</form>
</div>
</body>
</html>
3,success.html:成功界面
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<h1>success</h1>
</body>
</html>
14,运行一下
网页输入:localhost:8080/toLogin
大概就这样。。。
15,输入用户名和密码
输入用户名和密码,点击登录,如果数据库中存在该账号,则跳转到success页面,
这里就实现了数据的查询,通过username方式查询
如果账号不存在,则显示用户名不存在,请先注册
16,注册
点击注册进入注册页面,这里主要实现了数据的增加
点击注册后
17,验证
查看数据库中的数据
张三已经注册成功,当然也可以实现登录了!
标签:集成,springboot,weixin,UserLogin,import,mybatis,org,com,public From: https://blog.csdn.net/2401_82767224/article/details/139432941